Power - Tetrode (NOT beam) ·Tetrode
Quick-heating directly heated double tetrode for mobile UHF transmitting equipment. Designed for rapid push-to-talk readiness, it serves RF output and frequency-multiplier stages and remains useful at frequencies approaching 500 MHz.
The Mullard YL1020 is a quick-heating directly heated double tetrode for UHF mobile-transmitter service.
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Representative of two identical RF tetrode sections.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Heater Voltage
16 V
Heater Current
4.25 A
Heater Warmup Time
0.5 s
Maximum
Maximum Intended Frequency
500 MHz
Transconductance
25000 uS
Each section
Data set 02
Published operating points and test conditions from this source.
Maximum Operating Frequency
460 MHz
Maximum Plate Voltage
300 V
Maximum Plate Dissipation
10 W
EachSection
RF Output Power
9 W
RepresentativePublishedMaximum
Operating Frequency
200 MHz
ClassC
Plate Voltage
300 V
ClassC
Screen Voltage
250 V
ClassC
Plate Current
45 mA
EachSection; ClassC
RF Output Power
9 W
ClassC; 200MHz
RF Output Power
7 W
ClassC; 460MHz
Filament Voltage
1.6 V
Filament Current
4.25 A