Vacuum Tubes

Miniature medium-mu twin triode in which each section exhibits a remote-cutoff characteristic. It is designed primarily for use as a cascode radio-frequency amplifier, intermediate-frequency amplifier, or mixer

Filament type triode power amplifier. It is designed for service in the output stage of audio amplifiers where high output and low harmonic distortion is desired.

Filament type triode power amplifier designed for service in the output stage of audio amplifiers where high output and low harmonic distortion are desired.

Beam-power pentode intended for service in high power, high-fidelity audio equipments and is capable of 100 watts output in push-pull circuitry. It also finds application as a regulator tube.

Contains three high-mu triodes with separate pin connections for all three cathodes, grids, and plates in a compact T-9 glass envelope with the novel 12 pin base.

Special quality double triode designed for use as cascode amplifier, cathode follower, etc. in RF and AF circuits.

Electron-ray tuning indicator with triode unit and two indicating sectors of different sensitivity.

Glass octal beam power pentode designed for use as an audio frequency power output tube. The tube has a high power sensitivity and high efficiency and is especially designed for applications where high power output is required.

Miniature type pentagrid converter designed for use in low drain battery operated receivers.

Beam-power pentode primarily designed for use in audio-frequency power-amplifier applications. The 7581A is unilaterally interchangeable with the 7581 and the 6L6GC.

6A5G is a heater type power amplifier triode designed for the same service as types 6A3 and 6B4G. The tube is equipped with an octal base. This tube is quite free from hum so that no potentiometer is required for hum balance.

Beam power pentode designed for use in horizontal deflection circuits of color television receivers.

Triode, Power Amplifier, United States

Gas-filled ballast tube designed to maintain a relatively constant current over a specified operating range.

General-purpose transmitting beam power tube of the thoriated-tungsten filament type designed for use as an rf power amplifier and oscillator as well as an af power amplifier and modulator.

Beam power tube, 9 pin miniature type, for high-fidelity audio-amplifier applications

Power pentode for output stages of high fidelity audio-amplifiers and radio receivers

This is a set of measured vacuum tubes for use in TV-7 vacuum tube tester calibration. The values for each vacuum tube will be measured and included for the purpose of calibrating your own TV-7 tester at home. Steps for this calibration can be found online. Three tubes will be included:

• 6L6
• 6AU6
• 12AT7

These tubes are tested at the following settings: Tube Filament Settings Bias Shunt Range 6L6 6.3 HS5-3481 23 0 D Tube Filament Settings Bias Shunt Range 6AU6 6.3 ET1-5672 16 0 B Tube Filament Settings Bias Shunt Range 12AT7 12.6 EV7-6080 10 0 C Note that brands are not guaranteed to match photograph.

Triode, Double, Western Electric brand

Beam type aligned grid power amplifier. It has a unipotential oxide-coated cathode, a hard glass nonex bulb, and a glass base with short tungsten leads. The tube has a heater designed to operate from a 6.3 volt supply.

Twin output pentode for use as an audio-frequency output tube in stereophonic radio receivers and recorders, push-pull output tube and as line frequency oscillator and reactance tube in television receivers.

Low-noise, low-microphonic miniature twin triode designed primarily for use in the low-level stages of high-gain audio-frequency amplifiers.

Triode-pentode designed primarily for high fidelity audio applications. The pentode section is particularly suited to preamplifier service while the triode section is intended for use as a phase inverter.

High-vacuum, heater-cathode type of tube designed to indicate visually, by means of a fluorescent target, the effects of change in the controlling voltage. The tube, therefore, is essentially a voltage indicator