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PA2AGA > HDDIG 18.08.00 23:39l 194 Lines 6908 Bytes #999 (0) @ EU
BID : HD_2000_224D
Read: GUEST
Subj: HamDigitalDigest 2000/224D
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Sent: 000818/2148Z @:PI8HGL.#ZH1.NLD.EU #:5716 [Den Haag] FBB $:HD_2000_224D
From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Fri, 18 Aug 00 20:22:42 MET
Message-Id: <hd_2000_224D>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
have a portable radio and TNC that I can take the top of mountains when I
hike. Here are the two setups I am considering:
#1: Yaesu VX-5R Tri-band HT with a Katronics KPC-3
#2: Kenwood TH-D7A (TNC built-in)
I need a simple setup that does not weigh too much or draw too much power.
If you have opinions on the options above or an alternate option, I would
appreciate the advice.
John
------------------------------
Date: Thu, 17 Aug 2000 20:25:14 -0700
From: "Jim Grosswon" <grosswon@hotmail.com>
Subject: Portable - TNC / Radio
Hi Hugh,
I would like to use this portable rig for packet radio and APRS. I have a
couple of handheld PDAs (HP200LX,...) that I could use as a terminal.
John - KG6CVG
"KF6HHS" <hrbcrb@aol.com.goaway> wrote in message
news:20000817034613.01536.00000175@ng-fy1.aol.com...
> Hello John
>
> You did not mention what/why use of the TNC. Are you going to use it for
> packet, APRS, or? There may be some options depending on your intended
use and
> may reduce the size/weight of the radio/TNC you need to pack.
>
> Regards, Hugh KF6HHS
> Retired, now life moves at my pace.
> please note spam filter
------------------------------
Date: Thu, 17 Aug 2000 08:13:18 -0700
From: "Jim Grosswon" <grosswon@hotmail.com>
Subject: Portable - TNC / Radio
Hi Hugh,
I intend to use it for both packet and APRS. I have a number of small
handheld PDAs (HP LX200,...) that I can use as a terminal. Recently, I
purchased a Garmin GPS that I could hook to it and use it for APRS.
John, KG6CVG
"KF6HHS" <hrbcrb@aol.com.goaway> wrote in message
news:20000817034613.01536.00000175@ng-fy1.aol.com...
> Hello John
>
> You did not mention what/why use of the TNC. Are you going to use it for
> packet, APRS, or? There may be some options depending on your intended
use and
> may reduce the size/weight of the radio/TNC you need to pack.
>
> Regards, Hugh KF6HHS
> Retired, now life moves at my pace.
> please note spam filter
------------------------------
Date: Thu, 17 Aug 2000 15:18:03 +1200
From: "Gerard Welford" <gerard.welford@xtra.co.nz>
Subject: PSK31 reception killed by RFI from PC...
Gary Danaher wrote in message <3999FD4C.ED03A694@home.com>...
>Make sure it is the pc and not the monitor. My experience says that the
problem
>is in the monitor. Turn it off and see what happens.
>
>Steve Kallal wrote:
>
When ever I turn the desktop PC
>> on, my receiver on 20 meters get several S units of noise covering all
but
>> the strongest signals. When I disconnect the antenna the noise
disappears
>> completely. The rig is around the room from the computer, about 6 to 8
feet
>> or so. The antenna is located on the my apartment balcony at least 15 to
20
>> feet away.>
>> Does anyone have any suggestions? I am open to ideas.
>>
>> Steve Kallal KB9XU
>> skallal@pacbell.net
I too suffer from horrendous QRM from my Pentium and no, it is not the
monitor. I have tried grounding the computer case, winding the leads through
toroids and if I throw it out the window then bang goes my chances of
operating. The QRM seems to be on set frequencies so I am forced to avoid
those spots.
If anybody has got any suggestions I will be eternally grateful.
73 Gerry ZL1AWW
------------------------------
Date: Thu, 17 Aug 2000 07:43:33 GMT
From: nomail@rob.knoware.nl (Rob Janssen)
Subject: PSK31 reception killed by RFI from PC...
Gerard Welford <gerard.welford@xtra.co.nz> wrote:
>I too suffer from horrendous QRM from my Pentium and no, it is not the
>monitor. I have tried grounding the computer case, winding the leads through
>toroids and if I throw it out the window then bang goes my chances of
>operating. The QRM seems to be on set frequencies so I am forced to avoid
>those spots.
>If anybody has got any suggestions I will be eternally grateful.
This can be extremely difficult to tackle, as you could be the victim of a
bad motherboard design. First try to disconnect as many leads from the PC
as practically possible (start out with only the mains lead) and see if
there still is that much QRM.
When there is, there may be hope. You apparently have a leaky (plastic?)
case, and should just discard it and build everything into a decent case
with metal shielding all around, and fingerstock that interconnects the
case plates (very important! a "slot"-formed gap in your case makes all
other shielding effort worthless, so watch out for slots along the lid)
When the QRM disappears by disconnecting the cables, it is apparently
radiated by the cables. When your cables already are shielded, and you
already tried the toroids, just discard or sell the machine. It will be
too difficult to make any improvements.
Rob
--
+----------------------------------+--------------------------------------+
| Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
| AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
+----------------------------------+--------------------------------------+
------------------------------
Date: Thu, 17 Aug 2000 20:39:42 GMT
From: "Gilbert Baron" <gbaron@home.com>
Subject: PSK31 reception killed by RFI from PC...
You could buy one designed for the NASA, they are so well shielded that you
cannot detect them, of course, it may cost a bit, and it may take a bit of
espionage, but hey, worth it no?
"Rob Janssen" <nomail@rob.knoware.nl> wrote in message
news:slrn8pn5t4.fi4.nomail@linux.pe1chl.ampr.org...
> Gerard Welford <gerard.welford@xtra.co.nz> wrote:
>
> >I too suffer from horrendous QRM from my Pentium and no, it is not the
> >monitor. I have tried grounding the computer case, winding the leads
through
> >toroids and if I throw it out the window then bang goes my chances of
> >operating. The QRM seems to be on set frequencies so I am forced to avoid
> >those spots.
> >If anybody has got any suggestions I will be eternally grateful.
>
> This can be extremely difficult to tackle, as you could be the victim of a
> bad motherboard design. First try to disconnect as many leads from the PC
> as practically possible (start out with only the mains lead) and see if
> there still is that much QRM.
>
> When there is, there may be hope. You apparently have a leaky (plastic?)
> case, and should just discard it and build everything into a decent case
> with metal shielding all around, and fingerstock that interconnects the
> case plates (very important! a "slot"-formed gap in your case makes all
> other shielding effort worthless, so watch out for slots along the lid)
>
> When the QRM disappears by disconnecting the cables, it is apparently
> radiated by the cables. When your cables already are shielded, and you
To be continued in digest: hd_2000_224E
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