Harma Valves / EL34/HARMA-RETRO MESA SELECT

EL34/HARMA-RETRO MESA SELECT EL34/HARMA-RETRO MESA SELECT Click on image(s) above to view larger
£20.00

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A test report is available click here to view

Harma valves consist of a selected range of valves that are chosen after meeting stringent standards for sound quality and reliability. These valves are sourced from current production as well as some of the finest Nos valves available. Unlike our competitors no Harma valves, past or present has been made in China. Harma valves represent the finest available items of their type available.

Harma valves are tested using a range of custom designed and built test rigs which are unique to Watford valves.These unique tests are not offered by any other valve supplier in the world.

All Harma pre amp valves undergo the drive rating system; the valve undergoes a series of through tests under full operational conditions. This involves a controlled burn in process to ensure perfect stability and correct ageing. A shock and vibration test, microphoney, hum, and a balance and symmetry test.

All Harma output valves undergo our own unique real world burst testing. No other supplier tests valves this way. The burst testing process involves a series of varying timed electrical signal bursts. This runs the valves under the same stress conditions that they will meet in your amplifier especially when overdriven. All out put valves are then dual matched by us on anode current and gain. This will ensure that you get the best selected valves available anywhere in the world.
Mesa Select for use in Mesa Boogies


This valve is specially selected to run in Mesa Boogies fixed bias arrangement and will work in all Boogie that use EL34 or in the amplifiers with Simul-Class in the correct sockets.

The Harma EL34-Retro is based on the famous Mullard EL34 and has a number of important features over standard EL34 types. The grids of the tube use a block construction this enables the valve to provide smoother output and eliminating odd order harmonics.

The result is a tight bass response with a well-balanced sound stage and clean clear treble. Thicker glass not only adds strength but also provides lower microphoney.
High quality components make this a great sounding tube which will enable you to capture that famous Mullard sound. The valve is also designed to overdrive earlier which made it ideal for rock and metal players. These come in specially matched pairs and quads

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