Don't waste your money on a DME. Too much maintenance.
Purchase a good used IFR GPS.

mindenpilot wrote:
Some DMEs seem to have an indicator, and then a separate receiver box, like
the ARC 800 DME.
Others I've seen just seem to be an in-panel job, like the Narco DME 190 or
the King KN62A.
I've seen some on Ebay, and wanted to make sure that the Narco 190/ King
KN62A don't require an additional recieving unit, like the ARC 800.
That is, if I were to purchase a yellow-tagged Narco 190 (and tray and
connectors), would that be all I need? Antenna?