1 Jun
2010
1 Jun
'10
2:20 p.m.
Good suggestion Tim and thanks to others for their suggestions too.
I'll give this a try and see how it pans out. I can sure test the
theory with a VARIAC. The original transformer is rated at 7.25V @
10A so I think the current capability is sufficient-- just too low of
a secondary voltage.
On Monday (05/31/2010 at 06:50PM -0400), Tim Shoppa wrote:
Probably the lowest effort option also makes the
fewest changes to the
original: A small external "boost" autotransformer to give maybe 10 or 15%
extra headroom.
This could be done without using a big transformer. What you do is use
a say 20VAC 3A transformer secondary in series with the primary, wired
to that you end up with 140VAC with 120VAC in. This can use a physically
much smaller transformer than a 140VAC 3A isolation transformer.
I'm guessing the AC current at the input to the power supply is circa a
very few amps or so (why I suggest a 20VAC 3A unit above).
Tim.
--
Chris Elmquist