More New Toys!

[Steve Thatcher]

AMC used a resonant transformer in the Em series. It has no primary taps on 
it for switching voltages. It also needs to run at the required frequency. 
Joe's first thought of scavenging the transformer (and cap) from other box 
is the only way to go.

best regards, Steve Thatcher

At 08:07 PM 02/25/2005, Dwight K. Elvey wrote:
> >From: "Joe R." <rigdonj at cfl.rr.com>
> >
>---snip---
> >
> >  I also found another Applied MicroSystems microprocessor Diagnostic
> >Emulator unit. These one is an EMM-188 for the 8080 and 8085 CPUs. I also
> >got an EMM-188 pod with it for testing 8080 circuits. It appears to be in
> >new condition, there's just one problem, it's wired for 220VAC 50Hz! I also
> >got the original fitted case for it but it has a problem too. The interior
> >was made of that foam that likes to turn to goo after a while! It took a
> >bit to get everything cleaned up! Anybody know what it takes to convert one
> >of these back to 110 volts or do I just swap the xformer out of one of the
> >podless ones that I have?
> >
> >
>
>Hi
>1. Use another transformer of about half the core weight as
>an autotransformer to step the voltage up to the 220V. This
>doesn't have to be a 110 in to 220 out full transformer, just
>one that has the split primary. You only use the primary.
>2. Look to see if the transformer already has two primary windings
>that can be arranged for 110v.
>Dwight