Radio Tube UBL1

by tomelec - uploaded on August 24, 2012, 8:21 am

This is the schematic symbol of an old radio tube from the 1940´s. It´s the UBL1 Duodiode-Output Pentode.

Tags
Elektronik duodiode electronic output pentode radio tube ubl1 tube vacuum
Safe for Work?
Yes

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