Besides the wood stain 
One control - volume. On/Off is on left, hidden by a 6CL6. LED just visible.
Front and trim is poplar. Sides are pine:
Power supply ventillation and use of standard computer power cord.
Rear cover is 1/8" pressboard:
Tube layout, rear row, 6CL6, 6X4, 6CL6. In front are the two 13EM7's.
Top is Baltic birch ply:
Bottom is 1/4" pressboard. Judicious use of rivets holds iron down:
Metal is 1/16" 5052 aluminum (thick yes, but I got lots, CHEAP!!), primed and painted with hammertone finish. I made the big gouge in the paint job, in front of the 6X4 with my rivet gun
Schematic is the one at: http://geek.scorpiorising.ca/contrib/Geek/Concerto_Headphone.png
One control - volume. On/Off is on left, hidden by a 6CL6. LED just visible.
Front and trim is poplar. Sides are pine:
An externally hosted image should be here but it was not working when we last tested it.
Power supply ventillation and use of standard computer power cord.
Rear cover is 1/8" pressboard:
An externally hosted image should be here but it was not working when we last tested it.
Tube layout, rear row, 6CL6, 6X4, 6CL6. In front are the two 13EM7's.
Top is Baltic birch ply:
An externally hosted image should be here but it was not working when we last tested it.
Bottom is 1/4" pressboard. Judicious use of rivets holds iron down:
An externally hosted image should be here but it was not working when we last tested it.
Metal is 1/16" 5052 aluminum (thick yes, but I got lots, CHEAP!!), primed and painted with hammertone finish. I made the big gouge in the paint job, in front of the 6X4 with my rivet gun
Schematic is the one at: http://geek.scorpiorising.ca/contrib/Geek/Concerto_Headphone.png
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