Date   

Re: Kchibo antenna experiments installment 2 (trying to analyze Ray's loop)

Steve Ratzlaff
 

Ray can give details about his loop--inductance, min/max of his variable cap used to tune it, etc.
I used a program by Reg Edwards to "reverse engineer" Ray's loop given the details Ray has already given--two foot square box loop (610 mm/side), with 11 turns spaced 7 mm.
Reg Edward's program "rjeloop3" (which will only run on older Win XP and earlier machines)--can be downloaded at:
http://g4gcp.sheard.org/antenna/download.htm .

I entered 610 mm length of one side; 11 turns; 1 mm wire diameter (just a convenient guess); 7 mm winding pitch (7 mm spacing vs. 1 mm wire diameter); 531 kHz frequency (bottom of BCB for Ray's southern Australia location)--that will give the max value needed for the variable cap to tune down to the bottom of the band.
The program then calculated the loop as 156 uH; 574 pF needed to resonate at 531 kHz; Q at 531 kHz approx 238 (giving a bandwidth at 531 khz of 2231 Hz; 124.1 kohm impedance across the loop at resonance at 531 kHz; a one turn coupling loop would have 1 kohm output impedance (seen by the receiver) at 531 kHz.
One can change the frequency to see how much capacitance would be needed at the top of the band, and change any of the other parameters as desired.
So Ray can tell us how close his actual loop and variable cap comes to what the program calculated. Loop inductance given by the program is on the low side; maybe Ray's variable cap is a two-section cap in parallel to give more capacitance?
Of course best Q for any loop will occur at minimum frequency (531 kHz) and will decrease (increasing bandwidth) as frequency rises. But Ray may already be able to tune one sideband by itself when tuned to the bottom of the band, assuming he has a station on 531 kHz he can receive.
The software program doesn't differentiate types of wire used, just wire diameter. So switching to Litz wire would give lower RF resistance and higher loop Q, plus Litz can be wound with no turns spacing if desired since it has much lower turn to turn capacitance compared to non-Litz. But having some spacing between turns even with Litz will always give the lowest distributed capacitance compared to turns with no spacing.

Best regards,
Steve

On 3/16/2015 3:59 PM, Phillips phillicom@... [ultralightdx] wrote:

Thank you Everett,

I am trying to duplicate reports of box loop tuning so sharp that it is possible to select which sideband to use. The idea is to use cheap hookup wire to get as far as possible and then use expensive Litz for the final product if the hookup wire version is near the mark.

I don't have an RF meter but I do have an oscilloscope that covers the MW band. The CRO will measure the RF and only load it with 1MOhms and a few pF.
Winding a balun is easy enough.
I need to finish the ferrite experiments first but I will get working on the box loop again.


Ray
35S138E


Re: Kchibo antenna experiments installment 2

Rik
 

So far I have one more question. Since I listen to radio programing and even music on AM radio, with Litz wire for the turns on your one meter  loops, is the selectivity so sharp the audio bandwidth is too narrow for program listening?

If you have a TECSUN with adjustable selectivity, what is the widest setting which is not narrowed by the antenna with Litz wire turns?

I hope you can figure out what I am asking. - FARMERIK


Re: Kchibo antenna experiments installment 2

Everett N4CY
 

I live in Tuscaloosa, AL. If your core is for AM there is a good chance that it is made with 73 mix material. I can't remember what the wire size was that I used, but it was maybe 24 gage. It doesn't really make any difference, as long as it is small enough to get 18 turns wound on the core, 2/16 turns. Adding this matching transformer will make no difference in the loop's performance if you are using induction coupling, however, it makes a major difference in coupling to a 50 ohm load. 
 
Everett


On Mar 16, 2015, at 7:53 PM, farmerik@... [ultralightdx] <ultralightdx@...> wrote:

 

Everett -

You may as well mention where you are located.

None of my home made loops use Litz wire [so far].

My three PK loops do tune sharper, with a definate peak.

I'll have to dig out my binocular  ferrite and see what it is. The mix was suitable for AM BCB.

-FARMERIK in CT.


Re: Kchibo antenna experiments installment 2

Rik
 

Everett -

You may as well mention where you are located.

None of my home made loops use Litz wire [so far].

My three PK loops do tune sharper, with a definate peak.

I'll have to dig out my binocular  ferrite and see what it is. The mix was suitable for AM BCB.

-FARMERIK in CT.


Re: Kchibo antenna experiments installment 2

Everett N4CY
 

Both loops work very well, with very sharp tuning and I used them as a standard for comparing the performance of some of the FSL's that I built. I still have them, no longer use them, I want to sell them, but they are too difficult to ship. Need to find someone in my local area that is interested. 

Everett N8CNP


On Mar 16, 2015, at 7:35 PM, farmerik@... [ultralightdx] <ultralightdx@...> wrote:

 

OK- I see your one meter loops in the files here. GORGOUS!!!!! 
Interesting you use both a single pick up turn and the 64:1 transformer for connecting to your R-75.

-FARMERIK


Re: Kchibo antenna experiments installment 2

Rik
 

OK- I see your one meter loops in the files here. GORGOUS!!!!! 
Interesting you use both a single pick up turn and the 64:1 transformer for connecting to your R-75.

-FARMERIK


Re: Kchibo antenna experiments installment 2

Rik
 

That sounds very interesting. What cap would tune your loop? Mine are tuned with 365-400 pF I think. Wouldn't it make a difference if the loop was tuned in the AM BCB by a cap much 'larger' or 'smaller'?

I experimented with 4:1, 6:1, 10:1 and 12:1, but never anywhere near 64:1.

