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The Set: Pete Deksnis's Site about the CT-100

Restoring a Vintage Color Television Set

Tube Inventory at Start of Restoration
L = legacy | P = probable legacy | N = not legacy | hyphen = missing tube
V tube-type date mfg. L P N function
1 6BQ7A LA RCA X rf amp (cascode)
2 6AF4 ? ? X local oscillator
3 6U8A 58 04 GE X 1st video IF
4 6DC6 ? RCA X 2nd video IF
5 6DC6 4 13 RCA X 3rd video IF
6 6DC6 4 13 RCA X 4th video IF
7 6AN8 ? RCA X 5th video IF / color killer
8 6CL6 4 04 RCA X 6th video IF
9 6CL6 ?-43 RCA X 1st video amp
10 6AN8 ? RCA X 2nd video amp & Q phase splitter
11 6AN8 4 04 RCA X H sync separator / AGC keying
12 6AU6WA 60 26 RCA X 1st audio IF
13 6AU6 4 13 RCA X 2nd audio IF
14 6AL5 4 13 RCA X ratio detector
15 6AV6 4 13 RCA X af voltage amp / agc clamp
16 6AQ5A VFD SYL X af power amp
17 12AT7 58 09 GE X V sync separator / sync amp
18 12BH7A ND RCA X vertical oscillator / output
19 12AU7 ? DAY X convergence amp.
20 6SN7 - -       horizontal oscillator & afc
21 6CD6GA 6043 CBS X horizontal output
22 6AU4 ND RCA X damper
23 1X2B 61 13 WES X focus rectifier
24 3A3 4 09 RCA X high voltage rectifier
25 6BD4A 430 RCA   X high voltage regulator
26 6AN8 ? SYL X chroma bandpass / burst amp keying
27 6AN8 ? RCA X burst amp / 1/2 chroma sync phase det.
28 6AN8 4 09 RCA X Q amp / 1/2 chroma sync phase det.
29 6AN8 ? RCA X 3.58 mc osc / reactance control
30 6BY6 4 04 RCA X Q demodulator
31 6BY6 4 04 RCA X I demodulator
32 6AN8 4 09 RCA X I amp/phase splitter
33 12BH7 ? RCA X green adder & output
34 12BH7A A06 RCA X blue adder & output
35 12BH7 ? RCA X red adder & output
36 6BC7 MF RCA X dc restorer
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Last Updated on 6/13/99