repairing heathkit meter
Calculating Shunt Values
The most common failures in old D’Arsonval meters that have not been wet,
Remember when you dismantle the meter, work in a clean lint-free location. No
There are two electrical paths. The rear regulator has a wire directly
The locations for bad connections are pressure connection points. They would
The remaining slotted head screw can be checked for snugness. Unless it falls
Do NOT adjust or move anything else! Do not get trash in the meter movement.
After snugging these three points, this meter started to work. It measured
In the front area, the front regulator is solidly soldered to the hairspring.
I dropped some liquid WD40 on the pressure contact area with a wooden
After cleaning this contact, this meter read 50.3 ohms!
Do not adjust anything except position of the regulator
I thoroughly cleaned the inside of the case by blowing it out with air. I
I put a very thin layer of high viscosity pure clear silicon grease near the
Notice all the small white dots. This is trash from the deteriorated meter
Scotch tape works to pick up debris.
Only snug the rear outside nuts. The plastic won’t take much torque. This
I sealed the crack on the OUTSIDE only with super-glue applied with a