Date   

Re: New ULR Log #950

robert ross
 

Good Job John!!!! Glad to hear you are still hitting the ULR Dials!! Good luck in the Home Stretch on your way to # 1,000……

73…ROB VA3SW

Robert S. Ross
London, Ontario CANADA

**********************************************


On 2016-02-11, at 8:53 PM, jcereghin@... [ultralightdx] wrote:

 

Hi, everyone,


I haven't checked in that much lately but I am still at the dials.


I just logged my 950th ULR log:


1600 WTZQ, Hendersonville NC, 2/11 1800 Local, good TOH call ID, into local ads.  Logged barefoot on my PL-310.


I may get to 1000 stations in another year or so at the rate I am going lately.


John Cereghin WDX3IAO

Smyrna De


New ULR Log #950

jcereghin@...
 

Hi, everyone,


I haven't checked in that much lately but I am still at the dials.


I just logged my 950th ULR log:


1600 WTZQ, Hendersonville NC, 2/11 1800 Local, good TOH call ID, into local ads.  Logged barefoot on my PL-310.


I may get to 1000 stations in another year or so at the rate I am going lately.


John Cereghin WDX3IAO

Smyrna DE


Original 3" Bar FSL Tecsun PL-380 Model-- Shielded Litz Wire Question

Gary DeBock
 

For those who have access to the scarce 100mm x 20mm x 3mm ferrite bars and who have built (or plan to build) the original 3" Bar FSL Tecsun PL-380 model (for which the construction article is posted at http://www.mediafire.com/view/w0gcek56f6aq7kr/3_Inch_FSL_Tecsun_PL.doc ), the question has arisen about whether the shielded Litz wire procedure used in the new 4.25" FSL "Pest Control" PL-380 model (posted at http://www.mediafire.com/view/je2v6xorlnjmmbo/4.25inchFSLPL-380.doc ) would be a good idea to improve nulling performance. At first this seemed like a routine conversion, and two of the original 3" Bar FSL PL-380 models were modified here to include shielded Litz wire.
 
As it turns out, the question of adding shielded Litz wire to this original 3" Bar FSL model is more complicated. This model was designed to include a Bar FSL which is pretty close to the maximum RF tolerance level of the PL-380's Si4734 DSP chip. As long as the article's instructions are carefully followed there is no problem with DSP chip overloading, but any changes which increase the sensitivity of the model run the risk of borderline DSP chip overloading.
 
The conversion to a shielded Litz wire system has the net effect of increasing the RF signal level from the 3" Bar FSL, mainly because none of the RF signal is lost along the extended run of Litz wire. As such the sensitivity level of the model is slightly increased, triggering borderline DSP chip overloading in the two test models here (on the X-band frequencies from 1600-1700 kHz). The 4.25" Bar FSL has no such issue, and avoids any DSP chip overloading even with the shielded Litz wire system.
 
As designed, the 3" Bar FSL model already has exceptional nulling ability for a portable (even without the shielded Litz wire system), and my recommendation for those who have the 100mm ferrite bars is to construct the model according to the original article, and avoid the shielded Litz wire system. I'm fairly certain that anyone who builds the model according to the instructions will be more than satisfied with its DXing performance.
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
 
  


Re: 850-KICY (Nome, Alaska) Received by Ultralight Radio DXer in Japan

Tom k2bew <tombewick@...>
 

Quite good, thanks for sharing it! Tom


On Sunday, February 7, 2016, D1028Gary@... [ultralightdx] <ultralightdx@...> wrote:
 

For those interested, Hiroyuki Okamura of Yokosuka, Japan has posted a YouTube video of his reception of 850-KICY (Nome, Alaska) on his 7.5" loopstick CC Skywave model at home. Congratulations, Hiroyuki-san!
 
 
73, Gary deBock (in Puyallup, WA, USA)



--
Gmail


850-KICY (Nome, Alaska) Received by Ultralight Radio DXer in Japan

Gary DeBock
 

For those interested, Hiroyuki Okamura of Yokosuka, Japan has posted a YouTube video of his reception of 850-KICY (Nome, Alaska) on his 7.5" loopstick CC Skywave model at home. Congratulations, Hiroyuki-san!
 
