Date   

Re: FSL+TCF? #ultralightdx

Mark/airchecklover
 

I have used a TCF and a 2 ft air wound box loop (MTM Scientific) together and I had the most fun ever daytime DXing!  I might be one of the people Jay mentioned.  I sent him a recording of me phasing out one station, then another on 570 AM.  Both stations abt. 150 miles from me - one due south, one north east at 30 degrees.  Using the 2 antennas I could fully null one station or 90% null the other.  If not nulling, you can also get amplification. There were plenty of spots on the dial where nothing turned into a copyable something.  A 250 watt daytimer 90 miles away on 840 is an example.  The hitch?  None really although if your AM radio has an AM antenna jack you will get more predictable and repeatable results.  I used a Redsun/Kaito RP2100 which allowed overriding the internal looopstick. Second best (more fiddly) option is to couple the TCF to your radio via the TCF loopstick thingy ma dingy, finding the best possible spot for signal transfer.  "Best possible" is important for best phasing/amplification results with the two antennas down line.  Tape the TCF inductive transducer (technically, that is what it is) to your radio so it doesn't wiggle.  Then negotiate your signal hunting with the TCF and the loop, or whatever your second antenna is and be prepared to be amazed.  

-Mark


Re: FSL+TCF? #ultralightdx

radiojayallen
 

I haven't tried this (and can't right now because most of my stuff is packed for an upcoming move), but a few people have written to me describing notable results using a Twin Coil antenna with a second antenna and physically arranging the Twin Coil elements relative to the second antenna to introduce regeneration. With regeneration you can achieve razor sharp selectivity and huge gain just below the point of oscillation. It is tricky to do even with antennas which have regeneration built-in - when you do it using two antennas, one amplified, it is even trickier but it can  be done.

Jay


FSL+TCF? #ultralightdx

Al Short
 

Has anyone else had any luck or experience combing an FSL with a C.Crane's Twin Coil Ferrite antenna?
I place the pickup (small bar) nearby the 3.5" FSL and find that I can get some notable results.  While there does seem to be some gain, I am most impressed by the directionality/nulling I am able to achieve by rotating the large bar in conjuction with the FSL. Placement of the  small coil near the FSL appears to be quite touchy and there needs to be considerable separation from the large bar to avoid feedback effects.
My current passion is in the "graveyard" and with this setup and my Xhdata 808 (highly recommended) I have made many new catches.  I would love to hear from anyone else with experience with this setup.
Al
AB1QX


Re: Looking for Paul S / Ferrite in SE CT- FARMERIK

Rik
 

Miller  report- Just as it arrived the crystal tuner got 20-30 stations at night on the West BOG which included WWVA-470 miles, WTAM-440 miles and WJR-565 miles. Audio is suburb, there is some fading with out an AVC at night too. Day time locals have even better audio. One pair of stations only 10 KHz. apart can not be completely separated, but I could favor either one. I plan to send it into the shop later for more modern fixed caps and to have other diodes compared for sensitivity. It really hears more than I expected as it is. -FARMERIK


DX500 - 31/01/2020

Paul Blundell
 

Coles Beach, Devonport, Tasmania - 7:15AM

Freq / Name: 0531kHz - 3GG
Site / Power: Warragul - 5000W
Notes: (DX500) (Commercial) - Logged 31/01/2020

Freq / Name: 0621kHz - 3RN
Site / Power: Melbourne - 50000W
Notes: (DX500) (National) - Logged 31/01/2020

Freq / Name: 0693kHz - 3AW
Site / Power: Melbourne - 5000W
Notes: (DX500) (Commercial) -Logged 31/01/2020

Freq / Name: 0774kHz - 3LO
Site / Power: Melbourne - 50000W
Notes: (DX500) (National) -Logged 31/01/2020

Freq / Name: 0828kHz - 3GI
Site / Power: Sale - 10000W
Notes: (DX500) (National) -Logged 31/01/2020

Freq / Name: 0855kHz - 3CR
Site / Power: Melbourne - 3500W
Notes: (DX500) (Community) -Logged 31/01/2020

Freq / Name: 0927kHz - 3UZ
Site / Power: Melbourne - 5000W
Notes: (DX500) (Commercial) - Logged 31/01/2020

