Bell and Howell Model 34 Oscilloscope

Go down

Bell and Howell Model 34 Oscilloscope

Post by CHUCKSUE on Tue Feb 10, 2015 2:15 pm

I have started to repair this scope. I can put a signal to the vertical input and see a sign wave on the CRT. I see this only if the sync control is turned all the way clockwise. When I start to turn the sync to the left I loose the waveform at about three o'clock . I have the schematic and the sync control comes off the plates of the 12BH7.
All the other controls seem to work fine. When I loose the waveform I get a vertical line?????


Number of posts : 26
Registration date : 2013-07-04

Back to top Go down

Back to top

- Similar topics

Permissions in this forum:
You cannot reply to topics in this forum