These are SWEPT FREQUENCY SLOTTED LINE SYSTEMs, there are two of them. They were made by Hewlett Packard. They are set up as slotted line tuners. The slotted line has APC 7 connecters on both ends. They were used, but are in better than good condition. One has a solid base plate and one does not. The first buyer may choose between the two. The price is for each and the same for both.

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$174.50 USD

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