Data set 01
1971 Machlette Laboratories
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Transconductance
25000 uS
Amplification factor
100
Grid-plate capacitance
4.5 pF
Maximum frequency
2500 MHz
Power - Triode (over 1000V 100W) ·Triode
518
Ruggedized high-mu ceramic-metal planar triode for transmitting service to approximately 2.5 GHz.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 6 V / 1 A
Description
The Machlett ML-518 is a rugged high-mu planar triode for oscillator, frequency-multiplier and amplifier service at frequencies up to 2500 MHz.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater voltage
- 6 V
- Nominal heater current
- 1 A
- 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
1 physical section, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.025 S
- Amplification factor
- 100
- Max plate voltage
- 2500 V
- Max plate dissipation
- 100 W
- Max grid dissipation
- 2 W
Promoted from printed planar-triode characteristics and maximum-ratings table.
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.