[Elecraft] Battery Charging

[Ron D'Eau Claire]

Years ago a buddy and I had a emergency generator that he built from a pair
of 400 Hz aircraft generators. 

IMX, there is little or no problem running any 50/60  Hz gear off of 400 Hz.
You certainly won't hurt anything.  The problem is when going the other way
-- trying to run something designed for 400 Hz off of a 50 or 60 Hz supply.
The issue there was always the power transformers. 50/60 Hz transformers
require a lot more iron to operate properly. That's why "surplus" 400 Hz
power transformers always look so small and light compared to their 50/60 Hz
counterparts with the same power ratings. 

73, Ron AC7AC



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of EMD
Sent: Monday, October 29, 2012 3:31 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] Battery Charging

Boeing aircraft provides 110volts but the cycles are 400, not the standard
60.  My question is can charging a cellphone or camera battery at the higher
cycle cause harm to the battery?

73, Ed
k3env