Taurus Flyer,
The brown out I described about the Airtronics was due to 5 servos on a 4.8 volt receiver pack momentarily drawing more power than normal off the battery, this was due to a retract servo that stalled on mechanical retracts, thus taking power away from the receiver momentarily, causing the 2.4 receiver to re-boot/reset. At the altitude it was at, it was too long to recover before crashing. Had the receiver been 72mhz, this would not have affected it at all, and the plane would still be here.

Specktrum has had it's fair share of early brown outs too. And this latest issue I had with the AR500 receiver, now that I have done the google search, shows that Horizon had a slew of issues with them, and it Looks like the China based manufacturer supplied cheap faulty parts for the receiver, and Specktrum yanked them from production. They can't even be found on their website under discontinued.

Glad to see the old stuff still flying! I love the old ballistic pattern of the 60's thru the 80's, and have a few of my own, although I do like flying the newer radios, I do have a Futaba FG Gold 7 channel converted to Assan 2.4 with a DIY kit from HK.....and it works awesome too!