New Shadow pickups & preamp for the Epiphone Acoustic. #bridgnorthbusiness #shropshirebusiness #guitartech #guitarrepair #guitarsetup #guitarservice #epiphoneguitars #epiphoneacoustic View this post on Facebook
Yet another Macbook repair @shrop.rock.doctor. Son…
Yet another Macbook repair @shrop.rock.doctor. Sons Macbook Pro required a battery change. Would be a super simple job if the battery cells were not attached to the chassis with double sided tape. Used a length of PET 3mm braid as a cheese wire to release the cells from their bonds. Solvent on a cloth cleaned […]
Bringing the vintage tube amp Bulgin power cable i…
Bringing the vintage tube amp Bulgin power cable into the realms of safety. Now physically acceptable for a PAT certification. #bridgnorthbusiness #shropshirebusiness #guitartech #amprepair #audiorepair #bulgin #tubeamplifier #valveamp #vintageaudio #vintageamplifier View this post on Facebook
Resurrection of a rare tube amplifier today @shrop…
Resurrection of a rare tube amplifier today @shroprockdoctor. The Music City 100w Treble & Bass tube head was produced in limited numbers at the Laney amp factory circa 1970s. Designed around the -‘Laney Supergroup’ Tube head it is badged ‘Music City’ for the UK music shop Music City. Brought in non functioning, apparently last used […]
Blackstar HT Studio 20 finished. So after rebiasin…
Blackstar HT Studio 20 finished. So after rebiasing, ruling out all tubes as being related to the buzzing issue the root cause was eventually found to be a soldering issue on a power supply filter capacitor leg. It would have been possible to reflow without removing the pcb but because it wasn’t possible to see […]
So the Blackstar HT Studio 20 with intermittent bu…
So the Blackstar HT Studio 20 with intermittent buzzing, thermally induced after more probing turned out not to be tubes, I removed front end tubes & the problem persisted so I replaced the power tubes with a borrowed pair from another amp, still no good. From the beginning I suspected a capacitor issue but not […]
So pulled the chassis on the Blackstar HT Studio 2…
So pulled the chassis on the Blackstar HT Studio 20 for diagnostic relating to the intermittent buzzing as the amp warms up. Checking the output bias it was a little on the cold side so adjusted. The noise was only affected by the master volume control so suggesting the issue lies with the output section. […]
Blackstar HT Studio 20 on the bench today@shroproc…
Blackstar HT Studio 20 on the bench today@shroprockdoctor. Initially couldn’t find the reported issue, a buzzing noise that appears once the amp warms up. Played a guitar through it fot 20 minutes still nothing. Left it running with no jack in the input & went for lunch. Returned 40 minutes later to this. View this […]
Little Peavey Vypyr 15w combo modified & repaired….
Little Peavey Vypyr 15w combo modified & repaired. This little amplifier came in with an intermittent fault where the DSP would crash & lock up the amp requiring a power cycle to revive it. The fault lay with failed soldering on the DSP board with the root cause being chassis instability allowing flexing of the […]
A little 15w Peavey Vypyr modeling amp in for inte…
A little 15w Peavey Vypyr modeling amp in for intermittent power outage causing DSP crash with no recovery unless power cycled. Diagnosis started with the power supply / power amplifier board. Removed & reflowed rear suspecting a dry joint, slight flexing of the chassis caused the fault to occur. Doesn’t appear to be the power […]