"Keith Marshall" wrote in message
...
The first is as per the subject line: What would I need to construct a
PSU
for my 18 volt cordless tools. My batteries just will not keep up. ( I
was
thinking only of a transformer and a full wave rectifier, and wondered
if
I
needed something special to allow the variable speed function to work)

Ideally you would need a transformer (probably a pretty hefty one!), a
rectifier, a couple of capacitors and a regulator plus a few other items
such as a case, etc. You might get by with something simpler but it
probably wouldn't be a very good idea.

But if you're going to go to the trouble of powering it with A/C why not
just buy an A/C drill? Here's one that looks comparable to yours for
about
$90:

http://www.toolsforless.com/cgi-bin/...l?SKU=DW235GRC

Thanks Keith

No, I am in pretty good shape when it comes to AC drills. The thing is
that the darn batteries cost so much that it's not worth the cost to keep
the tools on the road. But the only sawsall I own is an 18V dewalt and it
seems a shame not to be able to use it while I have on hand all the
components to put together a DC power supply for it.


And if you don't need the 1/2" you could buy a 3/8" for even less. It's
cheaper than extra batteries and you'd still have the cordless for when
A/C
isn't available.

I have already bought the B&D 3/8 drill for about 40$US, (two of them),
essentially for the batteries. The extra drills are handy for sequential
type work.)

Thanks again

Bill D

Best Regards,
Keith Marshall


"The universe is full of magical things,
patiently waiting for our wits to grow sharper."
-Eden Phillpotts, A Shadow Passes, 1934
"William G Darby" wrote in message
.. .
A couple of questions that I thought I'd ask:

The first is as per the subject line: What would I need to construct a
PSU
for my 18 volt cordless tools. My batteries just will not keep up. ( I
was
thinking only of a transformer and a full wave rectifier, and wondered
if
I
needed something special to allow the variable speed function to work)

The second is that I found the link below on:
Ernie Leimkuhler and Stagesmith's Massive Metal Links List, and it's got
new
dewalt 18 volt batteries listed at two for $108.99. That seems pretty
good
for an over the counter sale but I wondered if there's any better price
out
there??



http://www.toolsforless.com/cgi-bin/...=DeWalt+page=2

Bill D