Date   

Re: Soldering Litz Wire Method

Paul Blundell
 

Great post and interesting comment on the wife finding the spoon, I think some might prefer we were doing drugs and not playing radios.


On Sat, 4 Jul 2020, 2:26 a.m. lamontcranston17, <nojunk@...> wrote:
Just a comment about soldering litz wire after seeing Gary's comment
about a 65 watt iron..

  I have a had success using a stainless steel spoon set on a burner of
the stove.

You will probably need to bend it or rest it on something to get it ti
set level on the burner.

I set the burner on high and melt a  enough solder in the spoon that I
can dip the end of the Litz wire into it at an angle.

That temp setting may me able to be reduced, but it needs to be hot.
Experiment.

I make sure to use rosin flux on the Litz wire. It is basically a small
solder pot that does a good job.

It is a little tricky because your fingers can only stay near the hot
burner so long!

Take the spoon when the wife's not looking and do not return it.

If she finds the spoon with a burned rosin stain, she will question
whether you are shooting drugs.


                          Mikek


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Soldering Litz Wire Method

lamontcranston17
 

Just a comment about soldering litz wire after seeing Gary's comment
about a 65 watt iron..

 I have a had success using a stainless steel spoon set on a burner of
the stove.

You will probably need to bend it or rest it on something to get it ti
set level on the burner.

I set the burner on high and melt a  enough solder in the spoon that I
can dip the end of the Litz wire into it at an angle.

That temp setting may me able to be reduced, but it needs to be hot.
Experiment.

I make sure to use rosin flux on the Litz wire. It is basically a small
solder pot that does a good job.

It is a little tricky because your fingers can only stay near the hot
burner so long!

Take the spoon when the wife's not looking and do not return it.

If she finds the spoon with a burned rosin stain, she will question
whether you are shooting drugs.


                         Mikek


--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Re: Long Term DX Project - 27/06/2020

Dan Merta
 

Ah ok. Iv'e been hearing 4QL from Longreach coming in at night lately. I'll listen in during the day. 


Long Term DX Project - 1/07/2020

Paul Blundell
 

Date: 1/07/2020
Time: 19:30
Location: Home, Launceston Tasmania
Notes: Early evening session at home.
 
 
Freq
Callsign
Logged
531
3GG
GOOD
549
2CR
GOOD
594
3WV
EXCELLENT
621
3RN
EXCELLENT
774
3LO
EXCELLENT
1053
2CA
AVERAGE
1179
3RPH
POOR
1341
HPON GEELONG
GOOD
1422
HPON MELBOURNE
GOOD
1503
3KND
AVERAGE
 
 


Re: Gary's New 6" FSL Design

Gary DeBock
 

On Thu, Jul 2, 2020 at 08:09 AM, Gord Seifert wrote:
Hi guys. I am mainly a lurker here but this post forces me to ask a question. If the Q of the 1162 strand Litz is bordering on too high, why not use 660? The price of 100 ft. of 660 is about the same as 60 ft. of the 1162. The description of the 660 lists ridiculous Q numbers, even with about half the strands, although I have no idea how that would directly compare to the 1162 since he doesn't mention testing Q with 1162. Nor do I know how they would compare when used to create an FSL.
Hi Gord (and Todd),

Todd, thanks for your interest and questions about the new 6" FSL design, which I plan to answer in detail within a day or so.

Gord, 660/46 Litz wire was actually used in all of the most sensitive medium wave FSL antenna designs from 2011 until 2014, when the new 1162/46 Litz wire first became available. As such, all of the DXpedition FSL's (and long range AM-DX results) from 2011-2014 were based on this Litz wire.

After the new 1162/46 Litz wire became available in 2014 it was substituted for the 660/46 Litz wire in a few FSL test models here, and direct A/B signal test comparisons were made on weak signals received by otherwise identical FSL models. The 1162/46 Litz wire models always significantly outperformed the 660/46 models in weak signal reception, to the extent that 660/46 Litz wire was never again used in any of my new FSL designs. The new 1162/46 Litz wire has been one of deciding factors in the success of the new "Frequent Flyer" overseas DXpedition FSL models, which have received AM-DX at over 8,000 miles in places like Hawaii and the Cook Islands.

