Author Archives: Frank

Electro Harmonix Big Muff Pi Repairs.

EH Big Muff effects pedal repair at JPF Amp’s London workshop in Denmark St.

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Ibanez TS-808 Tube Screamer Reissue Switch Repair.

The Ibanez TS-808 Tube Screamer is, rightly, regarded as a classic pedal, and has been reissued by Ibanez; this is lucky as an original TS-808s will set you back several hundred pounds.     Unfortunately the switches on the reissue (and indeed the originals), are not that robust. This pedal came in with a broken […]

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Regent Sounds Website up and running.

Regent Sounds, who are Central London’s longest running Fender & Gretsch specialist, and where we are now based, have (finally) got there website up and running so you can browse their stock and even make a purchase! As well as Fender and Gretsch, Regent Sounds also stock Musicman, and Danelectro guitars, Blackstar and VOX amps, and […]

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WEM / Watkins Copicat tape echo repair extravaganza

We had a bit of a WEM / Watkins Copicat repair extravaganza at JPF amps. Here’s a nice photo of three of the 8 (yes eight!!!) we had in for repair.   Great sound that can only really be done by a genuine tape echo.

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Leslie 122 Relay Repair

Here’s an emergency repair I did for a Leslie 122 cabinet. The fast / slow relay had died, and I needed to find a solution with parts from Maplins! The fast / slow replay relay switching is quite interesting in the 122. The cabinet is connected to the organ by a 6 pin connector, however […]

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Fender Tonemaster (Tone-Master) Guitar Amp Repair

Although much credence is given to the notion that hand-wired amps are inherently superior to other methods of construction, this is certainly not always the case. Here’s the inside of a Fender Tonemaster amp, which as you can see is a total rat’s nest of wires. I dread to think what Harry Joyce would have thought […]

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Gallien Krueger 2001rb Bass Amp Repair

Gallien Krueger make amps that are both well engineered and good sounding. I recently had a GK 2001rb bass amp in for repair. This is a complex machine (for a bass amp: see photo of innards); it has two 500W class G amps to provide do the heavy lifting in the low end (one each […]

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MESA Carbine M9 Bass Amp Repair

Here’s some photos from an emergency repair I did for the band Swans. I got phone call from their tech saying that one of their amps. a MESA Carbine M9, had died with smoke emanating from the innards. Swans needed the amp turned around quickly as they were on tour. I said that this didn’t look […]

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Hughes & Kettner TubeMeister 18 Repair

I’ve had a few Hughes & Kettner TubeMeister 18 amps in for repair. This is an 18W fixed bias amp that uses 2 x EL84s in the output stage. These amps have a quite sophisticated biasing system that automatically adjusts the output valve grid voltage for optimum bias, and also shuts the amp down in the […]

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Hammond Organ and Leslie Cabinet repairs

I’m a massive fan of the Hammond organ: well who isn’t? Anyhow I’ve recently been helping a friend of mine, and Hammond organist extraordinaire, Joe Glossop, get his Hammonds and Leslie cabinets into working order. Joe recently acquired a couple of 60’s M series organs and a Leslie 145 cabinet (to go with his C3 […]

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