P3 Artifacts

[Jim-5]

Any guidance on the artifacts I am seeing with the P3?

I have the problem that has been discussed in detail.  When I tune to certain frequencies, I will get a "blip" on the screen that is 5-6 dB above the noise and I have the classic artifact that is ~3 kHz wide and 4-5 dB above the noise floor, that is just below the tuned frequency.  I have the ribbon cable dressed to the LHS of the chassis and the coax on the RHS (when looking at the P3 display).

I have tried 31 material chokes on the coax with no apparent change.

Did I miss a solution that was published before?

If so, I am sorry for the use of the bandwidth.  If someone could direct me to the specific post, I would appreciate it.

Tnx

Jim
WA9ZBV
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[Don Wilhelm-4]

Jim,

Have you tried re-dressing the ribbon cable routing inside the P3? That
is an important item.  Check the P3 assembly manual to make certain the
cables are routed in the proper manner.

73,
Don W3FPR

On 12/6/2013 1:57 PM, Jim wrote:
> Any guidance on the artifacts I am seeing with the P3?
>
> I have the problem that has been discussed in detail.  When I tune to certain frequencies, I will get a "blip" on the screen that is 5-6 dB above the noise and I have the classic artifact that is ~3 kHz wide and 4-5 dB above the noise floor, that is just below the tuned frequency.  I have the ribbon cable dressed to the LHS of the chassis and the coax on the RHS (when looking at the P3 display).
>
>

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[Jim-5]

Yes, the ribbon cable is routed in the
proper manner per Elecraft
recomendations.

Jim
WA9ZBV


----- Original Message -----
From: "Don Wilhelm"
<[hidden email]>
To: "Jim" <[hidden email]>;
<[hidden email]>
Sent: Friday, December 06, 2013 4:24 PM
Subject: Re: [Elecraft] P3 Artifacts

> Jim,
>
> Have you tried re-dressing the ribbon
> cable routing inside the P3? That is
> an important item.  Check the P3
> assembly manual to make certain the
> cables are routed in the proper
> manner.
>
> 73,
> Don W3FPR
>
> On 12/6/2013 1:57 PM, Jim wrote:
>> Any guidance on the artifacts I am
>> seeing with the P3?
>>
>> I have the problem that has been
>> discussed in detail.  When I tune to
>> certain frequencies, I will get a
>> "blip" on the screen that is 5-6 dB
>> above the noise and I have the
>> classic artifact that is ~3 kHz wide
>> and 4-5 dB above the noise floor,
>> that is just below the tuned
>> frequency.  I have the ribbon cable
>> dressed to the LHS of the chassis and
>> the coax on the RHS (when looking at
>> the P3 display).
>>
>>
>

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