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Re: [TenTec] Repair of Omni VI which had been transmitted into

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Repair of Omni VI which had been transmitted into
From: Ken Brown <ken.d.brown@hawaiiantel.net>
Reply-to: ken.d.brown@hawaiiantel.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 13 May 2012 19:38:03 -1000
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
>
> In short: there is no easy, straightforward way out of this. Stuff 
> like this is relatively rare  and on a par with low-end lightning 
> damage, so there is no cookbook answer to what might have been destroyed.
>   
I think this is a good assessment of the situation, except the damage is 
probably not quite as spread out and unpredictable as it would be with a 
lightning strike. It is certainly not hopeless. If a full kW was 
delivered to the antenna port of the Omni VI I would expect all of the 
BPF switching diodes to be toast, as well as the drivers that drive 
those diodes. Some toasty BPF inductors and capacitors too. But, maybe 
no damage to the other circuitry further from the front end and first 
mixer. With a lightning strike the damage could be anywhere.

Find out what still works. Can you inject a signal into the 9 MHz IF and 
get audio out? Does TX power come out? If not does the low level driver 
produce anything? If you can get this radio to work, you are going to 
learn a lot about it in the process. I think it is a worthwhile endeavor.

DE N6KB 
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