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

[denton]

The tech didn't say anything to me about excessivent current....and if that 
is what happened, why didn't the fuse in the back of the Omni blow?
----- Original Message ----- 
From: "Vic Klein" <vhklein at ptd.net>
To: <tentec at contesting.com>
Sent: Wednesday, April 20, 2005 4:05 AM
Subject: Re: [TenTec] Omni VI and power supply occilation???


>>  ----- Original Message -----
>>  From: denton
>>  To: Discussion of Ten-Tec Equipment
>>  Sent: Saturday, April 09, 2005 11:14
> Not sure about the "oscillation" thing in the power supply, but Ten Tec
> radios do not fold power back under high-SWR conditions and depend on the
> Ten Tec power supply's ability to limit current supplied to the radio in
> order to protect the finals. There may be an oscillation happening in the
> radio that is causing it to to draw excessive current and since your 
> supply
> is not limited, that may be affecting the finals. Ten Tec used to sell an
> outboard circuit breaker for "foreign" supplies that went between the rig
> and supply to provide the same protection. I'd suggest getting that or an
> equivalent in your setup.
>
> =Vic=
> WA4THR
>
>>  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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