I had a similar requirement a couple of years back. I ended up using a $10 VCXO, and a $20 Jupiter GPS. The circuit used was the one on page 12 of http://g4jnt.com/DDSVHFBeaconDriver.pdf by G4JNT. It just scraped in under $50
Dave Ww2r Message: 4 Date: Sat, 24 Nov 2012 09:01:25 -0700 From: Joseph Gray <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Subject: Re: [time-nuts] 12.8 MHz OCXO Message-ID: <CAF7oPz2tiZTtqnmrp+xarCTowiJ==yqcgwk1_ebnozfdvna...@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Mike, Surprisingly, it isn' as uncommon as I first thought. The problem seems to be the cost, however. If I can't find something within my budget, I'll have to improvise. Joe Gray W5JG On Sat, Nov 24, 2012 at 1:53 AM, mike cook <[email protected]> wrote: > > Le 24 nov. 2012 ? 09:26, Joseph Gray a ?crit : > >> Can anyone recommend an inexpensive 12.8 MHz OCXO that outputs a sine >> wave? I've looked online, but the only ones I find costs hundreds of >> dollars. Anything 0.25 ppm or better is fine. A Vcc of 5-13.8 VDC >> preferred. >> > An uncommon OCXO freq. If it is for hobby use, I would suggest using a more common quality reference and locking a cheap 12.8 vcxo / vctcxo to it with a pll. >> Joe Gray >> W5JG _______________________________________________ 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.
