Vermes
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The construction of presented here tube amplifier was based on amplifier FONICA W-480f. Tube ECC83 (not like in original amplifier – ECC81) operates in the input stage. There are also additional meters on EM84. There is no balance regulation. Speaker transformers used are the same as in the original device: TG6-16-666. Glow is stabilized, so you have to add few turns to winding of the glow and add germanium diodes in the rectifier. Transformer TS40/29/676 was also applied in this device. The delay system operates on a thyristor, which gives the anode voltage to the end tubes after approximately one minute after turning on the power supply.
Housing was made of stainless steel, sides of sanded and lacquered lath. Cover of the transformers was made of plywood and painted black.
Schematic of delay system:
Link to original thread - Wzmacniacz lampowy audio
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