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408A RF Pentode Western Electric Electron Tube High Frequency Oscillator Amplifier

This is an original Western Electric 408A HF, UHF, RF pentode seven pin miniature electronic tube. Substitute is American type 6028. Developed to be used in low microphonic noise environments by Bell Telephone Laboratories for HF [High Frequency] and UHF [Ultra High Frequency] amplifier and oscillator applications. May be used for special purpose circuits, oscillators, RF amplifiers, circuit development, antique radio, television restoration projects or to set up a private vacuum tube museum. It is new, unused, OEM no-box electronic tube. Only one available.
408A Western Electric RF Pentode Electron Tube High Frequency Oscillator Amplifier [7 KB]
HARD TO FIND - HISTORICAL TUBE

Features:

408A RF Pentode Electronic Tube Ruggedized
MFG: Western Electric - for Bell Laboratories
High quality Made in USA Collectible Tube
HF and UHF Frequency Amplifier, Oscillator
Heater: 20 Vac-dc, 50 mA - Indirect
Plate Voltage: 180 Vmax Substitute: 6028
Plate Current: 18 mAmax, 1.7 Wmax
Base: 7-pin miniature, all glass

Notes:

New, unused OEM tube Without box
Price: $12 One available
S/H included within continental US
408A 7-Pin Miniature All Glass Vacuum Electronic Tube Electrode Connections
PIN # 1 2 3 4 5 6 7
Electrodes Grid-1 Cath G3 Heater Heater Anode Grid-2 Cath G3
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