Harma Valves / ECC83/12AX7WA-HARMA VINTAGE BALANCED

ECC83/12AX7WA-HARMA VINTAGE BALANCED ECC83/12AX7WA-HARMA VINTAGE BALANCED Click on image(s) above to view larger
£20.00
£18.00

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All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by the UK only.

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


This is a specially matched version with balanced output from each triode section. These are for use in phono stages, Phase invertor or tube mics and can be bought in singles or as matched pairs.

The Harma 12AX7WA Vintage has been designed around the medium length ribbed anode plate design of the Mullard ECC83 in the UK and General Electric 12AX7WA in America.

Specially designed by the factory to combine the two most vital elements of these classic valves sound. The famous Mullard mid band and the outstanding top end clarity of the General Electric.

Sonically, the Harma 12AX7WA Vintage has plenty of definition with a clear open top end chime whether played in clean or overdriven mode.

The factory enhanced midband replicates the vintage Mullard producing as warm and thick mid sound with excellent note the definition.

The master stroke is that the Harma 12AX7WA retains the sparkle and chime that is found in the great vintage American General Electric 12AX7WA. It has the GE style large soundstage and gives the clean channel that chiming top end sparkle without being brittle or hard.

The combination of these features results in the valve not going thin and mushy especially if you use pedals to overdrive your amplifier. This is also very noticeable on high gain amplifiers and gives improvements if you use a reverb or phase pedals. The valves top end definition allows them to sound lush not mush.

The valves has the warm harmonic detail plus the combination of two of the most import elements of classic new old stock valve sound in one valve makes this a real winner whatever your musical style.

All Harma preamp valves are Dynamically Drive tested under real working condition have passed the following tests:
Gain (db) Drive Tested)
Transconductance (gm) Drive Tested
Output Drive Tested
Noise 1 (signal to noise)
Noise 2 (Aural)
Microphonics Test 1(Ambient)
Microphonic Test 2 (Shock)
Cathode Test
Grid Leakage Test

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