I love that picture of Einstein and the backs of the electronic gizmos. They are, of course, tube gear, as you can tell by the slots in the rear panel to let heat escape. 73, Dan KB6NU On Aug 27, 2012, at Aug 27,8:43 PM, Andre Kesteloot wrote: > http://www.slashgear.com/what-the-heck-is-ifa-and-why-should-i-care-26243937/