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From: JWB@SLACVM.SLAC.STANFORD.EDU
Newsgroups: rec.audio.high-end
Subject: Re: Miscellaneous Comments
Message-ID: <9939@uwm.edu>
Date: 5 Mar 91 13:58:15 GMT
Sender: news@uwm.edu
Lines: 20
Approved: tjk@csd4.csd.uwm.edu
Originator: tjk@csd4.csd.uwm.edu


In article <9903@uwm.edu>, Daniel_Rai@ub.cc.umich.edu says:
>
>     A Dyna Stereo 70 keeps blowing the main fuse
>     seconds after powering up.  The tubes are fine,
>     and they all light up before the fuse blows.  What
>     could be causing this?

(Much deleted)

You say the tubes are fine, but are you sure? I had a similar problem
with a Scott Amp after driving it to hard. Turned out to be the rectifier
tube for the power supply. It too lit up prior to the fuse blowing.

Just a thought...

John Beach

[The 5AR4 is allegedly notorious for heater-cathode shorts, according to 
 a retired technician of my acquaintance.  -tjk]