PP amp using 6p15P

pwan · 11th July 2007, 05:16 AM

Hi,

My friend having 6P15P, 6N1P, 12AX6 & transf 250-0-250 - 250ma) around. Could you advise the good PP schematic that make use of these parts?

Thanks!

Eli Duttman · 12th July 2007, 03:15 AM

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?

11th July 2007, 05:16 AM	#1
pwan diyAudio Member Join Date: Apr 2006 Location: Earth	PP amp using 6p15P Hi, My friend having 6P15P, 6N1P, 12AX6 & transf 250-0-250 - 250ma) around. Could you advise the good PP schematic that make use of these parts? Thanks!

12th July 2007, 03:15 AM	#2
Eli Duttman diyAudio Member Join Date: Apr 2004 Location: Plainsboro, NJ	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? __________________ Eli D.

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