Heathkit TT-1 Mutual Conductance Tube Tester

Plate DC volts:		26, 90, 135, 225 plus variable 80 to 200

AC volts:		20, 45, 177

Bias supply:		0 to negative 5 volts DC
			0 to negative 20 volts DC

Signal voltages:	2, 1, .5, .25 volts AC 5000 cycles

Filament voltages:	.65, 1.1, 1.5, 2, 2.5, 3.3, 5, 6.3, 7.5
			10, 13, 20, 27.5, 35, 47, 70, 115

Currents:		300, 450, 600 ma

Testing circuits Gm:	(Mutual conductance-amplifiers) 0-24,000 micro-mhos

Emission:		Rectifiers and diodes.

Leakage:		Direct reading ohmmeter

Grid current:		1/4 microampere sensitivity

Voltage regulators:	Firing voltage and regulation tolerance

Low power thyratrons:	Grid characteristics, conduction capabilities

Eye tubes:		Control grid characteristic

Meter AC:		1000 ohms/volt (1 volt full scale)

Meter DC:		80 ma full scale

Meter Scales:		Gm: 0-3000 micromhos.
			VR test volts: 0-200 volts.
			Leakage: 0-10 megohms

Tubes:			1 - 3A4
			1 - 12AV6

Sockets:		4-pin
			5-pin
			6-pin
			7-pin
			combination and pilot light
			7-pin miniature
			7-pin sub-miniature
			8-pin sub-miniature
			octal
			loctal
			9-pin miniature
			blank

Power Requirements:	105-125, 60 cycle AC, 10-60w

Dimensions:	17 3/4" w x 13 1/2" h x 7 1/2" d

Weight:		25 lbs