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Re: [T3] Tach's!


On 25 Oct 2002, at 21:33, Keith Park wrote:

> So then I started cooling each of the components... and none made any
> difference till I got to the COIL on the armiture... it made a HUGE
> difference... read low when it was hot and high when it was cold... by
> several hundred RPM!

Facinating! I suppose it is just the change in resistivity of the copper at 50C, 
but I doubt if it actually ever runs at that temp for long. You certainly wouldn't 
want to be in the car with it at that temp. My guess is that this is just 
something that might force an error when you first got in the car on a hot 
day. 

Keep in mind that temps like these are hard on your dash, too. That's one 
reason I almost always leave each side window open about 1/4" whenever I 
park the car. Just a little bit of cross ventilation will really shave off those 
peak interior temps.  

-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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