Quote:
Originally Posted by Argus25
if the output from the filter is disconnected from the V osc, it changes its properties. So ideally to do it, the V osc is stopped and the scope is put on the valve's grid, so the final sync pulse you see there also includes the effects of the blocking osc transformer and is the actual pulse that triggers the V osc.
20V ripple seems very extreme for the supply of a V osc.
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Hi Hugo,
The sync in these sets is inserted at the anode not the grid.
In the TV32 that I'm finding sensitive to ripple I have 600mV of ripple on the HT. I tried decoupling the anode feed to the sync separator and gave it a clean supply but it would appear that it is the oscillator that is problematic. Placing a modern 250uF electrolytic on the rail certainly helped.
Peter