[TenTec] Argo V problem

[Wayne Whitman]

Just returned from a vacation with my Argo V and it seems to have a
small problem.
Worked fine before I left but when I got home, the rx audio is strange. 
When you turn the audio up a little, nothing happens, then a little more
and its at full volume.  Turning the audio gain up further produces no
change.
Anyone ever see this type of problem before?

Thanks for any advice.
73,
Wayne
K4ELO
k4elo at fastmail.fm