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

Tue Apr 19 14:38:06 EDT 2005

Hi to all--

Perhaps there is over voltage spike generated. If you connect a 1.5KE15A 
diode across the supply line( band to positive lead) between fuse and 
rig, the spike will be clamped. The fuse will also blow.

This is on the rig in the van. I cannot attest to its' effectiveness as 
I have had no problems.I got the idea from "An Ounce Of" on page 38 of 
May, 2002, "73 Amateur Radio Today." K7SUB was author.

73,
Ariel, k4aal

PS. I can copy and send a full copy via USPS. -- aal

David S.McCallum wrote:

> Can you borrow one locally "D", if you blow up the rig again,,,,that
> would really counterproductive wouldn't it...Good Luck Guy and hope you
> find the problem,,,,,Mac
> 
> David S. McCallum/USAF RET./CMSGT/W7SAC/4
> ----- Original Message ----- 
> From: "denton" <denton at oregontrail.net>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Saturday, April 09, 2005 12:24 PM
> Subject: Re: [TenTec] Omni VI and power supply occilation???
> 
> 
> TT said they would repair the Omni again for no cost to me....I didn't
> inquire about shipping, but am sure glad I have my Ft 990 for a back up
> rig.....
> It keeps chugging along.....
> I suspect...and its beyond my modest test equipment to determine....that
> something inside of the Omni is goes into ocillation that normally does
> not.
> I don't think it has anything to do with my power supply system.
> I could pick up a TT power supply to feed the omni, but that would be
> counterproductive.
> 
> 
> ----- Original Message ----- 
> From: "Steve Ellington" <n4lq at iglou.com>
> To: <tentec at contesting.com>
> Sent: Tuesday, April 19, 2005 10:01 AM
> Subject: Re: [TenTec] Omni VI and power supply occilation???
> 
> 
> 
>>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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>>
>>
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>>
>>
> 
> 
> 
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