Date   

Re: Thai Score

Gary DeBock
 

Hello David,
 
<<<   Just to add that I had a surprise visit from this station on 28 February 2016 at 22:31 UTC here in Aberdeen, Scotland. I have been testing my new SANGEAN DT-250 and I was sitting on a very busy 1575 kHz in the late evening when suddenly in the midst of the mayhem came the familiar VOA 'Yankee Doodle' sig tune, followed by the VOA voice ID in English. A new programme then started in an UNID language and then quickly faded down never to return. I was assuming it would have been from the Sao Thome transmitter, but Allen Willie pointed out that on 1575 it is from Thailand! Pretty amazing for barefoot!   >>>
 
Wow, congratulations on your reception of 1575-VOA with your new, barefoot Sangean DT-250! That is an amazing reception, not only because of your distance from Thailand but also because most of it s over a land path.
 
Because of its powerful transmitter 1575-VOA is a fairly common catch on west coast ocean beaches here in North America, although the challenge goes up dramatically as you try for it at inland locations with a small portable.
 
<<<   So far, I am really liking the DT-250. Selectivity could be better, but it is streets ahead of my SONY SRF T-615 in that respect and it has given me a heap more pest-free channels.   >>>
 
Yes, selectivity is certainly not a strong point of the SRF-T615. Once I was pretty sure that I had received the Korean language 1566-HLAZ with it-- until I investigated a little further and found that it actually was splatter from my local Korean pest on 1450 :-)
 
73, Gary DeBock (in Puyallup, WA, USA)
 
 

    
 
 

-----Original Message-----
From: davidhenry02@... [ultralightdx]
To: ultralightdx
Sent: Fri, Mar 4, 2016 6:45 am
Subject: [ultralightdx] Re: Thai Score

 
Hi Gary,

Great stuff!!

Just to add that I had a surprise visit from this station on 28 February 2016 at 22:31 UTC here in Aberdeen, Scotland. I have been testing my new SANGEAN DT-250 and I was sitting on a very busy 1575 kHz in the late evening when suddenly in the midst of the mayhem came the familiar VOA 'Yankee Doodle' sig tune, followed by the VOA voice ID in English. A new programme then started in an UNID language and then quickly faded down never to return. I was assuming it would have been from the Sao Thome transmitter, but Allen Willie pointed out that on 1575 it is from Thailand! Pretty amazing for barefoot!

So far, I am really liking the DT-250. Selectivity could be better, but it is streets ahead of my SONY SRF T-615 in that respect and it has given me a heap more pest-free channels.

Cheers,
David Henry
Aberdeen, Scotland.


Re: Newfoundland Ultralight Radio Logs March 2-3

Rik
 

I wonder if the Atlantic to your east helped the signals from Oregon? I used to DX to the north by setting up on the south side of a lake. I never thought to try and see if the lake were 'behind' me, if that would help DXing too. I have found signals to travel along a river better than over land. - FARMERIK


Puyallup, WA Ultralight T's for 3-4

Gary DeBock
 

It was a pretty wild morning for Asian signals, with the low band sounding like something straight out of October. The usual regulars on 594, 693, 747, 828 and 972 all managed good strength at times, while several more obscure stations on 603, 639, 657 and 738 came out of the noise to reach fair levels.
 
My session started at 1410 with the Asian propagation already in full swing. 594-JOAK and 747-JOIB were leading the way with good signals, while both 603-HLSA and 657-Pyongyang (with martial music) were at fair levels. Around 1430 these were joined by 639-CNR1 (poor to fair) and 738-BEL2 (fair), while the Japanese big guns continued their potent runs on 594, 693 and 747. Around 1435 the 558 parallel of 603-HLSA was strong enough to identify with the same K-Pop song, and the 1035-CNR1 synchros showed up with their distinctive echoes. The high band once again featured 1575-VOA as the best performer, with both 1566 and 1593 staying at modest levels during sunrise enhancement.
 
Early on at 1410 I had a chance to record the exact same one minute segment of 594-JOAK on both the 3" FSL Tecsun PL-380 model ("barefoot") and the 7.5" loopstick C.Crane Skywave model inductively coupled to a 15" FSL antenna. The two setups were separated by about 25 feet so that they would not interact with each other. For some bizarre reason the "Science Fiction PL-380" was extremely competitive-- even to a shocking extent. The two one-minute MP3's are linked below.
 
