[AMPS] Linear AMP timing

[Pete Smith]

At 08:48 AM 8/8/01 -0700, W7TI wrote:
>
>On Tue, 7 Aug 2001 02:32:15 -0400, Tom Rauch wrote:
>
>>Be sure it opens AFTER the input relays opens also! 
>
>_________________________________________________________
>
>In all this discussion, nobody has mentioned the bias switching.  IMO,
>the amp should not be biased on until all the relays have closed and
>must be biased off before any of them open.

Well, I don't know, but when the T/R relay on my SB-220 began to stick in
the "on" position, it turned out to be the bias contacts that were the
worst burnt.  Maybe a sign that they were trying to open too soon?  


73, Pete N4ZR






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