Electronics > Metrology

Strange ESI RV722 for sale on ebay

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Macbeth:
On ebay, an ESI RV722 [SP2665] for sale, whatever that is - perhaps a custom produced item?



Now what on earth are the Centronics connectors on the back for?

Vgkid:
Interesting, I saw that one as well.
 If it was a longer unit, possibly computer driven remote operation. I know GenRad produced some decade resistance/capacitance boxes.

babysitter:
Hopefully just each switch sandwiched to a second switch to report their positions, and no real meddling with the divider circuit.
Maybe there might be even little motors to turn the switches remote-controlled.

Low speed RDAC :)

Vgkid:

--- Quote from: babysitter on April 07, 2016, 10:22:11 pm ---Hopefully just each switch sandwiched to a second switch to report their positions, and no real meddling with the divider circuit.
Maybe there might be even little motors to turn the switches remote-controlled.

Low speed RDAC :)

--- End quote ---
That is how it was donein the Genrad box that was listed for parts. You could see the motor/gearbox, couldnt see the encoder/position sensor.

lowimpedance:
In the close up pic of the rear connectors you can just see some faint 'scribe' lines for the cut out where the connectors fit through, so my guess is an user mod for positional readout !.
 Also the old catalogues make no mention of any variations on the standard box, ie options like motorized or otherwise. (not to say the custom mod was not from ESI itself though)

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