not sure this is the correct place to ask this or not but here goes, i have a 3 amp 120 volt AC step-down transformer to 20 volt AC, i want to reduce the 20 volts to 10 volts AC, i tried splitting it with two 50 watt resistors but they get very hot without a load, how can i reduce the 20 volt AC to 10 volt AC?
i've attached a picture of the transformer. any help i can get will be greatly appreciated.
Oct 18, 2019 9:30 AM
There are several options - the first one is probably the least work:
here's what i'm trying to do, i want to use it for Etching and Marking of metals, I've converted the 20VAC to DC, the output DC volts are higher than the AC volts, it works as i have it set up today but puts out too much voltage and the product gets hot and becomes hard to work with. Ideally i would like to be able to have variable output power but i am not able to get anything to work, i tried using an AC speed controllers, Rheostats and pods but they do not lower the 20 volts, i know enough about electronics to be dangerous 
... and am looking for some help..
Oct 18, 2019 5:24 PM
A variac (variable transformer) would allow you to adjust the voltage to whatever you wanted.
What is the load?
Is it heater in an etchant bath or some sort of motorized tool?
A simple adjustable DC-DC converter module would allow the output voltage to be adjusted without generating a lot of heat.
What about half rectifying instead of full rectifying. Doesn't that impact output voltage? Old man using his old electronics knowedge.
Sean
>>There are several options - the first one is probably the least work:
Any suggestion which way to step down 48ACV to 24ACV 500mA adapter?
Jan 7, 2021 5:07 PM
Hammond transformer 187D56Hammond transformer 187D56
I think you bought the wrong train set... 
Lionel appear to do a hobby transformer with split variable outputs:
