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Nope, I found one a couple years ago on the EvilBay for $68 shipped. Clean radio. Thanks for responding, though. ~Cheers~

Thanks for the responses! I'm not very up to date on HF rigs these days, as I've been out of the ham scene for quite some time. I didn't think Kenwood had much to offer in that price range, but that's why I came here. Personally, I feel like he should go with the good old solid Kenwood TS-430S...

Howdy folks! I have a buddy that recently got his ham ticket, and he wants to purchase a nice HF rig, but he only is after a Kenwood, and since I know little about Kenwoods, I figured I'd pop in here and get some opinions. He's going to want plenty of bells and whistles, and he wants to buy...

Just as a quick check, if you have not done so already, take the positive wire that goes from the power supply board to the rest of the radio, and disconnect it off the power supply PCB, then check to see if your voltage comes up to 13-14V. I'm wondering if there's a failure on the radio's main...

I agree, I also suspect the PC-70, as it's likely letting DC "leak" onto the grid of that 6BQ5. TV's used to run something similar, and it was called a "couplet" back then, and they were a high failure component. ~Cheers~

Yep, it will work the same for the DX500 as well. ~Cheers~

You get it. (y) However, there will be plenty of clowns out there that DON'T understand this, and they are going to believe that "more is better"... and it will result in a lot of blown amps. :whistle: ~Cheers~

Seems to me that FM on 27mhz (at least in simplex) would be rather inefficient. And 100% cycle duty on any amplification devices used doesn't seem desirable either... I suspect there will be a huge influx of blown up amplifiers in the near future. :rolleyes: I'll just stick to SSB and ~20W...

I would suspect a bad capacitor, has the radio been fully recapped? My 2000 GTL was fully recapped 4 years ago, and it is in constant service, it doesn't sit unused. Even though the mod was not designed to be ran at 1/2W to 1W deadkey, your audio should not fade or fall out, so I would suspect a...

Quick analysis/description of this mod. I know I say ALC a couple of times in there, I meant to say AMC. ~Cheers~

Man, I need to pop in here and read the threads more often... Just been so busy. Looks like someone tried to do my NPC/RC mod, with less than favorable results. A few points to bring up... This HAS to be done with an o'scope, a signal generator, and a spectrum analyzer. Not a power meter...

Those 2879's don't belong in there, that's partly why your SWR is so wacky. The input/output tune will be way off, and the wraps on both the input and output transformers will also be incorrect, as those amps originally came with MRF455's (or similar transistor). The non-regulated supply will...

Yes, should be around .5-.6V or so at the solder trace where the base leg of the final solders to. You can usually get a suitable replacement for L39 out of a junk Cobra AM or SSB radio. ~Cheers~

The failure of the final and L39 wasn't caused by the failure of the MB3756, but rather, C152 failing short. That capacitor passes RF through it, and I have seen the capacitor either fail short, or become leaky, allowing excess voltage to reach the base of the final transistor. The purpose of...

It's doubtful, but possible. When you say it smoked the regulator, which regulator are you referring to? The regulator in the power supply circuit, the MB3756 8V regulator that controls things on the main PCB that's located near the audio IC, or the small 2SC496 located in between the driver and...

Check voltage at the base leg of the final, in TX and RX, shouldn't be very much voltage, maybe a half a volt or so. If you get anything more than about .7V or so, then C152 has failed short, which is allowing the full voltage from the emitter of the driver transistor to hit the base of the...

Replace C152, and C157. These two are disc capacitors located in the driver/final section of the radio. C157 is .0047uF, and C152 is 470pf. Replace those, and let us know how you get on. I'm suspecting one of those capacitors have failed short, which is causing extra voltage to "leak" into the...

These reasons are why I'm so glad I do CB radio repair. I can go on the FB Marketplace, or Craigslist, and buy up 40ch AM/SSB CB's on the cheap, and stick a $30 capacitor kit into them, and get them restored, and I'm good to go. No need to go out and try to buy junk "exports", when a CB will...

There was a guy that was local to me years ago, that ran a "comp" 4 pill, when he'd modulate through it, you could see the ferrites on the output transformers actually rotate counter-clockwise. It was the most insane thing I'd ever seen, and I remember it to this day. Couldn't even imagine how...

Andy is right on top of this one. I also want to note that 40W peak is way too much input for a 1 x 4. That configuration runs best with a single final radio at ~20W peak output, no more. Anything beyond that can cook the driver transistor, or can overdrive the 4 transistors and cook one of...