594-JOAK  (3" FSL Tecsun PL-380 model, barefoot)  Japanese male speech at 1410
 
594-JOAK  (7.5" loopstick C.Crane Skywave, inductively coupled to a 15" FSL antenna)  Same Japanese male speech at 1410
 
603-HLSA  Namyang, S. Korea  Korean pop music at 1437 // 558
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave + 15" FSL antenna (except for the first 594 recording)
 
 


Re: Newfoundland Ultralight Radio Logs March 2-3

Allen Willie
 

Hello farmerik


Yes I heard the Oregon station on both the ICOM R-75 as well as the Ultralight machine



73


Allen Willie


Re: Thai Score

Joe
 

Gary,

I am in the process of gathering materials to build the 3 " FSL antenna, I am just wondering where you can buy the Oatey 4x4 foam closet spacers?


Re: Thai Score

David Henry
 

Hi Gary,

Great stuff!!

Just to add that I had a surprise visit from this station on 28 February 2016 at 22:31 UTC here in Aberdeen, Scotland. I have been testing my new SANGEAN DT-250 and I was sitting on a very busy 1575 kHz in the late evening when suddenly in the midst of the mayhem came the familiar VOA 'Yankee Doodle' sig tune, followed by the VOA voice ID in English. A new programme then started in an UNID language and then quickly faded down never to return. I was assuming it would have been from the Sao Thome transmitter, but Allen Willie pointed out that on 1575 it is from Thailand! Pretty amazing for barefoot!

So far, I am really liking the DT-250. Selectivity could be better, but it is streets ahead of my SONY SRF T-615 in that respect and it has given me a heap more pest-free channels.

Cheers,
David Henry
Aberdeen, Scotland.


Re: Puyallup, WA Ultralight TP's for 3-2

Gary DeBock
 

Hi Mark,
 
Thanks for your comments, and analysis of the challenge in reproducing acceptable audio with high-Q tuned circuits.
 
Actually the new, hard-wired FSL antennas have provided much better DX station audio than expected, even in the narrowest (1 kHz DSP) filter selection in the Tecsun PL-380 model. The stark difference in DX station audio fidelity between the hard-wired FSL's and the inductively coupled FSL's has been one of the greatest surprises of the entire experimentation, along with the unusually sharp nulling capability of the hard-wired FSL's. My guess is that the razor-sharp, high-Q tuning system of the inductively coupled FSL's will always have the side effect of cutting off high frequency audio response, similar to the old ceramic filters like the Murata CFJ455K5 (which we used to transplant into the 455 kHz IF Ultralights like the Eton E100 and C.Crane SWP, before Tecsun introduced the Si4734 DSP chips in their pocket radios).
 
Generally speaking, unless a DXer lives in an ideal location such as Newfoundland (or other isolated ocean coast location), high transoceanic DX station audio fidelity is pretty much a luxury that doesn't exist in the pocket radio class, although the new hard-wired FSL antennas come as close as possible in meeting the challenge. Their unique combination of sensitivity and DX station audio fidelity (with 1 kHz DSP filtering) is unprecedented.
 
73 ,Gary DeBock (in Puyallup, WA, USA)
 
 
 
 
    
 
 

-----Original Message-----
From: mdh@... [ultralightdx] <ultralightdx@...>
To: ultralightdx
Sent: Thu, Mar 3, 2016 4:46 am
Subject: Re: [ultralightdx] Puyallup, WA Ultralight TP's for 3-2

 
Hey Gary;

First, compliments on your continued testing and "how to's" for FSL's. 
I continue to follow along, in part to enjoy your excellent work!

Regarding audio frequency response w/ the same type of antenna coupled two different ways to a radio.


Several years ago I notice the same phenomenon using the CCrane Twin Ferrite and coupling it either direct or via an inductive winding.  I'm an audio engineer first, but an RF guy a distant third so I do not know these answers for certain.  However, I have had several years to think about the coupling question and have decided for RF, we may be seeing something similar to what audio ppl started discovering in the 70's .... choice of transformers and capacitors do make a difference in the sound of audio.  This is why  "direct-coupled" or 'DC' circuits (as they were often marketed) became popular.  Over the years quality transformers and capacitors have found their way back into hi-end audio circuits - they do provide benefits and do not degrade 'sonics' if of proper quality (specs).

