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DaveEbelII

Member
Jul 4, 2023
22
16
13
Glendive Montana
I have a 6300 f 150 with excellent receive , good dead key ( 3 watts lo , 15 hi ) and it shows forward swing with the Roger beep on .. but no audio output.. tried a couple different mics for sh¡ts and giggles no luck..
 

Start with the basics, even if it seems stupid. Do you get audio out of the PA speaker in PA mode?

If yes, then you know the mics are wired right for that radio and the audio chain works all the way up to the audio amp.

If no, then break it down a little more. Are the mics wired for that radio? Is the mic gain cranked all the way down? If there's an echo board in the radio is it working correctly or can it even be bypassed to check?

If you've got a scope or a signal tracer you can probe around a bit and see where the audio signal disappears. Any where you see signal on one side of a component and not on the other is a good place to start looking. Cracked or cold solder joint or a bad component could cause the problem you're describing.

From the fact you're seeing what looks like Roger beep audio I'd guess your audio chain is probably OK from at least where the beep tone enters it.

Here's the only service manual I could find that even looks close:


Sorry if that's not the right one.
 
Start with the basics, even if it seems stupid. Do you get audio out of the PA speaker in PA mode?

If yes, then you know the mics are wired right for that radio and the audio chain works all the way up to the audio amp.

If no, then break it down a little more. Are the mics wired for that radio? Is the mic gain cranked all the way down? If there's an echo board in the radio is it working correctly or can it even be bypassed to check?

If you've got a scope or a signal tracer you can probe around a bit and see where the audio signal disappears. Any where you see signal on one side of a component and not on the other is a good place to start looking. Cracked or cold solder joint or a bad component could cause the problem you're describing.

From the fact you're seeing what looks like Roger beep audio I'd guess your audio chain is probably OK from at least where the beep tone enters it.

Here's the only service manual I could find that even looks close:


Sorry if that's not the right one.
Yeah the mics are both properly wired one is the stock mic it came with .. both checked out fine on the mic tester for audio tx and rx .. yes it has echo from the factory.. and no key up at all on PA mode .
 
My first response to a "no modulation" issue in a radio with echo is to bypass the echo board. This was easy to do on the older Galaxy-type radios. The echo board had two 3-pin sockets with 1/10-inch pin spacing. Unplug them from the echo board and insert three pins long enough to connect the two sockets directly to each other. If I'm remembering this radio correctly, it has a digital echo inside a sheet-metal shield, and uses 2mm header pins. They're skinnier and closer together than the pins older analog echo boards used.

That's where I would start, by finding three pieces of bare wire the right diameter to jump those two 3-pin sockets one to the other.

73
 
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My first response to a "no modulation" issue in a radio with echo is to bypass the echo board. This was easy to do on the older Galaxy-type radios. The echo board had two 3-pin sockets with 1/10-inch pin spacing. Unplug them from the echo board and insert three pins long enough to connect the two sockets directly to each other. If I'm remembering this radio correctly, it has a digital echo inside a sheet-metal shield, and uses 2mm header pins. They're skinnier and closer together than the pins older analog echo boards used.

That's where I would start, by finding three pieces of bare wire the right diameter to jump those two 3-pin sockets one to the other.

73
Scrap from a cap or resistor should work perfectly for that .. thanks for the info sir i appreciate your input..
 

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