Date   

MW-Ultralight log

patrice.privat
 

Good Evening,
 
Tonight's log :
 
1550 RASD Tindouf, ALG, Arabic ulr #300
 
603 RNE5 TN , E, Spanish ulr #301
 
1197 Euzkadi Irratia, E, Basque ulr #302
 
Cheers de Pat
 
(Beauvais)
 
 


Re: BOGs and Flags

G3ROO <ian.g3roo@...>
 

Hi Kaz..... very interesting....
 
My interest is 160m Dx so Flags, BOGs and Bevs are the order of the day!
 
Bev's are out of hte question as, although I have 2 acres of land it is down to a small caravan site and so difficult..
 
I have a 40 ft tower and,until today, had a 40ft boom flag on it..... worked well giving a 2dB advantage s/n ratio over the main aerial but rather broad in the beam.
 
Playing around with EZNEC I found that I could narrow the beamwidth by 50% with a considerably better f/b ratio by using two amaller loops phased on the same boom.
 
Today we built it and have found that the setup is very sensitive indeed.   The tower was upand down like a Yoyo..... and we're shattered!
 
Termination is very critical and now I am going to make some LDR and lamp units up so we can adjust the termination from the ground and then replace with fixed resistors later.
 
We've got 15dB f/b at present with a 3db beamwidth of 110 degrees.... that seems fixed, but if we can get the f/b in the order of 30dB as Eznec predicts I will be a very happy bunny!
 
I find playing with the aerials almost as much fun as getting the Dx!
 
Ian
 
 

----- Original Message -----
From: neilkaz
Sent: Monday, October 31, 2011 7:12 PM
Subject: [ultralightdx] Re: BOG antennas

 

Ten years ago I laid down my first real BOG, 625 ft due west from here 35 miles NW of Chicago. In contrast to the elevated mini-Bev it replaced it had considerably better directivity and was a considerably better DX antenna except on the very high end of BCB, where 625 ft is a reasonable length for a Bev, and where BOG's start becoming somewhat lossy at that length. A few examples of daytime reception on my initial BOG... 540 KWMT was loud, 570 WNAX which I could barely tell it was there on previous antennas was quite listenable. Even 880 KRVN was generally audible weakly. I was happily amazed and sunset and nightime DXing also didn't disappoint.

Typically I terminate BOGs to ground with something on the order of 230 to 270 ohms. The termination is not broadbanded and only provides a decent F/B improvement over some of the band. I've sometimes added some series L (10 to 25 turn handmade coils, wires around a toilet paper tube or paper towel tube) to try to better tune the Rt to frequencies of interest. Basically this is a black art and done empirically. If you want to try to terminate a BOG, experiment. I find that a 5 foot section of 1 in copper pipe (the thicker walled kind so it doesn't buckle much when driven into ground) provides a good contact to ground and I prefer it to a solid thinner typical 8 ft rod as I think there's more surface area incontact with ground.

For any quickish DXped I don't worry about termination and phase one // BOG vs another shorter one, typically 100 to 200 feet shorter. Using the Quantum Phaser this typically gives me great back nulls across about 200 KHz (sometimes more).

BOGs have some built in F/B. However, I've never experienced anything nearly as extreme as Rick did with his R75 and 30 ft wires. Here's a link to some measurements I made from both ends of a rather long unterminated BOG.

http://www.dxing.info/community/viewtopic.php?f=17&t=371

I have experienced exactly the same effect at my rural DX site in Grafton WI.

Phased BOGs changed the hobby for me, due to the more narrow beamwidth than can be obtained when using a flag type antenna, such as a KAZ antenna, and the nice F/B when compared to a typical small loop figure 8 pattern (like ULR internal loopsticks) which while having great side nulls, has no F/B.

Over the next couple of weeks I'll reply to some of the BOG posts here, mentioning my experiences from the past decade.

