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Traditional Values with a high tech twist

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Fender Hot Rod Deluxe & Blues Junior Repair in Harlow

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 because they’re a very popular amplifier! Take the Blues Junior and Hot Rod Deluxe amps.  Not bad sounding, small, all valve and very loud for their size!

Previous Fender Issues

Having seen many many different weird faults with Fender Blues Juniors, Twins and Hot Rod Deluxes some of which we’ve outlined below, we have fully repaired and handed them back to their owners for many more years successful playing!


-Loud Humming with nothing connected

-Unusual self oscillation when turning tone controls and gain pots

-Issues with having to turn volume past 2 to hear anything

-Blowing valves, even new ones

-No noise at all

-Low distorted output

-No reverb or intermittent 

-Crackles and pops

-Input jack issues

Upgrades and Identified Issues

Blues Junior Fixed Bias Problem

By far the biggest issues we find with Blues Juniors is their fixed bias.  In most cases the UK voltage is much higher than that assumed and calculated by Fender, as such we have never had an amp in with an acceptable bias.

Is this an issue?

Every amp has measured with a very Hot bias setting.  This dramatically shortens the life of the valves.

The Solution

we fix an adjustable bias controls making it easier to set the right level, this should always be carried out by a professional as there are potentially lethal voltages present when carrying out bias setting on these amps

More info & arrange a Repair

We’ve written a blog covering this in greater detail, you can read about it here, and arrange a repair


Adjustable bias fitted to a Fender Blues Junior Amplifier
leaking IC Capacitors removed from a Fender Amplifier
Fender Hot Rod Deluxe Storage Capacitor Upgrade F&T

Hot Rod Deluxe Storage Capacitors

Excessive background humming, loss of volume, weird oscillation noises? chances are the storage capacitors are past their best

Is this an issue?

We’re unsure if there is a fault with a batch of IC branded capacitors of if it is because of the excess heat inside the amplifiers which causes them to leak and prematurely fail.

The Solution

Depending on the version HRD you have depends how many of these capacitors there are to change, however we only fit F&T branded capacitors.  These are a premium German brand and are widely regarded and used by the audio industry in top end amplifiers.  We’ve installed these for many years and so far have never had a failure.


More information & Repair

You can read more about our storage capacitor upgrades and make a repair booking by referring to this blog


Can I do repairs myself?

One thing we get asked often and then have to fix properly after, is can I do these repairs myself? 

Like all electronics with high voltages possible on the circuit board even up to an hour after being disconnected we discourage you trying.


Damage removing main board

Almost all work to Blues Juniors and Hot Rod Deluxes requires removal of the main board. This has all the pots and jack sockets on the top attached.  Many repairs brought to us have the original fault and added snapped pots and jack sockets where the user or “a friend who knows a bit about electrics” has had a go at dismantling and removing the board.


Damage to circuit board tracks

Another popular damage to occur to these kinds of amplifiers is damage made by forcing components off the board without correctly unsoldering the wire legs.  I don’t know why but we see more circuit board damage to these amps than any other.  I think it may be because of how hard it is to remove the main board people try to do it all in-situ, either that or the legs of a component are cut and new ones are tagged on with a blob of solder to the old legs.  We’ve seen some other companies who claim themselves as elite repairers and for whatever reason have done the same.  


What our Customers Say

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Start your Fender Amplifier Repair now

If you’re new to Fender amplifiers, we highly recommend the above mentioned amps as a great valve starter, they are clean simple and have options and loved by many!

Purchase one direct from Fender UK

Fender Hot Rod Deluxe Storage Capacitor Upgrade F&T
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Microphone power supply repair
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What our Customers Say

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Start your repair now by clicking the button and registering your guitar amp for a repair or service now!