TUBE: AD1 (Triode, Endroehre — power output triode, directly heated)
SOURCE FILE: sheets/204/a/AD1.pdf
MANUFACTURER: Philips "Miniwatt" (trilingual DE/FR/EN data sheet)
YEAR: 1940 (pages dated 20.6.1940; graphs 30/4'36, 20-4-36; sheet ids 1311/3, 1312/2, 1313)
PAGES: 4

===== PAGE 1 =====
PHILIPS "MINIWATT" — AD1
Roehrentype: Triode, Endroehre. / Type de tube: triode, amplificateur de sortie. / Type of tube: triode, power output tube.
Heating: dir., A.C., parallel filament supply.
 Vf = 4.0 V
 If = 0.95 A
Grid-anode capacity: Cag = max. 23 pF (printed "ppF"/uuF = pF)
Operating conditions as single tube output amplifier:
 Va = 250 V
 Vg = -45 V
 Ia = 60 mA
 mu = 4
 S = 6 mA/V
 Ri = 670 ohm
 Ra = 2300 ohm
 Wo (dtot=5%) = 4.2 W
 Vieff (dtot=5%) = 30 V
 Vieff (Wo=50 mW) = 3.3 V
Operating conditions as push-pull output amplifier (two tubes):
 col1 (fixed bias) / col2 (auto bias):
 Va  = 250 / 250 V
 Vg  = -48 V (fixed) / -- (auto)
 Rk  = -- / 375 ohm (1: common cathode resistor)
 Ra  = 4000 / 4000 ohm (2: between anodes)
 Vieff = 30 / 30 V (3: per grid)
 Ia  = 2x50 ->2x66  /  2x60 ->2x64 mA  (rest -> full modulation)
 Wo  = 0 ->10  /  0 ->9.5 W
 dtot = 0 ->1.5  /  0 ->1.5 %

===== PAGE 2 =====
Grenzwerte / Limites / Limit ratings for operation:
 Vao = max. 550 V
 Va  = max. 250 V
 Wa  = max. 15 W
 Ik  = max. 90 mA
 Vg (Ig = +0.3 uA) = max. -2 V
 Rgk (3, self-bias)  = max. 0.7 Mohm
 Rgk (4, fixed bias) = max. 0.3 Mohm
Electrode arrangement / base connections / max dimensions in mm:
 [Electrode diagram: single grid g between filaments f-f and anode a -> TRIODE]
 Socket pin drawing: contacts a (anode), g (grid), f f (filaments); socket dia 35.
 Dimensions: max 53 (dia), max 135 (height) mm.

===== PAGE 3 =====
[courbes seules — pas de donnees tabulaires]
PHILIPS MINIWATT AD1 TRIODE: D% and Ia vs Wo(W); push-pull test circuit inset (Va=250V, Rk=375 ohm, Ra=4000 ohm).

===== PAGE 4 =====
[courbes seules — pas de donnees tabulaires]
PHILIPS MINIWATT AD1 TRIODE: D% and Vg(V)eff vs Wo(W); single-tube class A test circuit inset (Va=250V, Ia=60mA, Ra=2300 ohm).