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Originally Posted by andy
Pin 6 is unused and there is a jumper between 3 and 7. Pins 1 and 2 measure 59 ohms and have thinner insulation, so they are probably the vertical. Pins 5, 4, and 8 are the horizontal with pin 4 as the center tap. It measures 6.8 ohms.
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Charles and I seem to have gotten faked out with this one. I get the same resistance readings with a Fluke 77 using an early-production CT-100 yoke.
You may/probably have a genuine CT-100 replacement RCA-manufactured yoke. An other possibility is a yoke from one of the kit-of-parts RCA was selling to rival manufacturers for development purposes in late 1953 and into 1954.
Any indications of use?
Pete