[600MRG] CMSK Initial Test Results

[John Molnar]

TTnx to those reporting!  So far:

Ken XXM had perfect copy in CMSK63.
John XIQ had essentially perfect copy once getting tuned.

The first half hour ran well.

However, after restarting in CMSK31 for the second half hour run my PA
tripped off due to SWR.  I switched into dummy load, and PA and outboard
LPF were fine.  An analyzer check of the antenna was not pretty.  I checked
the tuning box outside and nothing immediate jumped out, so we'll deal with
that tomorrow.

The SWR protection scheme here is simple.  Reverse voltage is sampled
with an op amp that drives the a/d converter of a PIC processor, which also
watches PA current and voltage.  If preset parameters are exceeded, a relay
is activated that opens the drain supply.  This is a work in progress and
was a clip lead special tonight as the test was a long key down session for
sure.

Again, thanks to the reporters.  No conclusions at this time yet but
obviously CMSK63 works as a possible keyboard QSO mode.

John XKA