Alternatives & variations Download PDF datasheet

F708

Pentode intended for output, amplifier, or modulator service. Philips documentation supplies electrical ratings and operating limits supporting power-capable signal and modulation applications.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7.5 V / 1.1 A

Description

Pentode for output, amplifier, or modulator service. Electrical ratings, heater data, operating limits, and published characteristics are captured from the supplied datasheet.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 7.5 V
Nominal heater current: 1.1 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0018 S
Max plate voltage: 450 V
Max plate dissipation: 12 W

Published ratings/characteristics are also preserved as parameter rows.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Published electrical value
8 a
F 7 O 8 actuellement.
12 W ne doit pas étre dépassée, il faut
12 W
12 W ne doit pas étre dépassée, il faut
rieur
26 mA
rieur 2 26 mA pour une tension ano-
dique de
450 V
dique de 450 V, le filament étant chauffé
par tension plaque dans un petit F
708 s
par tension plaque dans un petit F 708 suffisent pour la modulation d’un
1561 sont recommandés pour fournir la
1561 s
1561 sont recommandés pour fournir la
Tension de chauffage........ Vi =75V
75 V
Tension de chauffage........ Vi =75V
00 : Courant de chauffage ...... I =
1.1 A
00 : Courant de chauffage ...... I = 1,1 A env.
Courant de saturation
800 mA
Courant de saturation . ..... 1 = 800 mA env.
70 /,' Tension anodique .......... Vi —
450 V
70 /,' Tension anodique .......... Vi — 400—450 V
Vo Dissipation anod. admissible.. W, =
12 W
Vo Dissipation anod. admissible.. W, = 12 W
Iy F
400 V
Iy F 0l 4____ / Sy LT 400V, I, =20 mA ...... Soorm = 1,8 mA/V env.
Iy F
20 mA
Iy F 0l 4____ / Sy LT 400V, I, =20 mA ...... Soorm = 1,8 mA/V env.
Iy F
1.8 mA
Iy F 0l 4____ / Sy LT 400V, I, =20 mA ...... Soorm = 1,8 mA/V env.
ol / ] g o Inclinaison maximum ...... Swmae =
3 mA
ol / ] g o Inclinaison maximum ...... Swmae = 3 mAJV env.
70 SS S ‘
70 S
70 SS S ‘
| V,=400V,[,=20mA R; =
400 V
| V,=400V,[,=20mA R; = 4500 (2 env.
| V,=400V,[,=20mA R; =
20 mA
| V,=400V,[,=20mA R; = 4500 (2 env.