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ID = 83298
United States of America (USA)
Brand: Westinghouse El. & Mfg. Co. - see also Canadian W.
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Vacuum Pentode 
  Late but no serial production. For instance only development samples. *****
Identical to WX-3608
Similar Tubes
Other shape (e.g. bulb type):

Base Wires
Filament Vf 6.3 Volts / If 0.3 Ampere

Westinghouse made 4 "matchbox" developmental type tubes. They were numbered with WX and were the -3506, -3608, -3683 and -4073. This was sometime in the late 1950's.

They were designed to be soldered directly to a PCB (circuit board). There was a high failure rate of the fritted seal between the glass and metal, and they never went into production.

They were quickly superceded by the Nuvistor, and then the transistor in the 1960's.

This WX-3608 is a 6AG5 in a square package. 2 leads out one side, 4 leads out the other.

Information source Tube Lore (II)   Page 261

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