[1000mp] Strange bahaviour on 80 meters

Thu, 25 Dec 2003 16:00:05 -0800

Very helpful indeed. Will get back to you with some more data
points, when I get a chance to put dummy load on etc.

Thanks again.

cheers, Paul - VA7NT

On Thu, 25 Dec 2003 18:02:27 -0600 [email protected] wrote:
> >Ok, now I understand. Thanks very much, this is the sort
> >of thing I was looking for, as this is my first experience
> >with the 1kmp. However, if it were a crack, would the
> >problem show itself on all bands? In this case, the problem
> >is only on 80 meters, all the other bands are fine.
> 
> You would think so ... I agree ... but that didn't seem to
> always be the case for others ... as I noted in the other
> email ... my "HIGH SWR" showed up on 10m here, and
> only on 1 of the MPs.
> 
> Another thought, if you have the MP service manual there,
> would be to go into the "hidden menu" and try changing
> the XMIT GAIN for 80m ... just to see if that might be a
> possible solution? <Though I'd be asking myself WHY
> or WHAT changed to require the alignment change ...>
> 
> Is the MP there set for GEN <all band xmit?> If so, another
> test you can try ... is see if the HIGH SWR goes away if you
> try 3501 ... and then 3499 ... in other words, change the
> freq enough for the MP to switch it's internal bandpass circuits,
> and see if the problem goes away ... I think 3500 is one cutoff
> so that might be a useful check <listen carefully to the MP
> as you QSY the VFO, and you'll hear the internal relays click>.
> If the problem changes ... then it might be one of the two relays
> per band located on the band pass board ...
> 
> The only other cause I can recall would be an issue with
> the actual drivers 'taking off' ... but again, that would seem
> to be an all bands issue, and not one ONLY on 80m ...
> 
> Hoping this helps ...
> 
> 73 Billy AA4NU
> 
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cheers, Paul - VA7NT ex VE7CQK - email: [email protected]
"Those who hear not the music. . . think the dancers mad."