Quote:
Originally Posted by old_tv_nut
Rolling up or down shows that you are changing the frequency, but if you can't get it to slow down to zero beat with point J grounded, there is something wrong in the oscillator (or maybe control) circuit. The caps you replaced would not be critical unless completely dead or very wrong values. Look for trouble with the cap values in the oscillator and control circuits.
C112, C118, C114, C111, C108. Due to C108, there should be no 3.58 MHz energy whatsoever at point J, only the low frequency beat note.
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I can see what you mean with C108, high freq filter, not sure what C109 does with it, orange drop through r167, as I mentioned, I intend to go over them this weekend.
As you can see above, c98 was WAY out of tolerance (low) for 20% C99 just barely inside (high)
C100 OK , C101-104 2 within , 2 out of tol for %5...
I just hope that this won't be the same for all caps in the set
06-13-2019, 02:29 PM
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