crystal ladder filters
 

Just got the lot of 400+ crystals I won on ebay.
Turns out they are NOT HC49/u rocks, but HC6/U!
Isn't it ture that the larger crystals are better
for use in filters than the smaller one's (higher
Q, less loss, etc?)

Looks like some fun ahead experimenting with
this and maybe a homebrew spectrum analyzer in the
works to scan around 8.3866mhz (in my test oscillator
I'm getting 8.389855mhz, better let the oscillator and
the frequency counter warm up for a while).

Time to smash some surplus 9pin tube sockets up for
crystal socket pins ....