Audio Amplifiers without Pin One Grounding issue for us with the K3

[Robert Nobis - N7RJN]

I also use my K3 to listen to SW broadcasts and am looking for an audio
amplifier that is immune to RFI and does not have the pin one grounding
issue for the input/output connectors. I prefer something in the range of
10 to 25-watts of power to drive my speakers. Does anyone have any
recommendations?

Thank you and 73,


Bob - N7RJN


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[Jim Brown-10]

On 1/10/2014 6:59 PM, Robert Nobis wrote:
> I also use my K3 to listen to SW broadcasts and am looking for an audio
> amplifier that is immune to RFI and does not have the pin one grounding
> issue for the input/output connectors. I prefer something in the range of
> 10 to 25-watts of power to drive my speakers. Does anyone have any
> recommendations?

I wish I had better news, but most consumer products have "the pin one
problem." It's also common for RF to be coupled on loudspeaker wiring.
The RF side of this can be solved with ferrite chokes on cables
connected to vulnerable equipment.  Twisted pair loudspeaker wiring also
helps that part of the problem.

73, Jim K9YC
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[Robert Nobis - N7RJN]

Jim,

Thank you. That is precisely why I have asked the question. What I am
trying to find out is are there really any products that do not have the
pin one problem?

73,


Bob - N7RJN

On 1/10/14, 8:51 PM, "Jim Brown" <[hidden email]> wrote:

>On 1/10/2014 6:59 PM, Robert Nobis wrote:
>> I also use my K3 to listen to SW broadcasts and am looking for an audio
>> amplifier that is immune to RFI and does not have the pin one grounding
>> issue for the input/output connectors. I prefer something in the range
>>of
>> 10 to 25-watts of power to drive my speakers. Does anyone have any
>> recommendations?
>
>I wish I had better news, but most consumer products have "the pin one
>problem." It's also common for RF to be coupled on loudspeaker wiring.
>The RF side of this can be solved with ferrite chokes on cables
>connected to vulnerable equipment.  Twisted pair loudspeaker wiring also
>helps that part of the problem.
>
>73, Jim K9YC
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:[hidden email]
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>

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