[BC] Phasitron...

[RichardBJohnson at comcast.net]

From: "Jim Tonne" <Tonne at comcast.net>

>I would think that synchronizing carriers by using the carrier telephone system (the standard, in those days)
>would be risky.   One must be sure to use a carrier system that is itself without frequency shift.   Most were . . .

It is called "physical pair," the same stuff you use for remote control. The frequency response may suck, but it is for a single frequency. As long as you get your tone through with a reasonable S/N you are golden.

Cheers,
Richard B. Johnson
Book: http://www.AbominableFirebug.com/