I should add another note...
It is only my Omni VI that suffers from the blown finals when used with my
battery/power supply/Airpax circut breaker setup.
None of the other TT rigs I have or had in the past (Corsair II, Delta 580)
exhibit the same problem with blown finals.
----- Original Message -----
From: "Denton" <denton@oregontrail.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Thursday, July 13, 2006 9:09 AM
Subject: Re: [TenTec] repairs
> Been there, had that happen. My Omni VI Plus keep blowing up the finals
> and/or final drivers when I was using recommended Airpax breakers in
> conjunction with my homebrew stations power supply and battery backup.
> Under some cirumstances, the rig would attempt to draw far more current
> than
> the finals would tolerate.
> Since I procured matching TT power supplies, ( I also have a Paragon II) I
> have had no further problems with blown finals.
> If there is any slight indication of over current draw from the TT 961
> power
> supplies, they shut down immedately...far faster than the Airpax's can
> react.
>
> ----- Original Message -----
> From: "ROBERT CARROLL" <w2wg@comcast.net>
> To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
> Sent: Thursday, July 13, 2006 8:57 AM
> Subject: Re: [TenTec] repairs
>
>
>>I had recently questioned whether the Omni or similar rigs had a design
>> problem if they needed to be protected by an Airpax breaker. One of the
>> Airpax advocates responded that the issue was not oscillation but the
>> ability of the rigs to put out full power into a mismatch causing a quick
>> thermal failure due to inadequate heat-sinking. To me that sounded like
>> a
>> questionable explanation, but again a misdesign problem if true. But
>> these
>> failures do indeed sound like oscillation problems. Strange indeed. My
>> condolences. It is a painful experience to have to ship a rig out for
>> repair.
>> 73
>> Bob W2WG
>>
>> -----Original Message-----
>> From: tentec-bounces@contesting.com
>> [mailto:tentec-bounces@contesting.com]
>> On Behalf Of Mike Hyder -N4NT-
>> Sent: Monday, November 28, 2005 9:03 AM
>> To: Discussion of Ten-Tec Equipment
>> Subject: Re: [TenTec] repairs
>>
>> I've had similar experiences (current jumping up all of a sudden because
>> of
>> self-oscillation) with the older Ten-Tec radios. In my case the trouble
>> was
>>
>> caused by the rig's not producing ALC voltage because of bad diodes. I
>> called Garland and he said something like, "Yep, they can do that if the
>> diodes are bad." It cost me about $0.96 to make the repair.
>>
>> 73, Mike N4NT
>>
>> ----- Original Message -----
>> From: "Larry DiGioia" <listacct@longwire.com>
>> To: <tentec@contesting.com>
>> Sent: Sunday, November 27, 2005 10:30 PM
>> Subject: [TenTec] repairs
>>
>>
>> OK, guys, I normally consider myself a pretty patient guy. But this is
>> getting to be a bit much.
>>
>> I have sent my OmniVI Plus back to the factory 3 times in one year. Each
>> time for (roughly) the same problem: the transmitter keeps blowing out.
>> After the second time, I set myself up with the best antenna tuners that
>> money can buy, just in case it was my fault. As of now, I really don't
>> think it was.
>>
>> Each time, I am able to operate for a short time, a few hours, before
>> something gives, and the transmitter is then only able to go into some
>> kind of oscillation where it pegs the current meter after advancing the
>> power level up past a couple of watts. This happens while slowly and
>> carefully advancing the power control in preparation for tuning up.
>>
>> It happened again today. This time around, I was able to run 80m during
>> sweepstakes a few weeks ago for several hours, and that is the only time
>> I have had the radio on since getting it back. Then I tried to tune up
>> on 20m this morning, and <poof>.
>>
>> To their credit, they have replaced many components, last time at no
>> charge. But this will be the second DX season that I have missed due to
>> the average 4 to 6-week turnaround on repairs - (had to use my spare
>> Yaesu rig for cqww, ugh.)
>>
>> I really like Ten-Tec equipment, but I am rapidly losing faith. It is as
>> if they are just putting band-aids on the problem, instead of actually
>> fixing what is wrong. I have heard, for example, that certain parts for
>> the Omni's are simply unavailable, is there any truth to that?
>>
>> I would really hate to become one of the rice-burner users, but what is
>> my alternative? Any others with similar experiences? Any suggestions
>> appreciated, thanks.
>>
>>
>> --
>> Larry N8KU
>>
>> w w w . l o n g w i r e . c o m
>> 100% CW 100% HF
>>
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>
>
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