Freq / Name: 1026kHz - 3PB
Site / Power: Melbourne - 10000W
Notes: (DX500) (National) - Logged 31/01/2020

Freq / Name: 1116kHz - 3AK
Site / Power: Melbourne - 5000W
Notes: (DX500) (Commercial) - Logged 31/01/2020

Freq / Name: 1179kHz - 3RPH
Site / Power: Melbourne - 5000W
Notes: (DX500) (Community) - Logged 31/01/2020

Freq / Name: 1224kHz - 3EA
Site / Power: Melbourne - 5000W
Notes: (DX500) (National) - Logged 31/01/2020

Freq / Name: 1242kHz - 3GV
Site / Power: Sale - 5000W
Notes: (DX500) (Commercial) - Logged 31/01/2020

Freq / Name: 1278kHz - 3EE
Site / Power: Melbourne - 5000W
Notes: (DX500) (Commercial) - Logged 31/01/2020

Freq / Name: 1341kHz - HPON (Geelong)
Site / Power: Geelong - 5000W
Notes: (DX500) (HPON) -Logged 31/01/2020

Freq / Name: 1377kHz - 3MP
Site / Power: Melbourne - 5000W
Notes: (DX500) (Commercial) - Logged 31/01/2020

Freq / Name: 1422kHz - HPON (Melbourne)
Site / Power: Melbourne - 5000W
Notes: (DX500) (HPON) -Logged 31/01/2020

Freq / Name: 1503kHz - 3KND
Site / Power: Melbourne - 5000W
Notes: (DX500) (Community) - Logged 31/01/2020

Freq / Name: 1593kHz - HPON (Melbourne)
Site / Power: Melbourne - 5000WNotes: (DX500) (HPON) - Logged 31/01/2020

Notes: An early morning session with 18 out of 20 targeted stations logged. The whole band was coming in at amazing signals levels with the stations at the top end of the band really standing out. This location seems to work very well and I will be using it again in the future.

Photos and video: https://ultralightradiodxing.blogspot.com/2020/01/dx500-31012020.html
--
Paul - Moderator
UltralightDX


Logging - 1548kHz - 4QD

Paul Blundell
 

This was logged at 7:30am this morning from Coles Beach on the North West Coast of Tasmania near Devonport. Total distance is 1971km.
Video: https://ultralightradiodxing.blogspot.com/2020/01/logging-1548khz-4qd.html
--
Paul - Moderator
UltralightDX


Re: Looking for Paul S / Ferrite in SE CT- FARMERIK

radiojayallen
 

The NAB (formerly referred to as NARTB) equalization is very severe and only slightly different than the RIAA Phono eq...neither is suitable for a nominally "flat" input signal and will give a huge bass boost and treble cut compared with a "flat" mic input. But have you already determined that a Line level input is not sensitive enough for this application? If not, I would try that first.


Re: New for 2020- Hand Held Radio + FSL DXing Combos

Paul Blundell
 

Welcome to our group.

I run an active blog and am one of the moderators of this group. Gary is the real driver behind this group and the FSL aerials but I am happy to answer any questions I can.

Paul


On Thu, 30 Jan 2020, 9:10 p.m. Alfredo Gallerati, <a.gallerati@...> wrote:
Dear friends of this Group;
I am really happy to be registered as a new member of "UltralightDX Group".
I am a radio amateur with Call IK7JGI.
For several decades, I have been engaged in radio listening in particular.
I have also collaborated with some European BC stations such as: "Voice of The Mediterranean, Malta", Radio Switzerland etc ...
I’m  the editor of the "Radio ... listening" column for many years for the magazine "Radio Rivista", the official monthly Italian Radio Amateurs Association (ARI). I believe in the Ultralight Receivers and FSL Antenna project. I would like to experiment with the construction and testing of an FSL antenna for testing in Medium Wave band.
It would be very interesting to be able to disclose the project and the realization of some FSL antennas to the members of our Association.
Is there any friend who wants to give an interview? I can send some questions via Email. Then I will await your answers. For the moment I thank you all and send my warm greetings !!
 
