Re: {Collins} 51J-4 filters

There is a note in the archives of this reflector from me that forwarded an email from the Collins company
 regarding using their other 500KHz filters in the 51J-4.  Basically the filters used in the j-4 have a much
 higher input impedance than the later filters (e.g. as used in the 51S-1).

However, given the price of the 51J-4 filters, it shouldn't necessarily stop us from trying to use these
 other filters.

Bill, ve3jhu

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