CCH1

Triode-hexode frequency changer for superheterodyne receivers. A separate oscillator triode drives the hexode mixer, combining both conversion functions in an all-current series-heater valve.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: P8A
Base pins: 8
Nominal heater: 20 V / 200 mA

Description

A combined oscillator triode and mixer hexode with a 20 V, 200 mA heater, intended for frequency-conversion service.

Socket description

European 8-pin side-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: P8A
Base pins: 8
Nominal heater voltage: 20 V
Nominal heater current: 200 mA
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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0023 S
Amplification factor: 11
Max plate voltage: 250 V
Max plate dissipation: 1.5 W

Published ratings and characteristics promoted from the approved source.

Section 2

Hexode

X-ray radiationInterelectrode capacitances

Plate resistance: 900000 Ω
Transconductance: 0.00075 S
Max plate voltage: 300 V
Max screen voltage: 125 V
Max plate dissipation: 1.5 W
Max screen dissipation: 0.5 W
Max cathode current: 15 mA

Published ratings and characteristics promoted from the approved source.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Supply voltage
200 V
Anode resistance
30 kΩ
Anode current
2.5 mA
Cold anode voltage maximum
550 V
Grid leak resistance maximum
20 kΩ

Capacitance

Anode-cathode capacitance
2.6 pF

SECTION 2

Hexode

Other

Anode voltage
200 V
Screen-grid voltage
50 V
Cathode resistance
250 Ω
Anode current
2 mA
Screen-grid current
3.2 mA
Cold anode voltage maximum
550 V
Cold screen-grid voltage maximum
300 V
Grid leak resistance maximum
3 MΩ

Characteristic

Conversion transconductance
750 µA/V

Capacitance

Input capacitance
7.8 pF
Output capacitance
12.3 pF