[R-390] The R390/R390A front end, is there any other receiver with anythi...

[ToddRoberts2001 at aol.com]

In a message dated 5/9/2005 2:35:24 PM Eastern Standard Time, 
jsullivan10512000 at yahoo.com writes:
Does anyone know if any other receiver has ever been
built, that had such a profound front end, with 2 or
even 3 R.F. stages, three I.F. frequencies, two of
them variably tuned, that helps give profound
performance. 

I think the R-390/R-390A receivers are pretty much in a class by themselves 
having triple-tuned tracking front ends plus up to 2 triple-tuned variable 
tracking IF's and a third fixed IF. Collins made other receivers that were similar 
design like the R-388/51J-4, R-648/ARR-41  but they were simplified versions 
and had only one variable tracking IF that I am aware of. I think the R-392 
had 2 variable triple-tuned IF's so that is the only other one I am aware of 
that had as complicated a design with 2 variable tracking triple-tuned IF's. 73 
Todd WD4NGG