Re: [CAD_CAM_EDM_DRO] 48V 10A! Mauch 2A board?

Alan Marconett KM6VV wrote:

> Hi Randy,
>
> Nice find! If you find another one, give me a call! I've come across a
> source of 28v, 6A transformers; I'm going to run them in parallel, and
> maybe even series-parallel. Now to find a bigger cap, I have a 40K, 50v
> cap, but would need a higher voltage for for series, and more C for
> parallel.
>
> Your supply sounds like too much for the L298's, IMO. You might examine
> the primary taps, I assume it's regulated, you could lower the taps, and
> pull off voltage directly across the filter cap. That might possibly
> lower your voltage to an acceptable value.

If it is regulated (sounds like it) changing transformer taps won't
do anything until it drops out of regulation. There should be a voltage
adjust pot on the circuit board, but it probably only has a +/- 5%
range. You might need to modify the circuit a bit to drop the regulated
voltage. Or, you could turn the voltage down with a variac, and live
without regulation.

Jon