[AMRadio] Transformer help

[wwd at netheaven.com]

Gary Schafer <gschafer at mediaone.net> said:

>Thanks for the response Bill. What I was trying to find out was if the
>particular transformer was rated  220 or 120 volts. It has no markings
>and only a single wound primary. I did find out how to check. By applying
>voltage with a variac 

That was hoped for, or at least that a fuse/circuit breaker of some sort
would be used.  My feeling was that any hypersil core xfmr is probably
good for 240vac- anyone ever seen one that wasn't? 

A 25/40/100 watt bulb in series with the variac and primary will give an
indication of current flow increase if you approach any 'trouble zone'
while cranking up the variac. Only a voltmeter across secondary during
this test, of course.

That primaries normally operate within 20% of overload point seems
rational. A wider margin would not be cost effective.

So you still haven't put 240 across that primary??  <g>

Bill        N2KQA

>73
>Gary  K4FMX


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