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Re: AL80-B tuned input
开云体育Here's the secret for 30m. 20m and 30m share the same slug and they are far apart in
frequency. The advice I got from Ameritron is that you can tune
for 20m OR tune for 30m. You can't have both. Make your choice and
live with it. Given the legal constraints on 30m, it is most logical to set it
for 20m but I ain't gonna judge anyone. 10m and 12m are similar, to a certain extent. You may just need to live with the 2:1 on 12m. If you are a CW man only, you will need to insert additional slugs in the 160m and 80m coil formers.? The cores are all but impossible to move or get out. A good thing to assist is to use locksmiths graphite powder and liberally puff it down into the coil tubes from each end before you start trying to move them.
On 30/12/2023 9:43 am, NI5L wrote:
The 2 prior posts are a perfect segue into my question. My input SWR on 30 is over 3 to 1 and 12 meters is about 2 to 1. The rest seem ok.? |
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Re: AL-80B fan
开云体育Including the beer, count on four. If he only has coffee, it'll probly be just two? 8-) Steve, K0XP
On 12/29/2023 5:41 PM, Bob wrote:
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See my QRZ.com page at |
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Re: Tuned input
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:
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See my QRZ.com page at |
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AL80-B tuned input
NI5L
The 2 prior posts are a perfect segue into my question. My input SWR on 30 is over 3 to 1 and 12 meters is about 2 to 1. The rest seem ok.?
I have searched high and low for instructions on the proper method to tune the input slugs. I know there will be compromises between 20/30, 15/17 and AUX output per band.? Do any of you guys have a simple way to adjust the slugs to get the input SWR down to a better place? I'm lost here. Thanks and 73 Warren / NI5L |
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Re: AL-80B fan
LOL! I'm gonna go there mid afternoon after work and was curious how long this will take. An hour, 2 hours, 4 hours??? Bob W4JFA On Fri, Dec 29, 2023, 8:15 PM Alek Petkovic via <vk6apk=[email protected]> wrote:
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Re: AL-80B fan
开云体育Depends on how much beer you are gonna drink. It's actually pretty simple from memory. 73, Alek. On 30/12/2023 9:13 am, Bob wrote:
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Re: Tuned input
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Re: Tuned input
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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Re: Tuned input
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 |
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Re: Tuned input
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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Re: Tuned input
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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Re: Tuned input
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 |
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Re: Tuned input
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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Re: Tuned input
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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Re: Tuned input
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 |
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Re: Tuned input
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 |
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Re: Tuned input
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 |
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Tuned input
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.? |
Bob
HaL Mandel