More New Toys!

[Steve Thatcher]

basically to get the constant voltage output even when the AC supply goes 
from 90 to 120. A normal transformer will "follow" the line voltage. The 
power supply board uses schottky diodes and the transformer puts out just 
enough voltage to be regulated to five volts with minimal power loss (there 
are a couple of other secondary windings for + and - 12 for RS232). With a 
normal transformer, the power supply design would have to been different to 
deal with the higher wattage that it would have had to dissipate. The 
transformer was custom wound for AMC.

By the way, the EM189 was a 6809 emulator...


the resonant tran
At 10:09 PM 02/25/2005, you wrote:
>   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