Weston 660 Multimeter

This video is a sequel to my earlier video on the Heathkit IM-105 volt-ohm-milliammeter, which is essentially a kit-ized version of the Weston model 660 multimeter that is the subject of this video. I attempt to describe some of the differences between the two versions of the meter, and also add a couple of notes regarding calibration.

I have prepared a 4-drawing documentation package, CAD drawn, for this meter in PDF format. It also applies to the Heathkit IM-105. It includes a full schematic diagram, assembly/disassembly instructions, calibration procedure, specifications, case and printed circuit board (PCB) layouts, selector switch details, and theory of operation. It may be downloaded from:

https://www.serpentwebsite.com/Heathkit_IM-105_&_Weston_660_schematic_&_servicing.pdf

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