Mine has been in the shop since 2 Feb or so. Initially, a plate on the "Tune
" capacitor melted. When it was returned to me, their was no power output.
So back to the shop.
The first problem may have been caused by a 14 guage wire from the band
switch to a terminal strip under the "Tune" cap. Not only was this wire
touching the plate of the capacitor, the insulation had worn through
allowing the bare wire to touch the plate.
Yes, the tubes really glowed and got super hot on the first problem. I'm at
a loss to explain your problem, I know this doesn't help; however, if you
haven't done so already, call TenTec and speak to John the "amp man." He
repairs the amplifiers and has been helpful.
Mike
W8TRN
----- Original Message -----
From: "john" <johnmb@nc.rr.com>
To: <tentec@contesting.com>
Sent: Friday, March 09, 2007 12:30 PM
Subject: [TenTec] Centurion probs
I've had a recent failure with my Centurion... was operating it about 600
watts out, when I heard a "TICK" noise (sounded mechanical, not
electrical)
and noted that output power dropped. Plate voltage was still normal, but
no
indicated plate current).
I happened to look into the grill on the top and the PA plates were red.
Turned everything off, then back on a day later, at first all was well,
then the same thing happened again ...amp was normal, then output power
dropped to exciter levels, and the plates began getting hot
Ideas?
John K5MO
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