Alfredo Gallerati, IK7JGI
(ARI – Italian Amateur Radio Association)
 
=========================================================================================================
 
Sent: Saturday, January 18, 2020 3:31 AM
Subject: [UltralightDX] New for 2020- Hand Held Radio + FSL DXing Combos
 
     Last April during a trip to Hong Kong I was highly motivated to chase long range AM-DX, but there was a bizarre "Catch 22" problem-- all of the buildings had nasty indoor RFI, while almost all of the outdoor areas were overcrowded, and unsuitable for setting up an elevated 5 inch "Frequent Flyer" FSL antenna. For the entire week I pushed a 7.5 inch loopstick CC Skywave to the absolute limit, taking it on daytime DX trips to Macau and HK's plunging Cape D'Aguilar, as well as shoving it outside a 12th floor security window to escape the indoor RFI. For the first 5 days "long range DX" was a laughable term-- my farthest catch was 693-Bangladesh, at about 1,500 miles.
 
     Finally I sacrificed some sleep and shoved the souped-up Ultralight outside the security window prior to sunrise, and somehow managed to track down 1431-Radio Sawa (Djibouti), 1413-BBC (Oman), 1413-Vesti FM (Moldova) and 1548-TWR (Moldova) on the 7.5" loopstick. The performance of the souped-up Ultralight was thrilling, but the harsh lessons of the Hong Kong trip had already been taken to heart. A fully portable, hand held DXing combo was needed which could provide more gain than a 7.5" loopstick, but which could be easily carried anywhere in a backpack, and which would not attract too much unwanted attention on crowded public beaches. In addition, it would need to routinely pass through TSA inspections at airports, and need to be capable of deployment outside of windows (with a PVC support system) in order to escape interior RFI.
 
     Only one type of hand held antenna could satisfy all of these requirements--- a portable radio + tuned FSL combination attached to a compact PVC frame. Since the TSA-friendly FSL's are all relatively lightweight, combining them with a compact portable radio on a common PVC frame is well within reason for hand held capability. Such a DXing combo would be the master of convenience-- it can track down MW-DX (with decent gain) while being held in the hands, placed on a picnic table, placed on a 5' PVC base, or even elevated to a higher level. The combo's PVC frame can be supported (with attachments) to provide decent DXing gain outside of an apartment window to escape indoor RFI. And even for those who usually have no interest in live DXing, it can check transoceanic propagation and even go after exotic targets prior to broadband antenna setup.
 
     Current experimentation has resulted in four different FSL sizes for combo frames (see photos)-- a 3 inch model (10 Russian surplus 100mm bars), a 3.5 inch model (13 bars), a 4 inch model (16 bars) and the standard 5 inch "frequent Flyer" model (20 bars). The latter FSL is the same model which was used a couple of months ago in Hawaii, tracking down AM-DX from all continents except Europe during sunrise and sunset sessions. The option of having one of these high gain FSL's in a go-anywhere, hand-held combo is pretty thrilling. Future experimentation will use some of the new R40C1 ferrite to make up another series of compact FSL's for this project, as well as drafting a few of the 3 inch "Baby FSL's" with Russian surplus 125mm ferrite rods into the effort. It's looking like an exciting experimental year is coming!
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)

 


--
Paul - Moderator
UltralightDX


Re: New for 2020- Hand Held Radio + FSL DXing Combos

Alfredo Gallerati
 

Dear friends of this Group;
I am really happy to be registered as a new member of "UltralightDX Group".
I am a radio amateur with Call IK7JGI.
For several decades, I have been engaged in radio listening in particular.
I have also collaborated with some European BC stations such as: "Voice of The Mediterranean, Malta", Radio Switzerland etc ...
I’m  the editor of the "Radio ... listening" column for many years for the magazine "Radio Rivista", the official monthly Italian Radio Amateurs Association (ARI). I believe in the Ultralight Receivers and FSL Antenna project. I would like to experiment with the construction and testing of an FSL antenna for testing in Medium Wave band.
It would be very interesting to be able to disclose the project and the realization of some FSL antennas to the members of our Association.
Is there any friend who wants to give an interview? I can send some questions via Email. Then I will await your answers. For the moment I thank you all and send my warm greetings !!
 
