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Blown Threshold S/300 Stasis II

I over drove it tonight and it went quiet without warning.The on/off light works.
I was really pushing it but I heard no distortion or clipping.I've never played it this loud,but I feel I still had head room.
Im using a re-built Dynaco ST-70 on top.
The Dyna seems fine.
The Threshold has a breaker for a on/off switch but I didnt notice if it had tripped.
One thing I did notice,is the left channel heat sinks were considerably warmer (not hot) than the right channel heat sinks.
Anyway,the amp is dead quiet.
Could it be the breaker/on/off switch 'burned' and a simple replacement may cure the problem?
Or am I in trouble?
Thank you for any advice.
dave

128x128david99
unsound
7,329 posts
 
Hi David,
Sorry to hear of your dilemna. Did you check the fuse(s)? Is the Dyna ST-70 a tube unit? If so, maybe there was some DC leakage. I don't know first hand, but, I've heard that the Thresholds can be sensitive about that sort of thing. Best of luck sorting it out. Do you have a back up amp?
david99's avatar
david99 OP
1,467 posts
 
Thanks Unsound for the fuse tip.
The two 5 amp fast blow fuses on the negative rail blew.
Problem fixed.
shiva
181 posts
 
I used to have a forte amp that I believe was made by threshold. Inside that amp each channel had 2 fuses.
Try taking the top off and see if they are blown. If so, you might find replacements at radio shack.
jpainter236's avatar
jpainter236
115 posts
 
Email Jon Soderberg at Vintage Amp Repair. vintageamp@earthlink.net
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