Version 1.32
2
around you. Confirm that large capacitors are discharged before
working on the amplifier
This valve amplifier kit has been designed to be configurable by the assembler. The
kit can be set-up to work in either Push-Pull (PP) mode delivering approximately 30
Watts per channel, or Parallel Single-Ended (PSE) mode delivering approximately 20
Watts per channel. The argument to using the lower powered PSE mode is improved
sound quality in the mid and upper ranges. PP on the other hand will drive less
efficient speakers and offer a faster bass line. The assembler must therefore decide
which way to build the amplifier to save making unnecessary changes later. If the
amplifier is intended for use in PSE mode, extra components can be purchased to
reduce hum levels in the power supply (this is not a requirement but may assist S/N
ratios on some sensitive speakers).
Opening Your Kit And Checking its Contents
Please note that a mains lead is NOT supplied with this kit due to safety regulations in
the country of its intended use. You will need to purchase an I.E.C. fused mains lead
with a 5-amp fuse fitted in the plug.
Bill of materials for the
Edison 60
kit:
1 x Bottom chassis panel
1 x Bottom cover plate
1 x Front chassis panel
2 x Side panels – left and right
1 x Top panel
4 x EL34 valves
4 x 6922/ECC88/E88CC/6DJ8/6N1P valves or equivalent
2 x Audio PCB’s
1 x Toroidal type mains transformer with mounting kit
2 x Output transformers
The
power supply
pack contains:
1 x Power supply PCB
4 x 220uF 250V electrolytic capacitors (C7,C8,C14,C15)
4 x IN4007 rectifier diodes (D1,D2,D3,D4)
4 x 576K or similar high value resistors (R19,R20,R33,R34)
1 x 100R 7W resistor (R35)
3 x M3 X 30mm hexagonal metal stand-offs
6 x M3 screws
6 x PCB terminal pins
2 x Blue PTFE sleeves
The
assorted hardware
pack contains:
1 x Volume knob
1 x 50K LOG potentiometer (volume)
4 x EL34 Octal 8-way valve bases (for V1 and V2)
6 x Gold RCA Input sockets (3 Red 3 Black)
