ECC83/ECC803S-JJ TESLA ECC83/ECC803S-JJ TESLA Click on image(s) above to view larger
Select Test Options
  • Factory Tested
  • Balanced (Triodes)

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

The JJ factory was born out of the ashes of the former Tesla factory. They currently make a range of High quality valves based on some of Tesla most famous designs.
The JJ ECC803S is a warm sounding large long anode plate designed ECC83. JJ has used long 17mm plate design used in the 1950s by Mullard with a longer fin to improve heat dissipation. The valve features gold plated grid, top getter and a spiral filament to reduce hum and noise.

The ECC803S is an excellent sounding valve which is ideally suited to audio applications. It produces a rich warm sound which is both thick and fat. The valve is musical and well balanced; it is easy to listen to with no harshness and it has plenty of detail in the upper mids with a fast smooth bass response.

Guitar Amplifiers
I would not use these in guitar combos or high gain stages this is because the long plate structure it is susceptible to the vibration and excessive microphonics. I would only use these in guitar heads with vintage voiced pre amp sections such as old Marshall Superlead heads.

For combos and High gain amps the JJ ECC83S is a better choice and will last longer. So we do not recommend the use of the ECC803S in these applications

Audio amplifiers.
This is a clear winner as the smooth openness of the sound is great at removing hardness from modern digital equipment. The valve provides excellent performance and a low cost upgrade to the Chinese 12AX7 that is supplied in modern Hi-Fi equipment.

We offer two options:
1) Factory tested from the JJ factory
2) Balanced -matched triode sections for Phase splitter, Audio & Tube microphones

All JJ Balanced 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

If you want a matched pair then by ordering 2 of the balanced valves you will get a matched pair



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