Topband: Xtal Filter

[Bruce]

Tried it a few years ago as an experiment.  Broke the antenna coax center 
lead and inserted the crystal. Worked great on one frequency. Would have 
been even sharper with a crystal holder capacitance balancing circuit like 
communications receiver xtal filters of the early years.  One heck of a 
roofing filter for one frequency only.  Now if someone had a switchable 
crystal for every 160 meter frequency.

73
Bruce-K1FZ



> I believe there is a 1825 KHZ xtal filter sell somewhere, can any body 
> share their experience about put a narrow XTAL filter in front of their 
> recv ? (CW works only)
 
> Ir Moeh AntonHendra