On Tue, 23 Feb 2016 12:10:46 -0000, MJC
wrote:

In article ,
says...

... Measure the resistance of the heater element from end
to end and you should see about 15 for 117V and twice that for 220V.

Oh, same current and thus twice the power?
Mike.

Ooops. Some day, I'll learn to do arithmetic.

Power = Volt^2 / Resistance
For equal power at both line voltages:
P = 117^2 / 15 = 913 watts (cold)
913 = 220^2 / R
R = 220^2 / 913 = 53 ohms

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558