Any others who know radio theory want to chime in here?

FARMERIK


CC Skywave-- TP-DX Seoul Music

Gary DeBock
 

Hello All,
 
For those considering a purchase of a new C.Crane Skywave and wondering how the 1 kHz DSP audio sounds for transoceanic DX recordings, here is recording of 603-HLSA (from Namyang, South Korea, a Seoul suburb) playing American classic rock at a good level yesterday. The good news is that the 1 kHz DSP audio sounds quite a bit more balanced than that of the Tecsun DSP Ultralights (PL-380, PL-310ET etc.), which tend to clip off the higher audio frequencies.
 
 
After Boston's "More Than a Feeling" at 1331 UTC the Doors rock the Pacific with "Touch Me." Unfortunately 603-China takes Jim Morrison's shouts a little bit too literally, and ends up taking over the frequency with its own music.
 
73, Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave + 15" FSL antenna
 
 


Re: Kchibo antenna experiments installment 2

Everett N4CY
 

Ray,

If you will look in the files section, you will see antennas and equipment, click on it and you will see two one meter loops that I built and a FSL project too. 

If you will just make the matching transformer that I described it will work fine on any loop. 

Everett N8CNP


On Mar 16, 2015, at 5:59 PM, Phillips phillicom@... [ultralightdx] <ultralightdx@...> wrote:

 

Thank you Everett,
 
I am trying to duplicate reports of box loop tuning so sharp that it is possible to select which sideband to use.   The idea is to use cheap hookup wire to get as far as possible and then use expensive Litz for the final product if the hookup wire version is near the mark.
 
I don't have an RF meter but I do have an oscilloscope that covers the MW band.   The CRO will measure the RF and only load it with 1MOhms and a few pF. 
Winding a balun is easy enough. 
I need to finish the ferrite experiments first but I will get working on the box loop again.
 
 
Ray
35S138E

 
COLEMAK
The keyboard layout for rational thinkers
Available for Windows, Mac, Linux & Android

 

To: ultralightdx@...
From: ultralightdx@...
Date: Mon, 16 Mar 2015 05:18:30 -0500
Subject: Re: [ultralightdx] Re: Kchibo antenna experiments installment 2

 
Ray,

A few years ago I did a lot of experimenting with pick up loops for both FSLs and air loops. The problem that I had was similar to yours. When I tried connecting the pick up loop to the 50 ohm input to my Icom R75 it loaded the loop, or FSL to the point it was almost useless. Through experimenting I finally came up with a solution by using a matching transformer transformer, made using a ferrite binocular core (BN73-202) and winding it with 2 turns on one side and 16 turns on the other side, which gave me a ratio of 64:1, or 50/3200 ohms. The 16 turn side was connected to the loop and the 2 turn side to radio. 

How I arrived at the turns ratio was I connected a RF Meter to the loop tank circuit, tuned it to a local radio station and by experimented with different turns ratios until I found a combination that would give the radio a good signal and caused the least amount of voltage droop on the loop tank ci rcuit. 

Everett N8CNP



On Mar 16, 2015, at 1:48 AM, Phillips phillicom@... [ultralightdx] <ultralightdx@...> wrote:

 


Thank you for your feedback.   The Kchibo does display the S/N.  I have noted those figures but have been leaving them out of the postings for clarity's sake.

I am planning a summary at the end and will include the S/N then.

Ray
35S138E

 
COLEMAK
The keyboard layout for rational thinkers
Available for Windows, Mac, Linux & Android



To: ultralightdx@...
From: ultralightdx@...
Date: Sun, 15 Mar 2015 17:31:12 -0700
Subject: [ultralightdx] Re: Kchibo antenna experiments installment 2

 
Thanks, I am eager to follow your work closely. I did some  antenna experiments a few years ago, and use the RSSI readings to compare. As I went along, I paid more attention to the S/N ratio than the signal strength. I am unfamiliar with your radio, which may not show S/N. I used TECSUN models. The digital readout gives an instant number for comparison so you can quickly change to something else before reception conditions change much. Thanks for sharing your results here, - FARMERIK CT USA



Re: Kchibo antenna experiments installment 2

Phillips
 

Thank you Everett,
 
I am trying to duplicate reports of box loop tuning so sharp that it is possible to select which sideband to use.   The idea is to use cheap hookup wire to get as far as possible and then use expensive Litz for the final product if the hookup wire version is near the mark.
 
I don't have an RF meter but I do have an oscilloscope that covers the MW band.   The CRO will measure the RF and only load it with 1MOhms and a few pF. 
Winding a balun is easy enough. 
I need to finish the ferrite experiments first but I will get working on the box loop again.
 
 
Ray
35S138E

 
COLEMAK
The keyboard layout for rational thinkers
Available for Windows, Mac, Linux & Android

 

To: ultralightdx@...
From: ultralightdx@...
Date: Mon, 16 Mar 2015 05:18:30 -0500
Subject: Re: [ultralightdx] Re: Kchibo antenna experiments installment 2

 
Ray,

A few years ago I did a lot of experimenting with pick up loops for both FSLs and air loops. The problem that I had was similar to yours. When I tried connecting the pick up loop to the 50 ohm input to my Icom R75 it loaded the loop, or FSL to the point it was almost useless. Through experimenting I finally came up with a solution by using a matching transformer transformer, made using a ferrite binocular core (BN73-202) and winding it with 2 turns on one side and 16 turns on the other side, which gave me a ratio of 64:1, or 50/3200 ohms. The 16 turn side was connected to the loop and the 2 turn side to radio. 

