MRC Tech 7?

D-I-Y - a $2.00 rectifier and a CW-80 will fill the bill as a 5 amp "power pack".  You can choose full-wave or half-wave too.

Thanks - the idea occurred to me early this morning as I was getting ready for work.  I ordered the rectifiers from Amazon.  I realized I had three CW-80s sitting in a cabinet with nothing to do.

Lee,

I think all the Tech series power supplies featured smoother slow speeds by introducing pulses at low voltage settings and gradually decreasing the pulses and going to smooth DC at higher speeds/voltages. 

I'm not sure if the newest MRC products in the series work exactly the same way electrically. I'm sure they have tweaked the design. But, they certainly produce the same excellent control, if not even better.

I would wonder about the heating effects or noise produced in those little motors by constant half-wave rectified DC.

Jim

Thanks.  I appreciate the information.  I'm going to try the full rectified CW-80 and see what happens.  I really don't expect anything bad to happen, and I hope they result in better control (if not I will try the MRC Tech 7), but it if does turn out bad I figure the can motors I have installed in my bashed/scratch can be replaced easily.