I am installing a new radio in my plane and have come across quite an oddity.

Verifying wiring to the GIB position, this is what the multimeter gave me:

Pins 3 & 4 go to wires in a shielded cable,
Pins 1 & 2 go to wires in another shielded cable (should have been to the red and black power lines),
Pins 5 & 6 go to the shield of a cable.

1&2 are VDC+ and ground,
3&4 are HS left and right,
5&6 are the mic.

This was originally wired to an ICOM A210 and the radio was mono with one output that fed both pilot and copilot positions.  This was sent to what I believe was a space saver panel?

Still, I don't know how the headset was functioning, at all back there.  I checked my results several times, but got the same result.  I'll be checking again next time I go to work on the plane.

I've ordered a new LEMO jack, but I am dreading trying to pull the wiring through the pilot seatback, especially since the wiring will have to be extended on a new jack to get to the junction I need to tie into.

Anybody got some input on this?

All good feedback, but...

14 hours ago, Marc Zeitlin said:

...the $10K seems a bit high - a 50% premium for doing nothing doesn't sound reasonable to me.

You're basing value relative to the prior purchase price. You wouldn't negotiate with someone relative to the original price you paid for your house, would you? Considering rampant inflation, the scarcity of projects like this, good quality (I am assuming from the pics), and the value of one's time to get this far, "$10,000 or reasonable offer" may be perfect for the right buyer. It's definitely in the ballpark IMO.

6 minutes ago, Ratdog said:

So should I lay up those pieces outside then lay them in just like normal procedure in the plans for attaching bulkheads to the fuselage ( i need to review that ) or build them in place overlaping the layers on the fuselage and whats left of the bulkhead on top and bottom if you understand what i mean.

Either will work. Just ensure that you remove all of the paint and any fill on the inside skin, and sand the surface appropriately for a bond prior to attachment. Just make sure that you have the right number of total plies in the right place, including the F-22 layups and the corner tapes, whichever you do.

8 minutes ago, Ratdog said:

Yes   what in the Cthulhu's name (whoever that is) is the  aluminum washer it looks like on the backside.

That SEEMS to be the aft side of the CNL bushing as shown on page 12-2 of the plans. But it's supposed to be trimmed to be flush - you'll need to figure out what's going on there.

Thanks again Marc for all your help.  Im an idiot but not a total idiot when it comes to epoxy and  fiberglass . LOL.  I have experience with

building model gliders and boats I guess when i say glue i mean epoxy bond .   What your saying sounds like a good solution so I would just use the plans layup .  So should I lay up those pieces outside then lay them in just like normal procedure in the plans for attaching bulkheads to the fuselage ( i need to review that ) or build them in place overlaping the layers on the fuselage and whats left of the bulkhead on top and bottom if you understand what i mean.  Yes   what in the Cthulhu's name (whoever that is) is the  aluminum washer it looks like on the backside  .  Something else to be susicious of ? 

Since my instrument bulkhead and f22 are in trouble I thought i would show off my f28 to see if it is at least ok