How I arrived at the turns ratio was I connected a RF Meter to the loop tank circuit, tuned it to a local radio station and by experimented with different turns ratios until I found a combination that would give the radio a good signal and caused the least amount of voltage droop on the loop tank circuit. 

Everett N8CNP



On Mar 16, 2015, at 1:48 AM, Phillips phillicom@... [ultralightdx] <ultralightdx@...> wrote:

 


Thank you for your feedback.   The Kchibo does display the S/N.  I have noted those figures but have been leaving them out of the postings for clarity's sake.

I am planning a summary at the end and will include the S/N then.

Ray
35S138E

 
COLEMAK
The keyboard layout for rational thinkers
Available for Windows, Mac, Linux & Android



To: ultralightdx@...
From: ultralightdx@...
Date: Sun, 15 Mar 2015 17:31:12 -0700
Subject: [ultralightdx] Re: Kchibo antenna experiments installment 2

 
Thanks, I am eager to follow your work closely. I did some  antenna experiments a few years ago, and use the RSSI readings to compare. As I went along, I paid more attention to the S/N ratio than the signal strength. I am unfamiliar with your radio, which may not show S/N. I used TECSUN models. The digital readout gives an instant number for comparison so you can quickly change to something else before reception conditions change much. Thanks for sharing your results here, - FARMERIK CT USA



Re: Dead DT-400W

Stephen H. Ponder <stephen_ponder@...>
 

Gary,

Thanks for the 'reset' info on the DT-400W. I have two of them. One I keep stowed away - without batteries - in my radio "vault" (closet). The other one stays by my side of the bed, batteries installed, ready for DX.

73 & Good DX,

Steve Ponder, N5WBI
Houston, TX
_____________________
Sent from my Kindle Fire HD


Re: Dead DT-400W

Gary Kinsman
 

All,

I'll answer my own question.

To reset the DT-400W, I left the batteries out of it for 20 to 30 minutes. After this, I put in some fresh batteries and it sprang back to life.

I'm glad to have my little yellow buddy back again, alive and well.

-Gary


Dead DT-400W

Gary Kinsman
 

Hello all,

I decided it was time to charge the NiMH batteries in my DT-200VX and DT-400W today. When I pulled the DT-400W out of its case, the display was blank. I put in a set of freshly-charged batteries and the display was still blank, and as expected, the power switch didn't work.

I don't see any reset hole in the DT-400W case. Is there a way to reset it?

Maybe it's just toast, although it seems odd that it would die just sitting peacefully in its case on battery power.

Regards,
Gary



Puyallup, WA Ultralight TP's for 3-16

Gary DeBock
 

Hello All,
 
As Richard reported Asian signals fell off somewhat this morning from yesterday's level, with mostly the usual low band performers showing up. The NHK big guns on 594, 693 and 747, 603-HLSA, 972-HLCA and the 1053 Jammer all managed brief good audio, and a few fair signals on 657 and 1044 rounded out a pretty modest morning.
 
At my 1310 start time 594-JOAK was setting the pace with good peaks in and out, followed by 693-JOAB and 747-JOIB a few minutes later. The high band sounded pretty dreary not only at the start time but throughout the session. 603-HLSA's pop music came up to good peaks around 1330, along with a few fair peaks of 657-Pyongyang's ancient orchestral music. 1044-CRI's Japanese service was in and out at a poor level from 1340-1350, while the 1053-Jammer managed a few good peaks around 1355. 972-HLCA reached several good levels throughout the session but had trouble breaking free of the Portland pest "Freedom 970." Overall the session was fairly average for March, and lacked the variety and intensity of yesterday's stellar performance.
 
603  HLSA   Namyang, S. Korea   "The Look of Love" classic pop music at a fair to good level at 1335
 
972  HLCA   Dangjin, S. Korea   Korean female speech at a good level at 1403, but needing freedom from "Freedom 970"
 
1053  Korean Jammer   Jamming the domestic splatter quite effectively around 1348
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave Ultralight +
17" FSL antenna
 
 


Oklahoma TP DX 3/16/15

bbwrwy
 

TP DX wasn't as good this morning as yesterday but a couple signals were heard.

594 JOAK - barely audible talking at 1121-1127 GMT.

747 JOIB - barely audible briefly at 1136.

774 JOUB - barely audible to poor from 1027 to 1236, peaking to fair at 1235 before fading away under KSPI-780 splatter.

828 unID (JOBB?) - het, no audio, in WCCO-830 QRM at 1236.


No signals observed on 567, 603, 657, 666, 693, 972 and 1053 when checked.


Receiver: C Crane Skywave (1 kHz bandwidth).

Antenna: Quantum QX+.


Good DX.


Richard Allen,

near Perry OK USA.




Re: Kchibo antenna experiments installment 2

Everett N4CY
 

Ray,

A few years ago I did a lot of experimenting with pick up loops for both FSLs and air loops. The problem that I had was similar to yours. When I tried connecting the pick up loop to the 50 ohm input to my Icom R75 it loaded the loop, or FSL to the point it was almost useless. Through experimenting I finally came up with a solution by using a matching transformer transformer, made using a ferrite binocular core (BN73-202) and winding it with 2 turns on one side and 16 turns on the other side, which gave me a ratio of 64:1, or 50/3200 ohms. The 16 turn side was connected to the loop and the 2 turn side to radio. 

How I arrived at the turns ratio was I connected a RF Meter to the loop tank circuit, tuned it to a local radio station and by experimented with different turns ratios until I found a combination that would give the radio a good signal and caused the least amount of voltage droop on the loop tank circuit. 

