You can still buy 9112 and 9301 on eBay but using modern TTL like 7406 (30V Open collector inverter) with a 12k pullup to +12V on the output (like the construction of the 9112) with a 7442 would probably work just as well.
/Martin On Monday, 13 October 2025 at 11:57:44 UTC+2 bogdan paduraru wrote: > > > > Actually I got it from Udo Radke, german collector, his > (homemade)design...I wish I had one from TFK or IEE.. > I asked in the past for some good photos of that board too... it would be > nice to replicate it > > On 12 Oct 2025, at 22:38, Dekatron42 <[email protected]> wrote: > > > > Is it a home-built testing unit or something that Telefunke/IEE designed? > > I had a look at some photos Robert sent me and found that the circuit > board consists of two (2) Fairchild 9112(59) "High Voltage Hex Inverter", > one Fairchild 9301(59) "MSI 1 of 10 Decoder" and the SN7475N "4-BIT > BISTABLE LATCHES" and some resistors and possibly a 5.1V Zener to supply > the SN7475N and Fairchild 9301 with 5V as the two 9112 uses somewhere > between 12-20V to interface to the NIMO. > > /Martin > > On Sunday, 12 October 2025 at 20:36:39 UTC+2 bogdan paduraru wrote: > >> I have a testing module for the xm1000 >> If you " throw it" across Atlantic , I might be able to test it for you >> ☺️ >> >> On 12 Oct 2025, at 20:55, Robert <[email protected]> wrote: >> >> No unfortunately >> >> <image0.jpeg> >> <image1.jpeg> >> <image2.jpeg> >> >> >> >> Thanks >> Rob >> >> On 12 Oct 2025, at 18:51, 'bogdan paduraru' via neonixie-l < >> [email protected]> wrote: >> >> >> Have any photos of the IEE version in action? >> >> On 12 Oct 2025, at 20:04, Robert <[email protected]> wrote: >> >> I’ve got the IEEE version >> >> Thanks >> Rob >> >> On 12 Oct 2025, at 17:47, 'Oskar' via neonixie-l < >> [email protected]> wrote: >> >> https://www.ebay.de/itm/357717828612 >> >> https://www.ebay.de/itm/357732887139 >> >> Not my auctions >> >> -- >> 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, visit >> https://groups.google.com/d/msgid/neonixie-l/90fc1c50-3a8f-4d55-aaba-ca99dd26c002n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/neonixie-l/90fc1c50-3a8f-4d55-aaba-ca99dd26c002n%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, visit >> https://groups.google.com/d/msgid/neonixie-l/51ACD664-39A6-429F-BED2-CB05DB462EDF%40gmail.com >> >> <https://groups.google.com/d/msgid/neonixie-l/51ACD664-39A6-429F-BED2-CB05DB462EDF%40gmail.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, visit >> https://groups.google.com/d/msgid/neonixie-l/B3CEA2D1-957F-46F0-B1A0-70EEC9246EAB%40yahoo.com >> >> <https://groups.google.com/d/msgid/neonixie-l/B3CEA2D1-957F-46F0-B1A0-70EEC9246EAB%40yahoo.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, visit >> https://groups.google.com/d/msgid/neonixie-l/A9BC32C6-E8C0-42F4-A76E-2CD4179E31E8%40gmail.com >> >> <https://groups.google.com/d/msgid/neonixie-l/A9BC32C6-E8C0-42F4-A76E-2CD4179E31E8%40gmail.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, visit > https://groups.google.com/d/msgid/neonixie-l/2bfdb98e-68f7-4d06-a82c-879046279af2n%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/2bfdb98e-68f7-4d06-a82c-879046279af2n%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, visit https://groups.google.com/d/msgid/neonixie-l/4ea8a276-5738-4ca8-9f79-e0fb4d0d57f7n%40googlegroups.com.
