If in fact the Frequency Shifter uses a quad. osc, then they've
done it the right way and I might buy one! I was curious about
that.

That part of the circuit is required in correct a problem inherent in
the 1496's design - it only issues a 40db cut of the opposing
sideband. A corrpsponding signal 90 degree out of phase with
the originalis required (via the quad. osc) iin order to phase
cancel it out altogether, thus giving you true phase shift.

Tim,

if you can get to the scanner, let me see the schemo, if you can.
Dieter needs not worry - for $170 for the completed module,
there would be little reason to attempt to replicate it from scratch
- that would end up costing someone a lot more $$!.

> Tim
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