I am not familiar with that particular dynamotor, so I am unable to tell you
which lead is positive and which negative (although it should not be too
difficult to determine it).

In all cases, please be informed that dynamotors typically have a very high
inrush current. If you use a modern stabilized power supply, the overcurrent
protection will surely trip.

Possible solutions a

- to use a plain suitably-sized non-stabilized power supply (just a
transformer, diodes and a capacitor)
- to feed the dynamotor with a car battery kept steadily charged by (any)
suitable power supply

After problem will be solved, I fear you will anyway want to build an
ad-hoc P.S. replacing the dynamotor. Most often dynamotors are so noisy one
can't stand them!

Tony I0JX
Rome, Italy

"griddip4" ha scritto nel messaggio
...


Hi I have a 12 volt in 600 out [dm35] It takes 18 amps to turn it over
When I connect it to a 25 amp P.S. It puts the P.S. into protection How
do you know which is pos. or neg. on the dynamotor? I wanted to run a
274n transmitter with out building a P.S. thanks 73 Darryl




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griddip4