73 KAZ Barrington IL/Grafton WI


Re: The Green Giant

Paul V Birke PEng <nonlinear@...>
 


> When I first published my notes I was falsely accused of plagiarising the work of Polydoroff (I cannot copy something I did not know existed), besides I had thought this sleeve arrangement out as an inductor for electrostatic discharge transduction into electric-magnetic energy transformations and transduction - not for electromagnetic transduction which it additionally proves to be good for.
>
> Cheers ........... Graham.
********************************************************

Dear Graham

I only pointed out that the patent existed well before your discovery.
that is all, nothing more

best wishes
Paul V Birke VE3PVB



Re: BOG antennas

neilkaz <neilkaz@...>
 

Ten years ago I laid down my first real BOG, 625 ft due west from here 35 miles NW of Chicago. In contrast to the elevated mini-Bev it replaced it had considerably better directivity and was a considerably better DX antenna except on the very high end of BCB, where 625 ft is a reasonable length for a Bev, and where BOG's start becoming somewhat lossy at that length. A few examples of daytime reception on my initial BOG... 540 KWMT was loud, 570 WNAX which I could barely tell it was there on previous antennas was quite listenable. Even 880 KRVN was generally audible weakly. I was happily amazed and sunset and nightime DXing also didn't disappoint.

Typically I terminate BOGs to ground with something on the order of 230 to 270 ohms. The termination is not broadbanded and only provides a decent F/B improvement over some of the band. I've sometimes added some series L (10 to 25 turn handmade coils, wires around a toilet paper tube or paper towel tube) to try to better tune the Rt to frequencies of interest. Basically this is a black art and done empirically. If you want to try to terminate a BOG, experiment. I find that a 5 foot section of 1 in copper pipe (the thicker walled kind so it doesn't buckle much when driven into ground) provides a good contact to ground and I prefer it to a solid thinner typical 8 ft rod as I think there's more surface area incontact with ground.

For any quickish DXped I don't worry about termination and phase one // BOG vs another shorter one, typically 100 to 200 feet shorter. Using the Quantum Phaser this typically gives me great back nulls across about 200 KHz (sometimes more).

BOGs have some built in F/B. However, I've never experienced anything nearly as extreme as Rick did with his R75 and 30 ft wires. Here's a link to some measurements I made from both ends of a rather long unterminated BOG.

http://www.dxing.info/community/viewtopic.php?f=17&t=371

I have experienced exactly the same effect at my rural DX site in Grafton WI.

Phased BOGs changed the hobby for me, due to the more narrow beamwidth than can be obtained when using a flag type antenna, such as a KAZ antenna, and the nice F/B when compared to a typical small loop figure 8 pattern (like ULR internal loopsticks) which while having great side nulls, has no F/B.

Over the next couple of weeks I'll reply to some of the BOG posts here, mentioning my experiences from the past decade.

73 KAZ Barrington IL/Grafton WI


Re: The Green Giant FSL

Kevin Schanilec
 

Hi Michael:

Thanks - my wife thinks it's rather amusing, actually (after all, there are many worse things one's spouse can get up to...), as long as the construction mess and debris don't pose a hygeine problem or trip hazard :-)

Kevin

--- In ultralightdx@..., "Michael" <michael.setaazul@...> wrote:

Very impressive, Kevin.

Of course I mean : the serenity of your wife!

The next stage would be to build one of similar
dimensions round the inside of a weekend
suitcase - but maybe not for air travel :-)

Michael UK


Re: The Green Giant

Kevin Schanilec
 

Thanks Graham for your comments, as well as initially triggering this avalanche of antenna fun. I have indeed thought about tapping off with sense turn to see if radio placement is more easily accomplished. I believe it was Everett who mentioned that he used a single turn of regular wire, fed to a 3:1 transformer (9:1 impedance ratio) to feed a communications receiver, and it worked just fine and didn't load the FSL down. I hope to tinker with a sense turn (or maybe a ferrite coupler) in the coming days.

On MW, this is still well short of the point of diminishing returns, as it has a definite advantage over a 12-inch FSL. The advantage is most noticeable on the lower end of the band, as one might expect. As to whether it can drive a crystal set, I haven't ever delved into that part of the hobby, but hopefully someone will eventually do some testing.

