[Milsurplus] ARC-2: Smart People Needed

[David Stinson]

----- Original Message ----- 
From: "Ray Fantini" <RAFANTINI at salisbury.edu>
>... tossing up speculation at this point but isn't there a fixed 
>frequency IF stage after the variable IF? Know all the Collins 
>stuff of the late forties and fifties used a variable IF section 
>and then a second converter to a fixed frequency IF on 455 KHz 
>for civilian stuff and frequencies like 500 and 250 KHz for 
>military radios....

The 3rd IF is just a DC amp driving the 4th IF.
That has only a band-pass filter fixed at 1.0-1.5 MC.
So no help there.