Hi All,
First of all THANKS to all those of you that replied with ideas and suggestions.
I have had a chance over the past couple of days to get into the computer and
determined a few funnies.
1. When I removed the case lid and then replaced it I found the noise level had
increases, so there is a bad ground between the two.
2. I placed a filter/conditioner in the mains supply, this improved the amount
of noise and would be acceptable to use now, but there was still a small amount
present.
3. I tried out my new(ish) laptop, an ASUS Core-2 CPU and found that there was
no noise (if there was it was very low). However I like to run the 3 big
monitors and monitor everything.
4. The monitors are not the cause of the noise, as I tested these by cycling
them on/off.
Now that I have determined some things I might get it running on-air this
weekend.
BTW, I have noticed that 7080 down in the South Pacific is mainly voice, have
not heard too much digital. Might be able to sneak some WINMOR in. Will list
when I am ready and on air.
Now back to the computer (desktop) and see if I can improve on it.
Regards
Kevin, ZL1KFM.
----- Original Message -----
From: Siegfried Jackstien
To: digitalradio@yahoogroups.com
Sent: Friday, September 25, 2009 4:38 AM
Subject: AW: [digitalradio] I Hate Computers and Radio!!!! Interference.
Hello kevin
Is your hamshack and computer on the same power outlet??
Try to use another outlet (maybe from next room with a long cable) :.
Has the noise gone or become lower ???
You can try to put a filter between the pc and the power outlet in the wall:.
Can be built for a few bucks
3 caps : a bifilar wound coil and a resistor is all you need :.
If you are not a homebrewer these filters can be bought in almost any
electronic store :.
There are several on the market :.. (from 1A ═1phase to 60A 3phase)
Try out the ps of your other pc :. You said it has lower power but for just
trying out you can disconnect 2 of your 3 hd╢s
And you can also unplug your cd-rom and/or floppydisk cause you don╢t need
this for testing your rf noise problems
If the noise is gone you have to talk with your wife (for the new ps) : grin
:.
I use a laptop for all my hamware :. The power that the pc needs is lower on
a laptop/notebook
They are optimized in the power consumtion for longer battery life :. Lower
currents = lower noise
The laptop has almost no internal wiring inside (just a few short cables) :.
No wires = no noise from them
But surely changing your pc is not the solution you are looking for
:.═══════════════════════════════════════
Is the noise received in your antenna? (disconnect the antenna to check) :
I have a very very light noise from my notebook ps (just s1-s2 with preamp on)
If I move the ps around a bit I can find a place where the noise is almost
gone :.
So try out if changing the ps helps or build a inline filter :: that╢s the
best I can tell about your problem
Good luck in finding a solution for your rf noise
Cu on the bands
Best 73╢s de dg9bfc
Sigi