 
73, Gary deBock (in Puyallup, WA, USA)


Re: New "Pest Control" 4.25 inch FSL Tecsun PL-380-- "Heathkit-like" Construction Article

Tony Magon
 

Thanks for the article Gary

Regards

Tony Magon

VK2IC



On Thu, Feb 4, 2016 at 9:13 PM, D1028Gary@... [ultralightdx] <ultralightdx@...> wrote:
 

Hello All,
 
A second FSL-powered Tecsun PL-380 model has been developed with sensitivity and selectivity comparable to the original 3" Bar FSL model introduced in December-- but with a greatly superior nulling capability added as well. This model has been specifically designed to cut pest stations down to size-- and does so with breakthrough effectiveness.
 
Using the commonly available 62mm Russian surplus ferrite bars, the model features both an isolated FSL coil and a shielded ground for the Litz wires. Breakthrough FSL sensitivity is augmented by the PL-380's Si4734 DSP chip, providing the triple advantage of superior weak signal performance, razor-sharp selectivity and exceptional nulling function. As with the original hard-wired FSL PL-380 model, the radio's internal Si4734 DSP chip tunes the FSL antenna for maximum sensitivity, so there is no need for the DXer to peak a variable capacitor. Each frequency tuned in on the PL-380 is already peaked for maximum sensitivity from 521-1701 kHz.
 
The full 15-page "Heathkit-like" construction article has been uploaded to http://www.mediafire.com/view/je2v6xorlnjmmbo/4.25inchFSLPL-380.doc
 
Good luck to all who take up the challenge!
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)  



New "Pest Control" 4.25 inch FSL Tecsun PL-380-- "Heathkit-like" Construction Article

Gary DeBock
 

Hello All,
 
A second FSL-powered Tecsun PL-380 model has been developed with sensitivity and selectivity comparable to the original 3" Bar FSL model introduced in December-- but with a greatly superior nulling capability added as well. This model has been specifically designed to cut pest stations down to size-- and does so with breakthrough effectiveness.
 
Using the commonly available 62mm Russian surplus ferrite bars, the model features both an isolated FSL coil and a shielded ground for the Litz wires. Breakthrough FSL sensitivity is augmented by the PL-380's Si4734 DSP chip, providing the triple advantage of superior weak signal performance, razor-sharp selectivity and exceptional nulling function. As with the original hard-wired FSL PL-380 model, the radio's internal Si4734 DSP chip tunes the FSL antenna for maximum sensitivity, so there is no need for the DXer to peak a variable capacitor. Each frequency tuned in on the PL-380 is already peaked for maximum sensitivity from 521-1701 kHz.
 
The full 15-page "Heathkit-like" construction article has been uploaded to http://www.mediafire.com/view/je2v6xorlnjmmbo/4.25inchFSLPL-380.doc
 
Good luck to all who take up the challenge!
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)  


Re: " Oate" foam - FSL PL-380

Ryan Martin
 

I use sill sealer available at any home improvement store. Make sure to get the type without the ripples. The oatey foam comes with a big metal staple in it, causing deformation.
Ryan


" Oate" foam - FSL PL-380

Jerry Rappel <ww0e@...>
 

Anyone have an extra piece of 4" Oatey foam to spare,
Will pay for it. Can't locate any around here.
Will the small type bubble wrap work?

Thanks,

Jerry  WWØE



4" Oatey foam - FSL PL-380

Jerry Rappel <ww0e@...>
 

Anyone have a piece of 4" Oatey foam to spare,
Will pay for it. Can't locate any around here.
Will the small type bubble wrap work?

Thanks,

Jerry  WWØE


Re: Foam-doodles

josephrot
 

RE: <<  While at the Post Office the other day, I saw 12" long  red "foam doodles"
hanging on the boxes/packaging rack. $2.99 each.  >>

The USPS will send you up to say, 10 air-foam padded enclosures, with one dimension being about 14 inches.
 
Use these instead of $2.99 foam doodles ?  Wrap up what you are protecting better than foam doodles ??

Mainly because USPS will usually send you the above mentioned padded units free of any charge -- presuming of course that you use USPS to ship whatever you are carefully protecting.

Joe Rotello / Knoxville, TN / USA


FSL-enhanced Ultralight Radios-- Experimental Discoveries

Gary DeBock
 

Hello All,
 
Late last year the first FSL antenna specifically designed for portable DXing was directly transplanted into a Tecsun PL-380 model-- an experiment which exceeded expectations in every way. The resulting 3" Bar FSL PL-380 opened up a new world of high-sensitivity portable DXing, augmenting the Si4734 DSP chip's excellent selectivity and introducing an unusual nulling capability as well.
 
