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Re: [TenTec] Centurion problem

To: <k9yc@arrl.net>, "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] Centurion problem
From: "mcelmer1" <mcelmer1@netecin.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 6 Jan 2013 11:53:16 -0700
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
I had this problem - both times it was the QSK board. I recently had another problem but can not remember the symptons - they appeared to another QSK board but it was the AC/bias board.
FWIW, the afterburner is 10+ years old and never had a relay problem. Over 
the years, Ten Tec has comp'd (that means no charge) a few parts. As time 
goes on, parts are rarer, supplies decrease, prices increase.
I would consult with Jim at Ten Tec. A QSK board will set you back about $50 
if they are still stocked.
Mike
W8TRN
----- Original Message ----- From: "Jim Brown" <k9yc@audiosystemsgroup.com>
To: <tentec@contesting.com>
Sent: Saturday, January 05, 2013 11:03
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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