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Ian Stirling
 
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wrote:
John Rumm wrote:
wrote:

It should run on dc without modification. As the OP didnt think to tell
us what it was, we can only guess.


You are assuming it has a full wave bridge rectifier on its input...
(fair assumption certainly, but not guarenteed).


No I'm not.


Yes, you are.
A device with (for example) a transformer in the input circuit, as this
one turned out to have, will simply blow fuses if you connect DC to it.