Aren't those Isochromes lovely? Just the prettiness and the name itself seems to make spending $10K so much more worthwhile:-) The FE-5660 is one of those featured in the FEI 12 page Rubidium Standards brochure that's available online, not much data though and I've never seen a manual, but most of the more recent ex-cellphone units seem to have been the FE-5680s. Some FE5660s, from Tait T801 UHF base station references, became available on the UK surplus market a few years ago and I've always considered them a possible equivalent of the Efratom FRS series, physically and electrically quite similar, but have never considered either to be an equivalernt of the PRS10. They do all share the same case and connector style, as well as pinout, so perhaps made to another common telecom standard at least in that respect, but the PRS10 has a 1PPS conditioning option that neither of the others do and I seem to recall it also has lower phase noise, so I suspect someone is being a bit optimistic. Regards Nigel GM8PZR
In a message dated 27/03/2014 17:40:55 GMT Standard Time, brucekar...@aol.com writes: Recently I happened across an eBay listing for an Antelope Audio Isochrome, a device that apparently packages an SRI-PRS10 rubidium oscillator and distribution amplifier in a box and sells to audiophiles for a price in the $10K range. For the fun of it I searched eBay for Audio Isochrome and found a number of listings. Clicking on the lowest priced (eBay 271432562792) for $4,500, there is a note that the SRS-10 has been replaced with a FEI-5660 which is said to be a PRS-10 equivalent. Is this the one that has been showing up from surplus cellphone equipment? Bruce _______________________________________________ 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. _______________________________________________ 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.