purchased from    



Circuit : Input valve is a high mu 6SL7 Double Triode, in Mu circuit configuration, capacitively coupled to the 300B Directly heated power triode, in Single Ended Class A. The design incorporates a Grid Choke.

B+ power is valve rectified (5Z3P) and choke smoothed.

Filament power is bridge rectified.

Note : Shortest possible connection between line input and 6SL7 driver valve.



UPDATE - 6th June 2008

Ordered new 'Perfect Lay' OPT's, Teflon Coupling Caps and DIYHFS Ultra low noise current source filament supply.