Cobra 148 gtl SSB Audio Flutter Malaysia Model

[Probate]

Hi All,

Any ideas on why I'm getting garble sound on sub when audio its turned up?

Regards

 

[sp5it]

Post sample audio please.

 

[9C1Driver]

What’s the history of the radio as in any mods tunes or final swaps? How are you powering it? If it has a tiny power cord you might be starving it.

 

[nomadradio]

Garble on receive audio?

Or transmit audio?

73

 

[KneeBiter]

Hi All,

Any ideas on why I'm getting garble sound on sub when audio its turned up?

Regards

Try this. Worked for me in the past on TX ssb warble. Not sure if you have tx or rx warble but you should do this anyway.

 

[Smokinone]

Try this. Worked for me in the past on TX ssb warble. Not sure if you have tx or rx warble but you should do this anyway.

That's what I did to mine also, and the information I have on that issue also adds a capacitor. I don't remember where I found that but it was in my 148GTL notes.

"Cut trace on PC board between Pin 1 of IC6 and pin 2 of IC4 ( MB3756 ). Next, install a .1uf mylar capacitor at C136 and a jumper wire at J44. This corrects distortion on the SSB transmit audio"

 

[BC Coyote]

If it's transmit warble check you're getting enough voltage/amperage to the radio !
Fastest way to make a sideband radio warble and garble on transmit is to starve it for power.........
Messing with the bias of the drivers/finals can also turn sideband transmit audio to crap.
If it's receive audio that's the problem it could be a bad speaker or audio chip.
Just my 2 cents worth. As SP5IT said, an audio sample would be super helpful !

 

[Probate]

Try this. Worked for me in the past on TX ssb warble. Not sure if you have tx or rx warble but you should do this anyway.

Thanks! This was extremely helpful and worked!

 

[doffo]

Thanks! This was extremely helpful and worked!

Awesome to know it worked for ya. Great feeling when a radio is fixed.