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I have a Sharp Mobilon and it works great with my TH-D7a. I am using a
homemade cable that is attached to the Mobilon cable. The mobilon cable
does have a torroid coil nearest the HPC.
Hope this helps,
Walter
Steve Meserve wrote:
>
> I had the idea to use a Windows CE unit (Compaq h/w) as the terminal for my
> mini packet station, the Kenwood TH-D7A. This creates a very small but
> powerful packet station with one slight problem. Since the real (pg-4w)
> cables from Kenwood are not yet available (I'm told they are backordered), I
> used the 3/32" 3 conductor plug with 4ft of wire provided in the box by
> Kenwood, and added a DB9 to the other end. While the data connectivity works
> flawlessly, the RF situation couldn't be worse. As soon as I bring the cable
> (connected to a running CE) close to the D7A, RF hash appears. If the cable
> is actually plugged into the radio, all but the strongest signal are
> obliterated. I've tried another CE unit, an HP 660, and get the same
> results.
>
> Has anyone else tackled this problem? Does the Kenwood cable (the pg-4w, if
> you can find one in stock) fix the problem? My guess is to use a torriod and
> wrap the cable around it, but I don't know how to calculate the
> torriod/windings to create a choke to cleanup this RFI. Any info is
> appreciated. 73's
>
> Steve
> K1YZ
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>.
------------------------------
Date: Wed, 14 Apr 1999 14:21:20 -0400
From: "Curt M. Breneman" <brenec@rpi.edu>
Subject: TH-D7A packet using a Windows CE
Steve Meserve wrote:
>
> I had the idea to use a Windows CE unit (Compaq h/w) as the terminal for my
> mini packet station, the Kenwood TH-D7A. This creates a very small but
> powerful packet station with one slight problem. Since the real (pg-4w)
> cables from Kenwood are not yet available (I'm told they are backordered), I
> used the 3/32" 3 conductor plug with 4ft of wire provided in the box by
> Kenwood, and added a DB9 to the other end. While the data connectivity works
> flawlessly, the RF situation couldn't be worse. As soon as I bring the cable
> (connected to a running CE) close to the D7A, RF hash appears. If the cable
> is actually plugged into the radio, all but the strongest signal are
> obliterated. I've tried another CE unit, an HP 660, and get the same
> results.
>
> Has anyone else tackled this problem? Does the Kenwood cable (the pg-4w, if
> you can find one in stock) fix the problem? My guess is to use a torriod and
> wrap the cable around it, but I don't know how to calculate the
> torriod/windings to create a choke to cleanup this RFI. Any info is
> appreciated. 73's
>
> Steve
> K1YZ
Steve,
I think that a single large piece of ferrite would do the trick with
only one pass through it. Look at how the power supply and other cables
from many laptop computers have those characteristic parasitic lumps on
them. I think that's what you need.
Curt Breneman
KC2EBP
>.
------------------------------
Date: Wed, 14 Apr 1999 21:21:28 GMT
From: Jeff Johns <jeffj@scott.net>
Subject: TH-D7A packet using a Windows CE
On Wed, 14 Apr 1999 16:40:48 -0400, "Steve Meserve" <stevenme@microsoft.com>
wrote:
> In addition to the Compaq I have an HP 660LX, and it exhibits the same RFI
> problem.
My 200LX (I love this little machine) has no problems with high levels of
RFI.
73 es gl Jeff W4JEF
*--------- Jeff Johns W4JEF - AMSAT# 32615 - QRP-L# 1857 ----------*
|jeffj@scott.net w4jef@amsat.org | Reserve Patrol Captain |
| Satellite: Mir R0MIR-1, AO-27 | Jefferson County Sheriff's Dept|
|200LX+BayPac+FT50=Portable Packet| QTH Birmingham, AL USA |
*------------------------------------------------------------------*
>.
------------------------------
Date: Wed, 14 Apr 1999 16:40:48 -0400
From: "Steve Meserve" <stevenme@microsoft.com>
Subject: TH-D7A packet using a Windows CE
In addition to the Compaq I have an HP 660LX, and it exhibits the same RFI
problem.
Steve
Jeff Johns <jeffj@scott.net> wrote in message
news:437972682673818NEWS2LX@NEWS.SCOTT.NET...
> On Wed, 14 Apr 1999 09:30:54 -0400, "Steve Meserve"
<stevenme@microsoft.com> wrote:
>
> > Has anyone else tackled this problem?
>
> Get a HP200LX!
>
> 73 Jeff W4JEF
>
> *--------- Jeff Johns W4JEF - AMSAT# 32615 - QRP-L# 1857 ----------*
> |jeffj@scott.net w4jef@amsat.org | Reserve Patrol Captain |
> | Satellite: Mir R0MIR-1, AO-27 | Jefferson County Sheriff's Dept|
> |200LX+BayPac+FT50=Portable Packet| QTH Birmingham, AL USA |
> *------------------------------------------------------------------*
>
>.
------------------------------
End of Packet-Radio Digest V99 #83
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