I went ahead and did the 'touch' test with one end of the resistor to each of those condenser wires leaving the other end of the resistor not touching, and didn't seem to have any luck.
I tried soldering the the same end onto each of the condenser wires to see if a solid connection had to be made and that didn't seem to work either. This is probably my wiring ignorance showing, but wouldn't one end of the 1kOhm resistor have to be soldered to one of the condenser feet, and the other end to the other foot to complete the circuit? Or am I way off? When you soldered yours up aZtec, did you have a particular end touching? (For example, one end of my resistor has the Gold ring on the end, and the other has the Brown ring)
Assuming the resistor modification to the Thales mic won't work for my particular MBITR as it sits, I think I'm leaning towards either checking the wiring on the U-283 and seeing if that can be switched up, or wiring up an On/Off switch to my internal speaker that I can access through the programming cover and do things that way. (A good idea a friend came up with)
Ideally, switching around the U-283 wiring would definitely be more of a permanent fix, but I'm worried about risking the fact that all my current PTT's and headsets work perfectly in this current wiring configuration and I'm really only fiddling with things to get the speaker in order..
For the 152, I purchased it from a gentlemen who did the 2 month wait, and decided he didn't have the soldering/wiring skills necessary to do the modification for PTT's to work. I too saw what you mentioned about the different versions, and personally I think it's all a hoax. The higher prices on eBay are just a premium people are willing to pay to not have to wait 2 months for one. I understand that logic as I have done it with other things, but in this instance I didn't feel the need to.
Edit: Also just to clarify...The posted wiring schemes are for your MBITR's U-283 plug and not the U-283 on the Thales mics, correct? I ask because I was looking back on a couple pictures I took for a mini-review I wrote up for the US MBITR and it seems that the wires coming from my U-283 connector into the circuit board don't have the Green, Yellow, or Blue wires on them . They're mostly Black and White...LOL.
(U-283 being in the lower right hand corner area of course)