More New Toys!

From: Joe R. <rigdonj_at_cfl.rr.com>
Date: Fri Feb 25 21:09:52 2005

  Thanks for the info Steve. I have a EM-189 (Z-80) that's missing the pod
so I guess I can rob the x-former out of it.

   I'm curious, why did they use a resonant transformer?

    Joe


At 08:50 PM 2/25/05 -0500, you wrote:
>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
>
>
>
Received on Fri Feb 25 2005 - 21:09:52 GMT