Data set 01
1953 RFT Rundfunk Technik
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
Oscillator text
SECTION 2
Hexode
Application
Application
MixerFrequencyConverter text
Voltage - Triode (with diode, heptode or hexode) ·Hexode-Triode
UCH11
Series-heater triode-hexode frequency changer for superheterodyne receivers. The triode serves as local oscillator while the high-resistance hexode performs mixing with good circuit isolation.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- P8A
- Base pins
- 8
- Nominal heater
- 20 V / 100 mA
Description
The UCH11 combines an oscillator triode and a variable-gain hexode mixer for superheterodyne receiver conversion stages. The datasheet provides multiple screen-supply arrangements and wide regulation ranges for the mixer section.
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
- 100 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
- 0.003 S
- Amplification factor
- 18
- Max plate voltage
- 150 V
- Max plate dissipation
- 1 W
Triode oscillator section.
Section 2
Hexode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 1000000 Ω
- Transconductance
- 0.00068 S
- Max plate voltage
- 250 V
- Max screen voltage
- 250 V
- Max plate dissipation
- 1.5 W
- Max screen dissipation
- 0.5 W
- Max cathode current
- 15 mA
Hexode mixer section.
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 02
1957 Philips Receiving and Amplifying Tubes
Published operating points and test conditions from this source.
SECTION 2
Hexode
Characteristic
Plate Current
2.5 mA
ConverterSection
Conversion Conductance
750 µS
ConverterSection
Plate Resistance
1 Mohm
ConverterSection
Data set 03
1959 Telefunken
Published operating points and test conditions from this source.
SECTION 1
Triode
Capacitance
Triode input capacitance
4.7 pF
Section1
Triode output capacitance
2.7 pF
Section1
Triode grid-plate capacitance
<1.5 pF
Section1
SECTION 2
Hexode
Other
Plate voltage
200 V
Section2;ScreenVoltage=80V
Screen voltage
80 V
Section2
Oscillator-grid bias
-8 V
Section2
Characteristics
Conversion transconductance
680 uS
Section2
Capacitance
Hexode input capacitance
6.2 pF
Section2
Hexode output capacitance
9.1 pF
Section2
Control-grid-to-plate capacitance
<0.002 pF
Section2