You could use a ceramic resonator but you might need a different circuit.

Either of the crystals you mention will work. However as mentioned by
another poster 3.6864 isn't in the CW part of the band. Personally to avoid
dissappointment I'd advise against 3.579 too: there isn't much activity
there. 3.560 is the standard QRP calling frequency and there's plenty of
activity there. You can get 3.560 crystals, try
http://www.jabdog.com/crystals.htm amongst others.

Alternatively you can get use a 3.579 crystal and modify it down to 3.560.
See this page on my web site for details
http://www.hanssummers.com/radio/penning/index.htm.

Hans G0UPL





"Chris" wrote in message
...
This is my first visit to this newsgroup...I am a new MI3.

I would like to put together a very simple QRP CW transceiver. The
schematic
I am using includes a 3.560MHz crystal oscillator.

Maplin's, Farnell etc. sell 3.579545MHz or 3.686400MHZ crystal oscillators
respectively and I am wodering will these do the job or should I be
looking
for a 3.560MHz crstal? The circuit does have a 65pF trimmer capacitor for
tuning but I want to sure about the crystal before I order.

Thanks for your help.

Chris