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[AMPS] SB-220: Operate/Standby Switch

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Subject: [AMPS] SB-220: Operate/Standby Switch
From: RMcGraw@InfoAve.Net (Bob & Linda McGraw K4TAX)
Date: Sat, 03 Feb 2001 16:50:25 -0800
Art:
Thanks for the info and the references.  

Interestingly enough of the 8 or so responses I've received, there seems
to be a wide variance, according to the respondees, as to what EIMAC
specs as the proper warm-up time.  Some said 3 min, some said 5 min and
some said 10 min.  So as it goes, everybody has an opinion.......not
necessarily facts however.

It got me to thinking, wonder what other tube makers spec as warm-up
time.  Perhaps different tube folks have different numbers.  I don't
have a clue where the 1 min figure came from as I built the amp and PSU
some 8+ years ago.

Anyway, this tube has 8043.8 hours on it.  I put them all on it myself. 
Still cranks out the same power today as it did 8 years ago.  In
actuality, I doubt that it's ever been hit with RF drive within 10 or so
min of turn-on.  The fan/fil timer does time-out, allowing HV to be
turned on, in 62 sec however.

Guess I been lucky.  

73
Bob K4TAX


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