[AMRadio] Collins filter

[Donald Chester]

>I am looking for the 6.0khz  filter..Pt #  F-455-J60.. for the Collins 75A4
>Reciever...Tnx Ron W6MAU


Lots of luck.  The trophy collectors have driven the price beyond what one 
used to pay for an entire 75A4.  You can buy a reproduction filter, built 
around a modern Rockwell mechanical filter, with identical or better 
characteristics than the original one, for about $200.  See the ad in 
Electric Radio.  I bought one of those, and have an original 75A4 AM filter 
in my other receiver.  To test them out I put both filters in the same 
receiver, and couldn't tell any difference whatever when I switched between 
them.

Don k4kyv