AUDIO VALVES: ECC82 12AU7 CV491 CV4003 B329 M8136 7193 TWIN TRIODE

The ECC82 was designed as a general purpose medium mu  twin triode.   A special quality version was also produced, for the military bearing the notation CV4003. An anti-microphonic and matched section version designated the E182CC was also made. 

An amplification factor of 17 is quoted, which is much lower than that for the pin compatible ECC83 at 100.   The glass tube envelope is approximately 20 mm in diameter and, excluding the B9A button base pins, is approximately 50 mm in height.

The ECC82 found use in many hifi amplifiers and guitar amplifiers of the golden valve era and many exotica also have them lurking beneath their covers, this list details just some of them: -

Allen & Heath VF-1 compressor

 Ampeg SVP-PRO Bass Preamp

 Art PRO VLA II comp

 Audio Note CD2

 Audio Note L2 Custom - Response Audio

 Audio Note M1 preamp

 Audio Note M8

 Audio Valve Eclipse preamp

 Bottlehead

 CJ PV10

 Concert Fidelity CF-080LS Hybrid Line Stage Preamplifier

 Conrad Johnson PV 10AL

 David Berning ZOTL Pre One Audio Preamplifier

 Decware Zbox Unity Gain Stage

 Eastern Electric DAC

 Eastern Electric Minimax

 Head-Direct EF1 preamp

 Jadis JP-800 preamp

 JJ243 preamp

 Octave (Germany)

 Odyssey Kandela preamp

 Ray Samuels Raptor

Ray Samuels The Emmeline II, “B-52” fully balanced Headphone amplifier and full functioning preamplifier

 Rogue Audio Cronus

 Rogue audio Perseus + Rogue audio stereo 90,

 Roth Audio MC4 Music Cocoon

 Scott Tuner

 Sonny Jr. Four-ten / Customized Harp Amp

 Sun Audio 1000

 VAC PA100/100

 Velleman K4000 kit

 VTL 6.5 preamp

 VTL 7.5 Series II

 VTL TL 7.5 MKII preamp

 Wavac pr-t1 preamp

ecc82 12au7 cv4003 mullard