madbeanpedals::forum

Projects => General Questions => Requests => Topic started by: rullywowr on October 18, 2011, 07:02:42 AM

Title: Transistor testing board
Post by: rullywowr on October 18, 2011, 07:02:42 AM
Hello,

I was wondering if anyone knew of a etchable layout for a germanium testing rig?  Based on R.G. Keen's rig - this guy would have a socket for a transistor and the appropriate other sections.

What do you guys use for testing?

Title: Re: Transistor testing board
Post by: gtr2 on October 18, 2011, 11:50:50 AM
This....  ;D

http://www.peakelec.co.uk/acatalog/jz_dca55.html

Josh
Title: Re: Transistor testing board
Post by: rullywowr on October 18, 2011, 12:37:07 PM
$70!  Yikes!  That is fancy and all but I was thinking something that I could etch based on R.G. Keen's schematic here:

http://www.geofex.com/Article_Folders/ffselect.htm (http://www.geofex.com/Article_Folders/ffselect.htm)

Perhaps even with my mediocre Eagle skills, I can make something.
Title: Re: Transistor testing board
Post by: gtr2 on October 18, 2011, 01:04:48 PM
Certainly, but if you're doing a lot of trannies the dc55 is the way to go.  Much faster to get the gains and leakage.  Plus it gives you the pinouts.  Especially helpful on some stuff you cant find the datasheet on.
Title: Re: Transistor testing board
Post by: irmcdermott on October 18, 2011, 02:51:56 PM
Quote from: rullywowr on October 18, 2011, 12:37:07 PM
Perhaps even with my mediocre Eagle skills, I can make something.

Why not? That is a very small, doable circuit. It's doing those kinds of things that will sharpen your EAGLE skills. 2 resistors, a socket, a switch, a battery, and two pads for the DMM lines. Go for it!