We had this same issue with the S100 bus extender board. Might be worthwhile somebody putting together a list of MFG’s and the transistor orientation for these two common (and often used with our boards) transistor.
John From: [email protected] [mailto:[email protected]] On Behalf Of Don Caprio Sent: Monday, June 16, 2014 11:53 AM To: [email protected] Subject: Re: [N8VEM-S100:4222] Re: S-100 Bus Extender and S-100 Bus Terminator Boards Have Arrived I just checked the datasheets on Fairchild 2N3904 & 2N3906. Both TO-92 package have the same footprint and orientation for EBC. On Mon, Jun 16, 2014 at 11:06 AM, Don Caprio <[email protected]> wrote: O perfect. More 'variables'. Thanks for the heads up Tom. On Mon, Jun 16, 2014 at 11:01 AM, Tom Lafleur <[email protected]> wrote: Something to look at. Some vendors of 2n3906/04 and other small single transistors have different pin orientation for their parts in TO92 case. C and E are swaped. Look at the vendors data sheet for your part, not a generic one. ~~ _/) ~~~~ _/) ~~~~ _/) ~~~~ _/) ~~ Sent from my Phone On Jun 16, 2014, at 12:16 PM, Don Caprio <[email protected]> wrote: Rich, I don't know if version 2 of the backplane suffers from the same error. I'm not even sure what version of the board I have. However I'm pretty sure mine is wrong. A peek with a magnifine glass shows the square pad on Q1 is opposite of Q2. Looks like I have to swap the orientation of Q1. I have not tested the backplane yet. On Sun, Jun 15, 2014 at 4:49 PM, Richard Cini <[email protected]> wrote: Don — I have Version 02 of the 8-slot backplane (uncompleted) and Q1 has the same footprint error. Is the fix to put the transistor in opposite to the silkscreen? Rich -- Rich Cini Collector of Classic Computers Build Master and lead engineer, Altair32 Emulator http://www.classiccmp.org/cini http://www.classiccmp.org/altair32 From: Don Caprio <[email protected]> Reply-To: S100-Post <[email protected]> Date: Friday, June 13, 2014 at 3:16 PM To: S100-Post <[email protected]> Subject: Re: [N8VEM-S100:4159] Re: S-100 Bus Extender and S-100 Bus Terminator Boards Have Arrived I was looking at the S-100 18 slot backplane and saw notes on the incorrect footprint on transistor Q1. I have the 8 slot version and have no such notes on Q1. When I pull up the docs from the wiki I see that Q1 suffers from the same error. Can those of you that have the 8 slot board running confirm this board suffers from the same error? Are any 18 slots boards available? Thank you. <8slotQ1Q2.png> On 06/ 6/14 06:49 PM, Edward Snider wrote: Do you have me down for either of these Todd? I don't remember. Ed On Friday, June 6, 2014 9:12:46 AM UTC-5, Todd Goodman wrote: The S-100 Bus Extender and S-100 Bus Terminator boards have arrived. http://s100computers.com/My%20System%20Pages/Extender%20Board/Extender%20Board.htm http://s100computers.com/My%20System%20Pages/Terminator%20Board/Bus%20Terminator%20Board.htm Please let me know if you'd like any. The usual price of $20 each plus $5.95 shipping in the US. If you're outside the US then I'll let you know the actual postage once I have the package set up and weighed. If you ordered other boards and want them to ship together that's no problem either. Thank you! Todd -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- Don Caprio [email protected] -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- ------------------------------- Don Caprio [email protected] http://www.uxpro.com (925) 240-UNIX -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- ------------------------------- Don Caprio [email protected] http://www.uxpro.com (925) 240-UNIX -- ------------------------------- Don Caprio [email protected] http://www.uxpro.com (925) 240-UNIX -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. 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