ok see privous reply....I just sent it off...
also the Omni, Ft 990 and uhf/vhf rigs are always attached to the battery
output..with a fused B+
TT gave me indication this morning that their power supply shut down
automatically when sensing ocillation...wonder if we are on the same
wavelength here...
----- Original Message -----
From: "J. Reed" <jhreed@chilitech.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Tuesday, April 19, 2005 8:51 AM
Subject: Re: [TenTec] Omni VI and power supply occilation???
> Good morning once more Denton, my inquiring mind
> is starting to focus on your 'supply' which is starting
> to sound like a non-filtered charger, hitting the
> batteries at 35+ amps on positive peaks of about 20+ volts
> every 120th of a second. The Omni can't take that
> (in my opinion) too long. Also, at the initial start
> in the morning, it's posssible that there's a light
> coating of hydrogen bubbles on the plates of the
> batteries and for a fraction of a moment, the spikes
> go straight to the Omni. To test this idea, put your
> scope on the batteries (without the OMNI connected),
> and check for pulses... IF you don't have a scope,
> take your AC voltmeter and set it for about 20 vac
> and see just what the indicated AC reading is.
> Remember, the 1.414 x AC value will give you the peak
> value that might be causing you grief... just some thoughts,
> ----- Original Message -----
> From: denton
> To: Discussion of Ten-Tec Equipment
> Sent: Saturday, April 09, 2005 11:14
> 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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