derekm1807
Oct 16 2009, 07:15 PM
Im just wondering what is the cheapest way of controlling the speed of my rvk and my clip on desk fan.
I know there are various controllers etc. and I can wire them in no probs, Im very good with electrics.
Just wanting to know where to get the cheapest device for the job? Though if any present any known problems I would rather steer clear.
Something cheap, and reliable
cheers to any1 who can point me in the right direction
peace
scraglor
Oct 16 2009, 07:19 PM
cheap, get yourself a b&q fan dimmer (dont use lighting dimmer switches!!!!) bout a 10er, although not all b&qs stock them, should be able to find something similar on the net easy enough
immoreorlessalive
Oct 16 2009, 11:07 PM
for £30 (£35 delivered next day) you can get a variac from maplin. ultra-reliable/totally adjustable... check the DIY section.
derekm1807
Oct 17 2009, 02:07 PM
great guys, thanks very much for the info, il have a l%k at what you's recommended
cheers
derekm1807
Oct 18 2009, 01:37 PM
Im running a 150mm rvk fan, and a small desk fan. would the maplin variac 0.75a variable transformer be ok for it?
cheers
StealthShed
Oct 26 2009, 04:41 PM
0.75a is good for 180w ( 0.75(a) x 240(v) = 180(w) ) so you'll be fine, I run a 4" ruck and 2 6"clip ons no probs on the maplins variac.
scraglor
Oct 26 2009, 04:47 PM
QUOTE (StealthShed @ Oct 26 2009, 04:41 PM)

0.75a is good for 180w ( 0.75(a) x 240(v) = 180(w) ) so you'll be fine, I run a 4" ruck and 2 6"clip ons no probs on the maplins variac.

( 0.75(a) x 240(v) = 180(w) ) x power factor, which for motors will be around 0.8 = 140W volts x amps is only correct for DC circuits
StealthShed
Oct 26 2009, 05:08 PM
Yeah fair enough, i stand corrected. Forgot that bit.
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