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Re: Innovative Ferrite Antennas Article
Marvelous article, Gary! What a lovely pic of your cliffside (Oregon) DXing site and the very blue sea - I can hear the singing hetrodynes now! Way back in the early-mid. 80s when I rolled out long (1100 ft. / 330m) Beverage antennas from a tent-DXing site atop Mount Vision (Inverness Ridge) in the Point Reyes NS - Marin County, Calif., the additional altitude of 1100 feet above sea-level (thus a much greater view out to the distant horizon) really ENHANCED TP DX - especially DUs and Hawaiians, compared to the near sea-level beachside DXpeditions. It is possible the much farther-view of the horizon allows for the really low-angle "combined constructively-phased groundwave-skywave" effect to occur - TP signals would stay in post sunrise for longer periods compared to the near-sea level sites at Abbotts Lagoon and North Beach (all within Pt. Reyes National Seashore). As such, I think that really FAR OUT horizon view in your photos in this article is also an added factor WHY TP DX is so superior there (as it was atop Mt. Vision for me).
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73 and thanks a lot!, Steve McGreevy www.auroralchorus.com
On Thu, Sep 5, 2019 at 05:18 AM, Gary DeBock wrote: https://dreamcrafts.box.com/s/kp487ahn3wm3dd7rkb6thvddyt7wixgb
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SPMcGreevy "OFSL" (open FSL) loop test-results and photos
It has been a few months since I reported on the results of what I now call my “OFSL” or “Open Ferrite Sleeve Loop” that I had constructed around a 16 oz. / 453g size Folgers “Classic Roast” plastic jar, in that the six 200mm (R40C1 type) are not adjacent to each other as I have seen of Gary’s designs, but are widely spaced around the jar (I had only ordered six of the rods for initial testing/experimentations).The OSFL loop - previously I’d dubbed “the Ugly Duckling FSL” - employed an external (and large/heavy) old Soviet 60-600 pF var. cap. that is designed for transmitting with widely spaced rotor/stator plates), and it was rather “kludgy” to rotate easily.It occurred to me that a smaller open-air var. cap. could be mounted inside the jar’s red lid along with a small SPDT switch to switch in the off-center tap of the Litz winding and some fixed “padding” caps of about 330pF. As such the loop is “dual-band” and goes down to about 340 kHz just incase I wish to use it in the upper NDB band and in the former Maritime segment (430-510 kHz).The result(in the photos) is a very robust and quite water-resistant OFSL that is lightweight and marvelous for taking on Expeditions - even just into a knapsack as I walk out of my small town into a noise-free location.In-yard comparisons with a considerably larger air-core “diamond” loop find that the OFSL has vastly higher-“Q” (sharper tuning) and it also has higher-gain than the larger stand-mounted diamond open loop due to its larger induction-field and the advantages of Litz wire.I can’t wait to take this on a flight to Hawaii (maybe this November 2019) on a DXpedition tentatively planned in a similar fashion to Gary’s Kona (Big Island) Hawaii DXpeditions.Include a couple of photos for presentation here. The OFSL makes AM stations with “barely audible audio” in the daytime to clear/clean copy provided there is no local noise nor QRN (such as 740 KCBS, 620 KIGS, 1070 KNX and many others). Tests were made with one of my two trusty Sony ICF-SW6700GR portables. I can imagine with a modified ultralight portable with switchable pass-band filters, this would be even more superb for coastal DXpeditions!
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Re: Innovative Ferrite Antennas Article
Dennis Breda
Gary, Thank you very much for another superb article. All the best for a wonderful convention. I wish I could be there.
On Sep 5, 2019, at 8:18 AM, Gary DeBock via Groups.Io <D1028Gary@...> wrote:
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Re: Innovative Ferrite Antennas Article
Vimal
Thanks Gary, I enjoyed reading it. Vimal Oberoi
On Fri, Sep 6, 2019 at 6:30 PM radiojayallen <radiojayallen@...> wrote: Gary,
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Re: Innovative Ferrite Antennas Article
radiojayallen
Gary,
Great article...I will save this one. Jay
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Review - TEAC PR130 Portable AM/FM Radio
Paul Blundell
I will be updating this in the future as I use it with my new 3" FSL aerial and report back on how well it works with this.
https://ultralightradiodxingtasmania.blogspot.com/2019/09/review-teac-pr130-portable-amfm-radio.html Paul -- Paul - Moderator UltralightDX
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Re: Innovative Ferrite Antennas Article
Paul Blundell
Thanks for the link Gary, I will have a good read over it. Paul
On Thu, Sep 5, 2019 at 10:18 PM Gary DeBock via Groups.Io <D1028Gary=aol.com@groups.io> wrote: For the benefit of those who cannot attend the IRCA convention in Seattle, an 8-page article has been written detailing the recent innovations in ferrite antennas, including the latest "supercharged" travel portables and the airport-friendly FSL models demonstrating superior performance on exotic overseas ocean beaches. -- Paul --
Paul - Moderator UltralightDX
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Innovative Ferrite Antennas Article
For the benefit of those who cannot attend the IRCA convention in Seattle, an 8-page article has been written detailing the recent innovations in ferrite antennas, including the latest "supercharged" travel portables and the airport-friendly FSL models demonstrating superior performance on exotic overseas ocean beaches.
