I think only the very early Centurions had the vacuum relay.
Mine and later models have relays. Replacing it is not too hard.
BTW I had a similar problem with mine and TT had me put a jumper across a diode
to solve the problem.
Joe K0BX
Stop the insanity!
Please do not add me to any distribution lists (Joke, Stories or Junk) without
my permission.
________________________________
From: Jim Brown <k9yc@audiosystemsgroup.com>
To: tentec@contesting.com
Sent: Sun, January 6, 2013 5:56:05 PM
Subject: Re: [TenTec] Centurion problem
On 1/4/2013 2:08 PM, Doyle wrote:
> I have been having problem with my receive not returning after transmitting.
>This also happens using either a TS-590 or Omni VI.
>
> Is it possible to clean the relay contacts in the amp? Where is the
> relay
>located?located.
It sounds like a vacuum relay going bad. Contacts are not accessible. You
replace the relay. Ten Tec is VERY expensive as a source of parts, and as a
reapir station. If you have reasonable soldering skills, you can replace the
relay in an hour or two. You'll need to figure out the manufacturer's part
number. Ten Tec used two over the years, KiloVac and Jennings. They are very
different physically, so you need to figure out which you have. The Jennings is
an RJ1A, and sort of looks like a stack of nickels with leads on top. The
KiloVac is long and skinny, with leads along the body.
You also need to know the coil voltage. I don't know the Centurion, but Titans
use 28Vdc, and the Hercuules II uses 12Vdc. Look at the schematic to figure
out
what the voltage is for the low voltage power supply.
These relays are widely available in the $75 range, both as "pulls": from
mdiecal electronics, and new from a company called GigaVac. Alpha now uses
GigaVac, and I've been using them for about five years. GigaVac will sell them
direct to hams at a discount, about $75, and you can also buy them from a
dealer, Max Gain Systems.
73, Jim K9YC
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