Everett N8CNP



On Mar 16, 2015, at 1:48 AM, Phillips phillicom@... [ultralightdx] <ultralightdx@...> wrote:

 

Thank you for your feedback.   The Kchibo does display the S/N.  I have noted those figures but have been leaving them out of the postings for clarity's sake.

I am planning a summary at the end and will include the S/N then.

Ray
35S138E

 
COLEMAK
The keyboard layout for rational thinkers
Available for Windows, Mac, Linux & Android



To: ultralightdx@...
From: ultralightdx@...
Date: Sun, 15 Mar 2015 17:31:12 -0700
Subject: [ultralightdx] Re: Kchibo antenna experiments installment 2

 
Thanks, I am eager to follow your work closely. I did some  antenna experiments a few years ago, and use the RSSI readings to compare. As I went along, I paid more attention to the S/N ratio than the signal strength. I am unfamiliar with your radio, which may not show S/N. I used TECSUN models. The digital readout gives an instant number for comparison so you can quickly change to something else before reception conditions change much. Thanks for sharing your results here, - FARMERIK CT USA


Re: Kchibo antenna experiments installment 2

Phillips
 

Thank you for your feedback.   The Kchibo does display the S/N.  I have noted those figures but have been leaving them out of the postings for clarity's sake.

I am planning a summary at the end and will include the S/N then.

Ray
35S138E

 
COLEMAK
The keyboard layout for rational thinkers
Available for Windows, Mac, Linux & Android



To: ultralightdx@...
From: ultralightdx@...
Date: Sun, 15 Mar 2015 17:31:12 -0700
Subject: [ultralightdx] Re: Kchibo antenna experiments installment 2

 
Thanks, I am eager to follow your work closely. I did some  antenna experiments a few years ago, and use the RSSI readings to compare. As I went along, I paid more attention to the S/N ratio than the signal strength. I am unfamiliar with your radio, which may not show S/N. I used TECSUN models. The digital readout gives an instant number for comparison so you can quickly change to something else before reception conditions change much. Thanks for sharing your results here, - FARMERIK CT USA


Re: Recording DX

Phillips
 


Hi Jim,

I just spent time waiting for some sockets to complete an audio attenuator so that I can record using mic or line in jacks to record. 

Finally all the parts arrived, I completed the attenuator and plugged it together expectantly - what a saga ensued.   I had planned to use a dinky little digital voice recorder about 65mm long that had excellent fidelity, an adjustable sample rate and recorded straight to MP3.   It is absolutely unusable due to the amount of MW QRM it generates.  More than the cordless phone and the touch lamp.  I had to go right out of the house to get away from its QRM.

Then I thought that I would use my PC - nup!
Got out the old laptop that I play Linux on - all good until it came time to plug into the mic jack - QRM to burn.

Finally I did my recording by holding an earbud over the mic hole of my mobile phone.  Not ideal to say the least.

I thought I might try adding some inductors to the attenuator but don't hold too much hope.   An analogue recording device is top of my list now.

My mind boggles over the thought that a mobile phone which contains a fairly fast processor and a 5 watt transmitter generates virtually undetectable QRM but a tiny voice recorder with no transmitter shouts its location to all and sundry.

Ray
35S138E


 
COLEMAK
The keyboard layout for rational thinkers
Available for Windows, Mac, Linux & Android



To: ultralightdx@...
From: ultralightdx@...
Date: Sun, 15 Mar 2015 07:40:58 -0700
Subject: [ultralightdx] Recording DX

 

I have rediscovered MW DX after moving from the US to Perth in Western Australia.  A good bit of the interesting stuff I can hear is in languages I don’t speak so would like to do some recording to play back (I’ve also been enjoying the recordings from Gary and others on here).  Back in the day, recording my DX was a matter of holding a cassette recorder up to the speaker, but I’m guessing better alternatives exist nowadays!  At the moment I’m using a Sangean PR-D5.  Thoughts anyone?  Thanks,  Jim


Re: Kchibo antenna experiments installment 2

Steve Ratzlaff
 

Hi Ray,
At least the way I understand loops, you can't change the impedance ratio unless you change the turns ratio. But certainly by reducing the pickup loop coupling you're improving the loop Q; you're just not doing it by changing the impedance ratio! Anything you do to reduce pickup loop coupling will move toward unloaded max Q of the main loop. Of course you eventually reach a point where you don't have enough signal in the pickup loop. Most folks change the coupling by varying the horizontal distance of the pickup loop from the main loop, usually by making the main loop wider so the pickup loop can be spaced farther from the main loop, with the pickup loop the same size as the main loop. But your way of doing it with a smaller loop will certainly work as you've obviously figured out how to physically mount the pickup loop.

Best regards,
Steve


On 3/15/2015 11:02 PM, Phillips phillicom@... [ultralightdx] wrote:

Thanks Steve,

I took the 11:1 turns ratio and then multiplied that by the area ratio (4:1) seeing as how the two loops are very loose coupled. This gives 44 which, when squared, is 1936. But, as always, I am ready to stand corrected. I am disappointed to learn that 121 is the correct figure because I had hoped that I was increasing the Q of the loop by keeping the coupling so loose.



