RCA manual RCA-2CW4, 6CW4, 13CW4, High-Mu Nuvistor Triodes, General Data

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RCA-2CW4, 6CW4, 13CW4

High-Mu Nuvistor Triodes

RCA-2CW4, 6CW4, and 13CW4 are high-mu triodes of the nuvistor type,

intended for use as grounded-cathode, neutralized rf-amplifier tubes. The

2CW4 and 6CW4 are particularly useful in vhf tuners of television and FM

receIvers. The 13CW4 is designed especially for use in antennaplex and

antenna-system booster amplifiers. In these applications the tubes provide exceptional performance in fringe areas and other

locations where signal levels are extremely weak. These nuvistor triodes feature excellent signal power gain and a noise factor significantly better than tubes currently in use in such applications.

The high-gain and low-noise capabilities of these tubes are achieved by very high transconductance and excellent transcon­ ductance-to-plate-current ratio (12500 micromhos at a plate current of 7.2

milliamperes and a plate voltage of 70 volts).

The 2CW4, 6CW4, and 13CW4 nuvistor triodes, because of their unique

design, offer these additional advantages: extreme reliability; exceptional uniformity of characteristics from tube to tube; very small size; and low

heater-power and plate-power requirements. All metal-and-ceramic con­ struction insures ruggedness and long-term stability.

These nuvistors utilize the RCA Dark Heater to insure long life and

dependable performance. The heater of the 2CW4 has controlled warm-up time for use in series heater-string arrangements.

	Elect r i ca 1:		GENERAL DATA
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	Heater,	for Unipotential Cathode:		2CW4	6CW4
	Voltage lac or de).			2.1	6.3 ± 10%
	Current.			0.45 ±6%	0.135
	Warm-up Time (Average).			8
	Direct	Interelectrode Capacitances		(Approx.):
	Grid	to plate .
	Grid to cathode, shell, and heater.
	Plate to cathode, shell, and heater
	Plate	to	cathode.
	Heater to		cathode

Characteristics, Class AI Ampl ifier:

Plate Supply Voltage.

Grid Supply Voltage.

Cathode Resistor.

Amplification Factor.

Plate Resistance (Approx.).

Transconductance.

Plate Current .

Grid Voltage (Approx.) for plate current = 10 fLa.

13CW4

13.5±10% volts

0.060amp

seconds

0.92pf

4.3pf

1.8pf

0.18pf

1.6pf

110volts

0volts

130ohms

65

6600 ohms

9800 f-lmhos

7ma

-4volts

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