[BC] Advantage of tube transmitters...

[Burt I. Weiner]

The thing that I miss about tubes is that you could generally push 
them back down into the socket after a momentary grief.  I've never 
heard a FET say, "Don't do that again!"

Burt

At 05:31 PM 3/9/2009, you wrote:
>Harris has always recommended pair replacement,
>but working with 5's I have found this results in pulling a lot of good
>transistors in boxes with low dissipation. The theory is that if you
>blow one transistor all four in the quad should be changed as a precaution.
>
>If the other problems - matching, overmodulation etc. - are solved when
>the dissipation is nicely in the safe range AND installation is correct,
>the failure rate goes down.
>
>Phil Alexander, CSRE, AMD