2. amps-preamps
  3. 185047-8323

VAC Phi 300.1 won't power on.

Upon plugging in my VAC Phi 300.1 power amplifier I heard a soft pop and then it went completely dead.  This was after I had removed and cleaned each of the  8 output tubes.  I've contacted VAC but as it's the start of the weekend I wonder if any VAC users have encountered a similar situation.  I live in Alaska so sending it back is a massive ordeal.  

jensmunk
pdreher's avatar
pdreher
1,185 posts
 

I'd start with checking the fuses.

jensmunk OP
20 posts
 

One thread I read mentioned the "Sentry Circuit" which shuts down the amp if a tube goes bad to avoid damaging the amp.  Is anyone familiar with this circuit, and how to reset it? 

waltersalas's avatar
waltersalas
942 posts
 

Agree with pdreher. Check the fuse.

jasonbourne71's avatar
jasonbourne71
832 posts
 

Take a look inside the amp. A soft "pop" could be a shorted coupling cap. Look for a cap with white stuff coming out one end.

jasonbourne71's avatar
jasonbourne71
832 posts
 

Don't stick your fingers in there! Use a wood skewer to poke around with!

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