[Heathkit] Heathkit IM-18 meter mystery

[Jim Shorney]

On Mon, 5 May 2008 13:50:18 -0700, Bob Macklin wrote:

>The IM-18 is just a later version of Heath's standard VTVM. The plug in the
>center is for the 10M probe and is a standard 1/4" phone jack.


The jack is standard, but the plug was not; it has an extra-wide insulator between the tip and the barrel to 
allow measurements of high voltages without arcing over.

73

-Jim
NU0C