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RE: HK Citation One heater lines

No. Only the phono stage tubes are grounded, just as it's shown in the schematic. BTW the voltages on the rails are about + and -11.5 volts. The 12AT7 and 12AX7 require about 12 volts when using pins 4 and 5 to supply heater current.

However, you might want to measure the voltage across V5 - depending on the filament resistance of the panel lamp the voltage across V5 can be above spec.

I also recommend (and furnish in my power supply kit) 3.6 Ohm 3 watt resistors in the heater supply to accommodate today's higher AC line voltages.

Edited to add voltage info.



Edits: 05/17/16

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  • RE: HK Citation One heater lines - Jim McShane 10:15:11 05/17/16 (1)

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