Products > Valves > Harma Valves

Watford Valves have been using valve equipment since 1976 and has been selecting and supplying valve to the professional market for over 20 years. The term 'new old stock' refers to tubes or valves which are new but are from factories which have long closed down. These factories such as Mullard, G.E.C, Telefunken, Siemens, Philips, General Electric and R.C.A produced some of the best valves ever made which is why these items have become very sought after in the music industry. Watford Valves keeps a huge inventory of new old stock tubes valves as well as current production items. Therefore Watford Valves can offer one stop shopping to satisfy the most demanding of needs of the professional market, the collector or the enthusiast. All output tubes valves are priced individually. All prices contained on this web site are exclusive of VAT.

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.

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  • NameManufacturerCommentStockPrice PhotoOrder
  • 12BH7A-HARMA RETROHarma ValvesThe Harma 12BH7A Retro design is based on the original U.S.A made General Electric 12BH7A. It has a number of features ...In stock£16.00Buy Now
  • 5881-HARMAHarma ValvesThe Harma 5881 is the original button based Russian military valve that powered the Marshall and Mesa Boogie amps (STR ...In stock£18.00Buy Now
  • 5881-HARMA MESA SELECTHarma ValvesMesa Select for use in Mesa Boogies

    This valve is specially selected to run in Mesa Boogies fixed bias ...
    In stock£20.00Buy Now
  • 5U4GB-HARMA RETROHarma ValvesThe Harma 5U4GB Retro is designed on the military grade Philips Sylvania 5U4GB that was used extensively in audio and ...In stock£16.00Buy Now
  • 6072A/ 12AY7-HARMA RETRO GOLD PINHarma ValvesThe Harma 6072A 12AY7 gold pin is a specially selected valve for use in high end audio, valve microphones and first ...In stock£20.00Buy Now
  • 6072A/ 12AY7-HARMA STRHarma ValvesThe Harma 12AY7-STR plate construction is based on the famous frame grid design that was pioneered in Germany by ...In stock£12.00Buy Now
  • 6550A-HARMA RETROHarma ValvesThe Harma 6550A Retro is a meticulous recreation of the classic General Electric 6550A as the Original American made ...In stock£30.00Buy Now
  • 6550A-HARMA RETRO-AMPEG SETHarma Valves10% Discount

    Harma 6550A Retro Special Ampeg SVT Set The Harma 6550A Retro is designed on the classic General ...
    In stock£180.00
    Buy Now
  • 6550A-HARMA RETRO-MARSHALL VBA 400 OCTETHarma Valves10% Discount

    This is a specially selected set of 8 output valves for the Marshall VBA 400 bass head.The Harma ...
    In stock£240.00
    Buy Now
  • 6L6GC-HARMA RETROHarma ValvesThe Harma 6L6GC Retro is a re issue of the famous Sylvania STR 387 that was produced for Fender in the early 1970s.This ...In stock£18.00Buy Now
  • 6L6GC-HARMA RETRO MESA SELECTHarma ValvesMesa Select for use in Mesa Boogies

    The 6L6GC Harma Retro Mesa select have been specially selected to run with ...
    In stock£20.00Buy Now
  • 6L6GC-HARMA STRHarma ValvesThe Harma 6L6GC STR has a number of features that make this an ideal upgrade in all audio and guitar amplifier ...In stock£18.00Buy Now
  • 6N1P-EB-HARMAHarma ValvesThe Harma 6N1P-EB is a special long life version of the 6N1P which is very popular with high end audio users over ...In stock£8.00Buy Now
  • ECC81-HARMA STRHarma ValvesThe HARMA ECC81-STR is a German manufactured valve that has been specially chosen for its outstanding performance and ...In stock£12.00Buy Now
  • ECC82-HARMA RETROHarma ValvesThe Harma ECC82 is designed on the ladder plate design that was used by Mullard and Philips.It also The valves have a ...In stock£16.50Buy Now
  • ECC83-HARMA RETROHarma ValvesThe Harma ECC83 Retro is a true sounding recreation of the famous Mullard ECC83.Unlike many tube suppliers, we are not ...In stock£16.00Buy Now
  • ECC83-HARMA RETRO-BALANCEDHarma ValvesSpecial balanced item with matched sections for use in phase inverter position, tube microphones or input positions ...In stock£18.00Buy Now
  • ECC83-HARMA STR Harma ValvesThe Harma ECC83-STR features an internally rugged construction with thick mica supports. This has a number of ...In stock£12.00Buy Now
  • ECC83-HARMA STR BALANCEDHarma ValvesSpecial balanced item with matched sections for use in phase inverter position, tube microphones or input positions ...In stock£16.00Buy Now
  • ECC83-HARMA STR DR250 High GainHarma ValvesA specially selected version of the Harma of the Harma ECC83-STR valve which has a slightly earlier break up than our ...In stock£16.00Buy Now
  • ECC83/ 7025 HARMA DR250Harma ValvesThe Harma 7025 STR DR250 is a close sounding recreation of the famous USA made 7025 valve.The valve supplies a tight ...In stock£12.00Buy Now
  • ECC83/ 7025 HARMA DR270-Hi GainHarma ValvesA specially selected super gain version of the Harma ECC83/7025 for the guitarist who wants the maximum gain whist ...In stock£15.00Buy Now
  • EL34/ E34L-HARMA STRHarma ValvesThe Harma STR E34L has found favour with many professional rock guitarists since it was road tested by Ben Matthews of ...In stock£16.00Buy Now
  • EL34/ E34L-HARMA STR MESA SELECTHarma ValvesMesa Select for use in Mesa Boogies

    This valve is specially selected to run in Mesa Boogies fixed bias ...
    In stock£18.00Buy Now
  • EL34/ HARMA-RETROHarma ValvesThe Harma EL34-Retro is based on the famous Mullard EL34 and has a number of important features over standard EL34 ...In stock£18.00Buy Now
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All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by all EU countries.


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