John's got a good point here.
>From my experience with auto couplers, the circuitry that determines the VSWR
can be susceptible to stray RF during the tune cycle, which can be abundant due
to the opening/closing of relay contacts and the dance around the Smith Chart.
If the undesired RF in the box is at a high enough level, the sense circuit can
be fooled into believing that a good tune solution has been found.
I've never seen the internal coupler up-close and personal; is it in a shielded
enclosure?
Al, K2ZN
-----Original Message-----
From: John Clifford [mailto:johnclif@ix.netcom.com]
Sent: Wednesday, January 08, 2003 7:23 AM
To: tentec@contesting.com
Subject: RE: [TenTec] Jupiter/LDG AT-11MP Tuner
Note also that the KAT2 automatically reduces power to no more than 3 watts
during the tuning cycle, both to protect itself and to protect the K2's finals.
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