Most accurate tyre pressure gauge. Farm tractor tires for sale.
Heath GC-1000 Most Accurate Clock
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 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 sampled and measured, then selected by the receiver (to decode time information). Runs hot if you don't use an external (wall wart) 12 vdc power supply. Comes with a 120v plug and has an internal PS. It will heat a small office when run off the internal power supply. Components dry out over time, and need to be replaced. Provides a 12 vdc rear input for external PS. 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 fair, making the indoor rod antenna absolutely dysfunctional. When you buy one, align the receiver and WWV decoder for best results. Displays 1/10 seconds. Good solution in the early '80s, but with GPS time receivers priced about the same as old WWV units... and hundreds of readily available backup public (open) Stratum 1 time servers accessible on the net -- it's a true antique.Heath GC-1000 Most Accurate Clock – Display
Heath GC-1000 Most Accurate Clock LED Display Closeup. Not locked on to WWV yet. Numeral 3 in seconds is transitioning to a 4. Last number is tenths of a second. Takes a while from startup to lock, expect a few hours to a couple of days (using a long wire outside antenna), depending on signal quality on 5-10-15 MHz. Plug it in, hook up the antenna... and give it lots of time to acquire a signal to set it. Not recommended.
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