[GreenKeys] Creed 7B with DC Only Mor

Sam Hallas s.hallas at ntlworld.com
Mon Feb 23 15:51:12 EST 2015


Dave Horsfall wrote:
> On Mon, 23 Feb 2015, Dave G4UGM wrote:
>
>> I know most of the members are probably US based so this question might
>> not get far, [...]
>
> Well, it got as far as Australia :-)

And the UK.

>> why would any one want a DC only 160-250V motor? Would it be run off the
>> loop supply?

As far as I recall the Creed Model 7 teleprinters for the British Post 
Office were all supplied with DC motors. I used to run mine from a 
full-wave rectified output of a 240v to 120v power transformer.

I have no idea what the reason was, but as previous correspondents have 
said DC mains supplies were around a lot longer than you  might think.

Cheers,
Sam



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