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For the OP, does that plate block cap even look like a cap at? 144 mhz ??? ?Will it handle the calculated rf current flowing through it at 144 mhz ? John Lyles,? K5PRO helped myself and Scott out

Glad it’s fixed, Tim. Have fun with it !

I recently acquired a British KW1000 linear which uses a pair of 572Bs and is somewhat similar to the SB200. The power transformer was missing but I have been able to fit a replacement from the junk

I'm not sure if this is in reference to my picture or not, but if so the camera may be playing tricks on you. The teflon I'm using is .4mm thick (in fact it's not even teflon in that mock up, it's a

Sorted! Changed the blocking cap and replaced the muffin fan with a blower big enough for a GS35. Power 350W drifts down to 330W after about 30 seconds, but that could just be the driver power

I see a quantity on Ebay but they are a small fortune. Not what I expected.

Arco was the big name in variable caps at one time. Not sure if they are still around. I wonder if there are any articles on that board? I see the original designer has passed. Mike

Mike.? I ordered the board from Fred at FAR.? He did not have relays or the trimmers. I found the relays and have ordered them. I can't find the trimmers.? I need eight 30-300PF and two 100 to

You guy's guess was about right! No beer but "fireball"! Bob W4JFA

I have tried this in the past. It's a huge KLUDGE and would not recommend it. That tuner is going to try to tune while you are transmitting, You're constantly showing your radio a bad match every time

Yes, you would mount the tuner inside your amplifier somewhere; the output of the input network should be close to the tube. Controls for the tuner, and potentially the display, would be on the front

I guess I don't understand. Your suggesting to install this tuner inside the RF deck? How will you control it? How will you switch it to difference bands?How will you prevent it from tuning as you

Here's a late entry to your options: Get one of the ATU kits that are readily available online, running the software from N7DDC.? Modify the HW, and/or the SW. But you have all of the pieces you need

I really like this option: - code is available - https://github.com/Dfinitski/N7DDC-ATU-100-mini-and-extended-boards - parts kits are orderable from a number of sources, including amazon (get it in

Thank you so much Mike! I will get a board ordered up! C ________________________________ Sent: Saturday, December 30, 2023 7:52 AM To: [email protected] <[email protected]> Subject: Re:

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

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

That's the one. Are they still made?

I forgot to mention that the capacitor values quoted in the user manual bear no resmblance to the ones mounted on the board. I bought a complete new board from Ameritron and same thing. Completely

I wonder if one of these cheap china atu's could be made to work.