How do you bring down track voltage 14v to 8 v

easiest way is to use a variable transformer like a Lionel 1033 and adjust the voltage for what ever you need. you can buy them on eBay.com

Alan

Use a single diode, in series with  18VAC will give about 8.4 volts RMS  half waved pulsed DC. Each additional diode in series will drop voltage by about  .7 volts.

Dropping voltage with diodes is explained here

LINK

Or use a buck converter,explained here

LINK2

Dale H

i worked through the decade or so when modem speeds were increasing two to four fold every year which ultimately made hundreds of models outdated in a very short time and though the modem itself would often be tossed, i hung on to dozens of modular power supplies with various voltage (ac and dc) and wattages.  in town there are also a couple of used electronic supply outlets where i can find bins of similar power supplies.

when it comes to running just about any accessory, there is definitely a sweet spot narrow voltage range that i typically first find with a variable transformer but then look and often find a modular power supply that will act as the dedicated power supply for that accessory.  unlike a common accessory bus, the target accessory will see its perfect operating voltage without the possible drops which might occur with a common accessory bus feed.

cheers...gary