Kevin

--- In ultralightdx@..., "Graham" <graham.maynard1@...> wrote:

WOW
what an example of an FS Loop !

( Watch out in case the security forces think you have some nuclear weapons or EMP devices there Kevin ! )

Wonder if you have yet tried a single turn of coax as a coupling lead, with its inner connected to screen at the turn end as the take off loop ?
Then wrap say 2 turns of any wire around an Ultralight and connect those to the other end of your coax to couple it without having to place the radio in some awkward position.

That GG size of FSL might be pushing past the efficiency limit for wire loops at MW, because larger and much more inconvenient wire loops must have fewer turns
and then end up approaching broadband characteristics, with less ability to couple well without additional tuned circuits or amplification.

Also I wonder if your Green Giant will drive a germanium diode plus sensitive telephone-type headphones directly - as a crystal set.

Between yourself and Gary I guess you have covered most options between small slabs an longer rods. A shootout to investigate which shape of ferrite is more economical should be most worthwhile.

When I first published my notes I was falsely accused of plagiarising the work of Polydoroff (I cannot copy something I did not know existed), besides I had thought this sleeve arrangement out as an inductor for electrostatic discharge transduction into electric-magnetic energy transformations and transduction - not for electromagnetic transduction which it additionally proves to be good
for.

Cheers ........... Graham.


The Green Giant

graham.maynard1
 

WOW
what an example of an FS Loop !

( Watch out in case the security forces think you have some nuclear weapons or EMP devices there Kevin ! )

Wonder if you have yet tried a single turn of coax as a coupling lead, with its inner connected to screen at the turn end as the take off loop ?
Then wrap say 2 turns of any wire around an Ultralight and connect those to the other end of your coax to couple it without having to place the radio in some awkward position.

That GG size of FSL might be pushing past the efficiency limit for wire loops at MW, because larger and much more inconvenient wire loops must have fewer turns
and then end up approaching broadband characteristics, with less ability to couple well without additional tuned circuits or amplification.

Also I wonder if your Green Giant will drive a germanium diode plus sensitive telephone-type headphones directly - as a crystal set.

Between yourself and Gary I guess you have covered most options between small slabs an longer rods. A shootout to investigate which shape of ferrite is more economical should be most worthwhile.

When I first published my notes I was falsely accused of plagiarising the work of Polydoroff (I cannot copy something I did not know existed), besides I had thought this sleeve arrangement out as an inductor for electrostatic discharge transduction into electric-magnetic energy transformations and transduction - not for electromagnetic transduction which it additionally proves to be good
for.

Cheers ........... Graham.


Re: The Green Giant FSL

Mark/airchecklover
 

Super-ingenious Kevin. Thanks for posting.
+++++++++++++++++++++++++++++++++++++++++++++++

--- In ultralightdx@..., "dhsatyadhana" <dhsatyadhana@...> wrote:

Hi all:

I finally was able to assemble an antenna I have been working on for some time, a 22" (coil size) FSL, dubbed The Green Giant. Housed in a 24-inch diameter holiday wreath box, it tunes the full LW and MW spectrum in three bands. Being perhaps the largest FSL in the world (so far), it has the signal-grabbing power to match.

The file "Green Giant FSL Summary.pdf" is now in the Files section here, in the "Ferrite Sleeve Loop Antenna" folder, if you want to take a look. It is more of a summary rather than a detailed construction blueprint – Gary's recent guide is the gold standard as far as a detailed step-by-step manual for building an FSL. However, hopefully it gives you a clear idea of how it was built, and feel free to drop me a line with questions if you embark on building one!

Some things learned in building this beast:
- loop antenna theory, which predicts that signal is generally proportional to turns-times-area, seems to be holding true
- the distributed capacitance becomes a very significant factor in an FSL this large, even with Litz wire. As a result, I needed to allow for three separate tuning bands and throw in extra capacitance. To go much larger than this (my wife is wincing...), I will probably have to stick with either MW or LW only
- as with the Backpack FSL that I posted a couple days ago, shorter (and cheaper) ferrites, in this case 62x12x4 mm bars, continue to work just fine. Since the coil is much narrower on a large FSL, there is plenty of room for the winding, even for LW, although longer ferrites would allow for more space between windings, decreasing the distributed capacitance

I hope to have some decent weather in the next few days in order to do some testing out in the park, since being indoors with all the metal and other interference hampers the performance of FSLs. However, even with the handicap of being indoors, this looks to be the next Giant step beyond even the 11-12 inch FSLs currently in existence.

