[Elecraft] [K3] Noise from P3

[John Lemay]

Interesting !

I'll try some more ferrite tomorrow .........

John

-----Original Message-----
From: David Pratt [mailto:david at g4dmp.fsnet.co.uk] 
Sent: 23 March 2011 21:31
To: Ken Roberson; John Lemay
Cc: elecraft at mailman.qth.net; jim at audiosystemsgroup.com
Subject: Re: [Elecraft] [K3] Noise from P3

*** Thank you to everyone for their kind help. ***

I am pleased to report that putting a ferrite 'clamp-on' core at each 
end of the 12V power lead has completely cured the problem.  Because the 
cable is quite thin, I managed to wind two turns round each core.

I wonder whether a screened power cable might have been an alternative 
answer?  Maybe I shall try that tomorrow.

Incidentally, before fitting the cores I did notice that placing a 
finger near the screen did increase the noise.

73 de David G4DMP
-- 
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  | David M Pratt, Kippax, Leeds.   |
  | Website: http://www.g4dmp.co.uk |
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