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Tuned input
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I am thinking of adding a tuned input to one of my amps.? Does anyone make a board?? I searched around and there seems to be nothing available.??
Does anyone have a board laying around?? Maybe from an amp supply or ameritron? I saw there is a nice 200w low pass filter board with relays.? I guess I could repurpose it and make it a tuned input. It needs to be relay switched.? I have control voltages for 5 bands.? |
开云体育Hi Tuner-Seeker W7WRX! ? I believe that LDG makes a board-size tuner just for amp builders. ? 7 Band, 9 Band, I’m not sure. ? But they advertise in QST. ? They’ve been doing that for years. ? Happy New Year weekend. ? Hal Mandel W4HBM |
开云体育They stopped making that unit years ago.? I tried using the at100 remote ldg.? It decided to tune while I was transmitting. That was it. Smoked.
C
On Dec 29, 2023 4:38 PM, "HaL Mandel via groups.io" <hmandel@...> wrote:
Hi Tuner-Seeker W7WRX! ? I believe that LDG makes a board-size tuner just for amp builders. ? 7 Band, 9 Band, I’m not sure. ? But they advertise in QST. ? They’ve been doing that for years. ? Happy New Year weekend. ? Hal Mandel W4HBM |
开云体育On 12/29/2023 3:38 PM, HaL Mandel
wrote:
I just bought two of them for $5 each at a local radio club auction, configured as coax-fed remote antenna tuners (RT-100 and RC-100, no longer sold) intended to be mounted at the antenna, complete with remote which also contains the bias tee (power is supplied through the coax from the remote). W4ZT (and perhaps K4POZ, too) used these for tuned input circuits on some of his amplifiers. Back when they were sold, IIRC, they were around $139 each. 73, Steve K0XP |
开云体育The amplifier version of the AT100 tuner has different stuff
programmed into the PIC chip. 73, Alek VK6APK On 30/12/2023 7:46 am, Steve wrote:
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开云体育On 12/29/2023 3:45 PM, W7WRX wrote:
I suppose the answer to that would be to disconnect power to the tuner after it's done its job.... Or rewire it so it only tunes when power is applied, then you
remove power to keep it from self-destructing-under-drive. Yeah, I know: VERY inconvenient! Perhaps that's why they quit making such units. Steve, K0XP |
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Wasn't there a 7 call ham that made such a board? Think he also made high voltage boards.
On Friday, December 29, 2023 at 06:52:48 PM EST, Steve <k0xp@...> wrote:
On 12/29/2023 3:45 PM, W7WRX wrote:
They stopped making that unit years ago.? I tried
using the at100 remote ldg.? It decided to tune while I was
transmitting. That was it. Smoked.
I suppose the answer to that would be to disconnect power to the tuner after it's done its job.... Or rewire it so it only tunes when power is applied, then you
remove power to keep it from self-destructing-under-drive. Yeah, I know: VERY inconvenient! Perhaps that's why they quit making such units. Steve, K0XP |
开云体育W7IUV. Discontinued long ago. Alek VK6APK On 30/12/2023 8:13 am, mike repinski
via groups.io wrote:
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开云体育I have the AT100 AMP board with the special PIC. I believe the
chip is common but I don't think I know anyone that can copy them.
73, Alek VK6APK On 30/12/2023 7:49 am, Alek Petkovic
via groups.io wrote:
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That call does not seem like the one I was thinking about. Seems it was W7__? __? ? I could be wrong.
On Friday, December 29, 2023 at 07:29:58 PM EST, Alek Petkovic via groups.io <vk6apk@...> wrote:
W7IUV. Discontinued long ago. Alek VK6APK On 30/12/2023 8:13 am, mike repinski
via groups.io wrote:
Wasn't there a 7 call ham
that made such a board? Think he also made high voltage
boards.
On Friday, December 29, 2023 at 06:52:48 PM EST, Steve
<k0xp@...> wrote:
On
12/29/2023 3:45 PM, W7WRX wrote:
They stopped making that unit years ago.? I tried
using the at100 remote ldg.? It decided to tune while
I was transmitting. That was it. Smoked.
I suppose the answer to that would be to disconnect power to the tuner after it's done its job.... Or rewire it so it only tunes when power is applied,
then you remove power to keep it from
self-destructing-under-drive. Yeah, I know: VERY inconvenient! Perhaps that's why they quit making such units. Steve, K0XP |
开云体育No, you are right Mike. It was WD7S. Alek. On 30/12/2023 8:50 am, mike repinski
via groups.io wrote:
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开云体育W7RY?? Dunno whether he made such animals, but he did provide other animals for our zoos? 8-D Steve, K0XP
On 12/29/2023 4:50 PM, mike repinski
via groups.io wrote:
--
See my QRZ.com page at |
开云体育They actually made that unit to be powered up.? If you turn off power, relays unlatch and radio sees no load and or super high swr.
