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Once you try to build a proper 32 pill mobile going ac makes alot of sense. Especially with the pills nowadays. There is loads of trapped potential in an alternator once you make it unregulated and tap the ac. If you have never run ac you just have no idea what can be done . One alt on an ac...

The problem is likely the power supply. Did you replace it yet? 75a is marginal at best for that amp. Especially biased.

Nobody wants impedance

@nomadradio I think it was actually @Shockwave that made that suggestion. I think its brilliant and I wish I could take credit for it

For anyone interested: https://www.w8ji.com/rf_plate_choke.htm

My thoughts exactly.

Thank you!

Where is everyone picking up 8v for their echo boards?

W8ji speaks alot about how and why he designed that choke the way he did. He basically said a series resonance was inevitable on that amp so he chose to "park" a resosnance on a band where it wouldn't be used, 27mhz. It makes me wonder if that's why all the broken ones Ive seen have been used on CB.

An open plate choke or lead somewhere is where I'd look, something on that little parasitic board above the tubes, or look on the supply board for a spot where a diode used to be. Usually they evaporate and you get 0 reading on plate.

People make a big deal about turns ratio and capacitors on these transformers. Yeah they all make a difference but remember you're just making a handshake. If it tunes out it tunes out. You'll notice differences but many combinations will work

Did these not have chimneys?

Anybody have any recommendations for any mail in shops? People that don't have a one-year wait list that do good quality work?

everyone is afraid of antennas with radials. I dunno why.

I find this debate about mosfet finals interesting. Ive got a couple 29s with mosfet swaps they run good, draw slightly less current for the performance. I will say that i never see the watts the shops see. I run at 14 or 15v and my mosfet swaps do 30 ish on a bird 43p. I also have cobras with...

I collect unicorns

Please take my money

If you feel like doing a bit of work i can make a tube swap suggestion. You will need forced air cooling like a pressurized cathode cabinet of some sort and a fan or mini blower., and some ingenuity to clamp the grid to a chassis, and some craftiness for chimneys, u could use a sheet of teflon...

What is wrong with them? I know nothing about the product or it's design.

I always found it interesting that cb amplifiers and their customers want variable power. Except for ldmos amps, ive never seen this on any commercially available amplifiers. People should control the amp with the radio not the other way around.