Dan Rae wrote: > Richard W. Solomon wrote: >> The GPSDO I want to use has an output rich in harmonics. In some >> cases that is good, but Murphy rules and in the application I have >> today, it is not good. >> >> I need a 10 MHz Band-Pass Filter, Bandwidth is not critical, something >> small with SMA connectors would be ideal, but I can live with BNC. >> >> Anyone have such a beast or know where I can get one ? I checked >> Mini-Circuits >> and choked on the price !! >> >> > > Dick, it is really easy to build one. The wonderful (free!) filter > design program ELSIE will give you all the help you need. I would have > thought an hour or so with a couple of toroids would do the trick. Even > just a Low Pass filter would usually do to turn a square wave into a sine...
It's actually much better to use an LPF than a bandpass filter if you don't have subharmonic energy to deal with. An LPF with a cutoff midway between the fundamental and the 2nd harmonic will show much less tempco (in the form of phase shift over temperature) than a bandpass filter. John _______________________________________________ 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.
