I've replaced many antennas on many receivers (never spektrum) and it always worked. I see no reason you can't just solder it back on.
Do you have a separate bind plug along with the 4aa holder? I know earlier spekky units had a bind plug that jumpered two of the three rx pins together. So, if you don't have a separate bind plug I would say that spekky probably did wire the 4aa holder to also do the job of a bind plug.
I'll google bind plug wiring and report back if I find anything...
yes bind plug is separate...so i may just buy a small rx pack to make it work.
I will just try to re-solder the antenna on and see what happens
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S
those 4 and 8 double A holders are notorious for bad connections, and they bend easily compounding the problem. I have a 4aa holder here for rx and servo troubleshooting that is wrapped in 3 directions with zip ties to make contact.
a rx pack would definitely work. or you could get out the voltmeter and troubleshoot your 4aa holder.
You did have the dark color on the battery plug to the outside of the rx case, right
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It's "Dr. _paralyzed_" actually. Not like with a PhD, but Doctor like in Dr. Pepper.