Of course the high cost of 1162/46 Litz wire is a drawback for many experimenters, not to mention the 60-watt soldering iron required for proper installation. 660/46 Litz wire will certainly be more sensitive than 330/46 Litz wire or something smaller, and unless a fanatical DXer needs the best possible reception in the smallest possible FSL (like for overseas traveling), 660/46 Litz wire is acceptable for most hobbyists. I have never run "Q" tests to compare the performance difference between 1162/46 and 660/46 Litz wire, but the audio signal reception difference between the two was clear enough to make a permanent believer out of this FSL fanatic. If you have any doubts about its performance, feel free to watch the 3" Baby FSL demo video, where it boosts an S3 fringe signal into an S9+ overload  https://www.youtube.com/watch?v=JZtYli09mTg&t
          
Gary DeBock (in Puyallup, WA, USA)

  


Re: Gary's New 6" FSL Design

Gord Seifert
 


   Hi guys. I am mainly a lurker here but this post forces me to ask a question. If the Q of the 1162 strand Litz is bordering on too high, why not use 660? The price of 100 ft. of 660 is about the same as 60 ft. of the 1162. The description of the 660 lists ridiculous Q numbers, even with about half the strands, although I have no idea how that would directly compare to the 1162 since he doesn't mention testing Q with 1162. Nor do I know how they would compare when used to create an FSL.

https://www.ebay.com/itm/Litz-wire-660-46-for-Crystal-Radio-coil-Amateur-Single-layer-insulation-60/160428065987?hash=item255a4204c3:g:CM0AAOSw5VFWMEL1&redirect=mobile

   Regards,
   Gord 
 


Gary's New 6" FSL Design

Todd
 

Hi Gary,

Your new 6 inch FSL is a step towards higher gain in a relatively small package. I look forward to a YouTube review.

Regarding 1162/46 Litz wire used in the 6" FSL, what is the cheapest source of supply that you have found so far?

On AU eBay, 1162/46 Litz wire is quite expensive. Assuming 19 turns in your design, when I build one, there should be at least 1 or 2 extra turns to allow ferrite rod permeability variation.

21(6 x 3.1416) = 396 inches or 33 feet of wire.

The cheapest 1162/46 Litz wire on AU eBay is US $88 for 60 feet. No smaller minimum 33 feet length is available.

With tank coil Q > 500, the bandwidth will average only 2 KHz or less. The audio fidelity will be compromised as a result. Resonant tuning peak will also be sharper. Higher Q = narrower RF signal bandwidth, degraded high frequency audio response, but high signal strength when tuned to resonance.

During the process of testing various early design FSLs, what did you find by using lower resistance wires regarding varying degrees of S/N readability, bandwidth, and audio quality? For an air core loop with 1000 Q, the audio will be quite muffled at 531 KHz.

Regards,

Todd

https://www.ebay.com.au/itm/Litz-wire-1162-46-for-Amateur-Crystal-Radio-coil-Single-layer-insulation-60/153541573281?hash=item23bfca7aa1:g:aT0AAOxyTjNSdFlQ


Re: Long Term DX Project - 27/06/2020

Paul Blundell
 

Nope, 7SD still going.


On Wed, 1 Jul 2020, 9:44 p.m. Dan Merta, <dnmerta0@...> wrote:
2CA 1053 kHz has been coming into Melb well too lately. 
I take it 540 kHz 7SD has been shut down then. 
Regards. Dan. 


Re: Demo of my newly constructed 3.5" FSL

Paul Blundell
 

That is a very good idea, I will try the same with mine.


On Wed, 1 Jul 2020, 7:45 p.m. Gary DeBock via groups.io, <D1028Gary=aol.com@groups.io> wrote:
Paul,

The solution is a "rubber locking tab," which is precut on one side to fit around the curved PVC fitting, and cut flat on the other side to fit up against the rubber plumbing coupler. The rubber locking tab is then superglued to both of these surfaces, with the glue around the plumbing coupler allowed to contact the ends of a couple of ferrite rods. This glued-on rubber locking tab solves both problems.

I have attached a photo of a "rubber locking tab" on a new 6 inch FSL antenna, which is an all-new design incorporating all of the recent high-Q improvements with additional ferrite gain. These powerful new models provide sensitivity very close to the original 15" Monster FSL's-- without the $1K price.

Gary DeBock (in Puyallup, WA, USA)


Re: Demo of my newly constructed 3.5" FSL

Chuck
 

On Tue, Jun 30, 2020 at 10:26 PM, Gary DeBock wrote:
Congratulations again on your success, and good luck tracking down lots of DX!
Thank you Gary! It's a great way to practice the hobby anywhere.
Best to you.


