50CA5

Beam-power pentode designed primarily for audio-frequency output stages of television and radio receivers operating at low plate and screen voltages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7CV
Socket code: B7G
Base pins: 7
Nominal heater: 50 V / 150 mA

Description

Beam power pentode for low plate/screen voltages. The supplied datasheet provides maximum ratings and representative Class A operating characteristics for receiver/audio output applications.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7CV
Socket code: B7G
Base pins: 7
Nominal heater voltage: 50 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7CV - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1G3	A	G3 — Suppressor GridGroup 7CV1 EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CV
PIN1K	A	K — CathodeGroup 7CV1 EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CV
PIN2G1	A	G1 — Control Grid EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CV
PIN3H	—	H — Heater EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CV
PIN4H	—	H — Heater EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CV
PIN5G1	A	G1 — Control Grid EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CV
PIN6G2	A	G2 — Screen Grid EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CV
PIN7P	A	P — Plate (Anode) EIA chart transcription; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 128, 7CV

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 15000 Ω
Transconductance: 0.0092 S
Max plate voltage: 130 V
Max screen voltage: 130 V
Max plate dissipation: 5 W
Max screen dissipation: 1.4 W

Beam pentode; second operating column used for promoted small-signal characteristics.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Heater voltage
50 V
Heater current
150 mA
Plate voltage
110 V
ClassA1
Maximum signal power output
1.5 W
ClassA1;125VPlate

Capacitance

Grid-to-plate capacitance
0.5 pF
Input capacitance
15 pF
Output capacitance
9 pF

Characteristic

Plate resistance
16000 ohm
110VPlate
Transconductance
8100 uS
110VPlate

Data set 02

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Typical plate voltage
125 V
ClassA
Typical screen voltage
125 V
ClassA
Zero-signal plate current
37 mA
ClassA
Load resistance
4500 ohm
ClassA
Maximum-signal power output
1.5 W
ClassA
Maximum plate voltage
130 V
PromotedValue
Maximum screen voltage
130 V
PromotedValue
Maximum plate dissipation
5 W
PromotedValue
Maximum screen dissipation
1.1 W
PromotedValue
Heater Current
150 mA
PublishedTable
Grid #2 Voltage 11O
125 V
PublishedTable
P Ean Af Grid #1 Voltage 4.O
4.5 V
PublishedTable
Maximum Signal Plate Current (Approx.) 31
36 mA
PublishedTable
Maximum Signal Gr Fd #2 Current (Approx.) ].5
11 mA
PublishedTable
Total Harmonic Distortion (Approx.J 5
6 %
PublishedTable
Maximum Signal Power Output 1.1
1.5 W
PublishedTable
Eq _=
50 V
PublishedTable

Characteristics

Plate resistance
15000 ohm
PromotedValue
Transconductance
0.0092 A/V
PromotedValue
Max 50 Volts
150 mA
PublishedTable