Kevin S
Bainbridge Island, WA


Re: Sudden very weakaudio on my modified PL-380

gordstaples49
 

I had a similar problem with my PL390. The volume was lower than normal and when turned up past about the 10 volume setting became very distorted. It turned out that there is a tiny FET which switches power on/off to the audio chip (right near pin 16 on the chip) that had blown only allowing a very low voltage (something like 2V) to power the audio. Replaced this and everything was fine again.

Regards
Gord

--- In ultralightdx@..., Patrick <aunumero73@...> wrote:

No, the battery is OK.
I noticed that the audio volume is actually fine when using headphones,
only very low when listening through the speaker.


Re: Three new Stations WLAT off-air

ferrite61 <dxrx@...>
 

An update here... WXCT 990 Southington, CT is also off-air, but WQUN 1220 is still on. Hamden/New Haven reletively unaffected, My town Cheshire and North wiped out. WPOP 1410 Hartford (B'cast Ant. Newington) was off air for quite a bit, but is on again. Phone service here only, everything on UPS device, including sharging celphones. Gotta go TC all will check in again soon.

Paul S. in CT

--- In ultralightdx@..., "ferrite61" <dxrx@...> wrote:

Tonite during DXing I noted that WLAT 910 Hz from New Britain, CT was off-air likely due to the nor'easter dumping a foot plus in the area.

I was able to find two new stations with the channel clear.

First was a nice callsign of WJCW from Johnson City, TN just after 2330 EDT. A lookup indicated ESPN programming, and in about 45 minutes WJCW came to the top rather well with "All-Night" show. Good copy for about 10 minutes, including a second call.

I moved up the band to try 1240 in case WWCO was having problems... they were not, but nulled them to see what was there tonight. I got some standards from 50's 60's, in/out for a while and heard a call for WFTN[M]. THis was a problem, as both WFTN and WFTM are both listed as "Adult Standards" one in NH, and the other in MD. Had to stay on this longer than I wanted, but was rewarded with a few local spots for Keene and Manchester. This would be NH, and am logging as WFTN.

For the 0100 EDT ID's I went back to 910 to see if I could pick up any. I did catch a nice 910 WBZU Scranton, and then into what I think is C2C.

There is some singing going on, sounds like Country or maybe S. Gospel, but no ID's.


#512 910kHz WJCW Johnson City TN 1000W 998km using PL-210
#513 1240kHz WFTN Franklin NH 1000W 244km using PL-210
#514 910kHz WBZU Scranton PA 440W 230km using PL-210

WFTN is also GY #61.

Happy listening!, from snowbound/ crackling trees CT

Paul S. in CT


Newfoundland Ultralight Radio Trans-Atlantics & Domestics Report Oct 28-31

Allen Willie
 

Ideal propagation conditions prevailed during the weekend with the solar indicators at zero and zero early on , however the lower end of the band seemed to be somewhat suppressed compared to the higher end. A good variety of countries heard including the Vatican logged by Dianne for the very first time at this new location.




