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

[denton]

14.2 vdc is the power supply's output at its terminals...it then goes thru a 
blocking diode with about 6/10th vdc drop at the batteries.
----- Original Message ----- 
From: "Carl Moreschi" <n4py at earthlink.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Wednesday, April 20, 2005 4:46 AM
Subject: Re: [TenTec] Omni VI and power supply occilation???


> The Paragon, Paragon II, , Omni V, Omni VI, Jupiter, and Orion all have a
> circuit that reduces drive if the current in the finals goes above a
> threshold.  This circuit not in the original Omni A, Omni D series.  It 
> may
> be that the setting for this threshold is too high on Denton's radio.
>
> I am also sheptical of the power supply output voltage being 14.2 volts. 
> I
> think the maximum should be 13.8 volts.
>
> Carl Moreschi N4PY
> Franklinton, NC
> ----- Original Message ----- 
> From: "Vic Klein" <vhklein at ptd.net>
> To: <tentec at contesting.com>
> Sent: Wednesday, April 20, 2005 7:05 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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