One of the best tools I've purchased in a while is the Peak / Atlas Semiconductor. I have the DCA75 which has USB capabilities and can do some limited curve tracing, but the less expensive DCA55 (about $75) is also very capable. Widely available on E**y.
It lets you blindly connect up the leads, then identifies B/C/E hFE etc.
It's saved my tail more than once!
"The usual disclaimer", I have no relationship with the company etc.
- Gary
On Monday, June 16, 2014 2:06:18 PM UTC-4, don caprio wrote:
O perfect. More 'variables'.
Thanks for the heads up Tom.
On Mon, Jun 16, 2014 at 11:01 AM, Tom Lafleur
<laf...@lafleur.us> 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.
~~ _/) ~~~~ _/) ~~~~ _/) ~~~~ _/) ~~
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.
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
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.
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 n8vem-s100+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
--
Don Caprio
ilv...@gmail.com
--
------------------------------
-
Don Caprio cap...@uxpro.com
http://www.uxpro.com
(925) 240-UNIX