> I already have just about all the parts for my amplifier, which will use a
> pair of 813's,
> but before I do too much construction I need to settle on the design :-)
> Since I only
> operate CW I had decided to go class-C, which would easily produce 750-800
> watts from
> these tubes.
Single ended? Or double ended? (P-P or parallel)
> I had decided to use a conventional grounded-cathode circuit with a
> link-coupled
> parallel-tuned input.
> This means that the drive required will be on the order of 10 watts. No
> matter how careful
> I am, I can guarantee that the day will come when I hit it with the full 100
> watts from my
> exciter. So I would want to do something simple to protect the tubes. Should
> I use
> 1) A grid trip circuit that will open the ptt line on excessive grid current,
> 2) A screen trip circuit, etc., or
> 3) Something else?
> I'm looking for ideas.
I vote for adding any circuit that can protect the tubes and their elements.
A separate LED for each part of the protection is a must to me.
--
Ron KA4INM - The next election, I know what is going to happen, I'm going
to help.
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