Vermes
Advanced Member level 4
It is a lamp amplifier on 4 EL34, 2 ECC85 and EM84. The device was based on Telos 75, which was processed:
- the rectifier was changed
- anode voltage decreased
- the feedback removed
- housing slightly modified
- sockets and amplifier lighting changed
The amplifier sounds quite loud and dynamic, there is no noise in bass speakers. It is difficult to use two power supplies of the transformer in parallel, because one of them can burn the safety fuse from side of 230. You can resign from one of the power supplies. Add an electrolyte 400V 150uF to the bridge. You can also remove microphone inputs.
Pictures of construction:
First start:
Making housing:
Ready device:
And schematic after modifications:
Link to original thread - Wzmacniacz lampowy na podstawie Telosa