[R-390] CV-157 SSB converter

[Bill Hawkins]

That's a good source, Norm.

The manual says the 157 was designed to recover both upper and lower
sidebands.

It does not clearly state that these are sidebands of a suppressed 100
KC carrier.

*** Has anybody used one of these on the SSB signals available today?
***

As the manual says, the 157 was designed to provide the equivalent of
two multiplexed telephone lines to channels A and B.

Maybe a channel can deliver a plain telephone voice signal. Really don't
know if it works without the 100 KC carrier.

The control labeled AFC that looks like a circle with two dots on it is
actually a disk driven by a motor shaft that turns a variable capacitor
that trims the local 100 KC oscillator to match the received 100 KC
suppressed carrier.

Like so much of what Collins did, it was the peak of what you could do
with vacuum tube technology at the time.

Bill Hawkins

-----Original Message-----
From: Norman Ryan
Sent: Wednesday, February 19, 2014 6:09 PM

This link looks like as good as any -- a nice clean pdf copy:
http://www.militaryradio.com/manuals/CV-157/cv-157-tm11-266.pdf