[Lowfer] Computer noise

Mon, 14 Jan 2002 17:34:18 EST

In a message dated 1/14/02 5:15:16 PM Eastern Standard Time, 
[email protected] writes:

<< Random thoughts:

 1. Does moving the computer cabling around make any difference?>>

I havent tryed that yet.

 <<2. Does unplugging the sound card connection to the receiver help? This
 might indicate that some common-mode RF choking in that audio cable would be
 the solution.>>

I'm using a mic connected to the sound card and the mic is next to the 
speaker of the radio....but I havent noticed any change when I bring the mic 
next to the radio.

 <<3. Does turning the monitor off help? I sometimes had to do that during
 "Hifer" operation last summer. It's a pain, but if you are dealing with
 QRSS60 and screen captures, it may not be such a big deal. Another thought
 for the financially gifted (whoops, forgot that you're in broadcasting...)
 would be an LCD monitor. They don't generate the big E and H fields that the
 CRT monitors do.>>

Turning the monitor off doesnt help. Seems like we might be dealing with a 
noisey power supply.

 <<4. If the computer is networked, does pulling the network cable help? You
 might be able to do without it for the duration.>>

No networking of computers yet...so thats not a worry at the moment.

 <<5. Describe your antenna setup.>>

The only antenna I have up is a G5RV which does bring in a decent number of 
stations.The antenna is located 100 away from the computer and is up in the 
air around 60 feet. BTW...the house does have a tin roof....so some degree of 
shielding so to speak and the computer is plugged into the same electrical 
branch  that all of the other radio equipment is plugged into.

 <<John Andrews, W1TAG
  >>

Bob Carter
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