Re: AVO Multimeter survey
I think you're right on the terminals for the 7 & 40 Phil.
The terminals on the Heavy Duty Avo pictured look identical to the type that is seen on certain voltage multipliers and low resistance range extenders designed for the Model 7 and 8. The only other meter i have seen them on is the High Resistance Avo from the late 'forties/early 'fifties (effectively a 4 terminal prototype of the Model 8, but without a transformer)
These terminals are rather spindly and fragile when extended, it is comparatively easy to ding them and bend them. This would probably be why they were superceded by the more versatile (and stronger) red and black terminals. One suspects they had a lot of unused stock of the 'spindlys' and this could be why they turn up on avo accessories.
Dave
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