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4HS8 Sharp-Cutoff Twin Pentode RF Amplifier RCA Vacuum Tube

This is an original RCA 4HS8 Sharp-Cutoff Twin Pentode electronic vacuum tube. Dual pentode tubes are difficult to find yet very useful to have, difficult and expensive to make, electronic vacuum tube. This nine pin, all glass, noval type were made for early TV sets and typically used as a high gain RF or IF amplifier, oscillator, usually in class-A configuration in many instruments, radio and television (TV) receivers. Excellent part for antique radio or television restoration, circuit design or for rare tube collection. It is an NOS [New Old Stock] tube with box, unused. Only one available.
4HS8 Sharp-Cutoff Twin Pentode RF Amplifier RCA Vacuum Tube [11 KB]
HARD TO FIND ORIGINAL HISTORICAL TUBE

Features:

4HS8 Sharp-Cutoff Twin Pentode
MFG: RCA Quality Made in USA
RF, AF Amplifier, Oscillator
Heater: 4.2 V, 0.45 A
Plate: 330 Vmax, 1.1 Wmax - each
Base: 9-pin noval, all glass - Collectible

Notes:

NOS - New Old Stock tube Original box
Unused Price: $30 One available
S/H included within continental US
4HS8 Noval 9-Pin Miniature All Glass Electronic Vacuum Tube Electrode Connections
PIN # 1 2 3 4 5 6 7 8 9
Electrode Cathode Grid 2 Anode 1 Heater Heater Grid 3-1 Grid 1 Anode 2 Grid 3-2
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