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Fender Hot Rod Deluxe / Blues Junior / Twin amplifier repairs

Fender Hot Rod Deluxe Storage Capacitor Upgrade F&T

Fender Amplifier Repair We see many Fender amplifiers in for repair.  Why so many do you ask? Are they more problematic than other brands? Do they have inherent “common faults” (as reported by forums)(you can read about our view on forums here…).   No, we generally Fix more Fender amps […]

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What is a microphonic valve, is it bad and how to identify.

What is a Microphonic Valve This is a really clear example of two output valves exhibiting microphonic properties. The left is worse than right.  A simple tap on the side with a pencil or finger will expose any vibrations which are likely to cause a nuisance.  The technical details […]

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My valves glow orange, that means they’re ok right?

valve glass envelope damage from over bias

Orange Glow From Valve But No Sound? The Valve Is OK – Right? Unfortunately the orange glow is just the heater element. It’s often impossible to tell if a valve is working by simply looking at it.  There are some exceptions however and I will explain below. The humble electron […]

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Crackly knobs, volume jumping erratically fix and cause

Cause of crackling pot

Crackle, intermittent sound when turning knob / Pot If you turn the dial on your guitar amp and it crackles, sounds like old TV static or you lose sound or it jumps full volumen the chances are your pots may be worn or dirty.   Inside of a guitar pot […]

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Common Repairs

 There are repairs we do all the time for amplifiers, these include sorting out crackles from dry joints on PCBs, excessive humming, broken jack inputs, output valve rebiasing and replacing broken valves, crackling or not working pots and controls.  More complicated repairs are when there has been a fire in […]

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