Switching back to coupling FSL to radio ... My  best guesses are:  (a) There could be an impedance mismatch or a 'circuit effect'  that is acting as a low pass filter when doing inductive coupling.   Or (b)  do you know the rolloff specs of the digital filters?  If they are gradual - for instance, you are using a 1khz filter but if the skirts are say 30db/ as opp to 60db/ at overload - and the direct-coupled antenna is pushing more signal strength into the radio, in effect that will give you a wider RF bandwidth and therefore wider audio frequency range.


AM audio is a favorite subject but I am forever in the "learning" mode so if anyone thinks differently, please speak up!


Regards, Mark


Thai Score

Gary DeBock
 

The attached photo is from the predawn reception of 1575-VOA (Ban Phachi, Thailand) on the "barefoot" 3 inch FSL Tecsun PL-380 Ultralight here in Puyallup, WA, USA this morning. The lady is speaking in Burmese, according to the VOA ID heard at 1430 UTC.
 
 
Fairly common on west coast table receivers and large external antennas during the fall season, at 7,329 miles (11,795 km) the station isn't common at all on hand-held portables at inland west coast locations in the month of March.
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
"Science Fiction PL-380" barefoot
 
 


Re: Newfoundland Ultralight Radio Logs March 2-3

Rik
 

I am REALLY impressed by your logging OREGON from far eastern Canada! Was that barefoot too? - FARMERIK


Re: Newfoundland Ultralight Radio Logs March 2-3

Paul Juarez
 

Nice! 😊 Thank you Allen for the DX reports.
73's
Thank you and best regards,
Paul Juarez
Sent from my HP Slate 7 Extreme Tablet

On Mar 3, 2016 1:23 PM, "vo1_001_swl@... [ultralightdx]" <ultralightdx@...> wrote:
 

Hello To All,


It's been a good week here in the North Atlantic with 4 new additions to the Ultralight radio logbook including Oregon for USA State # 43 heard on Ultralight radio.


1350 khz - WEZS - Laconia, New Hampshire 1:55 UTC  3/2/16 w/ Election primaries talk, then into ads, "Newstalk 1350 WEZS " ID, Fox News and Fox News Radio ID , weather for the Lakes Region, then back into talk show ( signal in the clear then mixing with CKAD Nova Scotia )

Ultralight Station # 1344


1590 khz - WCSL - Cherryville, North Carolina 8:50 UTC 3/2/16 w/ country songs by Blake Shelton and Jamie O'Neal, promo by Mark Miller of Sawyer Brown "You're listening to our kind of Country", Legal ID by man "1590 WCSL" then into Michael Ray song.


Ultralight Station # 1345


1530 khz - WVBF - Middleborough , Massachusetts 23:00 UTC 3/2/16  w/ weather Forecast, mention of Massachusetts , ID and mention of other associated stations, then into talk about Trump , situation in Libya , then talk about EU and economics // tunein(dotcom) web audio feed

Ultralight Station # 1346


1640 khz - KDZR - Lake Oswego, OREGON 7:15 UTC 3/3/16 w/ Talk show with discussion about the Free Masons, then into "Portland's Home For Talk, Talk 16-40", Ad for Gresham Ford, "News, Talk, Business... Talk 1640" ID

Heard coming through weak to fair during WTNI - Mississippi signal fades


  Ultralight Station # 1347



  Receivers:  Sony SRF-M37W and SRF-39FP  barefoot



    Good DX to All,


  Allen Willie VOPC1AA
  Carbonear, Newfoundland
  47'44"15N  53'11"46W
  Grid Square GN37JR  
 


Newfoundland Ultralight Radio Logs March 2-3

Allen Willie
 

Hello To All,


It's been a good week here in the North Atlantic with 4 new additions to the Ultralight radio logbook including Oregon for USA State # 43 heard on Ultralight radio.


