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Pair Angela Instruments DIY 300B Tube Amp Aluminum Chassis

Angela Aluminum Chassis
Angela Aluminum ChassisAngela Aluminum ChassisAngela Aluminum ChassisAngela Instruments 300B Tube AmpAngela Instruments 300B Tube AmpAngela Instruments 300B Tube Amp
Price: $99.99
Item Number: AIAC
Manufacturer: Angela
Pair Angela Instruments DIY 300B Tube Amp Amplifier Aluminum Chassis 1991 Solid Raw Aluminum.
Back in the '90s we published some projects for building pretty simple 300B monoblocs  in the Angela Instruments Catalog and, later, on our website. This sale item consists of two aluminum chassis, two perforated bottom plates and four end blocks. The end blocks and bottom plates are bolted to captive threaded inserts with machine screws. Each chassis measures 16&3/8" long X9&7/8" wide X 3" tall.
Because of the thickness of the aluminum there is some slight stress cracks on the long bent edges but this is easily removed by filing and sanding prior to finishing. Some light sanding is also required on the top surface. I finished my amps with Sherwin Williams Polane T catalyzed black textured finish because it's tough as nails. Tube layout per monoblock is one GZ37 or similar rectifier, one 300B power output triode and one 6SN7GTB front end tube. Chassis is punched for a Hammond 1627SE but any good output iron will fit and work fine. The power transformer is the same footprint as the old Dynaco P782 found in the Mark III amps, same as the old Angela Universal Power Transformer we used to manufacture and sell. Chassis is punched for ASC brand oil filled capacitors, values 15uF, 30uF and 50uF. Standard size IEC AC inlet port, fuse assembly and on-off switch fit the punch outs on the back end of the amp. Holes for two speaker terminals, one input jack and a single hum balance pot are also standard sized. I'll include a schematic of the amp circuit with your purchase. Finished amp is depicted to show how this project goes together; it is not included in this sale.
Includes the two chassis, two bottom plates and four end blocks.

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