[Boatanchors] Manual request / HF squelch comments

[Dave Maples]

All: I'm looking for a reproduction of the Motorola F2338 Interlink manual.
This is the HF-VHF bridge device, and I'm interested in studying how the HF
squelch circuit works.

If anyone else has a suggestion for a non-carrier-driven HF squelch circuit,
I'd be interested.  I've seen two different approaches, and both seem to
have some value, but I'm still interested in some improvement (and I can't
afford $600 or more for a JPS voice-modulation recognition unit).

Side thought: I sure wish someone would come out with a
relatively-inexpensive DSP-based HF squelch, but there's probably no market
for it...

Thanks,
Dave WB4FUR