[1000mp] Mark V high SWR with amp

[D. J.]

I wonder if he's getting RF into the radio and the SWR meter is going 
bonkers.
dj

On Feb 6, 2005, at 12:22, Rob Atkinson, K5UJ wrote:

> If you can do this, try putting some kind of swr analyzer on the input 
> of
> your amp and your amp on a dummy load.
> Key the amp to switch in the input matching circuitry and sweep the amp
> input with the swr analyzer to see how flat it is or whether there is a
> problem.  swap out the jumper cable to the rig with a known good 
> cable.  if
> everything checks out, it seems to me the problem has to be in the 
> rig.  you
> say the swr is full scale when you drive the amp.  that sounds like
> something handling rf is completely open.  maybe something related to 
> t/r
> keying when the amp is being keyed if for example, you employ a keying 
> loop.
> it looks to me like something that is supposed to switch over when gg 
> from
> rx to tx when the amp is in line, isn't happening.
>
> rob/k5uj
>
>
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