![]() This amp has a pc board and what a mess! It was coated with a layer of gunk and what looked like penetrating oil, but it clearly wasn't on close inspection. ![]() Valve guitar amps will have a turret or eyelet board or a pc board or will be wired point to point. The rest of the components including the preamp valve sockets which are mounted on the pc board will go. ![]() The main parts in all valve amps are the transformers and these seem to go forever if they are well fused, and the amp has not been placed in a damp environment for long periods of time. Some people want to leave every possible component in the amp that still works even when the life left in those components may be short. When working on vintage valve amplifiers there is always the argument on how original you leave the amp after a repair. The date code on the speaker is Feb 1977. The codes on the CTS pots say 1978 if they are indeed the dates. The date of this amp’s manufacture is 1977 or 78. The Greenback is a classic speaker and was used in Marshall amplifiers in the 60s and 70s. With three ECC83 valves, one for each channel and one for the phase invertor this amp really kicks ass and has that great British valve tone.Ī Celestion 20-watt Greenback fitted in this amp. ![]() The amp has two separate channels, and both appear to be identical. The Wem Dominator 25 is an 18-watt valve amplifier using two EL84 valves for the output stage.
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