Hi Steve,
you see this link
http://daten.ws-mack.de/Freigabe/kvg.../Kat2/8_F4.pdf

My crystal is 155.520 Mhz.

I will make some test as you have suggested to me.

Merry Christmas for all.

IK6GQC Rocco


"Steve Nosko" ha scritto nel messaggio
...
Do you know what load they are cut for? That osc is for overtone
operation
and those usually run the crystal in series mode.

Start using Google more... This may be just what you need.

http://www.sss-mag.com/pdf/saosc.pdf
I'm not familiar with MESA's, but If this is the crystal type, this may
help.
It is just for MESA resonators and appears to say they are series cut. It
also looks like a good general reference on crystal characteristics as it
shows the typical resonances at the overtones.

http://www.icmfg.com/crystaloscillatordata.html
If I thought they were parallel load xtals, I'd start with the fundamental
Colpitts if they are parallel crystals, but a tuned circuit may help to
improve the phase noise.

73, Steve K,9.D;C'I



"Mario Bros" wrote in message
...
Hi folks,
I have acquired of the MESA Quartz Crystals to approximately 160 Mhz
fundamental AT.
Someone knows some circuit for their use?
73's de IK6GQC Rocco