Dynacord Powermate 1000 MK2 Repair for Tony

Local vocalist Tony came in with his Dynacord PowerMate 1000 MK2. This turned out to be quite a tricky repair. Something had made four IC’s in the power amp go short circuit.

I put his message below so I can come back, look at it and stroke my ego when I am feeling low!

Tony Dynacord pm1000 mk2

Tony Dynacord pm1000 mk2

Putting a valuable and much loved piece of equipment into anyone else’s hands is always nerve wracking. The repair was handled really professionally I was happy with the price,  and customer service second to none.

Thanks again Dan
Tony Denison

Marshall 1960A Cab Jack Socket Fault – Fixed

I have had a Marshall 1960A Lead 4×12 cabinet in with problems.

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Only two out of the four drivers were working on mono 4Ω mode and one of the four was making bad noises. This cab relies on the switch contacts on the two jack sockets to connect the two pairs of drivers in series (16Ω) or parallel (4Ω) depending on which socket is used. The switch contacts on the original sockets are nickel silver or tin plated and can’t stand much current without burning out. This is what happened in this case. The arcing had heated the contact enough to melt the plastic body.

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To fix the fault I replaced both switch jacks with gold plated Neutrik / Rean NYS2152G replacements. They fit perfectly and should last a bit longer than the originals. I also sprayed the centre Mono / Stereo switch with contact cleaner. There was also a loose spade connector on one driver which I pinched up with pliers to solve the bad noises.

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Last night at the Moon

Tonight is the last night the Moon and Sixpence pub is open with Adam at the helm. A sad day for music lovers and hell raisers of Glossop. What will happen to the place now I am not certain. I have had a lot of great nights in there on the beer and wine and dancing most of which I cant remember that well. As both of us run moon themed businesses I feel a special affinity.

1970’s VOX AC30 Top Boost

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1970’s VOX AC30 in with a loud mains buzz. Main fault was the HT smoothing capacitor (the old one is the blue thing on the top). It also needed a new quad of EL84 tubes and a small repair to one of the speaker cones. All done, it was very hum free and hiss free. It is hard to fix the date for this one. It had 1976 on the POT’s date code. It looks like a Rose Morris era AC30 Top Boost amp without the voltage selector on the front panel and with PCB strips wired to valve sockets, not tag boards. The PCB’s are the superior glass fibre bluish ones. This is one of the better models to get. The 1970 to 1973 Birch-Stolec era models are to be avoided because the resin bonded paper PCB with directly mounted tube sockets degrades with the heat and the copper tracks come loose. Tag board wired models are easiest for techs like me to work on.

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