[R-390] Off-topic IF question

[Richard Loken]

On Mon, 7 Jan 2002, Scott, Barry (Clyde B) wrote:

> My thinking is that if it uses crystal filtering, 465kc crystals might be
> harder to find that 455kc.  True?

You will look long and hard in a 19 set to find any crystal filters and casual
listening will confirm their absense.  IMHO the 19 set was a crummy radio even
in 1940 but it was a true transceiver which was very innovative when Pye 
designed it in the late 1930's.  It is loaded with single letter G tubes like
6K7G's and they frequently used the unused shell ground pin for a tie point so
don't go willy nilly subbing in 6K7's for 6K7G's.

The US army went to 10M FM for field communications (I think it was around
10M?  No?) and armour communications in WWII but the commonwealth stayed on
2 - 8MHz AM and on a good day they could almost hear each other.
---
   Richard Loken VE6BSV, Systems Programmer - VMS  
   Athabasca University
   Athabasca, Alberta Canada
   ** richardlo@admin.athabascau.ca **