The article details the four types of antennas offering four levels of ferrite antenna gain, and also four different types of DXing sites offering enhanced propagation for superior results with ferrite antennas. This is the same outline as the speech that will be given at the convention on Saturday, although the article contains additional photos and links https://dreamcrafts.box.com/s/kp487ahn3wm3dd7rkb6thvddyt7wixgb For those who can attend the convention on Saturday there will be a chance for "hands-on" daytime DXing with these ferrite antennas in the afternoon (weather permitting), including the 17" diameter Monster FSL (the world's largest, heaviest and costliest :-) Hope to see you there! Gary DeBock (in Puyallup, WA, USA)
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Re: Testing of radios with FSL aerials
Dennis Breda
Paul, Thanks for sending these communications. I look forward to receiving them. Dennis B
On Sep 5, 2019, at 12:30 AM, Paul Blundell <tanger32au@...> wrote:
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Testing of radios with FSL aerials
Paul Blundell
Hi all.
One of the major advantages of FSL aerials is that they be easily tested with various radios. What I would like to do is start to put together a list of various radios models and how well they handle / preform when used with a FSL. My idea being to look at a cost v benefit v performance graph of the various models. Paul https://ultralightradiodxingtasmania.blogspot.com/ -- Paul - Moderator UltralightDX
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Re: [irca] IRCA Mexican Log 22nd Edition is now available
Phil Bytheway <phil_tekno@...>
Apparently, I am have a senior moment with my subjects!! Phil Bytheway IRCA's "DX Monitor" Editor-in-Chief Seattle WA Drake R-7 / KIWA Loop
On Tuesday, September 3, 2019, 3:25:51 PM PDT, Phil Bytheway via Groups.Io <phil_tekno@...> wrote:
Just in time for the upcoming DX season!!! IRCA Mexican Log, 22nd Edition (Winter 2019) - now available! The IRCA MEXICAN LOG lists all AM stations in Mexico by frequency, including call letters, state, city, day/night power, slogans, schedule in UTC/GMT, formats, networks and notes. The call letter index gives call, frequency, city and state. The city index (listed by state, then city) includes frequency, call and day/night power. The transmitter site index (listed by state, then city) tabulates the latitude and longitude of transmitter sites. Also, in this edition, there is a spread sheet with links to web sites, live broadcasts and facebook page of many of the Mexican stations. This is an indispensable reference for anyone who hears Mexican radio stations. Size is 8 1/2" x 11". The 2019 Mexican Log .pdf is posted on the IRCA website for all to download. The link is: https://www.ircaonline.org/editor_upload/File/2019%20Mexican%20Log.pdf For those preferring a hard copy, one can be ordered from the IRCA Bookstore. Prices: IRCA/NRC members – $5.00 (US), $6.00 (Canada) $8.00 (México), $9.00 (rest of the world). Non-IRCA/NRC members – add $1.00. To order from the IRCA, send the correct amount (in US funds payable to Phil Bytheway) to: IRCA Bookstore, 9705 MARY NW, SEATTLE WA 98117-2334. Or, order through PayPal to Email: phil_tekno@... (Phil Bytheway). Please state club affiliation when ordering. Feel free to pass this along to any other eGroup you feel might be interested. Phil Bytheway/Tim Hall - editor!
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IRCA Mexican Log 22nd Edition is not available
Phil Bytheway <phil_tekno@...>
Just in time for the upcoming DX season!!! IRCA Mexican Log, 22nd Edition (Winter 2019) - now available! The IRCA MEXICAN LOG lists all AM stations in Mexico by frequency, including call letters, state, city, day/night power, slogans, schedule in UTC/GMT, formats, networks and notes. The call letter index gives call, frequency, city and state. The city index (listed by state, then city) includes frequency, call and day/night power. The transmitter site index (listed by state, then city) tabulates the latitude and longitude of transmitter sites. Also, in this edition, there is a spread sheet with links to web sites, live broadcasts and facebook page of many of the Mexican stations. This is an indispensable reference for anyone who hears Mexican radio stations. Size is 8 1/2" x 11". The 2019 Mexican Log .pdf is posted on the IRCA website for all to download. The link is: https://www.ircaonline.org/editor_upload/File/2019%20Mexican%20Log.pdf For those preferring a hard copy, one can be ordered from the IRCA Bookstore. Prices: IRCA/NRC members – $5.00 (US), $6.00 (Canada) $8.00 (México), $9.00 (rest of the world). Non-IRCA/NRC members – add $1.00. To order from the IRCA, send the correct amount (in US funds payable to Phil Bytheway) to: IRCA Bookstore, 9705 MARY NW, SEATTLE WA 98117-2334. Or, order through PayPal to Email: phil_tekno@... (Phil Bytheway). Please state club affiliation when ordering. Feel free to pass this along to any other eGroup you feel might be interested. Phil Bytheway/Tim Hall - editor!
