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Re: Drake LA-4 Amplifier


 

On 2024-04-17 11:44, Jim Shorney wrote:

Using CB Radio physics it's probably a kilowatt but it would eat tubes
and splatter pretty wide....
*** When I built my homebrew amp back around 1971, I bought the 6LQ6's from
Radio Shack. They had a lifetime warranty on tubes. I carefully put the receipt
in an envelope, and taped it to the bottom of the linear.

That amp was built into an ARC-5 transmitter cabinet. When I first powered it up
without a fan, it burst into flames. I had wound the plate choke on a pyrex test tube, and wrapped it with (flammable) masking tape. I installed a 110V muffin fan on top of it, and thenceforth it ran cool as a cucumber. But it sounded like an idling jet plane :).

Back then, we boasted about the DC input to our transmitters. Most of us didn't have
anything that could measure the output.

- Jerry, KF6VB

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