Hi everyone,
I'm restoring a 1740A back to health again and its up and running but some form of calibration is now required.
- I have a Heathkit IG 4505 calibrator and the volts / div is pretty accurate with the exception of the 100v setting, scope reads 90v?
- The width of the trace is more than the screen, by about twice the screen width and I don't seem to be able to find in the service manual how to adjust this aspect?
- Sometimes there is another wave superimposed on the screen but of a far lower
- Also there is visible on some timebase speeds more than others, visible flyback lines and in instances it looks like another trace in the background?
If I can find out to link photos etc from my Flickr account I could show you these in photo and maybe video formats to give you more of true picture of whats happening then rather hoping that I can describe?it well enough so you can understand what I mean.?
Anyone able to offer any assistance with this at all? I have the service manual but it does not make it very clear on how to do these things unless of I'm going blind.
Graham
