Quote:
Originally Posted by mepurina
For a Signal Source I have used both off air signal from a VHS Deck modulator on Channel 3 and a also a Leader LCG-396 NTSC Pattern Generator.
The HV cage is installed.
Only one tube has a shield and that is the tube at the very front end of the tuner. Does anyone know if this set came with tube shields?
B+ is not used in the IF circuits. Only used in vertical output stage from what I can see on the schematic.
No Yoke wires in this area of the IF strip.
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The IF has to be supplied positive voltage from some B+ rail of some type or it wouldn't pass any signal at all...
If the schematic happens to use the archaic B+, B++, B+++ notation to differentiate the different B+ rails know That I wasn't referring to the B+ rail specifically but to all positive supply rails categorically when I used B+ in a previous post (and I generally refer to it categorically in most posts I make). If any positive rail is shared between the tuner/IF and the horizontal sweep/sync separator that could be a leakage path for the noise you see.