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1. SPICE battery adapter (19 Replies)
2. HP-Calculators: In Search of Alt. Colours (1 Reply)
3. Problem with MVAR on HP42S (5 Replies)
4. HP 97 replacement printer cog? (7 Replies)
5. How to fix an old HP41cx (11 Replies)
6. EMU42 - Activate 32K (2 Replies)
7. HP 38E Electrical voltages (1 Reply)
8. Why so few 15C/11C application and program books? (22 Replies)
9. HP-48SX ON Key (1 Reply)
10. HP-71 Diagnostics (16 Replies)
11. ACT Analyzer (18 Replies)
12. Huge Program Space on HP-12C Platinum (6 Replies)
13. What should be my next LED HP calculator? (15 Replies)
14. Can programs distinguish between a 67 and a 97? (3 Replies)
15. HP-71B internal summation weakness in Math ROM (17 Replies)
16. HP86 problem (25 Replies)
17. HP41CX, not working. (2 Replies)
18. Using 4/5 AA cells as power source for spice calculators with broken battery clips (4 Replies)
19. Making a chart of GSB/XEQ/GTO/LBL/RTN functionality and quirks (12 Replies)
20. N size batteries on sale (18 Replies)
21. HP 50g normal distribution (7 Replies)
22. HP 7550B Pen Plotter Operating W/Win 10 Help Plz (7 Replies)
23. HP 48G+ (4 Replies)
24. Serial numbers format question (9 Replies)
25. What happened to VM Electronics from HEPAX fame (12 Replies)
26. A current issue with batteries for my HP-35 and HP-67 calculators (4 Replies)
27. Kermit on Android (0 Replies)
28. Video Series on the HP graphing calculators (25 Replies)
29. 97s I/O Pod (6 Replies)
30. Need help in testing HP-71B Card Reader (3 Replies)