EMRFD Message Archive 2458

Message Date From Subject
2458 2008-11-29 09:18:01 WA0ITP Crystal Size for VXO
Has anyone experimented with the "pullability" of crystals of different case
sizes in a Super VXO circuit?

I'm building up a super vxo and would like to know if an HC49/U, an be moved
more than an HC49/US, or a cylinder style. I'm guessing that the /U will pull
more than either of the others, but I have no data, yet..

TIA for any info.

-----------------------------
I love this radio stuff !
72, 73 Terry, WAØITP
www.wa0dx.org/wa0itp
www.4sqrp.com
www.hams4u.com
www.qrpspots.com
2459 2008-11-29 15:51:29 bobtbobbo Re: Crystal Size for VXO
2460 2008-11-29 18:06:40 wimmie262000 Re: Crystal Size for VXO
You did not mention the frequency. But if a ceramic resonator is
available you might want to consider using that for a VFO. That seems
to provide a wider tuning range than a crystal.
Just some links:
http://www.qsl.net/vu2msy/homebrew/Ceramic_Resonator_VFO_VU2ITI.pdf
http://www.qrp4u.de/docs/en/Oscillators/index.htm
http://www.jason.brown.dsl.pipex.com/M0DAD/construcion/40m_dsb_transceiver.htm
http://www.noding.com/la8ak/12345/n19.htm

Joop
2462 2008-11-29 19:21:49 WA0ITP Re: Crystal Size for VXO
Thanx Joop, I hadnt considered them, I'll take a look.
-----------------------------
I love this radio stuff !
72, 73 Terry, WAØITP
www.wa0dx.org/wa0itp
www.4sqrp.com
www.hams4u.com
www.qrpspots.com


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