Guitar Amplifier Re-Valve Kits

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Listed below are our guitar amplifier re-valve kits. Review the list for the set that you require and click on the link. You will be taken to a page where it will show comparison prices from various suppliers. Before choosing the kit look up your guitar amplifier to see what valves are being used. This should also be in the manufacturers booklet supplied with the amplifier.

Guitar Amplifier Valve Kit with 1 x 12AX7 Tube

Listed below are standard guitar amplifier re-valve kits which include a single 12AX7 pre-amplifier valve. The 12AX7 tube is very popular with guitar amplifier designers and there are many different suppliers and manufacturers.

Guitar Amplifier Valve Kit with 2 x 12AX7 Tube

Listed below are standard guitar amplifier re-valve kits which include two 12AX7 pre-amplifier valve. The 12AX7 tube is very popular with guitar amplifier designers and there are many different suppliers and manufacturers.

Guitar Amplifier Valve Kit with 3 x 12AX7 Tube

Listed below are standard guitar amplifier re-valve kits which include three 12AX7 pre-amplifier valve. The 12AX7 tube is very popular with guitar amplifier designers and there are many different suppliers and manufacturers.

Guitar Amplifier Valve Kit with 4 x 12AX7 Tube

Listed below are standard guitar amplifier re-valve kits which include four 12AX7 pre-amplifier valve. The 12AX7 tube is very popular with guitar amplifier designers and there are many different suppliers and manufacturers.

Guitar Amplifier Valve Kit with 5 x 12AX7 Tube

Listed below are standard guitar amplifier re-valve kits which include five 12AX7 pre-amplifier valve. The 12AX7 tube is very popular with guitar amplifier designers and there are many different suppliers and manufacturers.

Guitar Amplifier Valve Kit with 6 x 12AX7 Tube

Listed below are standard guitar amplifier re-valve kits which include six 12AX7 pre-amplifier valve. The 12AX7 tube is very popular with guitar amplifier designers and there are many different suppliers and manufacturers.

Kits with the Rectifier Valve Included

Full Replacement Valve Kits Explained

Replacing Guitar Amplifier Valves
Replacing Guitar Amplifier Valves

All valve guitar amplifiers include a mixture of rectifier, pre-amplifier and power output valves (or tubes in the USA). The typical life of a valve is 1000 hours. As the operate together the performance of all the valves will degrade as time goes by. Buying a full replacement valve kit for your guitar amplifier is a great way to restore the overall sound and performance of your amp. These are full kits including all of the valves (or tubes) that are required to restore the performance and reliability of your guitar amplifier. The valves are fully tested and specially chosen for their sound characteristic and saved into matched sets including all of pre-amplifier and power valves required. Some kits also include the rectifier valve however if the kit does not include the rectifier these can be purchased separately as they do not need to be matched.

Why Change all of the Valves?

Yuma Gold Blues-30 Valve Amplifier
Yuma Gold Blues-30 Valve Amplifier

Buying a full guitar amplifier re-valve kit will ensure that the overall performance and reliability of your amplifier will be restored to the original design standard. If you have owned your guitar amplifier from new they you will know if the valves have been changed however when buying a second-hand amplifier the age and usage of the valves may be unknown. In most Valve guitar amplifiers the pre-amplifier and power output valves are matched. This ensure the valves perform as designed. Fitting unmatched valves may cause the amplifier to become unreliable with a noisy sound.

Yuma Gold Blues-15 Valve Amplifier
Yuma Gold Blues-15 Valve Amplifier

It can be a false economy buying single valves and inserting them into the existing circuit. If unmatched valves are used in the amplifier it is highly likely that the output sound will be degraded but most likely using the amplifier like this will lead to expensive damage to other parts of the circuit. When the amplifier is idle, both valves will draw a small amount of current. If both valves are matched and drawing the same current, and have the same amount of gain, they will do a good job of cancelling any mains hum and other noise inside the amplifier circuit. If the are not balanced (or matched) more hum will be present in the speaker. Also, it is likely that there will be a mismatch in the current draw, resulting in one valve getting hotter than the other valves in the amplifier. This may be severe enough to cause the valve to glow red which will reduce the life of the valve and overall reliability.

Buying kits that have matched sets of valves will ensure the valves have been individually tested for the same bias current under identical conditions of plate voltage and grid bias voltage.

More Amplifier Valve Links

  • Single Valve Purchase
    • Buy a single guitar amplifier valve for replacing faulty tubes. Check your amplifier manufacturers instructions as some amplifiers need matched sets. Click on the links above.
  • Matched Sets of Amplifier Valve
    • Matched sets of pre-amplifier and power output valves to ensure the maximum performance from your amplifier.
  • Full Guitar Amplifier Re-Valve Kits
    • The best way to get the best from you guitar amplifier. By changing all of the valves as a complete set maximum performance from the amplifier can be assured. Changing individual valves can be a false economy as the one weak link in the chain will affect the overall performance.
  • Choose your Guitar Amplifier
    • We have kits available for most guitar amplifiers. Use the link above or the SEARCH feature to look up your amplifier
  • Read our Guide to Replacing Guitar Amplifier Valves.

Guitar Amplifier Tube Replacement

We have included some guidance on selecting the best new tubes for your guitar valve amplifier. Changing the valves periodically can have a massive effect on the quality of the sound generated by the guitar amplifier and also reduce hum. Read our guide to Amplifier Tube Maintenance and Care.

Once you have changed the valves in your amplifier make a note of the date. This can be by adding a sticker to the back of the amplifier. This will allow you to decide when is best to change them in the future. Amplifier valves (or tubes) will operate under normal conditions for up to 1000 hours. After this they will start to degrade.

Guitar Valve Amplifier Technology Explained

We have written a number of pages to explain the guitar valve amplifier technology and some of the work that is behind valve guitar amplifier design, components used in the manufacturing process and how to care and maintain your valve amplifier in top condition. Our articles explains guitar valve amplifier technology starts with some basic explanations of the different types of guitar amplifier.

Valve Amplifier Circuits.

Guitar Valve Amplifier Technology
Fender Deluxe Circuit Diagram

Within our guitar valve amplifier technical guides we have included some circuit diagrams of classic tube amplifier designs from the 50’s and 60’s. An example is shown of the Fender 5C3 circuit as used in the Fender Deluxe Valve Amplifier.