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ECH81 Triode, Heptode Siemens Vacuum Electronic Tube

This is an original, Siemens ECH81 Triode, Heptode electronic tube. 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.
ECH81 Triode, Heptode Siemens Vacuum Electronic Tube [9 KB]


Triode, Heptode
RF & AF Amplifier, Oscillator, Mixer
MFG: Siemens High quality Made in Germany
Heater: 6.3 V, 0.3 A Substitute: 611P
Plate: 250/300 Vmax - 0.8/1.7 Wmax Triode/Heptode
Base: 9-pin Noval - all glass


NOS - [New Old Stock] tube Without box
Unused - Price: $25 - One available
S/H included within continental US
ECH81 Noval 9-Pin Miniature All Glass Vacuum Electronic Tube Electrode Connections
PIN # 1 2 3 4 5 6 7 8 9
Electrode Grid-2,4 Grid-1 H Cath G5 SH Heater Heater Anode H Grid-3 Anode T Grid-1 T
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