TUBE (work order): EL39
SOURCE FILE: sheets/154/c/CL33.pdf
>>> CONTENT MISMATCH: This PDF is the Mullard CL33, NOT the EL39. <<<
The CL33 is a 33V-heater output pentode (UK/Continental). EL39 is a separate type (6.3V indirectly-heated wideband/output pentode). The file content does not match the requested tube name. OCR transcribed faithfully below for the record; this datasheet is EXCLUDED from EL39 consensus.
MANUFACTURER: Mullard
YEAR: ISSUE 3 (CL33 1546)
PAGES: 6

===== PAGE 1 =====
MULLARD — CL33 — OUTPUT PENTODE. High-sensitivity output pentode for use in DC/AC mains-operated equipment.
HEATER (suitable for DC/AC operation):
  Vh: 33.0 V
  Ih: 0.2 A
OPERATING CONDITIONS:
  Va: 200 V
  Vg2: 200 V
  Vg1: -8.5 V
  Ia: 45 mA
  Ig2: 6 mA
  gm: 8 mA/V
  ra: 35,000 ohms
  ug1-g2: 13.5
  Ra: 4,500 ohms
  Vin rms: 5.0 V
  Vin rms (Wout=50 mW): 0.5 V
  Wout: 4.0 W
  Dtot: 10 %
  Rk: 167 ohms
LIMITING VALUES:
  Va(b) max: 400 V
  Va max: 250 V
  wa max: 9 W
  Ik max: 70 mA
  Vg2(b) max: 400 V
  Vg2 max: 250 V
  wg2 max: 2 W
  Vg1 max (Ig1=+0.3µA): -1.3 V
  Rg1 max (self bias): 1.0 MΩ
  Vh-k max: 175 V
  Rh-k max: 5,000 ohms

===== PAGE 2 =====
[Arrangement of electrodes and base connections — OCTAL BASE]: a (top), g2, g1, k.g3, h, h. Dimensions 45 mm max dia, 126 mm max height.

===== PAGE 3 =====
[courbes seules] CL33 transfer: Ia and Ig2 vs Vg1, Va=Vg2=200V.

===== PAGE 4 =====
[courbes seules] CL33 plate characteristics: Ia vs Va, Vg2=200V, grid bias family 0 to -14V.

===== PAGE 5 =====
[courbes seules] CL33 (triode connected): Ia vs Va, grid bias family, wa=9W line.

===== PAGE 6 =====
[courbes seules] CL33 push-pull and single-valve output curves (Ia/Ig2/Dtot/Vin vs Wout), Va=Vg2=200V.