Brad Stockdale wrote: [ ... ] > Anyway, on to the reason for this post... I'd like to get some > receivers so I can HEAR and USE the WWVB, WWV, and WWVH signals... I > know that HEARING them may not be a 'normal' request, but I just > would like to monitor the audio as well as being able to decode the signals... broadcast ranges.
[ ... ] > Can anyone suggest a kit, or project listed online with > schematics and parts lists, or I guess even reasonably priced commercial > units? > > If I can't get radios that have built in decoders for these > stations, I'd be happy just receiving their audio and then trying to > build my own decoder using a PIC or something... If you don't mind a big, heavy box, the HP 3586[A,B,C] selective voltmeters are absolutely wonderful tools for any sort of LF/HF measurement. They tune from 20 Hz to 32 MHz and have narrow 20 and 400 Hz filter bandwidths, as well as a voice-bandwidth filter (the width depends on the model and option). They read amplitude to 0.01 dB and can count a received carrier to 0.1 Hz frequency resolution. They have a speaker and line-level audio output, but no decoder. They also have a GPIB connector, so you can use a computer to tune and read frequency and amplitude. The "C" model is the best for lab use, because it has 50/75/600 ohm input options, and uses standard BNC and binding post input connectors. The A and B models were designed for telco use and have slightly weird input impedances and connectors, but nothing to stop them from still being very useful. They sometimes go on eBay for <$200, which is a steal in my book. They weigh about 50 pounds, though, so aren't exactly portable. 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.
