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

[Vic Klein]

>  ----- 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....