3x 12AX7 (ECC83) and 4x EL34 – Amplifier Re-Valve Kit-27

3x ECC83 and 4x EL34 Matched Guitar Amplifier Valve Kit 10

Review below the guitar amplifier valves which make up Guitar Amplifier Re-Valve Kit-27 – 3x 12AX7 (ECC83) and 4x EL34. On the website there are guitar amp tube sets for all the major valve guitar amp makers, use the search feature to look up your tube amp. Buying a full guitar amplifier re-valve kit, or tube set, will ensure that the overall circuit performance and reliability of your valve guitar amplifier will be restored to how it was originally intended to sound. Poor quality, and mismatched, tubes will result in hum and poor quality sound. If you have owned your tube guitar amplifier from new then you will already have a good idea how many hours you have used them. Amp valves deteriorate with time used and 1000 hours is the typical life of a valve. When buying a second-hand tube amp the age and usage of the guitar amp valves may be unknown. This is where buying a full tube kit works. Also, in most higher powered valve guitar amplifiers the power output valves are matched, this means they are tested to work together. Buying random valves that are not matched may cause the amplifier to become unreliable with distortion and noise. Review the current prices for this guitar amplifier valve kit, or tube set, below. Click on the link to place your order and get your tube guitar amp working at its best.

This guitar amplifier re-valve kit (replacement tube set) includes 3x 12AX7 (ECC83) and 4x EL34.

This guitar amplifier re-valve kit (replacement tube set) is suitable for these and many other guitar amplifiers:

Full Replacement Valve Kits Explained

Replacing Guitar Amplifier Valves - Valve Amplifier Re-Valve Kit
Replacing Guitar Amplifier Valves – Valve Amplifier Re-Valve Kit

This guitar amplifier re-valve kit (replacement tube set) includes 3x 12AX7 (ECC83) and 4x EL34 All valve guitar amplifiers include a mixture of rectifier valve, pre-amplifier valves and power output valves. Valves are known as tubes in the USA. The typical life of a guitar amplifier valve is around 1000 hours. As the valves operate at the same time the performance of all the valves will degrade together. Buying a full guitar amplifier replacement valve kit is a great way to restore the overall sound and performance of your guitar amplifier.

The re-valve kits listed below include all of the valves (or tubes) that are required to restore the performance and reliability of your guitar amplifier. The valves have been tested and specially chosen for their sound characteristic and saved into matched sets which include the pre-amplifier valves and the power output valves. 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.

More Amp Valve Sets

Why Buy Matched Valve Sets for your Amplifier?

Read our guide to valve guitar amplifier circuits and read our guitar amplifiers explained page to find out more. It can be a false economy buying single amplifier valves and inserting them into the existing circuit. If unmatched valves are used in a circuit which should have matched guitar amplifier valves it is likely that there will be a poor sound quality, noise and by using the amplifier will lead to expensive damage to other parts of the circuit. When the guitar amplifier is in standby and 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 of the guitar amplifier.

The guitar amplifier re-valve kit listed above includes 3x 12AX7 (ECC83) and 4x EL34 More guitar amplifier re-valve kits are listed below along with links to pages where you can look up a kit for your guitar amplifier.

Buy Guitar Amplifier Matched Valve Sets

Guitar Valve Amplifier Circuit Explained

Buying matched guitar amplifier valves will ensure that the guitar amplifier performs as designed. Matched valves have been individually tested for the same bias current under identical conditions of plate voltage and grid bias voltage. Most valve combo guitar amplifiers, especially push-pull designs, require matched output tubes. These can be in a matched Pair (x 2), Quad (x 4) or Sextet (x 6) depending on the guitar amplifier circuit design and the output of the amplifier. Read our guitar amplifier valves explained page to understand more about how the valves work in the circuit and the different types of valve that can be used. The general rule being more valves more power. In a push-pull guitar amplifier design one valve is pushing the speaker cone and one is pulling it. As the sound generated by the speaker cabinet is reliant on a clean signal it is important that the valves push and pull in equal measure. Read our guitar amplifier technical pages on the design of a Push Pull Valve Amplifier and also a Single Ended Valve Amplifier to understand how the technology works. We have also explained the role of the guitar amplifier pre-amplifier valves and the guitar amplifier power output valves. We have also done tests to see how different pre-amplifier valves compared and how they can shape the sound generated by the amplifier.

Also Consider Guitar Tube Links

Tips on Changing Amplifier Valves

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Amplifier valves (or tubes) will operate under normal conditions for up to 1000 hours, after this they will start to degrade. Read our Guitar Amplifier Technical Pages and our tips for Valve Guitar Amplifier Maintenance and Changing Guitar Amplifier Valves. Changing the valves is not as easy as it may seem and can be dangerous as the circuit involves high voltages and also the valves get hot. Read the guidance notes supplied by the valve amplifier manufacturer before starting this job, or, take the amplifier to a professional engineer.

Here is a handy tip to get the best from your valve guitar amplifier. Once you have changed the valves make a note of the date you had the work done. This can be by adding a sticker to the back of the amplifier. Going forward try to keep a basic log of often you use the amplifier each week. After a few weeks you can calculate an average weekly usage, then divide the estimated 1000 hours valve life by this figure and you can decide when is best to change them again in the future. For example 20 hours a week means that they need changing every year.