During the cqww fone in October a new computer placed in the shack only
hours before the contest gave us terrible 80m hash.( Okay, I know dont
add anything new before a contest!) We replaced the computer the second
night and worked what most worked the first night.
After reading several comments about computer RFI here I took the PS
apart and found exactly as described. There were four capicators and
two toroids clearly marked on the circuit board that were not there!
The toroids were replaced by two jumpers. I added .1 caps and rolled a
couple toroids on what I had in the shack. Just turned the computer on
and absolutely no hash at all. The manufacturer must have saved at
least fifty cents by leaving out the parts!! Hope this helps someone
else cure some computer RFI. Look to the PS first!
73,Bud, K4ISV
>From andriusi@siauliai.omnitel.net (Andrius Ignotas) Sun Jan 26 23:47:48 1997
From: andriusi@siauliai.omnitel.net (Andrius Ignotas) (Andrius Ignotas)
Subject: CQWW160CW
Message-ID: <199701262347.XAA11886@pikuolis.omnitel.net>
looking for any contest club who need my 0.5M points of CQWW160CW test!!!!!
>From slazar19@sgi.net (Spike Lazar) Sun Jan 26 22:30:14 1997
From: slazar19@sgi.net (Spike Lazar) (Spike Lazar)
Subject: Spike's mouth
Message-ID: <199701262230.RAA13812@orion.bv.sgi.net>
dr. Bafoofnik responds:
Dear k0pp@mcimail.com & Dan KL7Y,
My comments shall follow the reposts of your comments, anyone who
may be offended and possibly yourselves, should not read any
further.
k0pp@mcimail.com, posted:
>Spike, you chose to make your comments to just a few individuals very
>public ... appears that you want to in someway hold them up to public
>ridicule, so I'll do the same with you. Most will agree with me and
>take satisfaction in what I have to say.
>
>Your message content demonstrates that you already don't care what others
>think of you, but I still gotta tell ya ... your foul "mouth" isn't welcome
>here ... you've only demonstrated how little "class" you have.
>
>Your comments were directed to only a few ... why offend others? Guess
>you're like a dog ... gotta leave your smell at every available spot.
>
>k0pp@mcimail.com
>
>
>Dan KL7Y, posted:
>
>Let's see, we have guys who make up phony radio clubs to get special vanity
>calls. We have those who do tricks with addresses to get a special vanity
>call. Now we have guys with CB handles assessing the situation.
>
>Dr. Buffoon-ick, go P1SS up a R0PE. There's a couple calls you missed.
>
>Thank God there's a contest this weekend to purge this looniness from our
>minds.
>
> Dan KL7Y
Dear k0pp@mcimail.com & Dan KL7Y,
Yes, it has been known that I'm the Wil Rodgers of dogs, I never met
a spot I didn't like, including yours or even a pile of Dan's rope!
By the tone of your posts, I can scents both of you are highly
urinated and I'm sure your power supply is about to blow,
because your rectumfiers are getting over heated!
The evidence of your postings are only circumcisional and I suggest
you protect your "members" at all times, because otherwise both
of you may surely lightened up!
Without any further a doo doo, ...I make my leave!
Sincerely,
dr. Bafoofnik (Doktor of Bafoonery)
p.s., Yes, Didn't get my KL7 mult this weekend!
>From andriusi@siauliai.omnitel.net (Andrius Ignotas) Mon Jan 27 01:05:39 1997
From: andriusi@siauliai.omnitel.net (Andrius Ignotas) (Andrius Ignotas)
Subject: contest
Message-ID: <199701270105.BAA08456@pikuolis.omnitel.net>
hi all!
tnx for calling me in CQWW160CW TEST
cndx was realy bad 1st night and much
better on second!only 2 new countries:
VQ9SS and KC6VW no any more. will see
you guys on CQWW160SSB TEST!!!!!!!
please call me again!!!
73!ANDY LY2BTA (one of LY2ZZ gang)
>From k3mm@erols.com (Tyler G Stewart ) Sun Jan 26 23:10:50 1997
From: k3mm@erols.com (Tyler G Stewart ) (Tyler G Stewart )
Subject: computer noise- more
Message-ID: <199701262311.SAA32192@mx03.erols.com>
I have a feeling this is going to be an epidemic. I finally got around to
doing surgery on my new computer that had the awful noises on 160.
IT HAS NO AC LINE FILTER AT ALL>>>NO MISSING COMPONENTS...there just arent
any!
I purchase a replacement AC line jack with built in filtering and almost all
noise is now gone.
>From rumours I've been hearing, the third world is now dumping their RFI
garbage in the US, since the European community has adopted tough new
standards against this crap. Probably the only way to guard against this is
to insist on a high-quality, class B approved power supply in you new case.
Buying a brand name computer is probably a good guarantee as well.
At any rate, I think it was W0UN who passed along the advice on the line
filtering.
Thanks a bunch.
BTW, I believe it's actually noise from the motherboard backfeeding thru the
power supply and out onto the house wiring, which makes an excellent 160
meter antenna!
I bought my filtered jack from Mouser Electronics for about 5.50. However,
it required a lot of surgery to the PS case to install. Most people will
want to order one with the terminals on the back of the jack...not coming out
the side. (just a hint)
I also added a couple of large ferrite split beads to the power supply DC
lines and switch line. Dont know if that did any good, but I had them laying
around, soo....
73, Tyler K3MM
----------
> From: Bud <k4isv@westky.com>
> To: cq-contest@tgv.com
> Subject: computer noise- more
>
> During the cqww fone in October a new computer placed in the shack only
> hours before the contest gave us terrible 80m hash.( Okay, I know dont
> add anything new before a contest!) We replaced the computer the second
> night and worked what most worked the first night.
>
> After reading several comments about computer RFI here I took the PS
> apart and found exactly as described. There were four capicators and
> two toroids clearly marked on the circuit board that were not there!
> The toroids were replaced by two jumpers. I added .1 caps and rolled a
> couple toroids on what I had in the shack. Just turned the computer on
> and absolutely no hash at all. The manufacturer must have saved at
> least fifty cents by leaving out the parts!! Hope this helps someone
> else cure some computer RFI. Look to the PS first!
> 73,Bud, K4ISV
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