Alfredo Gallerati, IK7JGI
(ARI – Italian Amateur Radio Association)
 
=========================================================================================================
 

Sent: Saturday, January 18, 2020 3:31 AM
Subject: [UltralightDX] New for 2020- Hand Held Radio + FSL DXing Combos
 
     Last April during a trip to Hong Kong I was highly motivated to chase long range AM-DX, but there was a bizarre "Catch 22" problem-- all of the buildings had nasty indoor RFI, while almost all of the outdoor areas were overcrowded, and unsuitable for setting up an elevated 5 inch "Frequent Flyer" FSL antenna. For the entire week I pushed a 7.5 inch loopstick CC Skywave to the absolute limit, taking it on daytime DX trips to Macau and HK's plunging Cape D'Aguilar, as well as shoving it outside a 12th floor security window to escape the indoor RFI. For the first 5 days "long range DX" was a laughable term-- my farthest catch was 693-Bangladesh, at about 1,500 miles.
 
     Finally I sacrificed some sleep and shoved the souped-up Ultralight outside the security window prior to sunrise, and somehow managed to track down 1431-Radio Sawa (Djibouti), 1413-BBC (Oman), 1413-Vesti FM (Moldova) and 1548-TWR (Moldova) on the 7.5" loopstick. The performance of the souped-up Ultralight was thrilling, but the harsh lessons of the Hong Kong trip had already been taken to heart. A fully portable, hand held DXing combo was needed which could provide more gain than a 7.5" loopstick, but which could be easily carried anywhere in a backpack, and which would not attract too much unwanted attention on crowded public beaches. In addition, it would need to routinely pass through TSA inspections at airports, and need to be capable of deployment outside of windows (with a PVC support system) in order to escape interior RFI.
 
     Only one type of hand held antenna could satisfy all of these requirements--- a portable radio + tuned FSL combination attached to a compact PVC frame. Since the TSA-friendly FSL's are all relatively lightweight, combining them with a compact portable radio on a common PVC frame is well within reason for hand held capability. Such a DXing combo would be the master of convenience-- it can track down MW-DX (with decent gain) while being held in the hands, placed on a picnic table, placed on a 5' PVC base, or even elevated to a higher level. The combo's PVC frame can be supported (with attachments) to provide decent DXing gain outside of an apartment window to escape indoor RFI. And even for those who usually have no interest in live DXing, it can check transoceanic propagation and even go after exotic targets prior to broadband antenna setup.
 
     Current experimentation has resulted in four different FSL sizes for combo frames (see photos)-- a 3 inch model (10 Russian surplus 100mm bars), a 3.5 inch model (13 bars), a 4 inch model (16 bars) and the standard 5 inch "frequent Flyer" model (20 bars). The latter FSL is the same model which was used a couple of months ago in Hawaii, tracking down AM-DX from all continents except Europe during sunrise and sunset sessions. The option of having one of these high gain FSL's in a go-anywhere, hand-held combo is pretty thrilling. Future experimentation will use some of the new R40C1 ferrite to make up another series of compact FSL's for this project, as well as drafting a few of the 3 inch "Baby FSL's" with Russian surplus 125mm ferrite rods into the effort. It's looking like an exciting experimental year is coming!
 
73 and Good DX,
Gary DeBock (in Puyallup, WA, USA)

 


Re: Looking for Paul S / Ferrite in SE CT- FARMERIK

Rik
 

Thanks Jay
Some of my tube amps have tape head inputs too. I can't remember what the NAB equalization is like for those. Perhaps you know.
Most all with mag phono inputs have equalization choices to try. [RIAA, Lon, EUR, Columbia etc.]
-FARMERIK


Re: Looking for Paul S / Ferrite in SE CT- FARMERIK

radiojayallen
 

If the output is too low for a Line level input I would try a Mic input rather than a Phono input as the phono;s RIAA equalization will give very unflat frequency response.


Re: 918-Australian UnID in the Cook Islands-- 2XL in Cooma?

Gary DeBock
 


<<<   I have listened to this file multiple times, as much as I try I am not able to give you a solid ID. 2XL has now moved to FM and this frequency has not been one that I have devoted much DXing time to.   >>>

Thanks for listening to the MP3, Paul, and it's no big deal that this 918 kHz Oz station remains unidentified. Australia from the Cook Islands isn't exactly exotic DX :-)

I just thought that with 918-2XL having gone silent on AM, I had better ask for opinions before the station's programs fade from the memory of the local AM-DXers.