Since then there has been a torrent of experimentation to investigate and define the parameters of this FSL-enhanced portable DXing breakthrough, most of which has never been disclosed online. In any case, several of the major discoveries are listed below. There is a current top priority here of finishing the "Heathkit-like" construction article for the new 4.25" FSL-enhanced PL-380 (a.k.a. "Pest Control" model) using the commonly available 62mm Russian surplus bars, so time may be limited to respond to detailed technical questions regarding these experiments before that article is completed. The following is posted so that other experimenters can avoid some of the drawbacks that I needed to learn the hard way :-)
 
1) Transplantation of a portable FSL into an Si4734 DSP chip radio works extremely well, although DSP chip overloading starts to occur whenever the FSL's sensitivity rating (coil diameter x ferrite length) exceeds 300. This overloading first shows up as a flutter-type oscillation on the extreme high band (around 1700 kHz), and spreads increasingly to the middle and low band if larger and larger FSL's are transplanted. The largest FSL model that completely avoids this DSP chip overloading is the original 3" Bar FSL PL-380 model (for which the recent construction article was published). That model has an FSL sensitivity rating of 300. A 9-bar FSL model (312 rating) starts to overload on 1610 kHz in the PL-380, while a 10-bar model (325) starts to overload on 1480 kHz.
 
2) The C.Crane Skywave model has some high band overloading even with the original 3" Bar FSL antenna. This DSP chip overloading starts around 1600 kHz, so it is probably correctable with a slightly smaller FSL transplant (maybe around 250 rating, or 2.5" diameter with the 100mm bars). However, the model's DSP chip is a "black box" custom component designed by C.Crane, which doesn't seem to react to the FSL transplants in the same was as the Si4734 chip. The CC Skywave displays some strange symptoms on all frequencies after an FSL transplant, almost as if it requires a "break-in" period.
 
3) Some important nulling discoveries were made in the development of the new 4.25" "Pest Control" PL-380. The isolated coil requires a grounded shield wire around the Litz wires in order to avoid stray signal pickup (which compromises the null). In addition, the new "ultra-symmetrical" Litz wire coil make s a big difference in optimal pest station nulling. In combination with the grounded Litz wire shield and isolated coil, this advantage provides the model with a breakthrough level of portable nulling capability.
 
4) The same nulling advantages in the "Pest Contol" model can be easily incorporated in the original 3" Bar FSL PL-380 model, providing it with the same capabilities. A conversion addendum is being drafted for the original "Heathkit-like" construction article.
 
5) The extreme shortage of the Russian surplus 100mm ferrite bars has made the new "Pest Control" FSL-powered PL-380 (using the commonly available 62 mm ferrite bars) the primary model of experimentation here. Either model provides a breakthrough level of portable sensitivity, selectivity and nulling capability when assembled according to the construction articles. However, the projects do require good close-up eyesight, steady hand coordination and some soldering experience. The PL-380 is not a "Heathkit," and was not engineered to be a modification platform for novices. The circuit board is crammed, and the tiny loopstick connection points are easily damaged by excessive heat or mechanical stress. Suitable experience and caution are advised.
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
 
              


Foam-doodles

Jerry Rappel <ww0e@...>
 

While at the Post Office the other day, I saw 12" long  red "foam doodles"
hanging on the boxes/packaging rack. $2.99 each.

Jerry  WWØE
 


Re: Hard-Wired PL-380 FSL Antenna-- From "Pest Control" to "Pest Extermination"

Gary DeBock
 

Hi Ryan,
 
<<<   Just wondering if the tweak of adding a shielded ground to the two litz wires between the FSL and radio applies to the 100mm original version as well?    >>>
 
Yes, Ryan, it definitely does. Either version with the shielded ground wire and ultra-symmetrical coil orientation becomes a true "pest silencer." I will be writing up a conversion addendum to the original article after the "Pest Control" version article is published.
 
73, Gary
 
   
 
 

-----Original Message-----
From: rmartin100@... [ultralightdx]
To: ultralightdx
Sent: Sun, Jan 31, 2016 6:41 am
Subject: [ultralightdx] Re: Hard-Wired PL-380 FSL Antenna-- From "Pest Control" to "Pest Extermination"

 
Gary,
Just wondering if the tweak of adding a shielded ground to the two litz wires between the FSL and radio applies to the 100mm original version as well?
Ryan 


Re: Hard-Wired PL-380 FSL Antenna-- From "Pest Control" to "Pest Extermination"

Ryan Martin
 

Gary,

Just wondering if the tweak of adding a shielded ground to the two litz wires between the FSL and radio applies to the 100mm original version as well?

