X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Message-ID: <517E9994.8070708@buffalo.edu> Date: Mon, 29 Apr 2013 12:02:28 -0400 From: "Stephen R. Besch" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130329 Thunderbird/17.0.5 MIME-Version: 1.0 To: geda-user AT delorie DOT com Subject: Re: [geda-user] no footprint = no netlist? References: <201304291547 DOT r3TFlHeh025882 AT envy DOT delorie DOT com> In-Reply-To: <201304291547.r3TFlHeh025882@envy.delorie.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-PM-EL-Spam-Prob: X: 10% Reply-To: geda-user AT delorie DOT com On 04/29/2013 11:47 AM, DJ Delorie wrote: > The solution is to make each "via" you're wiring to, a separate > one-pin symbol in gschem. Give them all different refdes's (don't end > in a lower case letter though ;) but the appropriate pin number, and > you can place them wherever you want but they still count as > "connected" in gnetlist. > > Note: this means in your schematic you'll need to have N different > one-pin symbols, modified for the appropriate pin numbers, at/near > your tube symbol. > > Here is at least on other alternative solution. Simply make a footprint with the number of pins required by the tube. Tou can arrange these in a circular pattern to match the tube socket layout(1), or, as suggested above, just a linear array (probably better if the tube is some distance away). You can then mount the socket anywhere you like - above or below the PCB, even placing a large hole in the center of the footprint for the tube itself to go through. You still have the soldering issue though. I suspect that you want the tubes acoustically isolated to prevent issues from microphonics. You might consider using the small pin-sockets available from MillMax (have a look at these: 0677-0-15-15-30-27-xx). You can get them from Digikey (ED90103-ND) in unit quantities. Once mounted on the PCB, just push wire loops from the tube sockets into them. I have used this technique to mount Flash tube trigger transformers as well as small daughter cards on a PCB. 1) Getting a circular pattern may be a bit tricky. I'm not sure if PCB has a built in algorithm for circular pin arrays. If not, simply calculate the positions based on a unit circle centered around the footprints (0,0) point. -- fictio cedit veritati