Hello Friends, I am picking up locally a couple of vintage analog Radio Shack SW time cube radios, 70s vintage, 3 switchable SW frequencies. Two types, the one pictured and a Radio Shack model also that has WWV and Weather channel VHF frequencies. I am interested in an accurate bench test to compare the analog shortwave radios time reporting hopefully UT-1 against other available references. For accuracy, and repeatability. Could eventually add an SDR to the mix, too. The 5,10,15 mhz radios obviously are subject to the WWV Ft Collins site, propagation distance delays, somewhat calculable, and the vagaries of Ionospheric propagation, and, propagation delays between the antenna and the measured tap point to the seconds ticks of WWV. I have some friends, microwave professionals, who are also hams here in Auburn who may enjoy doing a bench test, with published results, etc. But wonder if anyone else would be interested in borrowing a RS Timecube radio (and/or use an SDR) and designing an accurate bench test against available modern standards? We are talking probably HUGE UT-1 errors compared to what this group plays with, and that is OK but I think still a worthwhile test, especially if the errors using available and cheap equipment are predictable, and repeatable. https://forums.qrz.com/index.php?attachments/dscn1187-jpg.400844/
Another question: Re precision frequency measurements of spacecraft carriers at earth ground stations. I have found a number of MASER labs, willing to help measure a 70 cm UHF carrier of a satellite planned mission, circling the moon. Fun, and overkill yes . But I would like to know if the MASER extra 3 orders of magnitude precision frequency measurement (over Rubidium, Cesium) is useful, or utterly wasted in measuring a lunar orbiting spacecraft frequency over as long a period as a month, in a coming satellite mission? Or, are Rubidium and Cesium and GPS disciplined references plenty accurate for accurate spacecraft orbit determinations? Best, 73, Pat Barthelow AA6EG apol <[email protected]>[email protected] *"The most exciting phrase to hear in Science, the one that heraldsnew discoveries, is not "Eureka, I have found it!" but:* "That's funny..." ----Isaac Asimov _______________________________________________ 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.