73, Gary



DX500 - 29/01/2020

Paul Blundell
 

My latest report with photos and a video is online now: https://ultralightradiodxing.blogspot.com/2020/01/dx500-29012020.html

--
Paul - Moderator
UltralightDX


Re: Looking for Paul S / Ferrite in SE CT- FARMERIK

Rik
 

Thanks Paul.

I saw your email before I saw your message here.

I will use a microphone or phono input on a tube Hi-Fi amp made in the 1950's. I have a collection of them to try. It is mentioned in the Miller literature.

Also I expect the 20 Kc. wide selectivity will be too wide, and would want to change the caps to the values recommended by Miller to increase sensitivity and narrow selectivity some what.

I will be choosing from four sharply directional BOGs so adjacent 'channels' will be less common on the dial, and signal strength from the antennas will be high.

They connect into the house via co-ax so low impedance compared to just an inverted L wire directly connected. I may need a matching transformer at the Miller?

-FARMERIK


Re: 918-Australian UnID in the Cook Islands-- 2XL in Cooma?

Paul Blundell
 

Hi Gary.

I have listened to this file multiple times, as much as I try I am not able to give you a solid ID. 2XL has now moved to FM and this frequency has not been one that I have devoted much DXing time to.

Paul
--
Paul - Moderator
UltralightDX


Re: 2019 Shootout?

Paul Blundell
 

I have a couple of Ultralight radios which I have posted reviews for:

https://ultralightradiodxing.blogspot.com/2020/01/review-digitech-ar-1733-dsp-mwfmlwswair.html

https://ultralightradiodxing.blogspot.com/2020/01/review-teac-pr130-portable-amfm-radio.html

I have recently noticed a local store has a ultralight radio for $19.95 which has a digital display, this is something I am planning on purchasing to test it out.


--
Paul - Moderator
UltralightDX


Re: Looking for Paul S / Ferrite in SE CT- FARMERIK

Paul S. in CT
 

Miller made these pretty good in the day. More modern individual components would make it better using ceramic caps and tighter tolerances.

For a start the manual suggests using a 15pF cap on top of both L1 and L2, this is advisable, 18pF looks OK if two are handy. I'm not sure what the Audio Output is intended to be, but I presume 2K headsets of the day (50's). These are coil-wound (inductive type) headphones. Tough to find in new condition and working well.

Modding this with my low power amp requires two crystal earphones in parallel (a great idea no one talked about in the modern day) to be directly driven by the transistor. This would not need any part of the Miller circuit from the diode to the right, substituting the amp. I'll email the small diagram of the whole radio I built, you would not need my "front end". In your case, the 68pF cap that is input cap can to be lowered to 56 or 47pF. Some trade off of final volume for select-ivity, but OK to use 68pF (not any higher though).

Regards
Paul S. in CT fn31nl


Re: Looking for analog receiver suggestions (not necessarily modern nor ultralight)

Rik
 

DEFINATELY take advantage of Jay Allen reviews and excellent information! And since he posts here, he may answer questions after you read his reviews-


https://radiojayallen.com/am-portables-mega-shootout-2019-update/

Also read his article about the RCA globetrotter portables for AM DXing which are my favorite classic analog portable for DXing which is not an expensive model because of excellent selectivity.

In his reviews you will see a number of currant Sangean AM FM portables DX very well. I have a PR-D7 modified to add a antenna jack by PK loops AU. When connected to an outside antenna, it beats the other Sangeans coupled with any external coil I have to the same antenna. If you can wind a coil on the ferrite inside one of the other Sangeans Jay recommends, it should be even better if you use external antennas. -FARMERIK

Barefoot just go with Jays recommendations.


Re: 2019 Shootout?

Marc Coevoet
 

Op 28/01/2020 om 12:41 schreef Rik:
I wonder if I connected the MLA-30 across the antenna winding. It that likely to work? Another way is add a second  winding on the ferrite antenna to couple, but finding the right number of turns would take [me] lots of experimenting. I don't understand enough about RF theory to have any idea where to begin- FARMERIK


I connected the mla30 with an external 2 meter x 2 meter loop, and it works nicely! And what a signal!



Marc

--
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Re: 2019 Shootout?

Rik
 

I wonder if I connected the MLA-30 across the antenna winding. It that likely to work? Another way is add a second  winding on the ferrite antenna to couple, but finding the right number of turns would take [me] lots of experimenting. I don't understand enough about RF theory to have any idea where to begin- FARMERIK

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