Here's the complete list of vacuum tubes used in the set, from the SAMs documentation:

1. RF Amplifier: 5BZ7

2. Osc.-Mixer: 6u8

3. 1st Video IF Amp.: 6CB6

4. 2nd. Video IF Amp: 6CB6

5. 3rd. Video IF Amp: 6CB6

6. 1st. Video Amp-
2nd. Video Amp: 6AN8

7. Video Output: 12BY7

8. AGC Cathode Follower -
AGC Keying: 12AU7

9. 1st. Sound IF Amp.-
2nd. Sound IF Amp: 6AN8

10. Ratio Detector: 6AL5

11. AF Amp. -
AGC Clamper: 6AV6

12. Audio Output: 6V6GT

13. Sync Separator: 6CS6

14. Sync Phase Inv. -
Horz. AFC: 6SN7GTA

15. Vert. Osc. -
Vert. Output: 6BL7GT

16. Horiz. Mult. 6SN7GTA

17. Horiz. Output: 6CD6G

18. Damper: 6AU4GT

19. HV Rectifier: 3A2

20. Diode Coupler: 3A2

21. HV Doubler: 3A3

22. HV Regulator: 6505

23. Chroma Bandpass
Amplifier: 12BY7

24. Chroma Bandpass
Cathode Follower -
Quandrature Amp.: 12BH7

25. Burst Amplifier -
"G-Y" Amplifier: 6AN8

26. Chroma Reference
Osc. Control -
Chroma Reference
Osc.: 12AT7

27. Chroma Sync
Phase Det.: 6AL5

28. "B-Y" Demodulator: 6AL5

29. "R-Y" Demodulator: 6AL5

30. "B-Y" Amplifier -
"R-Y" Amplifier: 12BH7



One thing I also should ask. I could identify and purchase all of these tubes except for #6505. Nobody seems to know what this tube is, and I can't find any literature on it. Is it something propriatory to Motorola?

Hope this helps. From reading the list, it appears tubes 3A2, 3A3, and 6505 are involved in rectification or voltage regulation.