A couple of months back I discovered that both of my newly acquired Z4000 transformers did not reduce power all the way down to zero, as I lowered the throttle handles (old thread on OGR Forum). Turns out this is not uncommon. My transformers will get down to about 7 volts, and then drop to zero immediately the throttle handle is slowly moved south.
This is causing problems with a couple of my PS1 loco's (early QSI boards) in they won't come out of "neutral" to move forward upon start-up. Thank you Jon G. for the background info on these early QSI boards.
Anyway, I have since learnt the problem can be overcome by fitting a "resister" on the output variable posts to slowly reduce the voltage from 7V down to zero gradually.
Went to my local electronic store (Jaycar) here in Australia, and told them what I had been told, and they just looked at me as if I was from another planet!!! Seems I have to tell them the type of resister I need, as these things are made for all types of applications, and I need to know the "rating" of the resister I need.
I left the shop more confused than what I was when I entered it.
Bottom line......can any of the truly smart, intelligent, electronic techs on the forum tell me exactly what part number/code/identification symbol I need to go back to "Jaycar" and get the right resister I need to fix my problem??
I have no idea what "resister" I need......I am like a Diesel Fitter....I can install anything on a machine, but I certainly can't figure out what the exact part number I need should be!!!