TUBE: AD1 (output triode, directly heated)
SOURCE FILE: sheets/030/a/AD1.pdf
MANUFACTURER: Philips / "Miniwatt"
YEAR: 1947-1959 (page 1 dated 1/12/47; page 2 12.12.1953; page 3 12.12.1959; FP cover 1999.02.25)
PAGES: 4

===== PAGE 1 =====
"Miniwatt" — AD 1
OUTPUT TRIODE / TRIODE DE SORTIE / TRIODE-ENDROEHRE
Heating: Direct; A.C.; parallel supply.  Vf = 4.0 V   If = 0.95 A

Operating characteristics for use as single valve output amplifier (Class A):
 Va = 250 V        Ri = 670 ohm
 Vg = -45 V        Ra = 2300 ohm
 Ia = 60 mA        Wo = 4.2 W
 S  = 6 mA/V       Vi = 30 Veff
 mu = 4            dtot = 5 %

Operating conditions for two tubes in push-pull with self-bias:
 Va = 250 V        Raa' = 4000 ohm
 Rk = 375 ohm      Wo = 9.5 W
 Iao = 2 x 60 mA   Vi = 30 Veff
 Iamax = 2 x 64 mA dtot = 1.5 %

Limiting values / Grenzwerte:
 Vao = max. 550 V
 Va  = max. 250 V
 Wa  = max. 15 W
 Vg (Ig = +0.3 uA) = max. -2 V
 Ik  = max. 90 mA
 Rgf (1, self bias) = 0.7 Mohm
 Rgf (2, fixed bias) = 0.3 Mohm
 Cag < 23 pF
Notes: 1) with self (auto) bias. 2) with fixed grid-bias.

Dimensions: max 58 (dia), max 135 (height) mm.
Electrode diagram shows single grid g between filament (f f) and anode a -> TRUE TRIODE.
Base/socket: P (European 4-pin side-contact type, from pin drawing showing a, g, f, f).

===== PAGE 2 =====
PHILIPS — AD 1
OUTPUT TRIODE / TRIODE DE SORTIE / ENDTRIODE
Heating: direct; parallel supply.  Vf = 4.0 V   If = 0.95 A
Dimensions in mm: max 58 (dia), max 135 (height).
Base, culot, Sockel: P
Electrode diagram: single grid g between f-f and anode a (directly-heated triode).

Operating characteristics class A:
 Va = 250 V        Ri = 670 ohm
 Vg = -45 V        Ra~ = 2.3 kohm
 Ia = 60 mA        Wo = 4.2 W
 S  = 6 mA/V       Vi = 30 Veff
 mu = 4            dtot = 5 %

Limiting values / Grenzdaten:
 Vao = max. 550 V
 Va  = max. 250 V
 Wa  = max. 15 W
 Vg (Ig = +0.3 uA) = max. -2 V
 Ik  = max. 90 mA
 Rg (1, self bias) = max. 0.7 Mohm
 Rg (2, fixed bias) = max. 0.3 Mohm

===== PAGE 3 =====
PHILIPS — AD 1 (reissue, dated 12.12.1959; identical content to page 2)
OUTPUT TRIODE / TRIODE DE SORTIE / ENDTRIODE
Heating: direct; parallel supply.  Vf = 4.0 V   If = 0.95 A
Base, culot, Sockel: P
Operating characteristics class A:
 Va = 250 V; Vg = -45 V; Ia = 60 mA; S = 6 mA/V; mu = 4; Ri = 670 ohm;
 Ra~ = 2.3 kohm; Wo = 4.2 W; Vi = 30 Veff; dtot = 5 %
Limiting values:
 Vao = max. 550 V; Va = max. 250 V; Wa = max. 15 W; Vg(Ig=+0.3uA) = max. -2 V;
 Ik = max. 90 mA; Rg(self) = 0.7 Mohm; Rg(fixed) = 0.3 Mohm

===== PAGE 4 =====
PHILIPS Electronic Tube Handbook cover + index (page/sheet/date table). [no tube data]