My audio on my TK-790, ONLY IN SCAN MODE, the speaker has a background hissing sound. When it stops on an active channel it is loud and clear. When i plug my antenna into the antenna jack the hissing gets louder. i put a noise filter (ground loop isolator) on the speaker cable and the hissing has stopped but now the audio is so low you can barely hear it. Take the noise filter off and and the audio is back loud and clear but the hissing is also back.
thanks
TK-790 hissing speaker
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asmitty0010
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spectragod
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Re: TK-790 hissing speaker
Just curious, have you tried a Kenwood board, they may be more familiar with the issue being is how that is their radio of choice.asmitty0010 wrote:My audio on my TK-790, ONLY IN SCAN MODE, the speaker has a background hissing sound. When it stops on an active channel it is loud and clear. When i plug my antenna into the antenna jack the hissing gets louder. i put a noise filter (ground loop isolator) on the speaker cable and the hissing has stopped but now the audio is so low you can barely hear it. Take the noise filter off and and the audio is back loud and clear but the hissing is also back.
thanks
Kilgore: Smell that? You smell that?
Lance: What?
Kilgore: Napalm, son. Nothing in the world smells like that.
Kilgore: I love the smell of napalm in the morning. You know, one time we had a hill bombed, for 12 hours. When it was all over, I walked up. We didn't find one of 'em, not one stinkin' dink body. The smell, you know that gasoline smell, the whole hill. Smelled like... victory. Someday this war's gonna end...
____________
Revelation 6:8
Lance: What?
Kilgore: Napalm, son. Nothing in the world smells like that.
Kilgore: I love the smell of napalm in the morning. You know, one time we had a hill bombed, for 12 hours. When it was all over, I walked up. We didn't find one of 'em, not one stinkin' dink body. The smell, you know that gasoline smell, the whole hill. Smelled like... victory. Someday this war's gonna end...
____________
Revelation 6:8
Re: TK-790 hissing speaker
Without having a schematic to look at, I would guess a mute gate is not clamping the audio to the PA well enough during scan to fully eliminate the normal squelch noise on an unbusy channel. This may be normal. I would have to hear how loud the residual sound is. The advise to talk with other Kenwood users is your best first step.