- IN-12 Nixie Tube — Datasheet
- IN-14 Nixie Tube — Datasheet
- IN-16 Nixie Tube — Datasheet
- IN-18 Nixie Tube — Datasheet
- IN-8-2 Nixie Tube — Datasheet
- National Electronics Readout Tubes Catalogue (SB-26F) — Reference
- Nixie Transistor Clock: Brightness Potentiometer Modification
Adds a 10 k potentiometer in the HV voltage-sense divider (at R336) to adjust the supply from full to half voltage; marked 'older version only' on the KABtronics site.
- Nixie Transistor Clock: Hourly Display Shutdown Modification, Rev 2.1
Adds a 4.7 V zener in series with R287 so each hour's shut-off diode works per hour; applies to PCB version 4 and earlier (built into version 5).
- Nixie Transistor Clock: Version 3 PCB 12-Hour Jumper Fix
Backside jumper for a missing through-hole in the hours decode of version 3 boards; affects 12-hour configuration only.
- Nixie-Transistor Clock Assembly Manual, Document 1.7 for PCB Version 5
87-page assembly manual for the no-IC KABtronics Nixie Transistor Clock (6 x IN-12A): parts list, build order, staged high-voltage bring-up, logic tutorial, circuit description, troubleshooting, and the 23-sheet schematic (Rev 5.0, 2013; scanned images, no text layer).
- RL1200 12-Hour 4-Digit Relay Nixie Clock — Schematic
KiCad schematic (2021-08-10) of the 54/55-relay G2R-2 nixie clock: capacitor-sampled relay registers, XOR-coil incrementers, relay decoder trees, CD4521/CD4017 timebase and MC34063 nixie HV boost.
- RL1200 4-Digit 12-Hour Nixie Clock — Board Datasheet (BOM, Placement, Ports)
Bill of materials, parts placement drawing and port list (2021-08-09). Note: BOM omits R11, R33 and C16, and the drawing shows K46, which the later 54-relay board drops.
- The Nixie Tube: Design and Control — Reference Article
- Type 616 Nixie Tube — Reference Document
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