Before delving into expensive replacement, have you done enough troubleshooting to confirm the driver IC is bad ? Those devices are pretty robust, and because they are bipolar (not CMOS), they are not susceptible to ESD damage. You would have to have a rather disastrous event to zap the driver, such as a major voltage spike from the power supply, or the display shorting-out.
Electrolytic caps dry-out and fail over time, and I've even had one short-out. On Tuesday, February 9, 2021 at 7:19:12 AM UTC-8 Nick wrote: > UHP481 on eBay right now... at a price... > > > https://www.ebay.co.uk/itm/UHP481-SemiConductor-CASE-DIP16-MAKE-SPRA/164238975574 > > > On Tuesday, 9 February 2021 at 13:15:22 UTC Ryan B wrote: > >> There is one for sale on ebay right now. I don't know if it is worth it >> to you to buy one just to cannibalize the ICs for another... >> >> >> https://www.ebay.com/itm/Heathkit-GC-1093-Vintage-Digital-Clock-Tested-/154322501862?_trksid=p2349624.m46890.l49292 >> >> Ryan >> On Monday, February 8, 2021 at 8:01:09 AM UTC-8 Sgitheach wrote: >> >>> Hi >>> >>> Perhaps a couple of SN75468 but the pin outs are different so you will >>> need a small adapter board. Or just discrete parts, again on an adapter. >>> >>> Grahame >>> On 08/02/2021 15:38, 'orange_glow_fan' via neonixie-l wrote: >>> >>> Hi >>> >>> I need suggestions on finding a way to replace the hv driver IC's for >>> this clock. It uses one UHP-480 and a UHP-481, Both appear to be made of >>> unobtainium.... >>> >>> >>> -- >>> 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 [email protected]. >>> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/66f4eed3-228e-4dc3-ac00-c383b1af9619n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/neonixie-l/66f4eed3-228e-4dc3-ac00-c383b1af9619n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> -- 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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/61fa4a03-0432-4ca2-8a29-8159890b3a00n%40googlegroups.com.
