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All this time I had to help my Mom and Stepdad move to New Hampshire. Now that they're gone I can get back on the radio. I talked to a friend of my Dads and he and I met at my Dads shop. He told me it sounded like feedback, and he said to spray some contact cleaner in the volume control...
I am confused. It's not the first time so I'm kind of used to it. I was checking grounds to the chassis and everything was .8 meg ohms and climbing. So I checked from pins 7 and 8 at IC6 to the ground side of C172, and it was .6 ohms. Aren't all these grounds supposed to be to the chassis? Maybe...
I saw on the news it's only a cat 2. The closer to the coast the worse it'll be.
Is your tower easy to take down? If you do take it down, I would think you'd need to anchor it some place.
Those were the points I was testing with the capacitor. I also unplugged the frequency counter and still have the noise. I'm gonna end up scratchin' a hole in my head tryin' to figure this out. LOL
This is great, but what I've been looking for and really need is the board layout of the bottom of the circuit board. I've got a 16volt 1,000uF cap for testing and I think I got the right solder points. The points I tested I ended up getting the same squeal. I'm hoping I got the wrong solder...
I did that, bridged pins 2 and 3 and I still got the noise. With the mic disconnected there was nothing, which is right. So I'm sure the mic is wired correctly.
I already have. I thought I wrote that in the first post.
There might be two bad microphones. I doubt it but I'll give it a shot trying the jumper. Besides I'm learning more troubleshooting procedures and I do like learning things.
I'll try that hopefully tomorrow. I live a few miles from my Dad's house. And hopefully my wife doesn't have any projects to do here at our house. Thank you for the help! I'll let you know what happens.
So I couldn't find a 1,000 micro farad capacitor in my Dad's shop, so I ordered one. I had to order a pack of 5, but they ended up being about $3 a piece. I touched the leads on the other cap in the radio, and there was no change. Is there a board layout in the forum some where? I'd need it for...
Thank you! I did not know that about those capacitors. I didn't say anything in my post but I replaced the TA7222P audio power amplifier already. I figured that would be the most logical part, and it was only about $3. I'll look around in my Dad's shop and see if I can find a 1,000 micro farad...
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