"Ken Scharf" wrote in message
. ..

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).

Maybe they're designed for a circuit with parallel C, not series type..

You're probably intending to make a sweep generator and view the bandpass on
a scope, right? This site has a suitable sweep generator
http://www.intio.or.jp/jf10zl/

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

But you're going to solder the xtals directly to boards for the actual
filters, right? You could make a board pretty easily, all the xtals having
the same pin separation. Lotta drilling.

Inspired by you I bought a bunch of HC-49s on eBay. They will plug into a
DIP socket, which is what I'm using in my measurement jig. Buffered
oscillator running off 9 V, no pulling when I hook up the counter.
http://tinyurl.com/3dpdn

73,

"PM"