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From: KLUDGE@AGCB1.LARC.NASA.GOV
Newsgroups: rec.audio.high-end
Subject: Destructive KT88
Message-ID: <6866@uwm.edu>
Date: 10 Oct 90 13:05:54 GMT
Sender: news@uwm.edu
Lines: 13
Approved: tjk@csd4.csd.uwm.edu

That's it.  I've had enough of crappy Chinese KT88's which suddenly decide
to pull tremendous amounts of current, opening up the cathode resistor and
glowing red hot.  This has happened three times on my Citation, with three
different tubes.  Never happened at all with the old Mullard tubes.  What's
the problem here?  It's not as if the driver stages were going into
oscillation or anything catastrophic, but it happens repeatedly.
--scott

I've had this problem many times, watching smoke billow out from the base
of the tube socket. In every instance, the solder between the tube lead and
the pin was poor, or nonexistant. Resoldering the pins fixed it.

						-tjk]