Re: Long Term DX Project - 27/06/2020

Dan Merta
 

2CA 1053 kHz has been coming into Melb well too lately. 
I take it 540 kHz 7SD has been shut down then. 
Regards. Dan. 


Re: Demo of my newly constructed 3.5" FSL

Gary DeBock
 

Paul,

The solution is a "rubber locking tab," which is precut on one side to fit around the curved PVC fitting, and cut flat on the other side to fit up against the rubber plumbing coupler. The rubber locking tab is then superglued to both of these surfaces, with the glue around the plumbing coupler allowed to contact the ends of a couple of ferrite rods. This glued-on rubber locking tab solves both problems.

I have attached a photo of a "rubber locking tab" on a new 6 inch FSL antenna, which is an all-new design incorporating all of the recent high-Q improvements with additional ferrite gain. These powerful new models provide sensitivity very close to the original 15" Monster FSL's-- without the $1K price.

Gary DeBock (in Puyallup, WA, USA)


Re: Demo of my newly constructed 3.5" FSL

Paul Blundell
 

Thanks Get, I have had both those issues. What are the fixes?


On Wed, 1 Jul 2020, 3:26 p.m. Gary DeBock via groups.io, <D1028Gary=aol.com@groups.io> wrote:
<<<   Here's a quick demo of my newly constructed 3.5" FSL. Reception is of the clear channel 50K watt station CFZM in Toronto under poor conditions.
FSL Antenna Demo with Tecsun PL-660This FSL uses 140mm x 8mm rods from a different source since sufficient quantity weren't available from the eBay seller.
https://www.rf-microwave.com/en/ferrite-rods/171/   >>>

Awesome job, Chuck. You obviously aced the 3.5" FSL construction project, and I'm honored to have provided the plans!

By the way, that size of FSL antenna is ideal as a travelling DX companion, either on the road, or as a TSA-friendly overseas DXing antenna (once the Pandemic is over). Craig Barnes from Colorado has used a similar model to track down tons of TP-DX on ocean beaches here in Washington state, along with his PL-380.

There have been a couple of minor improvements made in that model since the construction plans were published, which I'll share with anyone interested (related to stopping unwanted ferrite sleeve rotation, and stopping the ferrite rods from sliding horizontally back and forth during travel).

Congratulations again on your success, and good luck tracking down lots of DX!

73, Gary DeBock (in Puyallup, WA, USA)



Re: Demo of my newly constructed 3.5" FSL

Gary DeBock
 

<<<   Here's a quick demo of my newly constructed 3.5" FSL. Reception is of the clear channel 50K watt station CFZM in Toronto under poor conditions.
FSL Antenna Demo with Tecsun PL-660This FSL uses 140mm x 8mm rods from a different source since sufficient quantity weren't available from the eBay seller.
https://www.rf-microwave.com/en/ferrite-rods/171/   >>>

Awesome job, Chuck. You obviously aced the 3.5" FSL construction project, and I'm honored to have provided the plans!

By the way, that size of FSL antenna is ideal as a travelling DX companion, either on the road, or as a TSA-friendly overseas DXing antenna (once the Pandemic is over). Craig Barnes from Colorado has used a similar model to track down tons of TP-DX on ocean beaches here in Washington state, along with his PL-380.

There have been a couple of minor improvements made in that model since the construction plans were published, which I'll share with anyone interested (related to stopping unwanted ferrite sleeve rotation, and stopping the ferrite rods from sliding horizontally back and forth during travel).

Congratulations again on your success, and good luck tracking down lots of DX!

73, Gary DeBock (in Puyallup, WA, USA)



Re: Demo of my newly constructed 3.5" FSL

Chuck
 

Thanks, Paul!


Re: Demo of my newly constructed 3.5" FSL

Paul Blundell
 

On Wed, Jul 1, 2020 at 2:32 PM Chuck <cgafvert@...> wrote:
Here's a quick demo of my newly constructed 3.5" FSL. Reception is of the clear channel 50K watt station CFZM in Toronto under poor conditions.
FSL Antenna Demo with Tecsun PL-660

This FSL uses 140mm x 8mm rods from a different source since sufficient quantity weren't available from the eBay seller.
https://www.rf-microwave.com/en/ferrite-rods/171/

My experimentation showed that the recommended 27 full turns of the 1162/46 Litz wire were optimum for this unit.
My only other modifications were a plastic base to help secure the variable capacitor to the frame and use of a cut up plastic water bottle to form a stable shell for the loop windings.

