[Amps] AL-1200 Intermittent HV Short

Bill Turner wrt at dslextreme.com
Mon Mar 8 09:19:16 EST 2004


On Mon, 8 Mar 2004 08:28:38 -0800, R. Measures wrote:

>•  tnx.  Gassy tubes usually don't blow the fuse, they draw anode-I on 
>standby. 

_________________________________________________________

Ok, if you say so.  My only experience with a known gassy tube was a
3-500Z in a Heathkit SB-1000.  I powered up the amp after it had been
sitting for about five years.  The fuse blew instantly.  I connected it
to a variac and slowly raised the line voltage.  The tube started
glowing a nice purple inside and was obviously gassy.

My AL-1200, on the other hand, developed it's problem relatively
overnight, so gas may not be a likely culprit.  I mentioned it only
because of the possibility.  More likely, something internal shorted.

--
73, Bill W6WRT
QSLs via LoTW



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