I just ordered the parts for this filter from Mouser Electronics. ~ $30 plus shipping including a shiny new Pomona box.
qty 2 542-78F1R0-RC RF Inductors 1.0uH 10% @ $0.18 ea qty 2 140-50S5-271J-RC Ceramic Disc Capacitors 50V 270pF SL 5% Tol @ $0.14 ea qty 1 140-50S5-471J-RC Ceramic Disc Capacitors 50V 470pF SL 5% Tol @ $0.11 ea qty 1 565-3752 Test Connectors SHLD BOX BNC (M/F) @ $29.12 ea (ouch!) That's 75 cents in parts plus the box. Once assembled I'll sweep it with the network analyzer and report back on tweaks made to get it closer to the simulation. -Bob On Tue, Dec 13, 2011 at 4:08 AM, <n1...@burlingtontelecom.net> wrote: > Paul's simple filter: > > http://www.w1ghz.org/small_**proj/small_proj.htm<http://www.w1ghz.org/small_proj/small_proj.htm> > > Mike > > ----- Original Message ----- From: "Bob Bownes" <bow...@gmail.com> > To: <li...@lazygranch.com>; "Discussion of precise time and frequency > measurement" <time-nuts@febo.com> > Sent: Monday, December 12, 2011 10:11 PM > Subject: Re: [time-nuts] filtering a 10Mhz frequency standard? > > > > Paul Wade did a paper on 10Mhz GPSDO filtering for Microwave Update in > October. It is in the proceedings. I don't know if it is available > elsewhere. > > Bob > > > On Mon, Dec 12, 2011 at 9:17 PM, <li...@lazygranch.com> wrote: > >> I think you would want to avoid crystal filters due to microphonics. >> >> I've found building good LCR filters harder in real life than on paper. >> (I've done plenty of leapfrog active filters from LCR based designs.) I've >> had to make a passive LCR for ADC testing and secondary (parasitic elements >> of nonideal component) come into play. Nowadays I just buy COTS. >> >> >> ------Original Message------ >> From: Chris Albertson >> Sender: time-nuts-boun...@febo.com >> To: Discussion of precise time and frequency measurement >> ReplyTo: Discussion of precise time and frequency measurement >> Subject: [time-nuts] filtering a 10Mhz frequency standard? >> Sent: Dec 12, 2011 5:54 PM >> >> What is the best practice for filtering a 10Mhz sine wave frequency >> standard? I've read that you can do more harm than good. Filter >> parts (caps, resistors and so on) are all temperature sensitive. But >> all those $40 Rb oscillators are putting out a pretty rough looking >> sine wave. >> >> Are some types of filters better. I thought about a crystal filters. >> >> -- >> >> Chris Albertson >> Redondo Beach, California >> >> ______________________________**_________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/** >> mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> >> and follow the instructions there. >> ______________________________**_________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/** >> mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> >> and follow the instructions there. >> > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > > > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ 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.