[Amps] Length of coax from xcvr to amp affecting input swr.

[ToddRoberts2001 at aol.com]

Could it be the tuned input circuit in the amp  you are  driving
just does not have enough range to bring it into a perfect   match 
with your driver? The mismatch may be more noticeable  the
longer  the length of coax between the xcvr and amp.
 
You could try using a  regular transmatch or antenna tuner
between  your rig and the coax going to  the amplifier input and simply
tune that  for a flat SWR to keep your xcvr  output happy.
 
After all a "tuned input" built into an amplifier is  nothing  more
than a small transmatch with small slug-tuned coils that  can
be  optimized or "tuned" broadly for each band. Nothing wrong  with
using an  outboard transmatch and tune it for the band you  are
operating  on.
 
Also I would be sure to use the best quality coax  with  double
shield between the xcvr and amp input.
 
73 - Todd WD4NGG