That is a typical design. It gives you the 130% on the output having the
wiper wipe beyond the input high end winding.

Martin
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Life; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/


Jon Danniken wrote:
"Grant Erwin" wrote:
I'm puzzled. For sure my wall voltage is connected properly. My
output voltage is showing about 95V (the item is in use at present)
with the voltage set a tad above 80%.

I'm not seeing how hooking up the wall voltage to the slider doesn't
get me a stepUP transformer.

It does, but the core and windings aren't designed for that amount of
current, and will saturate. When that occurs, your input is looking at the
DC resistance of the winding instead of the inductive reactance of the core.

Just for fun, hook the AC main across both sides of the variac, use the
neutral as it is, and pull the AC OUT off of the slider, as follows:

http://sound.westhost.com/beg4-3.gif

Do you still have the problem when using that configuration?

Jon




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