[TenTec] Omni VI and power supply occilation???

[Steve Ellington]

Looks like you're getting plenty of feedback concerning that oscillation. My first thought was "what bloney!" Then I realized I had misspelled bologna. Really, when it comes right down to it....You can't prove or disprove any of this power supply theory without it costing you another trip to TenTec! I mean,,,are you going to get that VI fixed and hook it back up to that same system just to see if it blows up again? I think not! So then are you going to hook it up to another supply for testing and run it for a few days and THEN hook it back up to the other supply just to see what happens? Again, I think not. I think you're stuck. TenTec will never "approve" your power supply but they will continue to blame it for you trouble and maybe, just maybe there is some incompatability going on here. Who knows...Too expensive to find out!

Steve N4LQ

-----Original Message-----
From: denton <denton at oregontrail.net>
Date: Sat, 9 Apr 2005 08:14:41 -0700
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Subject: [TenTec] Omni VI and power supply occilation???

I recently purchased a used Omni VI that quit transmitting, sent it in to TT 
for repair and alingment. TT replaced the finals and some other work...
I recieved the repaired Omni yesterday and wasted no time getting back on 
the air.
This morning....no rf out AGAIN!!! Exact same sympthons as before.
I made a call to the TT repair department, and they said since I run a 
homebrew power supply, I may have an ocillation from the power supply that 
is destroying the finals in the Omni.
What ocillation??
I have used this power supply for years. It is currently feeding an FT 990 
and uhf/vhf radio without problems. The power supply has fed various TT hf 
rigs thru the years without problem. Is there something unique about an Omni 
that will not allow it to be used in my station on the existing power 
supply??
The power supply is currently hooked up to a pair of absorption mat deep 
cycle batteries with a blocking diode between the B+ and the batteries. It 
has been used this way for quite some time without problem, and the power 
supply alone is capable of 35 amps continous all day long.
TT also tried to tell me this morning that I may have to run the Omni, when 
it gets back from being repaired a second time, on a separate power supply 
that will shut down when it detects ocillation.
Anyone run across this before...thanks.... 


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