What I am working on . .
After a good ten years use this valve pre amp started developing a little crackling and rustling noise on some of the inputs. The cause is oxidisation on the rotary selectors. As you can see from the dismantled switch in the picture the contacts on the left are dull with oxidisation whereas the ones on … Read more
So great to hear a 15″ speaker again. This is driven by a 30 watt class A four valve EL84 power section in WEM’s seemingly dated combo. But oh boy does it pack a punch. Rather than 30 watts you would be forgiven for thinking 100 to 150 watts. Such is the trickery that we … Read more
As is typical with boutique amps every conceivable part has an up market feel to it. Even the screws are stainless steel, you can’t even see some of them. It’s a nice touch of luxury. Sounds wise this Princeton clone, like the original is super loud for a small amp. Both suffer from cabinet ratttle … Read more
Fantastic active monitor speakers that sound great and make you feel right at home. A couple of issues and tips I have noticed on these are: watch out for overheating resistors in the power supply (R2, R3 and R17). They cause damage due to the heat travelling up the board, look at the pictures for … Read more
Solid state pre amp with EQ and very high voltage EL34 output stage this amp would make a great bass amp.
Carlsbro 50 Top A very simple amp probably quite a budget item in its day but with partridge transformers and simple design and build Carlsbro created a classic that will go on forever.
Thought I would share a couple of photos of Marshall JMP amps that I have worked on recently. First we have a 74 and then a resissue. They sound good as gold and the re-issue has a much better turret board design to boot.
This week I have been working on a 5013 parametric EQ. Featuring an ECC83 pre amp buffer stage for headroom and four band parametric I bet this is great toy for bass players as well as studio applications. I have come across several TL Audio items and they are well engineered and eminently repairable. Usually … Read more
Absolutely amazing original amp. 40 years old and orginal valves working perfectly.
Amp repairs seem to go in waves. The latest one being a string of TSL with what I call TSLitis. This increasingly common condition causes these amps to overheat and do serious damage the amp. The problem is that the amps circuit board material is not doing its job of insulating the connections properly and … Read more
A client found these two overseas on holiday and sent them in for repair. First one looks like a Mark III solid state Second one is a custom copicat