Ray
35S138E



Re: Digest Number 2603

Tony King <tonyzl@...>
 

Paul, you're listening too early or too late. Summer isn't the best time
but try in June and July. Now, just before your local sunset is about 8 or
9.p.m. NZT when we still have daylight. To hear NZ in the early morning you
would need to listen no later than about 4.a.m. AEST. You need a darkness
path all the way. Best North American reception from NZ is currently 0700
UTC through to about 1000, from where you are it is likely to be from about
0900 UTC. In years gone by -like to 60's - I heard Californian stations at
2.a.m. NZT when they were starting breakfast programmes "from across the
cotton belt" (KFRE 940 was it)

Tony

On 16 March 2015 at 16:55, <ultralightdx@yahoogroups.com> wrote:

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15 Messages
Digest #2603
1
Oklahoma TP DX 3/15/15 <#14c20b907fef9011_1> by bbwrwy
2a
New ULR station 3/15/15. <#14c20b907fef9011_2a> by bbwrwy
2b
Re: New ULR station 3/15/15. <#14c20b907fef9011_2b> by bbwrwy
2c
Re: New ULR station 3/15/15. <#14c20b907fef9011_2c> by "Allen Willie"
vo1_001_swl
2d
Re: New ULR station 3/15/15. <#14c20b907fef9011_2d> by bbwrwy
3a
Recording DX <#14c20b907fef9011_3a> by
3b
Re: Recording DX <#14c20b907fef9011_3b> by bbwrwy
3c
Re: Recording DX <#14c20b907fef9011_3c> by jimbperth
3d
Re: Recording DX <#14c20b907fef9011_3d> by "Tony Magon" tonymagon
3e
Re: Recording DX <#14c20b907fef9011_3e> by "Tony Magon" tonymagon
4a
Puyallup, WA Ultralight TP's for 3-15 <#14c20b907fef9011_4a> by dxergary
5
Long Term Ultralight DXing Project Results - 15/03/2015
<#14c20b907fef9011_5> by paulgblundell
6
New Zealand Stations - MIA? <#14c20b907fef9011_6> by paulgblundell
7a
Kchibo antenna experiments installment 2 <#14c20b907fef9011_7a> by
"Phillips" sunumabidge
7b
Re: Kchibo antenna experiments installment 2 <#14c20b907fef9011_7b> by
farmerik

Messages
1 Oklahoma TP DX 3/15/15
<https://groups.yahoo.com/neo/groups/ultralightdx/conversations/topics/25027;_ylc=X3oDMTJzZTBtbW1pBF9TAzk3MzU5NzE1BGdycElkAzIxNjE0MDc2BGdycHNwSWQDMTcwNjA1ODAzNwRtc2dJZAMyNTAyNwRzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNDI2NDc4MTM5>
Sun Mar 15, 2015 6:21 am (PDT) . Posted by: bbwrwy
<richarda@perryisp.net?subject=Re%3A%20Oklahoma%20TP%20DX%203%2F15%2F15>
Probably the best morning of the winter here for TP DX.
693 unID (JOAB?) - slight het in KGGF-690 QRM at 1230.
747 JOIB - from 1041 to 1123, barely audible to poor in WSB-750
splatter, briefly peaking to fair at 1044.
774 JOUB - from 0953 to 1247 (LSR at 1241), poor to fair.
828 unID (JOBB?) - slight het in WCCO-830 QRM at 1227.
972 unID (HLCA?) - slight het at 1216.
1053 ROK jammer - poor in XEG-1050 splash at 1219-1221.


Checks of 567, 594, 666, 954, 1134, 1287, 1566, 1575 and 1593
provided no signals.


Receiver: C Crane Skywave (1 kHz bandwidth).
Antenna: Quantum QX+.


Good DX.


Richard Allen,
near Perry OK USA.


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2a New ULR station 3/15/15.
<https://groups.yahoo.com/neo/groups/ultralightdx/conversations/topics/25028;_ylc=X3oDMTJzbTk5dGsxBF9TAzk3MzU5NzE1BGdycElkAzIxNjE0MDc2BGdycHNwSWQDMTcwNjA1ODAzNwRtc2dJZAMyNTAyOARzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNDI2NDc4MTM5>
Sun Mar 15, 2015 6:44 am (PDT) . Posted by: bbwrwy
<richarda@perryisp.net?subject=Re%3A%20New%20ULR%20station%203%2F15%2F15%2E>
Another new station was heard here.


3/15/15
1430 kHz WXNT, Indianapolis IN (5 kW at 1055 km/656 mi). Faded in at 0213
GMT with station slogan "CBS Sports 1430", followed by CBS Sports Radio
talk, fading away beneath XEWD at 0215. Returned briefly at 0221-0225. Poor
signal strength. ULR station #1054 (barefoot #1054).


Receiver: C Crane Skywave (barefoot).


Yesterday I incorrectly reported XEQI as XEQT and it was station #1053. I
apologize for my proof reading errors.


Good DX.


Richard Allen,
near Perry OK USA.


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2b Re: New ULR station 3/15/15.
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Sun Mar 15, 2015 6:59 am (PDT) . Posted by: bbwrwy
<richarda@perryisp.net?subject=Re%3A%20New%20ULR%20station%203%2F15%2F15%2E>
I did it again, WXNT is actually barefoot station #1041.