1350 khz - WEZS - Laconia, New Hampshire 1:55 UTC  3/2/16 w/ Election primaries talk, then into ads, "Newstalk 1350 WEZS " ID, Fox News and Fox News Radio ID , weather for the Lakes Region, then back into talk show ( signal in the clear then mixing with CKAD Nova Scotia )

Ultralight Station # 1344


1590 khz - WCSL - Cherryville, North Carolina 8:50 UTC 3/2/16 w/ country songs by Blake Shelton and Jamie O'Neal, promo by Mark Miller of Sawyer Brown "You're listening to our kind of Country", Legal ID by man "1590 WCSL" then into Michael Ray song.


Ultralight Station # 1345


1530 khz - WVBF - Middleborough , Massachusetts 23:00 UTC 3/2/16  w/ weather Forecast, mention of Massachusetts , ID and mention of other associated stations, then into talk about Trump , situation in Libya , then talk about EU and economics // tunein(dotcom) web audio feed

Ultralight Station # 1346


1640 khz - KDZR - Lake Oswego, OREGON 7:15 UTC 3/3/16 w/ Talk show with discussion about the Free Masons, then into "Portland's Home For Talk, Talk 16-40", Ad for Gresham Ford, "News, Talk, Business... Talk 1640" ID

Heard coming through weak to fair during WTNI - Mississippi signal fades


  Ultralight Station # 1347



  Receivers:  Sony SRF-M37W and SRF-39FP  barefoot



    Good DX to All,


  Allen Willie VOPC1AA
  Carbonear, Newfoundland
  47'44"15N  53'11"46W
  Grid Square GN37JR  
 


Re: Micro BOG?

Rik
 

I spent a lot of time looking into this and my conclusion is it may well be worth running a BOG as short as 100 to 250 feet for MW to get a low noise antenna. That is very different than what I found online before I started using 500 foot BOGs. By the way, back when I switched from a temporary SE to a permanent ENE, only about 60-70 degrees different in bearing, it changed the transatlantic broadcast stations I heard nearly completely on LW. The BOGs were both 500 feet or 150m and the part of LW I heard broadcasters from is 1500-2000m so they were less than 1/10th wave length. Thanks to all who helped me on this journey. I hope to hear of others getting  good results with micro BOGs.- FARMERIK


Puyallup, WA Ultralight TP's for 3-3

Gary DeBock
 

It was another productive morning for Asian signals, with the Japanese big guns on 594, 693, 747 and 828 once again managing very good signals in and out from 1400-1445. In addition there was a fair low-band presence of Chinese signals on 603 and 639, along with a decent appearance of 1575-VOA around 1430.
 
My session started at 1410 with very good Japanese signals on 594 and 747, along with a similar signal in and out from 972-HLCA (although nowhere near yesterday's awesome level). 603 was all China here this morning, reaching a fair level around 1435 along with a poor to fair signal from 639-CNR1. The CRI stations on 1017 and 1044 also managed ghostly levels in and out, but were nothing to shout about. 1575-VOA was strong enough at 1430 to manage a decent ID on the 3" FSL Tecsun PL-380, while both 1566-HLAZ and 1593-CNR1 stayed at underperforming levels all morning. Overall the session was similar to yesterday's as far as the NHK big gun strength, although there was more of a Chinese presence on other frequencies than yesterday's Korean orientation. Best Asian signal of the session was from 594-JOAK at 1433, reaching a brief excellent level with Japanese conversation.
 
603  China  Hulun Buir?    Chinese female speech with fair peaks around 1435
 
1575  VOA  Ban Rasom, Thailand    Burmese female speech at fair to good level at 1433 (recorded on the
"barefoot" 3" FSL Tecsun PL-380)
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick CC Skywave Ultralight +
15" FSL antenna
 
 


Re: Puyallup, WA Ultralight TP's for 3-2

Mark/airchecklover
 

Hey Gary;

First, compliments on your continued testing and "how to's" for FSL's. 
I continue to follow along, in part to enjoy your excellent work!

Regarding audio frequency response w/ the same type of antenna coupled two different ways to a radio.


