Well, Radioshack is a no-go. They have transformers in 18v and 22v. However, no 20v They said that it seems that transformer was specifically made by the company for that specific product. Of course, CandH no longer supports or carries it per previous post.
18v or 22 v is close enough. Just make sure the transformer can handle the amperage u need. When manufacturers make standard electrical products , they realize that voltages that come out of your wall socket vary from place to place or town to town so to speak. for instance: I may have 110 volts at my house, u may have 115. The output (secondary side) of a transformer is only a ratio to the voltage that goes into it (the primary side). They allow a bit extra in voltage ratings for any particular component using a fundamental power supply.. I would get the 18v if it can handle the amps u need. Put a voltage meter on it. u may have 20 v coming out of it anyway. My point is u can buy a 20v transformer and get 18v or u can buy a 18v transformer and get 20v depending on what your voltage is coming out of the wall . Also, the windings in the transformers which determine their voltages in and out are only accurate to maybe 2% to 5% anyway.
Either way u probably only need maybe 15v to get it to work and maybe 25v to 30v to kill it. Trick is to get a transformer with a plug that fits into the unit its self so u dont have to go in an hardwire it.
