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Old 9th Jul 2005, 9:17 pm   #3
AC/HL
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Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
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Default Re: Armstrong 625 Receiver

Some info here if it helps. No reference to a 3 pole switch, but there is a thermal delay circuit.

http://www.st-and.demon.co.uk/Audio/600/600faq.html
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