Hi have the same 6 digit Heathkit. I do have the complete schematic if you need it. My issue (not solved yet) is the power transformer runs too hot to touch. All my voltages are good and the clock still keeps time - I built it back in '77
On Sunday, January 17, 2021 at 11:33:47 PM UTC-8 Dekatron42 wrote: > There is one MK5017 clock that uses PNP transistors in the book I scanned > which you can download from here: > https://groups.google.com/g/neonixie-l/c/Ov-mzZ_pDig/m/G95NMJPKBQAJ it > doesn't seem to use SP352s but at least a Panaplex display. > > /Martin > > On Monday, 18 January 2021 at 04:59:28 UTC+1 N9KTW wrote: > >> Yes, thank you I have seen it. I am currently trying to make a schematic >> of the power supply that is on the clock that I have. I have no voltages >> higher than about 125 ish in the clock. The 15Volt for the chip is derived >> from a zener on a 55 Volt line. Also Heath uses NPN transistors , and my >> unit is using PNP's. I am going to look and see if I have any other >> panaplex clock diagrams ....... >> >> Howard >> >> On Sunday, January 17, 2021 at 7:23:39 PM UTC-6 J Forbes wrote: >> >>> did you see this? >>> >>> http://www.decadecounter.com/vta/pdf/gc1092d_schematic.pdf >>> >>> >>> On Sunday, January 17, 2021 at 3:35:14 PM UTC-7 N9KTW wrote: >>> >>>> Well I found another clock to work on, using SP352 displays........ It >>>> is marked DIGITAL CONCEPTS CORP, EC102 electronic calendar clock. >>>> >>>> It uses 3 SP352's for a 6 digit display. A MOSTEK 5017BA chip to run >>>> things. >>>> >>>> The display doesnt light up, at all. In attempting to check voltages, I >>>> cannot find any above about 125 (this seems VERY low for the panaplex >>>> displays) I have been told that this is similar to a HEATHKIT GC1092d. >>>> >>>> Anyone got any ideas, maybe a schematic for this guy????? >>>> >>>> T I A >>>> >>>> de Howard, N9KTW >>>> >>> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/caa9fde9-c6b9-4900-8ad2-f739c5c9f6ecn%40googlegroups.com.
