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RE: Heater lines

There doesn't seem to be a CT for the heater, despite what the schematic shows. I tried adding 200ohm resistors to the heater cables to ground. No effect, so I removed them. I think there is an internal leak in the PT.

Now I wonder about the fact the manufacturer used the unused pins on the 5Y3 rectifier socket as tie points for the heater cables coming out of the PT. Kinda close, causing EMI noise? Probably not, since we have determined the noise is likely in the signal path.

Thanks for suggestions.

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