Richard Allen.
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2c Re: New ULR station 3/15/15.
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Sun Mar 15, 2015 9:29 am (PDT) . Posted by: "Allen Willie"
vo1_001_swl
<vo1_001_swl@yahoo.ca?subject=Re%3A%20New%20ULR%20station%203%2F15%2F15%2E>

Richard,
Congrats on another new Ultralight catch for your logbook. Glad to see
you're on a bit of a roll again lately pulling in those new ones.
Ironically, I was on a roll late last summer with new additions to the ULR
log , then it seems to level off in the second half of October which is
usually prime DX time here.
Ever since then it's been an occasional one here and there for me .
Usually February and March I can hear more South American stations ,
however it hasn't turned out that way this year so far.
That's AM (Medium Wave DXing ) You never know what to expect.
Keep those new ULR catches coming Richard,
Good DX
Allen WillieCarbonear, Newfoundland

On Sunday, March 15, 2015 11:29 AM, "richarda@perryisp.net
[ultralightdx]" <ultralightdx@yahoogroups.com> wrote:


I did it again, WXNT is actually barefoot station #1041.
Richard Allen. #yiv7802288238 #yiv7802288238 -- #yiv7802288238ygrp-mkp
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2d Re: New ULR station 3/15/15.
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Sun Mar 15, 2015 10:16 am (PDT) . Posted by: bbwrwy
<richarda@perryisp.net?subject=Re%3A%20New%20ULR%20station%203%2F15%2F15%2E>
Allen:

I didn't do much domestic DXing during the autumn and deep winter,
concentrating more on TP DX. So i don't have anyone to blame but myself.


Richard.
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3a Recording DX
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Sun Mar 15, 2015 7:40 am (PDT) . Posted by:
<theboyd@flash.net?subject=Re%3A%20Recording%20DX>
I have rediscovered MW DX after moving from the US to Perth in Western
Australia. A good bit of the interesting stuff I can hear is in languages I
don’t speak so would like to do some recording to play back (I’ve also been
enjoying the recordings from Gary and others on here). Back in the day,
recording my DX was a matter of holding a cassette recorder up to the
speaker, but I’m guessing better alternatives exist nowadays! At the moment
I’m using a Sangean PR-D5. Thoughts anyone? Thanks, Jim
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3b Re: Recording DX
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Sun Mar 15, 2015 8:21 am (PDT) . Posted by: bbwrwy
<richarda@perryisp.net?subject=Re%3A%20Recording%20DX>
Jim:

What DX stations can you hear? I'm sure you hear Indonesia.
While haven't heard any audio from any stations DU, I have
occasionally heard the carrier signal of 2BL-702. I've also carriers
of 3LO-774 and 5AN-891.


Good DX.



Richard Allen,
near Perry OK USA.
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3c Re: Recording DX
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Sun Mar 15, 2015 8:11 pm (PDT) . Posted by: jimbperth
<theboyd@flash.net?subject=Re%3A%20Recording%20DX>
Hi Richard,


I grew up in Tulsa, went to OSU, so am familiar w/your area. Pretty
impressive that you're hearing TP's and DU carriers from that far inland.
Back in the 70's when I was in Tulsa I heard South Am and Caribbean, and a
couple of TA's and that's it.


Perth is a pretty amazing place to DX. We're on the west coast so by an
hour or so before sunrise, all the Eastern States are in full daylight
(there are no real population centers between here and Adelaide, 1,500+
miles east). In the predawn hours in the winter, several ME stations (Farda
1575, Kuwait 1548, Saudi 1440 etc.) are common before all the Phillipines/
China/Indonesians start signing on. One of the more surprising regulars
is VOA Sao Tome 1530, 600kw from over 8,000 miles (probably directional my
way). This with only the Sangean portable and a small inductive loop.


As I mentioned in the first post, my biggest problem is IDing the SE
Asians/Indo's, etc. without knowing the languages (or being able to
differentiate between them in some cases).


Jim

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3d Re: Recording DX
<https://groups.yahoo.com/neo/groups/ultralightdx/conversations/topics/25040;_ylc=X3oDMTJzbmMwOGIzBF9TAzk3MzU5NzE1BGdycElkAzIxNjE0MDc2BGdycHNwSWQDMTcwNjA1ODAzNwRtc2dJZAMyNTA0MARzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNDI2NDc4MTM5>
Sun Mar 15, 2015 8:52 pm (PDT) . Posted by: "Tony Magon" tonymagon
<temagon@gmail.com?subject=Re%3A%20Recording%20DX>
Hi Jim

I have been Asian mw dxing for many years. I visit southern China every two
years or so. For any Asian unids - send me a recording if possible or a
list of unids and times and will try and help you. I am located in Sydney.
Please give me your mobile phone number and I will contact you direct. My
mobile number is 0422 888 939

Regards

Tony Magon. VK2IC

Sydney
On Mar 16, 2015 2:11 PM, "theboyd@flash.net [ultralightdx]" <
ultralightdx@yahoogroups.com> wrote:



Hi Richard,


I grew up in Tulsa, went to OSU, so am familiar w/your area. Pretty
impressive that you're hearing TP's and DU carriers from that far inland.
Back in the 70's when I was in Tulsa I heard South Am and Caribbean, and
a
couple of TA's and that's it.


Perth is a pretty amazing place to DX. We're on the west coast so by an
hour or so before sunrise, all the Eastern States are in full daylight
(there are no real population centers between here and Adelaide, 1,500+
miles east). In the predawn hours in the winter, several ME stations
(Farda 1575, Kuwait 1548, Saudi 1440 etc.) are common before all the
Phillipines/China/Indonesians start signing on. One of the more
surprising
regulars is VOA Sao Tome 1530, 600kw from over 8,000 miles (probably
directional my way). This with only the Sangean portable and a small
inductive loop.


As I mentioned in the first post, my biggest problem is IDing the SE
Asians/Indo's, etc. without knowing the languages (or being able to
differentiate between them in some cases).


