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John, Engineer and electronic enthusiast for more than 12 years.
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After trying to add an equalyzer thru the rear port on my

Customer Question

after trying to add an equalyzer thru the rear port on my Yasue ft1000 the cat system wll not work anymore, also the audio monitor will not work and it has a terrible whine in the audio every 8000khzapprox>.
Submitted: 8 months ago.
Category: Consumer Electronics
Expert:  Russell H. replied 8 months ago.

Hi, thank you for contacting My name is Russell. I will do my best to provide the right answer to your question.

Is the whine in the audio continuous? or is it intermittent, or dependent on circumstances?

Customer: replied 8 months ago.
audio noise depends on the frequency. on some frequencies there is no whine noise and the receive audio is clear, also no noises on transmit.
Expert:  Russell H. replied 8 months ago.

Such whine in audio is usually from feedback.

Is there any way this could be caused by feedback?

Customer: replied 8 months ago.
I would not think it is feedback as i am only in the receive mode.
Expert:  Russell H. replied 8 months ago.

Such high-pitched whines or howls or squeakings, in audio systems, are usually caused by feedback of some sort.

What microphone has input to the system?

Classic feedback is produced by a microphone picking up audio output from the same system the microphone feeds into.

Is there any such thing involved here?

What equalizer did you add to the Yasue FT1000 ?

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