[Amps] Series C in amp output

[Chris Wilson]

Hello K5AM,

What an elegant machine, lovely! :)

On Thursday, February 15, 2018,  you wrote:


> Bill, the amplifier was built in 1971, and ran with the
> first tube for 17 years. That tube still ran perfectly,
> but I had a few spares on the shelf, and read
> somewhere that it was good to rotate them, for
> gettering. So I began to rotate tubes about every five
> years.

> Very heavy DXing and contest use over 47 years, but
> no problems. The 4CX1000A has serious grid and
> screen current limitations, but the amp has a full set
> of protection circuits. www.zianet.com/k5am/amphfkw.html

> As for tube life in general, I can relate that the 6
> meter amplifier that I built in 1961, with push-pull
> Eimac 4-400A tubes, is still running full power after
> 57 years, with the original tubes, used to work 138
> countries on 6 meters. Was Eimac great, or what?
> And of course Bill Orr, W6SAI (SK), the Eimac ham
> contact at the factory, was great to chat with
> whenever I phoned him with a question.

> 6 meter amp: www.zianet.com/k5am/amp6mkw.html

> 73,

> Mark, K5AM www.zianet.com/k5am







-- 
Best regards,
 Chris                            mailto:chris at chriswilson.tv