Connex 4300 300 issues

[Barcode]

I have a 4300 300 and it works great for about 15 to 30 mins after that every time I key up it has a static sound in the background almost like a wind noise you can still hear me on it but it sounds bad

 

[144inBama]

Does it do it on both power levels or just 1? How old is the radio, any mods?

 

[Eldorado828]

You've got another thread in here where others are trying to help you.

Connex 4300 300 issue please help

I have a Connex 4300 300 radio It works fine for about 15 to 30 minutes and then it gains a static sound Almost like you’re riding in a vehicle with the windows down in the background when I key up it only does it after it warms up or is on for 15 to 30 minutes I’ve spent a ton of money on this...

www.worldwidedx.com

 

[MadisonMod]

I have a 4300 300 and it works great for about 15 to 30 mins after that every time I key up it has a static sound in the background almost like a wind noise you can still hear me on it but it sounds bad

I just bought a 4300-300 . When I plugged it in and started talking on low, (50) watts it was okay. As I turned the power up it started to oscilat and squeal. I was going to call the guy I bought it from but I check the mic and screwed on tight. The noise went away. I have it set keying about 90 and swinging to 250. Is that about correct for the 4300-300? Maybe this weekend I can put it in the truck

 

[Eldorado828]

I just bought a 4300-300 . When I plugged it in and started talking on low, (50) watts it was okay. As I turned the power up it started to oscilat and squeal. I was going to call the guy I bought it from but I check the mic and screwed on tight. The noise went away. I have it set keying about 90 and swinging to 250. Is that about correct for the 4300-300? Maybe this weekend I can put it in the truck

First of all, welcome to the forum!

I don't believe that was oscillating but instead just a bad mic connection. 250 on what power supply and voltage, meter into a dummy load?
Going mobile do yourself a favor and and run good heavy wire, quality coax and best antenna system you can do or it won't last long.

 

[MadisonMod]

I tried unit on the bench with an original road king trucker noise canceling mic. Plugged into 10 amp solid state power supply. Plugged into dumyload

Yes. 4 Gage wire with 30 amp protection fuse. Anderson connectors. 15,000 Browning br92 antenna grounded . Supper mini 8 . The plan is to install into my truck this weekend.

 

[nomadradio]

Be VERY sure the antenna's SWR is low first. That radio won't tolerate much SWR. I also suggest wiggling the coax back and forth behind each connector while watching the reflected side of the SWR meter. Things come loose on a motor vehicle, and you want to stay ahead of this kind of fault. Much cheaper than having a high-power radio find it for you by blowing up when you key the mike.

73

 

[MadisonMod]

Be VERY sure the antenna's SWR is low first. That radio won't tolerate much SWR. I also suggest wiggling the coax back and forth behind each connector while watching the reflected side of the SWR meter. Things come loose on a motor vehicle, and you want to stay ahead of this kind of fault. Much cheaper than having a high-power radio find it for you by blowing up when you key the mike.

73

Yes sir will do. I just finished install. New browning antenna and super mini 8. I ran 4 gage fused power cables with Anderson connectors. Grounded the system. I just powered the unit on and checked swr = 1.5 receive sounds nice and clean. Don't know anyone close to here, but I will try talking skip eventually. Thanks for the advice

 

[Eldorado828]

Nice!
Too bad those rigs weren't made with ssb or you'd be getting out all over the world.