AUL Instruments TVM4 multimemeter

[Neil Barlow]

Hi Folks,

Recently, I have acquired an AUL Instruments Model TVM4 transistorized voltmeter (probably ca. late 60's , early 70's). After fixing a few obvious problems, the device appears to be operating on most or all functions, but is quite out of correct calibration. I don't have a manual or schematic. Thus, I am unsure as to the function of the some the adjustments available on the circuit board. I may still have one or two undiscovered electronic problems on the board as well.

A search of the net has not turned up anything in the way of a manual, schematic, or cal procedure. Is there someone here who could point me in the right direction?

Thanks much!

Neil