Search results

"Back to the bench" this evening.. Pun intended. I'll go probing some caps and see what I come up with. Again, my most heartfelt thanks to you guys for the help with this!

Just noticed something.. I'm only seeing the delay when I FIRST press PTT. That's the ONLY time it happens. If I keep PTT pressed and go silent, and then audio again, the audio is right there like it should be. That really makes me feel like there's a capacitor in there somewhere that's slow to...

I think that may be the smoking gun. I just checked it and it's 0.105v in TX. Heating up the iron right now to replace it and see what happens. Edit: Replaced D6, no difference. I am seeing a small bump in voltage on the anode now though, up to 0.200v in TX. Edit 2: I probed C30 and on the...

Where the squelch knob is positioned has no effect. I also hooked a speaker up to the PA on the back, switched to PA, and I'm getting audio out of the speaker with the same delay. Yes. Delay on the RF audio and also a delay on the PA speaker audio.

Seems I've answered my own question, just wanted to put some info here for anyone else who may have one of these. Appears they're manufactured by Uniden. I found the FCC ID on the back of one from a video, and Googled it, finding the FCC test information for it, which included some nice...

You guys are unbelievable. First, I need to thank all of you for your help, assistance, and advice. I'm going to dive in this evening and start poking around with my meter and get some measurements. Hopefully with your all's help I can get it working properly.

Anyone have any info on the Roadking RK40? Not the RK5640 (blue lights, discontinued), but the RK40 that looks like a Uniden PC78? Looking for adjustment/alignment information. Thanks!

The carrier is there right away. As soon as I press PTT I get a carrier. The audio is just delayed.

In the video, I delayed keying the mic while I was audioooing so you could see what it does. The radio definitely keys when I press PTT, it’s just the audio is delayed.

I have a Cobra 29 LTD Classic, and I am experiencing an issue that I've never came across. I need a little help, pointing me in the right direction to correctly repair the radio if possible. Everything on the radio works well except for a noticeable delay between when the radio will actually...

Thank you!!

Anyone have any mod info to share on the 505XL? Thanks!

I'd like to install a TopGun MD-1 on my Connex CX33HPC-1 radio. I can't find a lot of information on the EPTDX2912Z board though. It seems even finding a legible schematic for the board is a little difficult. Why does it always seem like it's me that ends up with some off the wall something...

Thanks for your input, guys. It is much appreciated. I'm not going to stress over a small amount of pinch off, and just roll with it. It's cleaner than what it was, anyway. It was REALLY pinched off. Probably 1/2" between peaks on the scope before.. LOL What about the driver/final bias? Does...

I like you, man. You seem to be a pretty knowledgeable guy! Sounds like you've done this a time or two.. I noticed the same. There's a very fine little area there where the carrier slightly pinches, and the audio is at it's maximum. Any more, and it starts getting fuzzy. I just wanted to be...

I've been having a time trying to get my Connex CX33HPC-1 dialed in on my newly purchased oscilloscope. I don't have a proper signal generator, so I've been using a signal generator app on my smartphone at 1000hz, and sometimes a whistle or "auddiiioooo" into the microphone, and adjusting the...

Well, after fiddling with this thing most of yesterday evening and night, I think I've got it figured out. I've already had three of my radios on it and cleaned thier audio up to some nice symmetrical peaks. My biggest problem has been getting enough RF into the scope to see a clean and clear...

Just watched the first video, and it is excellent IMO. Really de-mystified the settings and helped me to understand volts per division. I'm wondering though, is there a proper "volts per division" setting to use when looking at a RF waveform? Or do I just basically want to fiddle with it until I...

Thank you! Also thanks for the video links. I'll be sure to check those out! Is there a widely accepted "safe place" to clip that ground clip on the test lead? I was thinking perhaps the radio chassis?