Several years ago I notice the same phenomenon using the CCrane Twin Ferrite and coupling it either direct or via an inductive winding.  I'm an audio engineer first, but an RF guy a distant third so I do not know these answers for certain.  However, I have had several years to think about the coupling question and have decided for RF, we may be seeing something similar to what audio ppl started discovering in the 70's .... choice of transformers and capacitors do make a difference in the sound of audio.  This is why  "direct-coupled" or 'DC' circuits (as they were often marketed) became popular.  Over the years quality transformers and capacitors have found their way back into hi-end audio circuits - they do provide benefits and do not degrade 'sonics' if of proper quality (specs).

Switching back to coupling FSL to radio ... My  best guesses are:  (a) There could be an impedance mismatch or a 'circuit effect'  that is acting as a low pass filter when doing inductive coupling.   Or (b)  do you know the rolloff specs of the digital filters?  If they are gradual - for instance, you are using a 1khz filter but if the skirts are say 30db/ as opp to 60db/ at overload - and the direct-coupled antenna is pushing more signal strength into the radio, in effect that will give you a wider RF bandwidth and therefore wider audio frequency range.


AM audio is a favorite subject but I am forever in the "learning" mode so if anyone thinks differently, please speak up!


Regards, Mark


Re: Quick question about the latest FSL antennas for the PL-380

Gary DeBock
 

<<<    One more question (yeah, right, surely this can't be the last :-) ): For any given diameter and/or ferrite bar length, how do you know how many turns of the 250/46 Litz wire to use?    >>>
 
Hi Again Chris,
 
Whenever a new inductively coupled FSL antenna is designed it is always necessary to find the number of coil turns necessary for complete MW band coverage (530-1700 kHz). When the initial FSL antenna model is completed it is a process of trial and error to adjust the number of coil turns, in search of the optimal MW band coverage.
 
For the new, hard-wired FSL's the process is much easier-- simply measure the coil inductance of the first FSL test model and make sure that it is within the recommended limits of the PL-380's Si4734 DSP chip (180-450 uH). As long as the inductance of the first FSL test model is in the middle of this range you then have some leeway in adding and subtracting coil turns for the sake of convenience, since the inductance would still be within acceptable limits. If you wish to maintain the same inductance with a larger coil, simple mathematical formulas are used to calculate the new number of coil turns. The mathematical value of "Pi" (3.141) is used very frequently in FSL design, especially to determine the number of ferrite rods necessary to build the large monster loops while the designs are still on the drawing board.
 
73, Gary DeBock (in Puyallup, WA, USA)
 
 
 
     
 
 

-----Original Message-----
From: ku4a@... [ultralightdx]
To: ultralightdx Sent: Wed, Mar 2, 2016 5:40 am
Subject: Re: [ultralightdx] Quick question about the latest FSL antennas for the PL-380

 
Thanks, Gary. That information is a huge help. We will think about whether or not to contact you about the 100 mm ferrite bars.

One more question (yeah, right, surely this can't be the last :-) ): For any given diameter and/or ferrite bar length, how do you know how many turns of the 250/46 Litz wire to use? 

73
Chris
KU4A


Re: Puyallup, WA Ultralight TP's for 3-2

Michael <michael.setaazul@...>
 

On 03.03.16 02:50, D1028Gary@... [ultralightdx] wrote:

<<< Very well done.. And the audio quality is a lot better. >>>
...
I agree with you about the audio. For some unknown reason, the
hard-wired FSL antennas seem to provide much better audio quality in the
PL-380 (using the 1 kHz DSP setting) than the inductively-coupled FSL's,
which tend to clip off the higher audio frequencies when they provide a
signal boost. It's one more fringe benefit of these new little DX chasers.
73, Gary
------------------------------------------------------
This sounds much like my observation with a single long tuned
ferrite on LW, inductively coupled to the radio. Tuning is very
sharp, so bandwidth is narrowed, cutting off higher audio
frequencies. As it is manually tuned, one can move the passband
across the receive frequency and thereby "recover" the higher audio frequencies on either the usb or lsb. With a PL380 the integral
tuning will counteract this. Hardwiring the FSL into the frontend will
load the tuning coil more than inductive coupling and thereby
widen the passband.

Michael


Re: Puyallup, WA Ultralight TP's for 3-2

Gary DeBock
 

<<<   Very well done.. And the audio quality is a lot better.   >>>
 
Thanks for your comment, Derek!
 
