OddMix VACUUM TUBE - ECH81 |
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.
Features: • 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 Notes: • 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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