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I had the same problem with my 002a yesterday. The variable resistor on the control panel wasn't properly varying due to dirt. The aluminum case is crimped over the Garolite (phenolic-fiberglass) backing and easily uncrimped with pliers. remove the nut on the front and clean it with tuner...

Sweet. That is easily servicable layout. We have to repair as much as possible in this avocation, spares can be pricey. Now I do have access to an oscilloscope but no bridge. I might be able to kludge together a testing apparatus for capacitors. Of course that would require component...

Capacitors can dry up or more commonly, bulge. Either way, they lose capacity :mrgreen:. Really, think of them as surge chambers. Piece of cake to replace all, it takes too long to test each one. Other things are pots burning the wiper contact area. Also easy to test. But testing the...

Take a good picture of the old board. I might be able to repair the old one.

Frequency is dependent on the RPM of the engine which is dependent on the governor and engine reacting to the increased torque from varying demands. Being purely mechanical control system, it balances centrifugal force against a spring force, much like any mechanical injection diesel. Put a...

There are plans to make a voltage regulator test unit in the -34. But if you have a new VR source, that might be cheaper, if not easier.

No, it isn't safe with the panel open BUT if you must, use insulated tools and rubber gloves. 120 volts is present on a few terminals. As to load testing, you can do it at 2 and 3 wire single phase as well as 3 phase 4 wire connections. The field lighting sets are good for this, if you can...