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Old 23rd Nov 2021, 6:05 pm   #1
AndyAmp1970
Diode
 
Join Date: Nov 2021
Location: Kessingland, Sufffolk, UK.
Posts: 3
Default Wireless World April 1969 Amplifier Kit. 2N3055 Transistors.

Hi there, I have just built a kit version of this amp. When I first powered it with my bench supply, it was short circuiting (current limiting). I discovered that I did not have insulating washers on the underside of the 2n3055 mounting screws. After adding washers, it now plays music, but very weak sounding and each of the stereo channels is only drawing 30mA. Heatsink is stone cold.....Have I blown up the 2N3055's?

Details of the circuit attached.
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Last edited by Station X; 23rd Nov 2021 at 7:28 pm. Reason: Forum rule compliance.
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