Ryan 


Radio Shack 12-586 For Sale

Jerry Rappel <ww0e@...>
 

Radio Shack 12-586 for sale.AM/FM.  Great AM sound and reception

Contact me at ww0e@q.com.

Jerry.

.


Re: "Pest Control" FSL-powered Tecun PL-380-- Construction Parts Required

Gary DeBock
 

Hi Phil,
 
<<<   The web page at the link to C in your parts list says 'Big Boss Noodle 58" Long x 4" in Diameter' at the top of the page and 'Big Boss Noodle 58 inches x 3.5 inches in diameter' in the description.  Should the diameter of the noodle be 3.5" as in your description?   >>>
 
The web page diameter dimension for the Big Boss Noodle is "all wet," because the actual diameter is 3.5", as in the article's parts list (actually 3 7/16", if you want to be extremely precise).
 
In any case, I have ordered one of these Big Boss Noodles from that supplier, and can confirm that the diameter is as specified in the parts list. I can also confirm that I have enough of these short, precut Big Boss Noodle sections to supply one for the cost of postage to anyone in the USA who actually plans to build the model, although those who are interested should wait until the full article is published (in a few days) before requesting one.
 
Several new discoveries regarding ultimate "Pest Control" have been made during the development of this model, which can now can throw a razor-sharp null on my local pest (1450-KSUH, 1 kW at 2 miles) to put it way down in the noise. The article will also include a section on "Advanced Pest Control," including tilting operations.
 
73, Gary DeBock (in Puyallup, WA, USA)
 
   
 
 

-----Original Message-----
From: pirey4@... [ultralightdx]
To: ultralightdx
Sent: Sat, Jan 30, 2016 12:21 pm
Subject: [ultralightdx] Re: "Pest Control" FSL-powered Tecun PL-380-- Construction Parts Required

 
Gary,

The web page at the link to C in your parts list says 'Big Boss Noodle 58" Long x 4" in Diameter' at the top of the page and 'Big Boss Noodle 58 inches x 3.5 inches in diameter' in the description.  Should the diameter of the noodle be 3.5" as in your description?

I'm looking for a local alternative since $23.81 is more than I want to pay for shipping.

Thanks,

phil


Re: "Pest Control" FSL-powered Tecun PL-380-- Construction Parts Required

Phil Irey
 

Gary,

The web page at the link to C in your parts list says 'Big Boss Noodle 58" Long x 4" in Diameter' at the top of the page and 'Big Boss Noodle 58 inches x 3.5 inches in diameter' in the description.  Should the diameter of the noodle be 3.5" as in your description?

I'm looking for a local alternative since $23.81 is more than I want to pay for shipping.

Thanks,

phil


Hard-Wired PL-380 FSL Antenna-- From "Pest Control" to "Pest Extermination"

Gary DeBock
 

Hello All,
 
The final tweak to the new "Pest Control" FSL-powered PL-380 was to add a shielded ground to the two Litz wires as they run between the cabinet and FSL antenna,, in order to stop them from becoming part of the RF reception pattern (and compromising the null depth). This final change has had a significant effect on the nulling capability, which now is sufficient to put any semi-local (Seattle) into silence, and any local (Tacoma and Puyallup) way down into the noise (see attached photos).
 
The full "Heathkit-like" assembly instructions for this model are being drafted, and should be complete within a few days. Fortunately, all of the construction parts for this model are readily available, and at a construction cost of around $90, the model should provide a lot of hobby fun for the $$. Happy hunting!
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)
 
.  


New file uploaded to ultralightdx

ultralightdx@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the ultralightdx
group.


File : /6 Alignment & Modification/3 Inch FSL Tecsun PL.doc
Uploaded by : dxergary <D1028Gary@...>
Description : Detailed "Heathkit-like" construction article (15 pages) to replace the Tecsun PL-380's midget loopstick with a far more sensitive 3" Ferrite Sleeve Loop (FSL) antenna. Includes multiple Photoshop-enhanced assembly photos and operating suggestions.


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/ultralightdx/files/6%20Alignment%20%26%20Modification/3%20Inch%20FSL%20Tecsun%20PL.doc


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


dxergary <D1028Gary@...>

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