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I have a GE set which uses a 5-tube chassis...can't remember what the tube numbers are, but the functions are:
1. Horiz output & damper
2. Vertical output, oscillator, and feedback diode
3. Video output and AGC keying
4. 1st and 2nd IF
5. Sound detector and output
This set does not have a seperate horizontal oscillator tube or transistor that I can see...somehow it uses feedback off the flyback to make the oscillator work.
I think in the set in question here it uses a transistor for the horiz osc and it probably has the IC sound discriminator and transistor audio output.
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