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	Thu, 28 Apr 2016 23:01:29 -0700 (PDT)
Date:	Fri, 29 Apr 2016 08:01:28 +0200
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] modifying the width of a group of tracks in pcb
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> I designed a board with some 50 ohm microstrip tracks, whose widths (13.5mil) were chosen for a particular board house.  I now need to use a different board house, with a different dielectric and prepreg thickness, and so will need to change the widths of all of my 50ohm tracks.
> 
> Many tracks in my layout are also 13.5 mil wide even though they are not meant to be controlled impedance runs.  I’d like to leave these alone and only modify the width of the 50ohm runs. For future boards, I’ll definitely only use the 50ohm trace width for 50ohm traces, in which case a straight sed search/replace will do what I need.  But in the meantime, any recommendations for doing a batch modification of the trace width of a group of selected traces?  
> 
> Thank you,
> James

Another options would be to modify pcb so you can do the change. I guess trace width are an attribute and with gschem style attribute editing it would be possible to change them all at once.

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