[Elecraft] [K2] Crystal filter impedance

Hi How must be K2's variable-bandwidth crystal filter in/out impedance (W2,W3 points) with FL1 1.5 CW choosen? Thanks in advance Sergey 4Z5TV -- View this message in context: http://n2.nabble.com/K2-Crystal-filter-impedance-tp4141621p4141621.html Sent from the Elecraft mailing list archive at

Re: [Elecraft] [K2] Crystal filter impedance

Sergey, I believe the crystal filter is designed for 150 ohm termination - at least that is the input termination used with the -5dB post mixer amplifier pad, and since the IF filter is symmetrical, its input and output impedances should be the same. The design point for the variable filter