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Bias Meter I-97-A is for measuring bias in teletypewriter signals and is used in connection with adjustment of spring tension in Western Union 41-C type relays as used in Line Unit BE-77, a component of Telegraph Printer Sets EE-97 and EE-98.

I-97-A.jpg I-97-2.JPG I-97-3.JPG I-97-4.JPG I-97-5.JPG I-97-6.JPG


  • Bias Meter I-97-A War Dept. Aug.14, 1943

Adobe PDF icon.png TM 11-2200 1943