{Collins} 75A-4 Filter Pin Outs

We have a receiver that we think has been modified with a socket intended to accept a 75A-4 mechanical filter (the filter is missing).  Can someone supply the pin-out connections for the 'A-4 filters?  With that information we can compare the wiring of the socket with the pins on the filter to see if our theory holds water.



Richard Dillman
Maritime Radio Historical Society

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