[ARC5] Dynamotor prep?

[Kenneth G. Gordon]

> For the first spinup to a 28V dyno, I put it to 12V. If it cranks OK,
> then I take it to 24-28V. I have no scientific basis for this, other
> than going easy on it for its first spinup in perhaps 4-5 decades.

<SNIP>

> Other than checking brushes and cleaning/lubing bearings, is there
> anything else I should before firing up a Dynamotor?

There was a two part article in ER concerning how to 
revive/rebuild dynamotors. One thing you absolutely must do is 
either replace bearings (most are still available) or lube them 
with the proper lube. Even a minute or two with bad or dry 
bearings can damage the armature or the bearing wells 
irreparably.

Ken W7EKB