I got the adapter in the mail and FedEx delivered my new 55" TV, so I've been experimenting with various setups and have everything running nicely!
Right now I have a laptop hooked up to the TV via a DVI-to-HDMI cable (no HDMI on my Dell D630 laptops) and the helicopter headset connected to the laptop via the adapter cable. In the pic below I'm playing a short movie on the laptop and watching it on the big TV. Glorious!
A big Thanks! to spangy/Greg!
The headset cable is a bit ungainly (no pun intended) but I can live with it. I don't expect to ever fly a UH1-E but I like to leave things intact so I'll refrain from clipping off the 'copter jack.
Eventually I'll move the laptop setup to the computer room so I can send images/movies right from the Internet to the 55" TV. Or DVD movies. Or YouTube. Or UConn Womens Basketball, streamed live.
Edit: For most TV series, sports, news, I'll run the 3.5mm TV headphone jack to a pair of PC speakers next to my couch. This TV has rearward-facing internal speakers which to me distorts the sound. The Avevia had forward-facing internal speakers which added to the overall width but sounded great.