MadModder
Gallery, Projects and General => Neat Stuff => Topic started by: tom osselton on August 20, 2013, 03:09:04 PM
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Found this interesting a pcb variable speed control
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Hi Tom
No idea why they used drain cleaner, salt water rheostats were one of the earliest forms of high power load resistors ..
Quite often used to test radio transmitters without using the aerial and splattering crap all over the aether.
http://en.wikipedia.org/wiki/Liquid_rheostat (http://en.wikipedia.org/wiki/Liquid_rheostat)
Me and a bloke called Faraday used 'em .... :scratch: :scratch:
Dave BC
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we used to use these at work, to load setm tubine generator sets up
had 4 or 5 tanks, no adustable plates, runnning about 4 mW of load
it steamed a bit!!
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we used to use these at work, to load setm tubine generator sets up
had 4 or 5 tanks, no adustable plates, runnning about 4 mW of load
it steamed a bit!!
4 mW i.e. milliwats is about right with lab experiment :)
PekkaNF
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That was the standard way of dimming theatre lights in the 1920''s & 30's
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I noticed that too, Pekka, but was too polite to mention it :lol: :lol:
I was on an electronics forum the other day, someone had a Magnetic Pick-up that apparently gave 20MV output .....
WOW :zap: no need to bother with amplifiers then ????
Dave
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I just thought it was kind of neat, I mean hell here I am using a dimmer switch!! :doh: I'm not too knowlegable about electronics basic stuff I'm ok on but more complex I just scratch my head and say hmmm.
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ooppsss tooo many beers !!
4 MW :doh: :doh: :doh:
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ooppsss tooo many beers !!
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Wouldn't like to think of wasting beer as the load cell liquid! :beer: :zap:
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that looks scary as hell.. why would one do that. :bugeye: