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K3 deaf on 10 meters

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Smith Bradford

K3 deaf on 10 meters

Hello list,

My K3, serial number 3953, hears only the strongest signals on 10
meters. I observe that the noise floor displayed on the P3 is around
-140 db. Switching the antenna in and out does not change this reading.
On the lower bands I see a noise floor change. It's like the antenna
isn't being attached. The transmitter works on 10 meters with an 1:1
swr. The pre amp moves the noise floor as I expected.

Any suggestions?

W9HAK
Smith Bradford
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Don Wilhelm-4

Re: K3 deaf on 10 meters

Do you have the correct antenna selected (this is a per band setting)?
Do you have the RX ant selected?
There is a little feedthrough under those conditions, but only strong
signals will be heard.

73,
Don W3FPR

On 11/15/2011 2:06 PM, W9HAK wrote:

> Hello list,
>
> My K3, serial number 3953, hears only the strongest signals on 10
> meters. I observe that the noise floor displayed on the P3 is around
> -140 db. Switching the antenna in and out does not change this reading.
> On the lower bands I see a noise floor change. It's like the antenna
> isn't being attached. The transmitter works on 10 meters with an 1:1
> swr. The pre amp moves the noise floor as I expected.
>
> Any suggestions?
>
> W9HAK
> Smith Bradford
> ______________________________________________________________
> 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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Smith Bradford

Re: K3 deaf on 10 meters

Thanks for all the correct answers, I selected the
rx antenna on 10 meters and all is well. Still
learning about my K3.

Thanks all,

W9HAK
Smith Bradford

Don Wilhelm wrote:

> Do you have the correct antenna selected (this is a per band setting)?
> Do you have the RX ant selected?
> There is a little feedthrough under those conditions, but only strong
> signals will be heard.
>
> 73,
> Don W3FPR
>
> On 11/15/2011 2:06 PM, W9HAK wrote:
>> Hello list,
>>
>> My K3, serial number 3953, hears only the strongest signals on 10
>> meters. I observe that the noise floor displayed on the P3 is around
>> -140 db. Switching the antenna in and out does not change this reading.
>> On the lower bands I see a noise floor change. It's like the antenna
>> isn't being attached. The transmitter works on 10 meters with an 1:1
>> swr. The pre amp moves the noise floor as I expected.
>>
>> Any suggestions?
>>
>> W9HAK
>> Smith Bradford
>> ______________________________________________________________
>> 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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