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I know these are considered "throwaway radios", but I just can't leave anything alone! I feel like I've searched everywhere that I could and can't find any information on this thing. A schematic would be great. (I'll add the board number tonight, when I get home from work, It might "jive" with...

Try ICAmanufacturing.com. The 2SC2312 or 2SC1969, both from HG work great for repair replacements or "hotrod" builds. The MOSFET conversion is actually easier than they make it out to be.

I didnt think of that, I just replied before I saw this.

Here is a quick and easy clairifier unlock that leaves everything centered and doesen't add an uncontrolable amount of range: Lift one leg of D52, Lift the "long" leg of R44, Solder and shrinkwrap a wire from the lifted (top) leg of R44 to Pin 1 of the Voltage regulator. Done. Now the RX and...

Does it look like this one? If so I can make a list of my favorite modifications. I picked many of them up here in this forum. There are so many, try searching PC409, Grant XL, 148 GTL. The boards are slightly different, but function simularly.

I had a few pop using silicone isolators, also noticed the bias resistors looked like they got hot too, like the tab was shorted. When I ohmed the tab to heatsink, there was no continuity. I used the same isolator with a spare 2078 and everything was fine. I wonder if its some kind of...

Wow! Thanks!

33K was way too much, I ended up with a 10K in there, I tweeked between AM power who gave me the max and dead key, and the limiter who corrected the clipping, there were a trade off between the two. I ended up with a 3/4W carrier and a nice clean 16W PEP and plenty of growth even after the RM203...

I get most of my radios in non working condition, with blown traces, other weird mods, shorted caps, missing parts, smoked transistors and/or mystery issues. This one was full of bad solder joints, melted L26 top with missing core, and had a weird talkback mod along with some blown traces. The...

Here is with a 33K across the diode resistor combo, now I can fix Frankensteins head, but it it's weird and chunky looking through the cheap amp. Here's some video.

https://photos.app.goo.gl/dzyvvgWVTEon3Cug8

I'll try to keep it short. Uniden PC122 I tried a diode in series with R186 to lower the AM deadkey to use with a small amp. On the meter It worked great, with 1W deadkey, 9W Avg/18W PEP. On the scope I can remove all negitive carrier pinch but, even with the limiter all the way up I still...

I cleaned the crud out of there and dried it with compressed air, and found no change. I did however notice that when I held a metal spare antenna mount over the area with the final and L14 the issue would appear again. I assumed it was L14s inductance changing the output. I removed L14 cleaned...

Here is a link to a video I made to describe the issue: https://photos.app.goo.gl/k2RJ2Z1LfB9E2HHw6

Thanks both of you I'll give those board screws a feel tomorow. I'm thinking about an SDR with adjustable display for looking at output spectrum. It would be even better if someone local had one streaming, but no luck with that yet....

Hello everyone, this is my 1st thread, it's going to be more question with a small introduction. All of my radios were either given to me, or purchased for a few dollars. They were mostly basket cases that were replaced by something more modern and some from retired Truckers. Every time I...