[Top] [All Lists]

[CQ-Contest] Laptop and RFI

To: "cq-contest@contesting.com" <cq-contest@contesting.com>
Subject: [CQ-Contest] Laptop and RFI
From: Barry <w2up3@verizon.net>
Date: Sun, 16 Dec 2007 21:10:55 +0000
List-post: <mailto:cq-contest@contesting.com>
Hi all,
Sorry, but this is not about cheating :.)

When setting up for the 10m contest, I discovered RF is getting into my 
laptop/keying line when running power.  I'm using a Dell laptop with 2 
USB to COM adapters - one for the radio and one for CW.  As I increase 
power above 200W, the CW starts to slur, then goes solid keydown.  As I 
lower the power it comes back without skipping a beat.  I tried 
disconnecting everything going in and out of the laptop except the CW 
serial port and no change.  I tried some ferrites on the cable and no 
difference.  I've never had any RF problems before (but used a desktop 
computer in the past), everything is well-grounded, and the antenna is 
about 200 ft from the shack.  It's fine on all other bands running full 
power.  Any ideas?
Barry W2UP


Barry Kutner, W2UP             Newtown, PA   

CQ-Contest mailing list

<Prev in Thread] Current Thread [Next in Thread>
  • [CQ-Contest] Laptop and RFI, Barry <=