ECH21 Triode, Heptode Tungsram Vacuum Electronic Tube

This is an original, Tungsram ECH21 Triode, Heptode electronic tube. Good subtitute is the ECH71, UCH21 - different filament voltage. This tube is designed for RF [Radio Frequency] but useable in AF [Audio Frequency] circuits. A heptode or a triode is useful for many other special purpose circuits like oscillators, RF amplifiers, multivibrators, blocking oscillator, replacement part, circuit research and experimentation or for antique radio, instrument, TV television restoration projects or to set up a private vacuum tube museum. It is NOS tube - New Old Stock, unused, without box, excellent condition.

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HARD TO FIND - EUROPEAN VACUUM TUBE Features: • Triode, Heptode • RF & AF Amplifier, Oscillator, Mixer • MFG: Tungsram • High quality Made in Hungary • Heater: 6.3 V, 0.33 A • Substitute: UCH21 • Plate: 175/300 Vmax - 0.8/1.5 Wmax Triode/Heptode • Base: 8-pin loctal (with center) - all glass Notes: • NOS - [New Old Stock] tube • Without box • Unused - Price: $20 - One available • S/H included within continental US

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