Alternatives & variations Download PDF datasheet

EL5

High-sensitivity receiving power pentode with approximately 18 W plate dissipation for substantial audio output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 1.35 A

Description

EL5 is listed in the supplied valve table as a high-sensitivity power pentode. Published operating and characteristic values were transcribed from its target row.

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: 6.3 V
Nominal heater current: 1.35 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

Plate resistance: 22000 Ω
Transconductance: 0.0035 S
Max plate voltage: 550 V
Max screen voltage: 550 V
Max plate dissipation: 18 W

Published target-row operating and characteristic values reviewed.

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

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
250 V
Published table operating point
Screen voltage
275 V
Published table operating point
Plate current
72 mA
Published table operating point
Control-grid bias
14 V
Published table operating point
Power output
8.8 W
Published table operating point

Characteristic

Plate resistance
22000 ohm
Published table characteristic
Transconductance
3500 µS
Published table characteristic
Heater/filament voltage
6.3 V
Published heater/filament rating
Heater/filament current
1.35 A
Published heater/filament rating

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

male Ausgangsleistung von
9 W
Heizspannung V
163 V
300 : /ga2‘
75 V
Ausgangsleistung . . . . . . . . . W
88 W
Gitterwechselsp. bei 109/, Verzerrung Vi
8.2 V
Empfindlichkeit . . . . . . . . . .. Vis0 mw)
0.5 V
Anodenspannung. . . . . . . . .. . Va
250 V
PushPull
Schirmgitterspannung. . . . . . . . . Vg2
275 V
PushPull
Anodenruhestrom . . . . . . . . .. I
2 X 58 mA
PushPull
zom Gitterstrom . . . . . . . . . . lamax
2 X 65 mA
PushPull
Schirmgitterruhestrom . . . . . . . . Ig3,
2 X 6.25 mA
PushPull
Schirmgitterstrom bei voller Aussteuerung Iz max
2 X 10.5 mA
Maximale Ausgangsleistung . . . . . . Womax
195 W
pysates 11¥a
250 V
2% Vgz [1]
275 V
2% Vgz [2]
175 Ohm
e T111Ck 2 [1]
50 uF
e T111Ck 2 [2]
72 mA
T LT 1] H
3500 Ohm
widerstand von
2500 Ohm
Kathodenwiderstand. folgt, daBl bei
2500 Ohm
monische bedeutend geringer als bei
3500 Ohm
ist, die Anwendung eines Belastungswiderstandes von
2500 Ohm
Wenn eine griflere Auns- H —;fﬁk
50 pF
PushPull;TwoTubes
spannung von
275 V
PushPull;TwoTubes
muf} dieser Widerstand durch einen ausreichenden Kondensator (25 bis
50 pF
1 Ve
<250 V
T Vee
<275 V
PushPull

Capacitance

tion der negativen Gitterspannung bei Va = [1]
250 V
tion der negativen Gitterspannung bei Va = [2]
275 V

Other

Anodenspannung . . . . . . . . . . . Va
250 V
OneTube
Schirmgitterspannung. . . . . . . . . V2
275 V
OneTube
Neg. Gittervorspannung . . . . . . . Fy1
14 V
OneTube
Anodenstrom . . . . . . . . . .. .l
72 mA
OneTube
Schirmgitterstrom . . . . . . . . . . Iy
7 mA
OneTube
Normale Steitheit . . . . . . . ... 8
8.5 mA/V
OneTube
Vao = max [1]
550 V
Vao = max [2]
90 mA
a = max [1]
250 V
a = max [2]
0.3 pA
a = max [3]
1.3 V
Wa = max
18 W
V2o = max
550 V
Va2 = max [1]
275 V
Va2 = max [2]
50 V
W2 = max,
3 W