Line In/Out Isolation Transformer

I want to run sound card audio to the K3. I see that the K3 has isolation transformers built into the Line In and Line Out jacks. My audio cables have an isolation transformer that I built in for use with other radios and applications.  Does it hurt to have the audio going through two 1:1 isolators or should I just use a plain audio cable?

Thanks,
Bill K3SV


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[W2xj]

No, it doesn’t hurt.

Sent from my iPad

> On Jun 3, 2020, at 6:11 PM, Bill Gillenwater <[hidden email]> wrote:
>
> I want to run sound card audio to the K3. I see that the K3 has isolation transformers built into the Line In and Line Out jacks. My audio cables have an isolation transformer that I built in for use with other radios and applications.  Does it hurt to have the audio going through two 1:1 isolators or should I just use a plain audio cable?
>
> Thanks,
> Bill K3SV
>
>
> Sent from my iPad
> ______________________________________________________________
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[Joe Subich, W4TV-4]

> Does it hurt to have the audio going through two 1:1 isolators or
> should I just use a plain audio cable?

There is a minimum level of distortion in a transformer.  I would
use simple audio cables and avoid the additional transformer(s) -
particularly since the KIO3/KIO3B interfaces use high quality
transformers to minimize the distortion.

73,

    ... Joe, W4TV


On 2020-06-03 6:10 PM, Bill Gillenwater wrote:
> I want to run sound card audio to the K3. I see that the K3 has isolation transformers built into the Line In and Line Out jacks. My audio cables have an isolation transformer that I built in for use with other radios and applications.  Does it hurt to have the audio going through two 1:1 isolators or should I just use a plain audio cable?
>
> Thanks,
> Bill K3SV
>
>


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[Jim Brown-10]

On 6/3/2020 3:10 PM, Bill Gillenwater wrote:
> Does it hurt to have the audio going through two 1:1 isolators or should I just use a plain audio cable?

If you've practiced the power and bonding recommended in my tutorial on
the topic, you don't need ANY transformers, not even the ones in the K3.

http://k9yc.com/GroundingAndAudio.pdf

73, Jim K9YC
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