Data set 01
1961 Ferranti Technical Handbook
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
Cascode RF amplifier
Other
Maximum useful frequency
220 MHz
Voltage - Dual Triode (similar high frequency) ·Triode-Triode
UCC84
Series-heater double triode designed for cascode RF amplification in television receivers to approximately 220 MHz, providing paired high-frequency front-end sections.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- B9A
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 21 V / 100 mA
Description
Series-heater double triode for cascode RF amplification in television equipment to about 220 MHz.
Socket description
Small-button Noval 9-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- B9A
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 21 V
- Nominal heater current
- 100 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- Yes
B9A - 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
- 0.006 S
- Amplification factor
- 24
- Max plate voltage
- 180 V
- Max plate dissipation
- 2 W
- Max cathode current
- 18 mA
Ferranti/Mullard UCC84 high-frequency double triode for series-heater television cascode RF amplification to about 220 MHz. Each section is specified for max anode 180 V, plate dissipation 2 W, cathode current 18 mA; typical gain factor 24 and gm 6 mA/V at 90 V plate, -1.5 V grid and 12 mA anode. The separate triode on pins 6,7,8,9 is the intended grounded-cathode lower cascode stage; the other triode on pins 1,2,3 is the grounded-grid stage. Nominal heater 21 V, 100 mA in series operation. Quoted 2 kΩ is RF input impedance at 200 MHz rather than general DC plate resistance.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.006 S
- Amplification factor
- 24
- Max plate voltage
- 180 V
- Max plate dissipation
- 2 W
- Max cathode current
- 18 mA
Ferranti/Mullard UCC84 second physical triode for series-heater TV cascode RF amplifier through about 220 MHz. The section on pins 1,2,3 is intended for grounded-grid connection, while pins 6,7,8,9 form the grounded-cathode triode. Each has maximum anode 180 V, dissipation 2 W and cathode current 18 mA, and typical gm 6 mA/V and amplification factor 24 at Va 90 V, grid -1.5 V, Ia 12 mA. The documented 2 kΩ at 200 MHz is RF input impedance, not general DC plate resistance.
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
1963 Mullard
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Maximum operating frequency
220 MHz
ApplicationLimit
Heater current
100 mA
SeriesOperation
Heater voltage
21 V
SeriesOperation