19 set PSU capacitor

[Chris Suslowicz]

Originally Posted by eddy8men

...I have also bought a 30uf capacitor from ebay which was rated at 450v A/C but could anyone confirm if this is ok with the dynamometer. ie does it produce AC or DC...

cheers

rick

That will be a phase shift capacitor for an AC induction motor and will be perfectly OK for the job. The only things that matter are the capacitance value (and 30 is easily close enough to 32, especially as the electrolytic capacitor tolerance is something like -10/+50%) and the voltage rating.

The dynamotor produces DC with a certain amount of commutator ripple on top, and the capacitor is there to flatten that out and prevent a whine on the set audio.

Best,
Chris.
p.s: Nice tank! (If I didn't know better I'd have accused you of having pinched it off the production line.)

[eddy8men]

thanks chris, comms always seem to be a bit of a dark art to me, even when I was in the army I never really knew what I was doing !

the Cromwell is a real beauty to be sure, it's just a shame it nearly bankrupted me doing it