Quote:
Originally Posted by Radio Wrangler
I agree with Stephen, that there must be something wrong with Howard's sig gen. There are reasons why that design isn't wonderful at the best of times, but his example is a lot worse than I'd expect.
|
The 500pF grid coupling capacitor will allow the 400Hz to settle back to 0V so I don't think you are wrong. The problem is the output does not appear to be AC coupled which would then show the modulation as symmetric. Has the output capacitor been replaced as only a little leakage would look like this on a 10M scope probe.
It would be useful to compare the modulated HT of the two SG's.