Fender Hod Rod Deluxe Repair
Fender Hod Rod Deluxe Repair

This is the world’s most popular valve amp [citation needed], meaning I get a Hot Rod Deluxe Repair quite regularly. The amp has two common faults, which are well documented. The first, and most common is the grey ‘IC’ (Illinois capacitor) electrolytic caps which are prone to failure. Fender use these presumably because they’re the ... Read more Fender Hod Rod Deluxe Repair

Blackstar Series One repair S1-104EL34
Blackstar Series One repair S1-104EL34

This Blackstar Series One repair from February was a bit of a mess! The amp had unfortunately received the unhelpful care of another repairer who had left the amp in a terrible state. If you don’t like to see damaged PCBs, look away now. It was brought to me because it was blowing fuses at ... Read more Blackstar Series One repair S1-104EL34

Marshall Silver Jubilee repair – Marshall model 2558
Marshall Silver Jubilee repair – Marshall model 2558

I was quite intruiged when a Nottingham guitarist brought this Marshall Silver Jubilee repair to my Newark workshop. These amps have taken on a bit of a legendary status, due in no small part to their association with Slash and Joe Bonamassa. I love how this amp looks, and it’s got an interesting tone control ... Read more Marshall Silver Jubilee repair – Marshall model 2558

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Guarantee (Tier 1 and Tier 2)

This page should be read alongside https://www.ampworks.co.uk/guarantee/

Amps repaired by Keld Ampworks usually come with either a Tier 1 or a Tier 2 guarantee. Both guarantees represent a guarantee of a quality repair, but Tier 1 goes a little further. Your guarantee level is indicated on the invoice and/or repair report. This is offered at Keld Ampworks’ discretion.

Guarantee Tier may also be informally indicated by a sticker on the amp.

Tier 2

Tier 2 is the standard guarantee level. All work undertaken is guaranteed for the full guarantee period. Any faults caused by Keld Ampworks work are repaired under guarantee.

Example 1: I repair Bob’s amp and replace a capacitor C34 in the power supply. The amp is given a tier 2 guarantee. The capacitor C34 fails after 2 months of use. The failure is covered under guarantee.

Example 2: I repair Sarah’s amp and replace a speaker. The amp is given a tier 2 guarantee. The amp’s transformer fails. The failure is not covered under guarantee.

Tier 1

Tier 1 is a special level of guarantee which means Keld Ampworks guarantees the correct operation of the repaired unit for the full guarantee period (usually 6 months). This means that a fault occurring within the guarantee period unrelated to the repair will be repaired under guarantee. Tier 1 guarantees are offered at Keld Ampworks’ discretion.

Example: I repair Claude’s amp and replace an input socket. The amp is given a tier 1 guarantee. The capacitor C34 fails after 2 months of use. The failure is covered under guarantee.

Which jobs are covered under Tier 1 and Tier 2?

  • Tier 1 guarantees are offered at Keld Ampworks’ discretion.
  • Tier 1 jobs are usually amp repair jobs that have involved an in depth examination of multiple parts of the amplifier – power supply, preamp and power amp.
  • Some amplifiers have common problems that I see regularly. I will recommend solutions and if the customer accepts my recommendations then the amplifier is more likely to end up with a Tier 1 guarantee.
  • Usually complicated channel switching amplifiers with multiple inputs and outputs will be given a Tier 2 guarantee. (Eg. JCM2000, Tubemeisters).
  • Tier 2 guarantees are usually given on amplifiers if the disassembly and reassembly represent a significant part of the repair (Eg. Mesa Boogie).
  • Tier 2 guarantees are usually given on jobs in which a customer has accepted some work, but declined other suggestions.
  • Tier 2 guarantees are usually given on amplifiers that have been worked on by another repairer, unless that repair has been re-done by Keld Ampworks.
  • Tier 2 repairs are offered on amps with no available schematic/service information
  • Tier 2 repairs are offered on amps with extensive PCB damage where a manufacturer replacement is not available. PCB retracking IS covered by the terms of Tier 2 guarantee as this counts as ‘work done’.