Jim

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3e Re: Recording DX
<https://groups.yahoo.com/neo/groups/ultralightdx/conversations/topics/25041;_ylc=X3oDMTJzNHZmMDhpBF9TAzk3MzU5NzE1BGdycElkAzIxNjE0MDc2BGdycHNwSWQDMTcwNjA1ODAzNwRtc2dJZAMyNTA0MQRzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNDI2NDc4MTM5>
Sun Mar 15, 2015 8:55 pm (PDT) . Posted by: "Tony Magon" tonymagon
<temagon@gmail.com?subject=Re%3A%20Recording%20DX>
Sorry. Sent to the list in error instead of direct

Tony Magon
On Mar 16, 2015 2:52 PM, "Tony Magon" <temagon@gmail.com> wrote:

Hi Jim

I have been Asian mw dxing for many years. I visit southern China every
two years or so. For any Asian unids - send me a recording if possible
or a
list of unids and times and will try and help you. I am located in
Sydney.
Please give me your mobile phone number and I will contact you direct. My
mobile number is 0422 888 939

Regards

Tony Magon. VK2IC

Sydney
On Mar 16, 2015 2:11 PM, "theboyd@flash.net [ultralightdx]" <
ultralightdx@yahoogroups.com> wrote:



Hi Richard,


I grew up in Tulsa, went to OSU, so am familiar w/your area. Pretty
impressive that you're hearing TP's and DU carriers from that far
inland.
Back in the 70's when I was in Tulsa I heard South Am and Caribbean,
and a
couple of TA's and that's it.


Perth is a pretty amazing place to DX. We're on the west coast so by an
hour or so before sunrise, all the Eastern States are in full daylight
(there are no real population centers between here and Adelaide, 1,500+
miles east). In the predawn hours in the winter, several ME stations
(Farda 1575, Kuwait 1548, Saudi 1440 etc.) are common before all the
Phillipines/China/Indonesians start signing on. One of the more
surprising
regulars is VOA Sao Tome 1530, 600kw from over 8,000 miles (probably
directional my way). This with only the Sangean portable and a small
inductive loop.


As I mentioned in the first post, my biggest problem is IDing the SE
Asians/Indo's, etc. without knowing the languages (or being able to
differentiate between them in some cases).


Jim

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4a Puyallup, WA Ultralight TP's for 3-15
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Sun Mar 15, 2015 9:29 am (PDT) . Posted by: dxergary
<D1028Gary@aol.com?subject=Re%3A%20Puyallup%2C%20WA%20Ultralight%20TP%27s%20for%203-15>

Hello All,

Thanks to Richard and Brian for their TP reports this morning-- always an
interesting comparison. It was another wild and wacky session this morning,
despite a pretty late start time (1310). Low band Korean and Chinese
stations were fighting it out on 603 and 657, with 738-BEL2 also managing
good audio early on.

At my 1310 start time the Japanese big guns on 594, 693, 747, 774 and 828
were vibrant, but not quite at yesterday's torrid levels. 972-HLCA also had
S9 peaks in and out, and the high band's 1566-HLAZ's Japanese service was
fairly steady at a good level. Early on the second tier Chinese stations
had some decent propagation, with 738-BEL2's Chinese having good peaks over
the KCBS splatter, and 603-China temporarily dominant on the frequency over
a subdued HLSA. That changed pretty dramatically around 1330, with the KBS2
station pounding in with very good peaks during its classic rock music
(played by the deep-voiced male). 603-China continued to pester HLSA at
times but never regained dominance. 657-Pyongyang was fighting a similar
battle with China (Henan?), but unfortunately dominated the frequency with
its dreary orchestra and spooky female vocals. 603-HLSA had some very
strong peaks this morning, but couldn't quite match the level of 972-HLCA's
bizarre singing practice around 1345. Signals generally tapered off by
1410, ending another interesting session.

603 HLSA Namyang, S. Korea "More Than a Feeling' (that there's Chinese QRM
on the frequency?) with very good peaks at 1330

http://www.mediafire.com/listen/4yrrg2mlbbmcb3i/603-HLSA-1330z031515CCSW.MP3

603 China (Hulun Buir?) Temporarily dominant over HLSA with Chinese female
speech at 1318

http://www.mediafire.com/listen/zye2utbjecay8kb/603-China-1318z031515CCSW.MP3

657 Pyongyang BS Pyongyang, N. Korea Female vocal music accompanied by the
dreary
orchestra holding the edge over a weak China at 1348

http://www.mediafire.com/listen/ejaj944gbm4yftg/657-Pyongyang-1348z031515CCSW.MP3

73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave Ultralight +
15" FSL antenna

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5 Long Term Ultralight DXing Project Results - 15/03/2015
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Sun Mar 15, 2015 1:35 pm (PDT) . Posted by: paulgblundell
<tanger32au@gmail.com?subject=Re%3A%20Long%20Term%20Ultralight%20DXing%20Project%20Results%20-%2015%2F03%2F2015>
Date: 15/03/2015
Time: 13:55 - 14:10
Location: Home, Launceston Tasmania
Weather: Fine and warm, some cloud cover
531 - 3GG: 2
540 - 7SD: 4
549 - 2CR: 1
558 - 7BU: 3
585 - 7RN: 5
621 - 3RN: 5
693 - 3AW: 3
747 - 7PB: 4
774 - 3LO: 4
855 - 3CR: 3
900 - 7AD: 3
954 - 2UE: 1
1008 - HPON (Launceston) : 5
1080 - HPON (Hobart): 3
1116 - 3AK: 1
1179 - 3RPH: 0
1224 - 3EA: 0
1260 - 3SR: 0
1341 - HPON (Geelong): 3
1377 - 3MP: 1
1395 - 5AA: 1
1440 - 1SBS: 1
1503 - 3KND: 0
1593 - HPON (Melbourne): 0

Notes: A good session at home, the first in about a week. Results were as
I would expect with the signals between 1341KHz and 1440KHz being a bit of
a surprise given the time of day and my location.


