ECC83-HARMA RETRO-BALANCED Click on image(s) above to view larger

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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.
Special balanced item with matched sections for use in phase inverter position, tube microphones or input positions where balanced operation is required.

The Harma ECC83 Retro is a true sounding recreation of the famous Mullard ECC83.
Unlike many tube suppliers, we are not interested in a lookalike copy we are only interested in the sound.
This valve produces the warm detail and harmonically rich midrange that made the Mullard sound so famous. The valve has been designed to give a smooth harmonic slope which gives a warm crunch in guitar amplifiers.

The Retro also has its sights set on the future and so this warm slope reduces the upper end fizz and hardness that occurs in modern day Hi gain pre amps.

To reduce the microphonics the valve has extra thick mica spacers with a rigid anode construction. To further reduce microphonics the valve is made from extra thick glass with a 22mm diameter.
In manufacture special attention is paid to the stamping of the anode plates to ensure close balance between the triodes.

This valve provides classic warm crunch harmonically rich 3 dimension midrange response that will bring the best out of any amplifier.



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