Recent content by boog351

From what I've found the problem was fixed in the 756pro and later models, the part is a driver for the pa section, in previous models, the 756 and 746/746pro, that part was prone to overheating, icom claimed esd issues as well,. The part dissipates heat through it's ground legs, it's an 8 pin...

It's a no go getting the part from icom, they did give me a few suppliers to check with though.

Anyone have any experience with these, I've seen a few threads on here, same as a firebird 500, 2 transformers that are prone to failure, 1x3 6lq6. Mine looks different than what I see doing a Google image search, silver face with woodgrain along the bottom. It seems to work fine, hi low has...

Thanks, I'll try that route, from what I've seen the original NEC part isn't made anymore, they do make the same part in a smaller package, and I've seen a 3 pin part suggested, but I'd rather go withe the original.

Pretty common problem, dead ic-151, mine has signal on the input, dead output. Does anyone know of a reputable source for the UPC1678G ? My usual sources, rf parts, mouser, digikey didn't have it. I don't like buying parts from ebay, 2 listings from 1 seller as of now.

I've been asked to look at this thing, looks like an old k1313. Klv250, rm italy mosfet amp. I'm a glorified tinkerer, tinkerist? I can solder and have some old test equipment, and some knowledge, but far from an expert, and not and amp guy, so please forgive any ignorance. I don't have much...

Thanks again for the replies, it's been a big help. I have a few projects coming up I might ask for a little guidance on. I'll start new threads for each of those though. A few tube amps and a rm that's been blown up a few times. I had thought about digging into that noisy switching power...

I think he's been setting it to 80

I'll have to take a closer look at the video, maybe I can get him to send it to me and share it if anyone would be interested. Another quick ?? As is I think it's ok running a low dk into it 2-3w and a pep of around 40 or so shouldn't hurt it, I wouldn't run a 100w+ radio into it. Would that be...

I think he's ok with the power, he's just upset about the price he paid to get it. $500 something foe the amp itself and some 100amp switching power supply the guy convinced him he needed to run it (but who doesn't need a good power supply). That's after he bought a Chinese 150amp switching...

Appreciate the replies nomad and Dave. The amp isn't mine, a friend of mine has it, and your replies are pretty much what I told him. I just wanted a little confirmation because I'm not familiar with the 421 hg parts, or obese young man amps. A quick goog and I saw the originals being 100w pep...

What would be expected out of a straight 4 pill amp running 4 hg mrf421 at 14.8v, builder suggested an 80w dead key from the amp and it should have a pep of around 800w running a stryker 955 into it.

Low audio and no forward swing, can be heard on a close receiver, mic gain makes a difference, variable power works, modulation vr in the radio does nothing, don't know if the limiter was removed, I can't find a schematic, and am new to the surface mount stuff with these radios, am regulator...

Anyone know where to find a schematic for this radio? I know there similar radios, but I haven't found anything specifically on the ept990013b board. Been out of the hobby for a few years and the forums I used back then seem dead. So, this is my first post here. The problem I'm trying to solve...