[SFDXA] Cable for K4FK

[Kai Siwiak]

Hi Norm,
I learned of the need only at the meeting.  So was that a yes? You will 
donate the cable?  It should be about 5 ft long.

No it is not advisable to make up your own cables with USB connectors.  
The cable itself must be constructed with the correct pairs twisted, and 
in the spec twist pitches. Otherwise we invite all kinds of RFI 
problems.  This one will be used at K4FK with up to 1500 W transmitted.  
I don't want to the the "we got lucky game" with RFI/EMC issues.

73
Kai

Norman Alexander wrote:
> Kai,
>
> Should have asked earlier.   A suggestion, I get all my similar cables 
> from Marlin P. Jones here in Lake Park.  You might find it a good idea 
> to go online check their catalog for cables and order a selection.  
> USB family of cables, RCA types, and a bunch of DB 9, 15 and 25 
> cables.  Also all kinds of jack adapters, mini to 1/4inch, 1/4in to 
> mini (1/8) and made up cables mini to mini stereo and such.  Also cat 
> 5 cables are available.  
>
> I have purchased a selection of these various cables in lengths from 
> 3ft, 6ft, 10/12ft up to 100ft long.  These cables are so cheap 
> (usually less then $3.00).  I find that even if they  do not have a 
> cable termination combination I need I buy a cable with one correct 
> connector and now I only have to assemble a connector to one end. Plus 
> I often have the makings of a second cable from the part I cut off 
> (plan ahead and buy it long enough for two cables.
>
> The also carry a broad range of DB connectors and all are very 
> inexpensive - less $1
>  
> Regards,
>
> Norm
>
>
> ------------------------------------------------------------------------
> *From:* Kai Siwiak <k.siwiak at ieee.org>
> *To:* aSFDXA <SFDXA at mailman.qth.net>
> *Sent:* Fri, March 9, 2012 12:08:14 PM
> *Subject:* [SFDXA] Cable for K4FK
>
> Can anyone donate a USB jumper cable for our club station K4FK?
>
> Specs:  USB 2.0/1.0 (i.e., 4 wires)
> Connector at computer end: USB Type "A"
> Connector at second end: USB Type "B"
> Ferrite RFI suppressor near the Type "B" USB connector.
> A clam-shell RFI suppressor would be a suitable alternative.
>
> Please see the Figure under "Physical appearance" in
> http://en.wikipedia.org/wiki/Universal_Serial_Bus
>
> Thanks! and 73
> Kai, KE4PT
>
>
>
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