); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Where does one find this circuit ?
Thanks, Dick, W1KSZ [EMAIL PROTECTED] wrote: > > In a message dated 7/9/2007 01:59:46 Pacific Daylight Time, > [EMAIL PROTECTED] writes: > >> It just an RF bypass capacitor to ground. >> This circuit was embedded in a very small section of a much larger >> paper, so its difficult to find. >> You may even have read the paper and not have noticed the mixer circuit. >> The resistor from the centre tap to ground is selected so that the peak >> drain current is around 28mA or so when the RF is applied > >> RF input ~ 13dBm. >> Input transformer 1:4 turns ratio (or thereabouts) centre tapped secondary. >> Output transformer 2:1 turns ratio (or thereabouts). >> RF bypass capacitor depends on input frequency typically 100nF or so. > >> Bruce > > > Hi Bruce, > > nice circuit. Many questions: > > I wonder how well it works to get a 5MHz source up to 10MHz? > > Also, would you have recommendations on the transformer part numbers? > (MiniCircuits, MaCom, etc)? I think the transformers are probably key to > getting > good phase noise (preventing them from saturating, crosstalk, etc). > > Do you have a suggestion on who makes the best (lowest-noise) JFets? > > Where could we find the original paper's PDF? > > Lastly, how much fundamental attenuation would you expect from such a > circuit? > > Thanks! > Said > > > > ************************************** See what's free at http://www.aol.com. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- 73, Dick, W1KSZ _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
