It may depend on the Heathkit clock you have. I have the original GC-1005 that uses the SP-352 tubes just fine. I do note that the 353 displays have more pins than sockets (pin bent out of the way) so perhaps the 352 is a superset of the 252. In the manual on page 20 it indicates that your display may have 2 extra pins that are simply bent out of the way.
In terms of available parts, I ordered 2 from ebay at: https://www.ebay.com/itm/S2T5-Beckman-SP-352-Gas-Discharge-2-Digits-7-segment-Display/233339783749 Note that they do not test or indicate that they will work "Sold as none (sic) working units, for parts" One display worked fine while the other one had a metal "blob" in the middle of the E segment. It displays only 1/2 of that segment. YMMV The good news is that current capacitors are smaller and probably have longer life than the original. You will probably want to replace C203 (2x20 uF 350V) and C204 (1200 uF 25V). DigiKey would be a good source to check. -Bill- On Monday, April 12, 2021 at 5:20:48 PM UTC-7 [email protected] wrote: > Hello all just found and signed up for the board! Really interested in > what you folks do here. > > Just found a neat Heathkit kit clock at a yard sale and I'm hoping to > revive the little guy. I assume the thing needs these 45 year old > capacitors replaced at some point, but my real issue is with these Panaplex > displays. One display appears to be on it's last legs and another is > completely dead. > > I'd like to go ahead and swap in some "new" ones, but what I thought would > be a simple trip to eBay turned out to be much more complicated. Does > anybody have a source for replacing the SP-252 displays in here? I've > checked with Sphere Research and they do not have any in stock. > > Thanks in advance! > -- 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/19d876cb-9336-4a98-b8c8-4ebc009549bfn%40googlegroups.com.
