6AB7

6AB7 is also designated 1853.

Description

The 6AB7/1853 is a high-transconductance, semi-remote cut-off amplifier tube intended for television RF and IF amplifier service. It is a metal-shell tube with a coated unipotential cathode and a small wafer 8-pin octal base. The control-grid lead is brought out to a base pin rather than to a pin cap, using a special shielded lead construction. The tube may be operated in any mounting position.

Ratings

The heater is rated at 6.3 volts and 0.45 ampere, AC or DC. Under any condition of operation, the heater voltage should not deviate more than plus or minus 10% from the normal value. Maximum plate voltage is 300 volts, maximum screen voltage is 200 volts, and maximum screen supply voltage is 300 volts. Maximum plate dissipation is 3.75 watts and maximum screen dissipation is 0.65 watt. Maximum grid-to-plate capacitance is 0.015 μμf, input capacitance is 8 μμf, and output capacitance is 5 μμf. The maximum overall length is 2-5/8 inches and the maximum diameter is 1-5/16 inches.

Applications

The 6AB7/1853 is intended for use by the amateur and experimenter in experimental television receivers. It is recommended for use in the RF and IF stages of the picture amplifier of such receivers, particularly those employing automatic gain control, and can also be used as a mixer or as an oscillator in low-voltage amplification. The tube has an extended cut-off characteristic and a high value of transconductance, with appreciable changes of input capacitance and input conductance with plate current. The suppressor should be connected directly to ground in RF and IF stages to minimize feedback. Screen voltage may be obtained from a potentiometer, a bleeder circuit across the B-supply source, or through a series screen resistor; use of the series screen resistor provides a somewhat more extended cut-off characteristic than is obtained with fixed screen voltage.

Equivalence is asserted only where the archive's own literature states it directly, in at least 40 separate documents. Tubes that merely substitute in some circuits are not listed here.

Original manufacturer datasheets for 6AB7, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• Television Amplifier Pentode (filed under 1853)
• Personal Company