I agree with you about the audio. For some unknown reason, the hard-wired FSL antennas seem to provide much better audio quality in the PL-380 (using the 1 kHz DSP setting) than the inductively-coupled FSL's, which tend to clip off the higher audio frequencies when they provide a signal boost. It's one more fringe benefit of these new little DX chasers.
 
73, Gary
 
 
 
 
  
 
 

-----Original Message-----
From: Derek Vincent mw12voltdx@... [ultralightdx]
To: ultralightdx
Sent: Wed, Mar 2, 2016 3:46 pm
Subject: Re: [ultralightdx] Puyallup, WA Ultralight TP's for 3-2

 
Very well done.. And the audio quality is a lot better.

Thanks

 


On Mar 2, 2016, at 8:54 AM, "D1028Gary@... [ultralightdx]" <ultralightdx@...> wrote:

 
Very good Asian conditions prevailed during sunrise enhancement this morning, with an awesome S9 signal from 972-HLCA around 1415 as the star attraction. 594-JOAK, 693-JOAB, 747-JOIB, 828-JOBB and 1566-HLAZ all managed good signals from 1400-1440, while the KBS2 parallels on 558 and 603 reached fair levels in and out.
The S9+ recording of 972-HLCA linked below was made on the "barefoot" 3" FSL Tecsun PL-380 Ultralight at 1415. A photo of the "Science Fiction PL-380" making this recording of HLCA during the pre-sunrise darkness is posted at https://app.box.com/s/3jelpflsiug7ojkx140tyj5k953y6o3c 
 
972-HLCA  Korean pop music at awesome level at 1415; best Asian signal of the session
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
"Barefoot" 3" FSL Tecsun PL-380 Ultralight
 
 


Re: Puyallup, WA Ultralight TP's for 3-2

Derek Vincent
 

Very well done.. And the audio quality is a lot better.

Thanks

 


On Mar 2, 2016, at 8:54 AM, "D1028Gary@... [ultralightdx]" <ultralightdx@...> wrote:

 

Very good Asian conditions prevailed during sunrise enhancement this morning, with an awesome S9 signal from 972-HLCA around 1415 as the star attraction. 594-JOAK, 693-JOAB, 747-JOIB, 828-JOBB and 1566-HLAZ all managed good signals from 1400-1440, while the KBS2 parallels on 558 and 603 reached fair levels in and out.
The S9+ recording of 972-HLCA linked below was made on the "barefoot" 3" FSL Tecsun PL-380 Ultralight at 1415. A photo of the "Science Fiction PL-380" making this recording of HLCA during the pre-sunrise darkness is posted at https://app.box.com/s/3jelpflsiug7ojkx140tyj5k953y6o3c 
 
972-HLCA  Korean pop music at awesome level at 1415; best Asian signal of the session
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
"Barefoot" 3" FSL Tecsun PL-380 Ultralight
 
 


Puyallup, WA Ultralight TP's for 3-2

Gary DeBock
 

Very good Asian conditions prevailed during sunrise enhancement this morning, with an awesome S9 signal from 972-HLCA around 1415 as the star attraction. 594-JOAK, 693-JOAB, 747-JOIB, 828-JOBB and 1566-HLAZ all managed good signals from 1400-1440, while the KBS2 parallels on 558 and 603 reached fair levels in and out.
The S9+ recording of 972-HLCA linked below was made on the "barefoot" 3" FSL Tecsun PL-380 Ultralight at 1415. A photo of the "Science Fiction PL-380" making this recording of HLCA during the pre-sunrise darkness is posted at https://app.box.com/s/3jelpflsiug7ojkx140tyj5k953y6o3c 
 
972-HLCA  Korean pop music at awesome level at 1415; best Asian signal of the session
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
"Barefoot" 3" FSL Tecsun PL-380 Ultralight
 
 


Re: Quick question about the latest FSL antennas for the PL-380

ku4a@...
 

Thanks, Gary. That information is a huge help. We will think about whether or not to contact you about the 100 mm ferrite bars.

One more question (yeah, right, surely this can't be the last :-) ): For any given diameter and/or ferrite bar length, how do you know how many turns of the 250/46 Litz wire to use? 

73
Chris
KU4A

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