[Milsurplus] rotary inverter

[Patrick Jankowiak]

I've had an unusual experience with dynamotors, they were new 
D-401? dynamotors, 12VDC in / 400-450 out at 180mA. I got them 
from Fair radio, still sealed in the cartons.

I built a car stereo power amp 
(http://www.montagar.com/~patj/tubeart.htm) and discovered that 
when I used the amp, the dynamotors emitted a sort of nasty 
smell. It was not overheating, nor ozone, but an odd 
chemical-like small, which was kind of nauseating after a while. 
I thought it was unhealthy. In the summer with the windows up and 
A/C on, it got prety bad. The amp was mounted behind the driver 
seat in a van.  I had serviced the bearings before use, etc.. so 
I have no idea what. I have never smelled this on an old used 
dynamotor. Could it have been the brushes wearing in and I was 
inhaling the smell of that? Real wierd.

Anyone have a similar experience or know what kind of odor that 
is/was?

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On another Fair Radio note, I wish they'd put the dynamotor 
ratings on the dynamotor page, so you could see what you were 
selecting from. The prices look good.

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Best regards,

Patrick