6 Jun
2010
6 Jun
'10
3:52 p.m.
On Sunday (06/06/2010 at 08:49AM -0600), Ben wrote:
Ya... thanks guys. The transformer is rated at 7.25V @ 10A. But it's
not even able to do 7.25V at 5A so I think it is the culprit.
I can't find any hidden choke either so they weren't relying on any magic.
Good chance this transformer has been "bad" since the day I built the
machine.
I think I have converged on my solution. I have two new Triad
transformers that when bolted to a piece of aluminum angle stock,
suitably cut to size, will fit stacked in the same footprint as the
original transformer. Therefore, I won't need to drill any new holes
in the chassis, will have a "period" accurate modification and the thing
should work as was originally intended.
Thanks for playing along.
Chris
--
Chris Elmquist
I should note that a transformer rated at 5A AC will not provide
5A DC. Because the rectifiers only take power on the peaks of the
cycle the power in the transformers windings are much greater
than if it was a continuous load. One needs to derate the transformer
some.
Dwight
Unless you have big choke hiding in the circuit. :)