Vacuum Tube Data Sheets

12AX7 / ECC83

Rp = 0.047 M (ohm)

Rg = 0.15 M(ohm)

Ebb (V) Rk (ohm) Ip (mA) Eo (Veff)6 Gain % Distortion7
200 1500 0.86 18 34 8.5
250 1200 1.18 23 37.5 7.0
300 1000 1.55 26 40 5.0
350 820 1.98 33 42.5 4.4
400 680 2.45 37 44 3.6

 

Rp = 0.1 M(ohm)

Rg = 0.33 M(ohm)

Ebb (V) Rk (ohm) Ip (mA)   Eo (Veff)6 Gain % Distortion7
200 1800 0.65 20 50 4.8
250 1500 0.86 26 54.5 3.9
300 1200 1.11 30 57 2.7
350 1000 1.40 36 61 2.2
400 820 1.72 38 63 1.7

 

Rp = 0.22 M(ohm)

Rg = 0.68 M(ohm)

Ebb (V) Rk (ohm) Ip (mA)   Eo (Veff)6 Gain % Distortion7
200 3300 0.36 24 56 4.6
250 2700 0.48 28 66.5 3.4
300 2200 0.63 36 72 2.6
350 1500 0.85 37 75.5 1.6
400 1200 1.02 38 76.5 1.1

   6 Eo at grid current starting point.

   7 The total harmonic distortion is approximately proportional to the output voltage.

Vacuum Tube Data Sheets

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