Collins 75S3B 2.1 Kc Filter

Glen Zook gzook at YAHOO.COM
Fri Feb 14 03:46:03 EST 2003

I made up an adapter for an extra 2.1 from the 75S-3B
series to fit the 75A4 and it works fine.  Haven't
looked at all the "fine" points, but don't notice any
difference in performance.

I recently came by several Murata crystal filters that
I have been meaning to try in the 75A4.  Don't know if
those will work or not.

Glen, K9STH

--- k7mks <k7mks at ATTBI.COM> wrote:

Can anyone tell me if this mechanical filter can be
substituted electrically for the 3.1 Kc filter in a
75A-4.  Impedance or load concerns?

Glen, K9STH

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