Sounds like some sort of parasitic oscillation that ran away. Since it is off
the normal resonate frequency of your antennas the SWR and power will be all
out of whack. Why it happened is anybody's guess. It's going to take some
testing to figure it out....
Cecil
K5DL
Sent from my iPad
On Dec 29, 2012, at 5:29 PM, Josh Hatton <w4zzk73@gmail.com> wrote:
> Hi All
> New here... hope to meet fellow TT ops OTA soon.
>
> Just got my 562 Omni V back from TT Service for relay replacement. Had it
> on the air for about 4 hours... all was great...went to bed... came out the
> next day, began to tune up on 75m, was tuning fine, then all of a sudden, I
> had close to 200 Watts of power, high swr (where before all this started,
> the swr was around 2:1), and oddly, the RF pot didn't change the RF output.
> I cut it off and have not pursued it yet. Could this be an issue with the
> new relays? Just thinking out loud... I understand there is an 'unspoken'
> thing about the PA in the Omni V where if you use the 962 TT PSU, there is
> over-current system that will shut it down before anything happens. I
> unfortunately don't have that luxury, with an Astron RS35M. Could this have
> been prevented with the 961 or 962 PSUs?
>
> Any ideas on what happened?
>
> Thanks es 73
> Josh // W4ZZK
>
> Sent from Droid X Mobile with MIUI...
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