549-ALGERIA-Alger Chaine 1 Les Trembles 2:04 UTC Oct 31 Arabic music & talk
558-SPAIN-R. Nacional various 23:37 UTC Oct 28 woman in Spanish talk
612-MOROCCO-RTM Sebaa-Aioun 22:22 UTC Oct 28 woman in Arabic, mention of Morrocaine (Fair)
621-CANARY ISLANDS-R. Nacional, Tenerife 2:02 UTC Oct 31 woman with news in Spanish
684-SPAIN-Radio Nacional 1 Sevilla 2:05 UTC Oct 31 Spanish commentary
837-SPAIN-COPE Sevilla 23:38 UTC Oct 28
855-SPAIN-R. Nacional, various 20:34 UTC Oct 30 Spanish talk (Good)
909-ENGLAND-BBC 5 Live, Moorside Edge 00:09 UTC Oct 31 talk (good)
963-TUNISIA-R. Tunisia Cultural Channel, Tunis 22:11 UTC Oct 28 Chants
999-SPAIN-COPE Madrid 20:02 UTC Oct 29 Sports commentary in Spanish
1035-PORTUGAL-Star FM Belmonte 2:00 UTC Oct 31 Star FM ID Jingle, Cat Stevens song
1062-ITALY-RAI1 Cagliari 20:08 UTC Oct 29 Italian talk & music
1089-ENGLAND-Talksport Radio, Brookmans Park 00:11 UTC Oct 31 ID then talk about Vincent Price
1098-SPAIN-R. Nacional 5, various 22:20 UTC Oct 28 Spanish political talk
1116-SPAIN-SER Pontevedra 20:31 UTC Oct 30 Spanish sports commentary
1134-CROATIA-Glas Hrvatske, Rasinovac 22:16 UTC Oct 28 news in English (Very Strong)
1197-SPAIN-Euskadi Irratia, Vitoria 1:02 UTC Oct 29 news in Basque language
1242-FRANCE-France Info Marseille Cabries-Realtor 23:40 UTC Oct 28 French talk (Very Strong)
1251-LIBYA-Voice of Africa, Tripoli 19:40 UTC Oct 29 man in Arabic talk (Very Good)
1305-SPAIN-R. Nacional, various 20:30 UTC Oct 29 news in Spanish (good)
1314-UNITED ARAB EMIRATES-R. Farda, Al-Dhabbiya 00:07 UTC Oct 31 Arabic talk & music (Very Strong)
1341-NORTHERN IRELAND-BBC R. Ulster, Lisnagarvey 21:40 UTC Oct 28 ID, Elvis song "Suspicious Minds"
1377-FRANCE-France Info, Lille-Camphin-en-Carembault 23:33 UTC Oct 28 French talk, ID (Like A Local)
1395-ALBANIA-Transworld Radio via Fllake Relay 20:03 UTC Oct 30 Polish programme (This one was very strong all evening)

1413-SPAIN-R. Nacional, Jaen 21:44 UTC Oct 28 Spanish talk (Strong)
1422-ALGERIA-R. Culture, Alger 22:34 UTC Oct 28 man & woman in Arabic (good) at times over Germany the past few evenings)
1431-DJIBOUTI-R. Sawa, Arta 23:31 UTC Oct 28 Katy Perry song, Arabic talk, ID
1440-SAUDI ARABIA-General Arabic Programme, Dammam 21:42 UTC Oct 28 Arabic talk over CRI Relay Luxembourg at times)
1449-LIBYA-Voice of Free Libya, Meserata 19:42 UTC Oct 29 Arabic talk (good)
1458-ALBANIA-China Radio via Fllake Relay 20:02 UTC Oct 30 Hungarian lang. programme
1467-FRANCE-Transworld Radio via Romoules 20:20 UTC Oct 29 Religious talk in French & Englsih (good)
1485-SPAIN-SER various 21:43 UTC Oct 28 Spanish talk (Strong)
1494-FRANCE-France Bleue, Bastia 00:15 UTC Oct 31 France Bleue ID Jingle, American pop song then French song (good)
1503-IRAN-IRIB1 Bushehr, 00:12 UTC Oct 31 Chants
1521-SAUDI ARABIA-BSKSA Duba 00:53 UTC Oct 29 Arabic talk (Like A Local)
1530-VATICAN STATE-Vatican Radio 19:55 UTC Oct 30 Religious ceremony then into Interval signal & then Italian language programming (good) **NEW**(DF-BH)
1550-WESTERN SAHARA-R. Democratic Sahara Rep, Rabuni 20:12 UTC Oct 30 Arabic talk (fair with good peaks)
1557-FRANCE-France Info, Nice-Fontbonne 20:06 UTC Oct 29 French talk & promos
1575-ITALY-RAI1 Genova 20:14 UTC Oct 30 Italian talk & American pop song
1584-SPAIN-SER various 20:15 UTC Oct 29 Sports commentary in Spanish (good)
1602-SPAIN-Euskadi Irratia, R. Vitoria Cerro Estibaliz 00:14 UTC Oct 31 R. Vitoria ID Jingle, Spanish talk


