KAM.2
Subject: KAM Audio Modification

I have experienced problems using a KAM with the TR78xx series of
transmitters.

The problem was due to overdriving of the audio from the KAM LO outout which
is about 10 mv p-p. While this worked OK on the older TR7400 rig it caused
many repeats and time-outs with the 7800,7830 and 7850. The change is as
follows.. Replace R11 on the KAM board with a 200-500 miniature multu-turn pot
and with the help of another station with a VU meter set the pot for a level
of zero DB or to the same level as a reference station in your area.The
approximate level for the KAM audio out is about 3 mv but you may find minor
differences.


Having trouble getting your KAM to key your transmitter on CW? I hooked up
mine to a Uniden HR-2600 and found it would not key the rig.  So here's a
easy mod which I received directly from Karl Medcalf at Kantronics:

Bypass resistor R-107.  Check your KAM manual for the location.  It's near the
connector end of the TNC, close to the DB25 connector.  You can solder a
jumper wire across the resistor on either side of the board.  Modification
works great!
73, Andy/K4ADL @N4QQ.MD.USA.NA