Thanks Brian - a useful tip. David
>>> <[EMAIL PROTECTED]> 14/04/08 15:50 >>> David- Although you are likely OK being at VHF, please keep in mind that some of the low-freq "clock" type oscillators have poor phase noise when it comes to trying to copy signals like CW. A good easy test is to listen to one of the oscillators on a good general coverage RX and see how "good" the CW note sounds. If you're happy with it, then its use as a LO for a transverter is likely OK. Also remember that modes like PSK31, WSJT, etc. will want slightly better LO phase noise to function well. But the CW listening test is a simple easy place to start. 73, Brian, WA1ZMS/4 -------------- Original message from "David Hilton-Jones" <[EMAIL PROTECTED]>: -------------- > I want to generate sine wave signals at 42MHz and 116MHz for use with VHF > transverters. A simple tcxo isn't stable enough. I'm looking for simple/cheap > solutions and I'd appreciate any comments. > 1) I have a stable reference at 10MHz available > 2) Reflock is overkill > 3) I guess a G8ACE type ocxo would do for 116MHz. > 4) I read with interest about FlashCrystal units, but they now seem > unavailable. > 5) On e-bay international I see McCoy/Vectron ocxo at 48.xxxxMHz (can't > remember > exact frequency) - that might do for my 42MHz requirement , with some mods to > the rest of the transverter. Any UK source? > 6) I don't know much about DDS systems. > > Any comments much appreciated. > > David > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
