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Harma Valves / 6L6GC-HARMA RETRO MESA SELECT
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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.
Mesa Select for use in Mesa BoogiesHarma 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.
The 6L6GC Harma Retro Mesa select have been specially selected to run with Mesa Boogie non- adjustable fixed bias arrangement and will work in all Boogies that use 6L6GC.
These output valves have also been specially burst tested under real working conditions to ensure the utmost reliability
The Harma 6L6GC Retro is a re issue of the famous Sylvania STR 387 that was produced for Fender in the early 1970s.This was one of the most famous 6L6GC and sought after USA made 6L6GC for it balanced and clear sound.
The Harma 6L6GC Retro has many features that make it ideal for use in high gain amplifiers particularly in combos. The valve features thick mica spacers and internal bracing which reduces vibrations and microphonics. The mica spacers are also braced top and bottom to prevent rattle, and internal vibration. The valve uses gold grid wire and high temperature alloy for the anode plates. This provides excellent performance under the most demanding application.
The Harma 6L6GC Retro produces a balanced even response which is similar to the famous Sylvania design and prevents it from sounding muddy under full distortion. The treble is clear with an aggressive edge which will suit both the vintage and modern rock players.
In overdriven mode the Harma 6L6GC Retro produces a clearly defined top end with a tight deep bass. This all adds up to a valve that produces a creamy overdriven sound with plenty of upper end harmonics. The balance between the best of vintage and modern sounds has made this our best selling 6L6GC.The Harma Retro 6L6GC is for the player that wants a modern edged Hi gain sound with a balanced and detailed response without his tone getting lost when saturated.
The Harma 6L6GC Retro clean characteristics make this ideal for use in a wide range of amplifiers with it overdriven sound becoming many rock players number one choice.
All Harma Output valves are Dynamically Burst tested and undergo our own unique real world burst testing under real working conditions. The valve undergoes full drive testing which involves a series of varying timed electrical signal bursts that replicate the same stress conditions that the valve will encounter in your amplifier. Note No other supplier tests valves this way and why Harma valves have been used by the top Professionals. This is designed to ensure the ultimate reliability. The Harma valves have passed all the following tests:
Gain (m/A) Drive Tested)
Variable Signal Burst(Burst 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
All output 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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