Variable bandwidth crystal filters

[Alan Bloom]

I really like the way the variable-bandwidth crystal filter works in my
Wildnerness Radio Sierra QRP transceiver.  Since that radio had the same
designer (Wayne N6KR) I assume the basic technology is the same.  i.e. a
varactor-tuned crystal ladder filter.

Any guesses on when the variable-bandwidth crystal filters will be
available?  Any guesses on what bandwidth ranges they will likely cover?

Al N1AL


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