I'm having all the same issues (no RSSI, pulse static, etc.... They just started. I also notice when I wiggle the antenna I can get the transmissions to start flooding in. I'm interested in getting the GPS md as well as the cold solder fix and perhaps you can sturdy up my antenna port as well? I currently use one of your SMA/BNC adapters and its never come off since the day I got it. I sent you an email on your website.The symptoms were nearly identical to before, except instead of getting no RSSI reading while a transmission, I was sometimes getting -40dBm, which is unusually strong. Everything else was the same; super slow scanning, pulsing static on multiple channels, etc. Not relishing the thought of spending another month without the scanner, I opened it up to see what Uniden had done, in the hope that it might yield a clue to the problem. And I found something I'd missed previously:
The other thing I did was shimmed the SMA connector on rear circuit board so it isn't putting lateral stress on the connector. With the front circuit board screwed down lightly, there was a ~0.2mm gap between the inner SMA connector retainer and the case, and when tightening the outer SMA retainer, the rear board was pulled upward relative to the front board, which pulled sideways on the J401 connector.
To solve the problem, I 3D printed a spacer that was 0.2mm thicker than the inner retainer, and installed it so that after tightening down the outer SMA retainer, the two halves of J401 are correctly aligned, and there is no lateral force on it.
It looks to be just the antenna connector that needs to be resoldered on the circuit board. Cold solder joint in the J401 connector shouldn't behave like that when you are stationary on a channel?From what I see the RSSI dropping out and it still receiving is the prime symptom of the COLD SOLDER JOINT.
I sure do get pulsing static. Not all the time but it does happen. Thank you Jon!The antenna joint failing won't cause pulsing static. If J401 has bad joints, pushing on tbe antenna could affect how they connect. I'll post my findings when I get the radio open.
Hopefully not mine! Being it is less than a month old. Dang, I hate being without it!!Having less than fun today. The unit I'm working has oxidation on the underside of the pins, and consequently they really don't want to stick properly even when bathed in flux. I tried wicking out the old solder and restarting with new, that isn't working either. Trying to figure out a solution short of completely removing the connector, scraping the pins, and starting fresh. Getting it aligned properly is a concern, there don't seem to be any indexing pins. It's clearly placed in position by a robot during manufacturing.