EWBrown wrote:
I'd go with two uF4007s or uF5408s, two 100-220 uF / 450 V caps, and use the choke that is already in place, just disconnect it from its two barrier strip connections, and connect it between the + end of the two added external caps.
Connect a 50 ohm (or higher value) 2W resistor to the two barrier strip locations where the choke was connected. Since the 6SL7 by iteslf draws very litle current, a larger resistor could be used, anything 100 ohms to 1K (or even higher) , the actual current consumed by the 6SL7 is around 1.2 mA total. A 1K resistor is going to offer a 1.2 VDC drop, so it is rather insignificant. The idea is to get about 150VDC "resting" voltage at the plates of the 6SL7.
HTH
/ed B in NH
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