Paul
http://ultralightdxing.blogspot.com.au/
http://ultralightdxing.blogspot.com.au/



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6 New Zealand Stations - MIA?
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Sun Mar 15, 2015 2:14 pm (PDT) . Posted by: paulgblundell
<tanger32au@gmail.com?subject=Re%3A%20New%20Zealand%20Stations%20-%20MIA%3F>
A couple of weekends ago my wife, daughter and I spent a weekend down
at St Helens on the east coast of Tasmania, (
http://ultralightdxing.blogspot.com.au/2015/03/ultralight-dxing-st-helens-2722015.html).
At the time I reported that New Zealand stations were missing from the
band, at the time I was not sure of the reason for this, at the time I had
not been doing much "pure" DXing before hand, instead my focus had been my
long term ultralight dxing project.


Over the past two weeks I have been checking the band for New Zealand
stations at various times between just before my local sunset to just after
my local sunrise, this has been at many different times during this period
to make sure that local conditions were not causing any issues.


Sadly I have not been able to log any New Zealand stations at anything
more than a very poor signal level, this is with both my 7.5" loop stick
PL-380 and Digitech AR-1733. In the past both of these radios have produced
much better results. At times even the basic AR-1733 has produced reliable
results on 1386KHz.


I doubt both my receivers would have developed faults at the same time and
all my Australian results are comparable to "normal". I suspect a change
at the transmitters end (doubtful for multiple stations) or RF atmospheric
conditions are not allowing these stations to be received. I shall
undertake more research and post more results as I log them.


Paul



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7a Kchibo antenna experiments installment 2
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Sun Mar 15, 2015 4:15 pm (PDT) . Posted by: "Phillips" sunumabidge
<phillicom@hotmail.com?subject=Re%3A%20Kchibo%20antenna%20experiments%20installment%202>
While waiting for parts to continue my ferrite antenna experiments, I
thought that I would use the Kchibo radios in a series of tests using an
existing 2 foot tuned box loop.

The loop is a square wooden frame wound with 11 turns of light gauge
hookup wire spaced 7mm between turns. It is tuned by an ex-iron-curtain air
variable with a 4:1 reduction gear. It has a 1 foot (1/4 area) pickup loop
suspended in one corner by fishing line. My math gives this pickup loop a
1936:1 impedance ratio. If my math is wildly off, please, I would like to
know.

The Kcihbos were first tested magnetically coupled by placing the radios
inside the loop 25mm from the windings. Then by two 5 turn windings, one at
each end of the 200mm ferrite rod. The turn coupling tests used one winding
alone and then with its phase reversed and then two-coil series and
parallel tests both in and anti-phase.

Efforts were made to distance and orient the radios to minimise incidental
coupling with the loop or transmitter but, without a magnetically screened
lab, the results are real world - probably more relevant anyway.

The three transmitters are distant and use different power outputs and so
the results cannot be compared station-to-station. Only method-to-method
comparisons have any value. The 1485 station is only 200 watts and is
roughly as distant as the 1044 which is 2KW - that's why the 1485 figures
are always low. The 639 station is 5KW but is further.

Results (dBu):

Coupling method Fo 639 1044 1485

Barefoot (no loop) 35 30 20
Barefoot - magnetically coupled 63 54 35

200mm standalone (no loop) 65 54 37
200mm magnetically coupled 72 64 38
200mm single winding 69 50 35
200mm single winding reverse phase 56 44 32
200mm double winding parallel in phase 57 47 30
200mm double winding parallel anti-phase 54 46 31
200mm double winding serial in phase 58 48 30
200mm double winding serial anti-phase 55 50 32

Conclusions.

1. Magnetic coupling offers the best signal.
2. Magnetic coupling to the 200mm ferrite is better than to the internal
ferrite.
3. When winding coupled, phasing can influence performance.
4. Phasing effects are influenced by the frequency.


Subjective:

I was surprised by the magnetically coupled figures. When listening
without measuring, I thought that the standalone 200mm ferrite had the
better performance. It may have a better signal-to-noise ratio - more
investigation needed - backburner for that one.

At times I had difficulty hearing when the loop was at resonance,
especially at the lowest frequency. This may be due to the inherent
"bandspread" of the air variable at the bottom end. It may be that the
signal was getting strong enough to start to saturate the AGC. Perhaps the
resonating ferrite antenna of the radio was interacting back with the loop,
I don't know - another for the backburner.


All in all, I had fun chasing these results. They also give me another
benchmark against which to compare a later series of ferrite antenna tests.
The audio attenuator is nearly complete now and so I will repeat my first
ferrite test to collect the audio before moving on to the next in the
series of antennas.



Ray
35S138E


COLEMAK The keyboard layout for rational thinkersAvailable for Windows,
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7b Re: Kchibo antenna experiments installment 2
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Sun Mar 15, 2015 5:31 pm (PDT) . Posted by: farmerik
<farmerik@cox.net?subject=Re%3A%20Kchibo%20antenna%20experiments%20installment%202>
Thanks, I am eager to follow your work closely. I did some antenna
experiments a few years ago, and use the RSSI readings to compare. As I
went along, I paid more attention to the S/N ratio than the signal
strength. I am unfamiliar with your radio, which may not show S/N. I used
TECSUN models. The digital readout gives an instant number for comparison
so you can quickly change to something else before reception conditions
change much. Thanks for sharing your results here, - FARMERIK CT USA
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