JJ Tesla / ECC81/12AT7-JJ TESLA

ECC81/12AT7-JJ TESLA ECC81/12AT7-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.

A test report is available click here to view

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 ECC81 is an excellent modern valve that provides low noise and low microphonics. It has a clear open sound which makes it a good choice for Audio amplifiers, phase inverters and reverb driver circuits.

The JJ Tesla ECC81 is an economically priced valve that really outperforms the Chinese 12AT7 that seems to be used in many modern guitar amplifiers and far eastern made amplifiers.

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



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