Receivers: SRF-M37V, SRF-39FP , SRF-59, SRF-M37W , DT-210V barefoot

Good DX

Allen Willie & Dianne Froude
Bristol's Hope,Newfoundland
47:43N 53:11W
http://nldxers.summerhost.info


Re: The Green Giant FSL

Michael <michael.setaazul@...>
 

Very impressive, Kevin.

Of course I mean : the serenity of your wife!

The next stage would be to build one of similar
dimensions round the inside of a weekend
suitcase - but maybe not for air travel :-)

Michael UK


MW-Ultralight logs

patrice.privat
 

Hi
 
1215 Voice of Russia, Bolshakovo, RUS, English ulr #297
 
1224 COPE Valencia , E, Spanish ulr #298
 
585 RTT Gafsa TUN, Arabic // 630 khz ulr #299
 
Good day
 
Patrice
 
Beauvais
 
Tecsun PL-380


The Green Giant FSL

Kevin Schanilec
 

Hi all:

I finally was able to assemble an antenna I have been working on for some time, a 22" (coil size) FSL, dubbed The Green Giant. Housed in a 24-inch diameter holiday wreath box, it tunes the full LW and MW spectrum in three bands. Being perhaps the largest FSL in the world (so far), it has the signal-grabbing power to match.

The file "Green Giant FSL Summary.pdf" is now in the Files section here, in the "Ferrite Sleeve Loop Antenna" folder, if you want to take a look. It is more of a summary rather than a detailed construction blueprint – Gary's recent guide is the gold standard as far as a detailed step-by-step manual for building an FSL. However, hopefully it gives you a clear idea of how it was built, and feel free to drop me a line with questions if you embark on building one!

Some things learned in building this beast:
- loop antenna theory, which predicts that signal is generally proportional to turns-times-area, seems to be holding true
- the distributed capacitance becomes a very significant factor in an FSL this large, even with Litz wire. As a result, I needed to allow for three separate tuning bands and throw in extra capacitance. To go much larger than this (my wife is wincing...), I will probably have to stick with either MW or LW only
- as with the Backpack FSL that I posted a couple days ago, shorter (and cheaper) ferrites, in this case 62x12x4 mm bars, continue to work just fine. Since the coil is much narrower on a large FSL, there is plenty of room for the winding, even for LW, although longer ferrites would allow for more space between windings, decreasing the distributed capacitance

I hope to have some decent weather in the next few days in order to do some testing out in the park, since being indoors with all the metal and other interference hampers the performance of FSLs. However, even with the handicap of being indoors, this looks to be the next Giant step beyond even the 11-12 inch FSLs currently in existence.

Kevin S
Bainbridge Island, WA


Re: CKWX 1130 Made it to Houston!

Stephen Ponder <stephen_ponder@...>
 

Keith,

I don't recall ever having heard CFFR before. But, I now have it in my "Target DX" list!

I didn't hear a "peep" from KWKH on frequency, which is unusual, because they normally have some sort of presence on 1130 down here.

Thanks & 73,

Steve Ponder, N5WBI
Clear Lake City, TX USA
----------------------

On Oct 30, 2011, at 3:30 AM, keith beesley <keith1226@...> wrote:

 

Congrats Steve, they're one of my favorite late-night stations here. I noticed they seemed to have an unusually strong signal tonight. Wonder if that's the furthest south and east they've ever been heard?

Have you heard CFFR ("660 News") from Calgary? Some nights they're even stronger here, despite being further away. Co-owned with CKWX and similar all-news format.

