Category Archives: JPF Amps

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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Better Call Saul theme by Little Barrie using JPF Regent 25 amp.

New American TV drama Better Call Saul, which premiered on 8th Feb, is a prequel to Breaking Bad. The theme tune for this exciting new series was composed and performed by Little Barrie and features a JPF Regent 25 amp that was used both for the guitar and bass guitar. Click here for a sound […]

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Ashdown MAG300 Bass Amp Repair

I’ve had quite a few Ashdown bass amps in the workshop for repair. Here’s the inside of a MAG300 I had in a recently. The amp was not powering up, and on inspection the mains fuse has blown. On energizing the unit employing a current limiter (a 60W light bulb in series with the amp), […]

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Ampeg SVT Repair.

Here’s a rare example of a 70s Ampeg SVT that I had in the workshop recently. The SVT has, rightly, gained the reputation of being one of the greatest bass amp ever made. Even today the SVT is the industry standard bass amp for live work. Working on these amps is not for the faint-hearted, […]

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Orange Crush 15R & 30R Guitar Amp Repair

Here’s some photos from a pair of Orange Crush guitar amps I’ve had in for repair: a 15R and a 30R. Both had a very loud hum when the amp was at idle. In a solid state amp this is almost always due to poor power supply filtering. and further inspection showed that this was caused […]

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Peavey ValveKing 100 Guitar Amp Repair

Peavey have earned a reputation for making well-engineered amps at reasonable prices, so I was not expecting any major issues when I took in a ValveKing 100 for repair. The symptoms where that the amp was not powering up: neither the indicator light, nor the valve heaters where illuminated. This fault is usually due to […]

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Some JPF Headshells in Different Colours

There are now a ton of different colours you can get Tolex in, so we thought we would experiment with some different combinations. Here we have silver/ black and purple/ ivory.  

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“Shadow” the new Little Barrie album is now out.

Check out the new Little Barrie album “Shadow”. Barrie used a JPF Regent combo and a Fender Blonde Tolex Bassman for all the guitars on the album. You can see (and hear!!) Barrie demoing the combo on our Youtube channel.      

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Fender AB763-style Valve Guitar Pre-amp Custom Build

We were asked to make a valve pre-amp for a customer who wanted a simple clean Fender-style pre-amp, mainly for playing jazz. Here are some of the parts before the build.     The PCB is a charge pump circuit from Tube Town that boosts the incoming voltage (12VDC in this case) to a user-adjustable […]

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3 Cool Lovetone Pedals in for Repair

Here are 3 Lovetone pedals that we have recently repaired. These are rare and valuable pedals.     The Dopplerganger is a phase/ vibrato pedal with 2 low frequency oscillators and is a particular favourite of mine. The Meatball is an envelope filter, and the Ring Stinger is a ring modulator (which I would have […]

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