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EB2DVY > PSK31 24.07.99 06:48l 125 Lines 4044 Bytes #-9957 (0) @ WW.SYD.NSW.
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Subj: PSK31 Digest V1 #119
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From: EB2DVY@EA2URV.EABI.ESP.EU
To : PSK31@WW.SYD.NSW.AUS.OC
De: Psk31 Digest <owner-psk31@aintel.bi.ehu.es>
Para: <psk31-digest@aintel.bi.ehu.es>
Asunto: Psk31 Digest V1 #119
Fecha: jueves 22 de julio de 1999 7:29
Psk31 Digest Thursday, July 22 1999 Volume 01 : Number 119
In this issue:
[psk31] PSK31 connection
Re: [psk31] PSK Overdrive
[psk31] Re: Hellschrieber Software (alternate URL)
[psk31] QSL info UA3BX, CU2AHD, DL4MHC, DL2BQV
See the end of the digest for information about psk31-digest
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Date: Tue, 20 Jul 1999 21:23:38 -0500
From: Elaine and Ronald Waxman <erwax@interaccess.com>
Subject: [psk31] PSK31 connection
Attached is a bitmap file with a crude schematic showing
proper isolation technique for connection of a PC and XCVR.
This is a crude and general representation. The specifics
need to be determined.
If this confuses anyone I apologize. The .BMP file should be
readable by everyone. I hope!
Ron de W9KNB
Forget it the files 276 K and I don't want to send it
------------------------------
Date: Wed, 21 Jul 1999 00:18:25 -0400
From: "Robert Lay" <w9dmk@crosslink.net>
Subject: Re: [psk31] PSK Overdrive
Dear Bill,
>I have a RF problem in my cables. It is only on frequencies around 3.2mhz
>(Mars freq). When I transmit running 50 to 100 watts IT really blasts my
>speakers. I don't have to be operating PSK31, it does it regardless of what
>the computer is doing, it only has to be on and the speaker power is on or
>off.
The problem that you describe probably has little to do with the speakers or the
way your PC interconnects with the rig - other than the fact that there is an
interconnection.
First of all - to prove the point, all you should have to do is operate the same
PC somewhere else in the house when you are operating in your normal way on 3.2
MHz and you will probably see that the problem is gone.
The problem is more likely due to the fact that there is a problem in the
Antenna/Feedline/Ground system such that the chassis of the rig is at elevated
RF potential. You can cure this in one of two ways - 1) eliminate the real
cause, or 2) cool off the rig chassis with an artificial ground. There are at
least two different commercially available Artificial Ground devices - one by
MFJ and the other by TenTec. I have used the TenTec, and I know that it works.
Eliminating the real cause can be much more difficult to diagnose remotely -
especially without any particulars on the configuration of your
antenna/feedline/ground system.
Based on the reasonable assumption that you have a simple dipole with coax
feedline coming directly into the shack and connecting to a tuner or the
transceiver, your solution will perhaps be the addition of a choke balun at the
top end of the feedline and the addition of a good earth ground of the coax
shield at a point just before it enters the house.
Good Luck,
73 de Bob Lay, W9DMK, King George, VA
http://www.qsl.net/w9dmk
http://www.fortunecity.com/meltingpot/albania/784
------------------------------
Date: Wed, 21 Jul 1999 09:22:47 +1
From: "Aldo Marchetto" <a.marchetto@iii.to.cnr.it>
Subject: [psk31] Re: Hellschrieber Software (alternate URL)
If you (as me) cannot open the URL
http://ninopo.freeweb.org
you can try
http://www.freeweb.org/varie/ninopo/
73. Aldo IZ1ANT
------------------------------
Date: Wed, 21 Jul 1999 09:31:18 +1
From: "Aldo Marchetto" <a.marchetto@iii.to.cnr.it>
Subject: [psk31] QSL info UA3BX, CU2AHD, DL4MHC, DL2BQV
Sorry for the bandwitdh.
I was so excited of the firsts PSK31 QSO's that I forgot to ask them
for their adress.
Does any of you can send me them?
Dr. Aldo Marchetto
C.N.R. Istituto Italiano di Idrobiologia
Largo Vittorio Tonolli 50
I-28922 Verbania Pallanza (VB) - Italy
Voice: +39 0323 518357
Fax: +39 0323 556513
E-mail: a.marchetto@iii.to.cnr.it
http: www.iii.to.cnr.it
------------------------------
End of Psk31 Digest V1 #119
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