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12th July 2007, 03:15 AM
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diyAudio Member
Join Date: Apr 2004
Location: Plainsboro, NJ
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6p15p = SV83 = EL84N. The thing to watch out for is the fragile screen grid.
Follow the general pattern of the Dyna ST35. 12AX7 voltage gain block DC coupled to 6n1p "concertina" phase splitter. Both small signal tubes would be shared between the 2 channels. SS rectify the B+. A separate filament winding, with a CT, for the 6n1p is a good idea. The CT is used to bias the heater off B+, which ensures the heater to cathode potential limit is not exceeded.. Are there any filament windings on the 250-0-250 power trafo?
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Eli D. |
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PP amp using 6p15P
