[Elecraft] solder iron correct temp in C for K3

[Terry Schieler]

Pretty cool trick, Monty.  But I'll stick with just touching the tip of the iron to my tongue.  Much less painful than doin' the math!  ;o)

Terry, W0FM



-----Original Message-----
From: Monty Shultes [mailto:montys at mindspring.com] 
Sent: Friday, April 27, 2012 5:55 AM
Subject: Re: [Elecraft] solder iron correct temp in C for K3

Another trick, you can do C->F in your head:

Double the centigrade temperature, subtract 10% from the product, and add 32 to get Fahrenheit.
   10 degrees C =  (2*10-2) + 32 = 50 degrees F

F->C is not so slick, but works:
Subtract 32 from the Fahrenheit temperature, add 11% of the result to itself and divide by 2
   50 degrees F =((50-32) + 1.98)/2 = 10 degrees C.