73,
Keith Beesley
Seattle WA USA 


MW-ultralight log

patrice.privat
 

Hi
 
 
945 Gold, Bexhill, G ulr #292
 
1107 Talksport, Lydd, G ulr #293
 
1305 Gold Christchurch, G ulr #294
 
1242 Gold, Hoo St Werburgh, G ulr #295
 
1098 SRo5 Nitra, SVK ulr #296
 
Patrice
 
Tecsun PL-380


Re: Sudden very weakaudio on my modified PL-380

eberhard keller
 

Hello Patrick,my PL-380 went dead shortly,1-2 hours
after completing mod for external 1/8" connector.
Headset volume was fine as you report on yours as well.
I opened the set and removed the main circuit board
enough to touch the speaker terminals with an ohm meter,
open coil on speaker.I found a speaker at a surplus place in milpitas,california,of same mechanical size as the pl-380's,
but 45 ohm.Replaced the speaker,not easy to do and it works
ok.I suspect a bad batch of speakers is possible.

--- In ultralightdx@..., "Patrick " <aunumero73@...> wrote:

Hi all,

This morning, my 7" loopstick PL-380 shows a VERY WEAK audio level. Reception is fine as usual, but I have to set the volume to 20 or 25 to have a decent audio (usually, it is set to abt 7 to 10).

Any idea ?

Patrick, south east France


Re: BOG antennas

Rick Robinson <w4dst@...>
 

Tom and Farmerik,

The BOG, or radial antenna, has apparently not been investigated to determine why a wire on the ground, at a fraction of a wavelength in length, could be directional toward the unterminated end. Maybe someone with antenna modeling software like EZNEC could determine the reason.

My PL-380s are modified with Radio Shack 1/8 mono jacks to accept external antennas on MW, while leaving the internal ferrite bar antenna functional. This weekend I built up an interface box consisting of 2 binding posts and an 1/8 jack for attaching external wire antennas to the PL-380s. Across the binding posts I've installed 2 1N4148 diodes in parallel but reversed polarity and also a Siemens spark discharge tube across the terminals. That will protect the Si4734 chips in the '380s from static discharge. The box cost about $15 and is made from all Radio Shack parts except for the Siemens gas discharge device. This is probably unnecessary but I have a box of them I got at a hamfest for $1 and like to use them rather than have them sitting around.

I have a good lunch time test for the BOG on 1090kHz with 1090 WCZZ in Greenwood, SC, and 1090 WHGG in Kingsport, TN. Again, I'm almost in the direct center of a line between the 2 stations. We have a nice wooded area at the community college where I work with picnic tables to set up on. With the R75 I was able to use the chassis ground on my vehicle but at work I'll be able to use a water faucet pipe that comes out of the ground about 10 feet from the table.

Post your results to the list. BTW, my bogs work well even under snow.

Rick


Re: CKWX 1130 Made it to Houston!

keith beesley
 

Congrats Steve, they're one of my favorite late-night stations here. I noticed they seemed to have an unusually strong signal tonight. Wonder if that's the furthest south and east they've ever been heard?

Have you heard CFFR ("660 News") from Calgary? Some nights they're even stronger here, despite being further away. Co-owned with CKWX and similar all-news format.

73,
Keith Beesley
Seattle WA USA


From: Stephen Ponder
To: ABDX@...; UltralightDX Yahoo Group ; National Radio Club (NRC)
Sent: Sunday, October 30, 2011 12:31 AM
Subject: [ultralightdx] CKWX 1130 Made it to Houston!

 
CKWX 1130 Vancouver, BC, Canada, heard at 0210 CDT on 30-Oct with "News 1130" ID and Traffic/Weather for Vancouver area.
Heard on barefoot DT400W.

73 & Good DX,

Steve Ponder, N5WBI
Clear Lake City, TX USA
----------------------



CKWX 1130 Made it to Houston!

Stephen Ponder <stephen_ponder@...>
 

CKWX 1130 Vancouver, BC, Canada, heard at 0210 CDT on 30-Oct with "News 1130" ID and Traffic/Weather for Vancouver area.
Heard on barefoot DT400W.

73 & Good DX,

Steve Ponder, N5WBI
Clear Lake City, TX USA
----------------------

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