If ya want to blow your radio up follow Steve's advice :)
C
On Dec 29, 2023 4:52 PM, "Steve via groups.io" <k0xp@...> wrote:
On 12/29/2023 3:45 PM, W7WRX wrote:
I suppose the answer to that would be to disconnect power to the tuner after it's done its job.... Or rewire it so it only tunes when power is applied, then you remove power to keep it from self-destructing-under-drive. Yeah, I know: VERY inconvenient! Perhaps that's why they quit making such units. Steve, K0XP |
开云体育On 12/29/2023 7:45 PM, W7WRX wrote:
Dang... they actually designed it so screwed if you do, screwed if you don't...? 8-/ Actually, that makes sense since these aren't latching relays. So instead, you somehow have to whet it's desire to go retune
when the SWR goes too high... how to do that, I wonder? Steve, K0XP
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See my QRZ.com page at |
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I wonder if one of these cheap china atu's could be made to work.
They also sell the setup outside if it's box for 40bucks worth a try?? https://www.ebay.co.uk/itm/166521005922?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Ec92ZeF4TSa&sssrc=4429486&ssuid=z3n9lCyhQEC&var=&widget_ver=artemis&media=SMS In case the link doesn't work, search atu 100 on eBay or similar.? |
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That's the one. Are they still made?
On Friday, December 29, 2023 at 07:58:57 PM EST, Alek Petkovic via groups.io <vk6apk@...> wrote:
Sorry. I forgot the link.
On 30/12/2023 8:57 am, Alek Petkovic
via groups.io wrote:
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开云体育You don't. They don't make it anymore. They only sell the regular auto tuner.? It's a major kludge. Hence me wanting to install a real tuned input.
C
On Dec 29, 2023 10:33 PM, "Steve via groups.io" <k0xp@...> wrote:
On 12/29/2023 7:45 PM, W7WRX wrote:
Dang... they actually designed it so screwed if you do, screwed if you don't...? 8-/ Actually, that makes sense since these aren't latching relays. So instead, you somehow have to whet it's desire to go retune when the SWR goes too high... how to do that, I wonder? Steve, K0XP
--
See my QRZ.com page at |
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Far circuit boards makes the circuit board for a tuned input. It uses relays and comes in 6 band thru 8 band modules. Check with them. It looks like W4ZT was the designer. Mike
On Saturday, December 30, 2023 at 09:43:40 AM EST, W7WRX <clark@...> wrote:
You don't. They don't make it anymore. They only sell the regular auto tuner.? It's a major kludge. Hence me wanting to install a real tuned input.
C
On Dec 29, 2023 10:33 PM, "Steve via groups.io" <k0xp@...> wrote:
On 12/29/2023 7:45 PM, W7WRX wrote:
Dang... they actually designed it so screwed if you do, screwed if you don't...? 8-/ Actually, that makes sense since these aren't latching relays. So instead, you somehow have to whet it's desire to go retune when the SWR goes too high... how to do that, I wonder? Steve, K0XP
They stopped making that unit years ago.? I tried using the at100 remote ldg.? It decided to tune while I was transmitting. That was it. Smoked.
I suppose the answer to that would be to disconnect power to the tuner after it's done its job.... Or rewire it so it only tunes when power is applied, then you remove power to keep it from self-destructing-under-drive. Yeah, I know: VERY inconvenient! Perhaps that's why they quit making such units. Steve, K0XP --
See my QRZ.com page at |
|
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> on behalf of mike repinski via groups.io <mikflathead@...>
Sent: Saturday, December 30, 2023 7:52 AM To: [email protected] <[email protected]> Subject: Re: [ham-amplifiers] Tuned input ?
Far circuit boards makes the circuit board for a tuned input. It uses relays and comes in 6 band thru 8 band modules. Check with them. It looks like W4ZT was the designer. Mike
On Saturday, December 30, 2023 at 09:43:40 AM EST, W7WRX <clark@...> wrote:
You don't. They don't make it anymore. They only sell the regular auto tuner.? It's a major kludge. Hence me wanting to install a real tuned input.
C
On Dec 29, 2023 10:33 PM, "Steve via groups.io" <k0xp@...> wrote:
On 12/29/2023 7:45 PM, W7WRX wrote:
Dang... they actually designed it so screwed if you do, screwed if you don't...? 8-/ Actually, that makes sense since these aren't latching relays. So instead, you somehow have to whet it's desire to go retune when the SWR goes too high... how to do that, I wonder? Steve, K0XP
They stopped making that unit years ago.? I tried using the at100 remote ldg.? It decided to tune while I was transmitting. That was it. Smoked.
I suppose the answer to that would be to disconnect power to the tuner after it's done its job.... Or rewire it so it only tunes when power is applied, then you remove power to keep it from self-destructing-under-drive. Yeah, I know: VERY inconvenient! Perhaps that's why they quit making such units. Steve, K0XP --
See my QRZ.com page at |
HaL Mandel