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Heath GC-1000 Most Accurate Clock
Usually grossly overpriced on eBay. For under $200 it is a unique clock... and priced right. Many (most) have electrical issues, so plan on troubleshooting and updating numerous components. Needed to change all of the capacitors and power supply in this one, due to heat and age.
Receives time signals from NIST's WWV on 5/10/15 MHz (AM shortwave), the strongest of the three frequencies is automatically selected by the receiver (to decode time signal).
Runs very hot if you don't use an external (wall wart) 12 vdc power supply (and ultimately degrades components). Comes with a 120v plug and has an internal PS. It will heat a small office when run off the internal power supply.
Components (like capacitors) dry out over time, and need to be replaced. Provides a 12 vdc rear input for external PS, good solution for reducing heat.
Can be very problematic, and without a good outside shortwave antenna it will not update frequently (maybe once or a couple of times a day... on a clear day). Receiver is only mediocre, making the indoor rod antenna dysfunctional. When you buy one, align the receiver and WWV decoder for best results. Displays tenths of seconds.
Good solution in the early '80s, but with GPS and CDMA time receivers priced about the same as old WWV units... and hundreds of readily available Stratum 1 time servers accessible on the net for free -- it's a true antique. It should read "Somewhat Accurate Clock". Can't adequately function as a Network Time Server. Not reliable and difficult to interface.
Heath GC-1000 Most Accurate Clock
Usually grossly overpriced on eBay. For under $200 it is a unique clock... and priced right. Many (most) have electrical issues, so plan on troubleshooting and updating numerous components. Needed to change all of the capacitors and power supply in this one, due to heat and age.
Receives time signals from NIST's WWV on 5/10/15 MHz (AM shortwave), the strongest of the three frequencies is automatically selected by the receiver (to decode time signal).
Runs very hot if you don't use an external (wall wart) 12 vdc power supply (and ultimately degrades components). Comes with a 120v plug and has an internal PS. It will heat a small office when run off the internal power supply.
Components (like capacitors) dry out over time, and need to be replaced. Provides a 12 vdc rear input for external PS, good solution for reducing heat.
Can be very problematic, and without a good outside shortwave antenna it will not update frequently (maybe once or a couple of times a day... on a clear day). Receiver is only mediocre, making the indoor rod antenna dysfunctional. When you buy one, align the receiver and WWV decoder for best results. Displays tenths of seconds.
Good solution in the early '80s, but with GPS and CDMA time receivers priced about the same as old WWV units... and hundreds of readily available Stratum 1 time servers accessible on the net for free -- it's a true antique. It should read "Somewhat Accurate Clock". Can't adequately function as a Network Time Server. Not reliable and difficult to interface.