Voltage - Triode (single) ·Triode
Cossor triode valve for receiving and amplifier service; available source material does not establish a narrower functional application confidently.
DHL: Cossor triode valve. The complete Cossor sheet was read for construction, technical data, operating recommendations, and application notes.
European 4-pin base
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
Published ratings/characteristics promoted from the approved datasheet. Cossor DHL indirectly heated 16 V, 0.25 A mains triode for detector or HF service, particularly power-grid detector in DC mains receivers. Maximum anode voltage 200 V. Typical transconductance 4.5 mA/V at anode voltage 100 V, zero grid bias; published amplification factor 58 and anode impedance 13,000 ohms.
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/filament voltage
16 V
Heater/filament current
250 mA
Amplification factor
58
Intended service
High-frequency amplifier
Data set 02
Published operating points and test conditions from this source.
Amplification Factor
58
Published technical-data value