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RD27AS

Directly heated Tesla power triode for Class C RF amplification, oscillator service, and AF power amplification. With about 27 W anode dissipation, it provides modest transmitting power to roughly 25 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B4
Base pins: -
Nominal heater: 4 V / 2.15 A

Description

The TESLA RD27AS tube is a directly heat- Die TESLA-Rohre RD27AS ist eine direkt ed triode of 27 W anode dissipation, in- geheizte Triode mit 27 W Anodenverlust- tended for application as a class C power leistung, bestimmt zur Verwendung als amplifier or as an oscillator at freguencies Klasse-C-Leistungsverstárker oder Oszil- up to 25 mc/s, or as an AF power amplifier. lator fůr Freguenzen bís zu 25 MHz, gege- benenfalis auch als Niederfreguenz-Lei- stungsverstárker.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B4
Base pins: -
Nominal heater voltage: 4 V
Nominal heater current: 2.15 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

Amplification factor: 9.5
Max plate dissipation: 27 W

Promoted fields populated from published maximum-ratings/characteristic tables where OCR semantics were unambiguous.

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 01

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Heater voltage
4 V
Nominal or midpoint of published heater range
Heater current
2.15 A
Nominal or midpoint of published heater range

Other

Maximum anode dissipation
27 W
Published tube rating

Capacitance

Interelectrode capacitance Cgllk
9 pF
Published source value
Interelectrode capacitance C,/k
3.5 pF
Published source value
Interelectrode capacitance Ca/gl
6 pF
Published source value

Data set 02

1966 Tesla Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
4 V
Heater current
2 A to 2.3 A