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Yep, that's right. One of the first things I did was to look up the mic wiring. It's got a 4 pin plug in it wired like a cobra

Yep! I changed the air tho just to be sure

All over it. Poked, prodded and warmed most of the joints up. I still get zero sound out of the speakers

The audio chip was my first place to look. My 4300 connex acted the same way but in e I replaced it, the noise came back. No such luck here. Replaced the on off switch thinking it may be bad too. Been messing with it on and off for a few days.

That's a good lookin 200 ya got there. Looks like you won't need that little thing laying around. I'll send ya my shipping info!

just bought a superstar 360 at a flea mkt. had noise toys and talk back module and a bent swr knob, but no volume on rx. Meaning no sound comes out of the speaker. I assume it's receiving, the needle moves with on air traffic. No sound with internal speaker or extension spk. Any ideas would be...

just an update on the radio. i replaced the two transistors on the power supply board and my voltage dropped back to 14.87 volts. was the able to use the trimmer to bring it back to 13.8. i went ahead and replaced the smaller 945 transistor as well as the 2200uf cap on the board. i had already...

Just looked and the data sheet says an HFE of 40 is usual. And I'm measuring 4 volts more on the collector at idle than the data sheet says. Ugh

Yeah that's right. I've pulled them out and so far all of them test good albeit lowish gain. They are TIP 35's. haven't looked them up to see what the HFE is on them. I'm assuming low, it's high 90's on most all of them.

Just bought a Boomer power supply and amp at a yard sale. I know, nothing is for sure in a yard sale. Get it home, slide the top cover out to see what transistors are in the amp. Power ed it up and smoke rolled from one of the big caps in the back. Shut it off, ordered caps to replace them. Put...

It's a cherry radio. The covers and face plates are in great shape. No hacking or adding crap like echo or noise toys has been done to it. It probably has been screwdrivered in the past. The rx isn't quite what I had heard it was so I'm guessing the IF cans have been tweaked. Certainly doesn't...

Yeah I love mine. The tubes are seriously weak in mine but still grunts out 280+ pep. And bad loud. Have it behind a president Dwight D. Yeah the 750, had a guy give it to me. It's been butchered. The hood has been cut on and pieced together. It's schetchy for sure underneath. It's all but dead...

It measured 18.9 volts at that point, LC. I've ordered new regulators as well as diodes for that board. It will sit on the shelf until those get here next week

Don't know why that first response is in there, supposed to have been deleted. I might also add, the VR for the internal voltage, will measure 9 volts on two of its legs

Well, it may not be the right way but, I can measure voltage at the fuse and get about 22 volts. I can go from there and get 19-22 volts on the board that the internal supply goes to. The 4 I can measure voltage at the fuse and it's 22.3v. On the board inside that the transformer feeds, I get...

Yep, the PA works as well as everything on the radio with an external 13.8v supply. Except the clock. Over the air, all the locals say it sounds great.

It's on the plug in supply now. Last night I was listening in on the local channel and everything was fine with it. I went to another channel and checked my key and pep and all was fine. Turn it on a minute ago and my rx is gone. Well I say gone, but thru the speaker I can hear everything. But...

No, it shows 13.84- 14.2. It varies from idle to key up.

I meant to add that my rx was diminished because of some bad solder joints under those relays you were talking about @nomadradio. I touched those up and have rx with or without the pre amp again. And how do you send pm's here?? I've looked and don't see how to do it other than a conversation...

Finished re-capping, still have a 10 watt key and 28 pep. Picked up some audio according to meters. On the internal supply I have those numbers. I also have a motor boat sound in my rx and the transmit light stays on. On the 13.8 plug in, those problems go away. Of course my numbers go down. 5...