hello the problem is not the length of the center pin of the power 
jack on the dec express rather its the diameter of the center pin dec 
used two different size power jacks, so if you want to get the 
correct plug you need to know the diameter of the center pin.  you 
can measure that with a set of calippers.  the measurement is in 
milliameters not inches.  good luck, c u mike



At 06:58 PM 11/12/2012, you wrote:
>Thanks to ka9jcp, both of my dectalks are working again.
>The mystery of the 12 volt supplies is very interesting.
>12 volts is 12 volts is 12 volts.  Plugs are plugs are plugs, but the plug
>on the dectalk supply has a longer center conductor than the standard plug
>of the same circumference.  The center pin on a standard 12 volt supply
>wouldn't meet the center pin of the jack on the body of the dectalk express.
>The outside of the round plug feels to be the same length.
>Who knew!!!
>
>H T Kaufman MSW LCSW
>Adaptive Technology Instructor