[R-390] Thanks and need a 4kHz filter

[roy.morgan at nist.gov]

Quoting "FISCH, MICHAEL" <mfisch at kent.edu>:...
> The 4kHz filter in my IF is bad,... are the filters
> on American Trans-coil IFs generally good (i.e should I buy one for spare
> filters)?...

Mike,

Congratulations on getting your radio running.

About the American Trans Coil IF decks:

- As I understand it, they sold or transferred their stock of R-390 parts to a
fellow who's on the list.  Maybe he will speak up and say whether he has any
IF's left.  It may be that they are all gone.

- I bought one way back when they were offering them. You got a srtipped out IF
deck with not very much left on it but the filters.  I have not used any of the
filters yet, so can't say if they are ok or not.

- The 4 kc filters seem to have failed more often than other bandwidths,
possibly because they are used most.

- Dave Curry of Long Wave Filters, I think, sells new filters that fit the
R-390A.  These have gained a fine reputation in the 75A-4.  See most any
Electric Radio for the ad, or the ER website for more info.  The most
experienced Collins restorers I know heartily recommend them.

Roy
K1LKY


Roy Morgan
13033 Downey Mill Road
Lovettsville VA 20180