The next test is to get out of the electrically noisy Washington DC area and try the FSL at a local mountain called Mt Weather. My immediate goal is to log US clear channel stations as far west as possible, such as KOA in Denver and perhaps even KFI in Los Angeles.

Again, a big thank you to Gary for the well documented plans.

Best,
Chuck Gafvert
Herndon, VA



--
Paul


Demo of my newly constructed 3.5" FSL

Chuck
 

Here's a quick demo of my newly constructed 3.5" FSL. Reception is of the clear channel 50K watt station CFZM in Toronto under poor conditions.
FSL Antenna Demo with Tecsun PL-660

This FSL uses 140mm x 8mm rods from a different source since sufficient quantity weren't available from the eBay seller.
https://www.rf-microwave.com/en/ferrite-rods/171/

My experimentation showed that the recommended 27 full turns of the 1162/46 Litz wire were optimum for this unit.
My only other modifications were a plastic base to help secure the variable capacitor to the frame and use of a cut up plastic water bottle to form a stable shell for the loop windings.

The next test is to get out of the electrically noisy Washington DC area and try the FSL at a local mountain called Mt Weather. My immediate goal is to log US clear channel stations as far west as possible, such as KOA in Denver and perhaps even KFI in Los Angeles.

Again, a big thank you to Gary for the well documented plans.

Best,
Chuck Gafvert
Herndon, VA


Long Term DX Project - 27/06/2020

Paul Blundell
 

Date: 27/06/2020

Time: 22:00

Location: Home, Launceston Tasmania

Notes: My first return session after a break away. 



Freq
Callsign
Logged
531
3GG
GOOD
549
2CR
EXCELLENT
594
3WV
GOOD
621
3RN
EXCELLENT
774
3LO
EXCELLENT
1053
2CA
GOOD
1179
3RPH
GOOD
1341
HPON GEELONG
GOOD
1422
HPON MELBOURNE
AVERAGE
1503
3KND
GOOD


https://ultralightradiodxing.blogspot.com/


Re: [irca] IRCA TIS/HAR LIST (Summer 2020) now posted!!

Mike Sanburn
 

Woo Hoo!!
Mike 


From: IRCA@groups.io <IRCA@groups.io> on behalf of Phil Bytheway via groups.io <phil_tekno@...>
Sent: Sunday, June 28, 2020 1:26 PM
To: NRC-AM <nrc-am@...>; IRCA List <irca@groups.io>; ultralightdx@groups.io <ultralightdx@groups.io>; IRCA2 <mw-dx@groups.io>
Subject: [irca] IRCA TIS/HAR LIST (Summer 2020) now posted!!
 
The IRCA TIS/HAR LIST lists all US and Canadian TIS/HAR stations, by frequency,
including call letters, state (province,) city, county, licensee, address,
coordinates, expiration date, sources and/or dates of DXM/DXN reports. It has been
updated with FCC data, DXM, DXN and DXer reports, and on-line listings through
June 27 2020.

The 2020 IRCA TIS/HAR LIST is posted on the IRCA website for all to download.
The link is: http://www.ircaonline.org/editor_upload/File/TIS_2020.pdf

Note: There appears to be some TIS/HAR activity ongoing at this time, stations
being shut down and new stations with health information. If you hear anything
that is not on our list, please report it to DXM.EiC@...

Feel free to pass this announcement on to other interested eGroups.

Phil Bytheway


IRCA TIS/HAR LIST (Summer 2020) now posted!!

Phil Bytheway <phil_tekno@...>
 

The IRCA TIS/HAR LIST lists all US and Canadian TIS/HAR stations, by frequency,
including call letters, state (province,) city, county, licensee, address,
coordinates, expiration date, sources and/or dates of DXM/DXN reports. It has been
updated with FCC data, DXM, DXN and DXer reports, and on-line listings through
June 27 2020.

The 2020 IRCA TIS/HAR LIST is posted on the IRCA website for all to download.
The link is: http://www.ircaonline.org/editor_upload/File/TIS_2020.pdf

Note: There appears to be some TIS/HAR activity ongoing at this time, stations
being shut down and new stations with health information. If you hear anything
that is not on our list, please report it to DXM.EiC@...

Feel free to pass this announcement on to other interested eGroups.

Phil Bytheway

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