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Re: 7.5” Loopstick LW antenna
Hello Igvitk,
My current 12" Longwave FSL antenna is a slightly more sensitive version of the 2015 model 12" Longwave FSL, the design photo for which is attached. The ferrite rods, frame components and size of variable cap are all the same, although the 660/46 Litz wire has been replaced by 1162/46 Litz wire, which provided a sensitivity boost. Because the 1162/46 Litz wire has a larger diameter than 660/46 wire, though, I was not able to fit enough coil turns on the ferrite sleeve in order to get the start frequency down to 153 kHz. This didn't bother me, though, since the start frequency is now around 195 kHz, which is fine for chasing long range South Pacific and Asian NDB's during a DXpedition. The variable cap has also been replaced with the razor-sharp tuning "384P" type from Oren Elliot Products, which improved the overall performance of all of the FSL antennas used during the recent Rockwork Cliff DXpedition. That type of variable cap is also now the tuner for the "Frequent Flyer" FSL antennas, three of which we plan to use this November in Poipu, Hawaii. 73, Gary DeBock (in Puyallup, WA, USA)
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Re: 7.5” Loopstick LW antenna
igvitk
Thanks, Steve and Gary. I will follow your advice and add extra turns to Amidon rod to increase the inductance. Gary, where can I find information about your 12" Longwave FSL? I like LW DXing and would like to make more powerful antenna than 7.5" FSL.
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Re: Wiki of Links
Paul Blundell
If anybody has any good links for this, please send them to me. I would love to update this and have a good list moving forward.
-- Paul - Moderator UltralightDX
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Re: [nrc-am] Re: [irca] Seattle Convention Schedule
Tony Magon
Thanks for that Nick - and will be interested in seeing the 2019 presentation on the site 73 Tony VK2IC
On Mon, Aug 26, 2019 at 2:58 PM Nick Hall-Patch <nhp@...> wrote:
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Re: [nrc-am] Re: [irca] Seattle Convention Schedule
Nick Hall-Patch
The presentations from conventions go back to 2014:
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http://durenberger.com/DXPAGE.htm Thanks to Mark Durenberger. There's generally a notice about uploads after the conventions, then presumably everyone forgets about it, hi. best wishes, Nick
At 03:58 2019-08-26, MarkWA1ION via Groups.Io wrote:
PDF's of the presentation documents should go online for the benefit of hobbyists around the world.
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Re: [nrc-am] Re: [irca] Seattle Convention Schedule
Paul Blundell
I am happy to share this on my blog and assist with this Paul
On Mon, 26 Aug 2019, 1:58 p.m. MarkWA1ION via Groups.Io, <MarkWA1ION=aol.com@groups.io> wrote:
--
Paul - Moderator UltralightDX
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Re: [nrc-am] Re: [irca] Seattle Convention Schedule
MarkWA1ION
PDF's of the presentation documents should go online for the benefit of hobbyists around the world.
Mark
-----Original Message-----
From: Les Rayburn <les@...> To: markwa1ion@... <markwa1ion@...> Cc: IRCA <IRCA@groups.io>; UltralightDX <UltralightDX@groups.io>; nrc-am <nrc-am@...>; mw-dx <mw-dx@groups.io> Sent: Sun, Aug 25, 2019 11:41 pm Subject: Re: [nrc-am] Re: [irca] Seattle Convention Schedule Can’t make it to the convention this year—but would love to see this presentation. Any chance of sharing the materials afterwards? Even better-could someone videotape the presentation and provide a link?
This technology is really adding a lot to the hobby. Thanks to all who are spearheading the effort.
73,
Les Rayburn, N1LF 121 Mayfair Park Maylene, AL 35114 EM63nf Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA. Elad FDM-S2 SDR, AirSpy SDR2, SDRPlay RSP-2 Pro, Sony XDR-F1HD [XDR Guy Modified], Dennon TU-1500RD, Sangean HDT-1X, Ray Dees RDS Decoders, Korner 9.2 Antenna, FM-6 Antenna, Kitz Technologies KT-501 Pre-amps, Quantum Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs Active Whip. “Nothing but blues and Elvis, and somebody else’s favorite song…”
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Re: [nrc-am] Re: [irca] Seattle Convention Schedule
Les Rayburn
Can’t make it to the convention this year—but would love to see this presentation. Any chance of sharing the materials afterwards? Even better-could someone videotape the presentation and provide a link?
toggle quoted messageShow quoted text
This technology is really adding a lot to the hobby. Thanks to all who are spearheading the effort. 73,
Les Rayburn, N1LF 121 Mayfair Park Maylene, AL 35114 EM63nf Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA. Elad FDM-S2 SDR, AirSpy SDR2, SDRPlay RSP-2 Pro, Sony XDR-F1HD [XDR Guy Modified], Dennon TU-1500RD, Sangean HDT-1X, Ray Dees RDS Decoders, Korner 9.2 Antenna, FM-6 Antenna, Kitz Technologies KT-501 Pre-amps, Quantum Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs Active Whip. “Nothing but blues and Elvis, and somebody else’s favorite song…”
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