Today's Mystery Guest (RCA CTC-4)

[Phil Nelson]

Originally Posted by Phil Nelson

You mean, disconnect terminals B and E, and then connect junction of C211/R250 to pin 1, right?

Okay, with that lash-up, I see a regular waveform at L42 (pin 3 of the oscillator). This is with no signal to the receiver and a high sweep rate.



If I supply a color bar signal at the video amp and slow down the sweep rate, I see a more complex waveform; the amplitude of this one goes down if I turn down the Color control.



Not sure if the second trace proves anything, but it was interesting to look at.

Incidentally, with nothing connected to the primary (terminals B-E), it still measures 6.8 ohms as given in the Sams manual.

Phil Nelson