Fail over input board for the HP-5087A distribution amplifier

Ed (scskits) Member Profile All Messages By This Member #151223 Recently saw a you tube video of an HP-5087A with an HP designed (I think) fail over amplifier board. I have never seen any documentation on the board before. The board takes a signal from two of the input channels, say A and B and if the A input fails fails, it switches over to the B input. Going to try a modernized version shortly if there is any interest.

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