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Bias a heater supply with humdinger?

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rongon

rongon

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Joined 2009
I'm putting a new circuit into an old beater Eico ST40. I need to elevate the 6.3V AC heater supply by +70V. I can do that, no problem, but this amp has a pair of 'humdinger' pots in the heater supplies. I don't see anything wrong with this, but I'm not an expert, so there always seem to be things I miss.

I've attached a schematic of the situation. How does this look to you?

Thanks in advance...
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  • Elevated Heater Supply with Humdinger Pot.png
    Elevated Heater Supply with Humdinger Pot.png
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