Vintage Heathkit Model Gc-1005 Digital Alarm Clock (nixie/neon Style) Panaplex
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Vintage Heathkit Model Gc-1005 Digital Alarm Clock (nixie/neon Style) Panaplex:
The GC-1005 was the first in a series of line-powered Panaplex display clocks from Heathkit, introduced in 1973.Time is kept from a Mostek MK5017 PAA integrated circuit. The 5017 had several variants (MK5017AA, MK5017P and MK5017A) but was always a 24-pin dual-inline package (DIP). It was Heathkit part number 443-601.The clock uses three Sperry (Beckman) SP-352 two-digit Panaplexgasdischarge displays. The displays were designed to fit in matching sockets, the CS-352. Although not used by the GC-1005, Dionics made chips like the DI-770 (DI-770N) and DI-297 (DI-297N) that could drive these Panaplex displays.These clocks are now three decades old, and one common problem that seems to appear is a "flicker" in the display, especially when the '1' digit is displayed. My clock has a very mild flicker in the last digit at times, but very stable most of the time. Replacing old SP-352 displays with new ones seems to fix the problem, however some additional information appeared in the Heath 1973 Technical Exchange Bulletin.
The above mentioned is useful information I've found out about this clock. As far as cosmetics, it appears as though the kit builder most likely touched the bottom part of the case with a soldering iron (see my pictures). Also, the little rubber "feet" are all missing. Other than that, the clock is in very nice overall condition!I have tested the clock, and it keeps good time. Due to it's age though, I have to list it As-Is.On Jun-20-13 at 08:43:28 PDT, seller added the following information:
Note-There's a website out there that will let you download the user manual for this clock, but for some lame reason I'm not permitted to add it to my listing!