[Amps] a BANG in the AMP ?

[Bill Turner]

On Sat, 18 Oct 2003 13:52:33 +0200, "ON4MA Marc"
<marc.wullaert3 at pandora.be> wrote:

>My question is ,wat caused
>the bang ?
>bad tubes ? How could you check the tubes ?

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Start by removing the tubes, or by disconnecting the anode connectors.
If the "bang" no longer happens, re-connect the anodes one at a time.
When the bang reoccurs, you have your answer.

If you have a variac, use it to bring up the AC mains voltage slowly
while monitoring the current.  Saves fuses.  :-) You don't have to use
a 240 volt variac either; a 120 volt one should give you enough
voltage to answer the question.

I have a Commander too, and one thing to beware of is a replacement
fuse holder.  The original fuse holder is pretty short, and if was
ever replaced with a longer one, one of the end terminals can touch
the frame of a nearby transformer when it is reassembled, and that
will also give you a "bang".  This problem could be intermittent if
the terminal is just barely touching.

Don't ask me how I know.  :-) 

-- 
73, Bill W7TI