[R-390] Filters

[ToddRoberts2001@aol.com]

In a message dated 2/13/2004 7:13:02 PM Eastern Standard Time, 
n1xas@comcast.net writes:
    I am looking for collins mechanical filters 6KHz and 12KHz to use in a
EAC  R 390A receiver.  Are they available? Who might have them?

Thanks in advance

Jim Smith N1XAS
Hi Jim, Dave Curry Longwave Products makes a 6KHz replacement mechanical 
filter assembly for the R-390A receiver. It comes in an identical-size cylinder 
with mounting flange just like the original filter and wires in as a direct 
replacement with no modifications. The price is high though at $199  plus $4.50 
S&H. They are available from Electric Radio Magazine store. You can see them 
online at  www.ermag.com.  Rockwell Collins also has a line of inexpensive 
torsional mechanical filters in a wide range of bandwidths. You could check their 
website. I am not sure about their prices or minimum order size? Their filters 
are pretty small and one could fit inside of a  tube assembly to fit the R-390A 
if you wanted to make up your own. 73 Todd Roberts WD4NGG.