Hi,
Although there is no post in that topic since a little while, I figured that it wouldn't any harm to add one.
I recently acquired this kit in a flea market where the person was selling electronic parts and boards, mainly for parts. Some of the boards were intact, some of them had a rough journey ! For a box of may 30 boards or so, I ended up paying $20, which wasn't bad a all.
Anyhow, despite my efforts to understand what may be wrong, the calculated gain with the scope trace is always higher than the ones I obtain with my DCA55 for instance. I have a transistor tester, a DMM and the DCA55 that give me similar values, within a margin of 20 or so, but the curve tracer is close to 100 more,
For instance, I tried with 3 2N2222 and the figures were roughly the same, in the 230-250 range using my "regular" testers. The curve tracer gave me values in the 350 range. I can understand that the current used to evaluate the gain isn't the same, but having values so different from each other, make me wonder if I missed something.
By the way, I found some RCA jacks that fits perfectly on the board, footprint wise. I bought them on eBay, "Audio Video AV 2 RCA Female Jack Socket Chassis PCB Mount Connectors 5 Pcs", item #321695325968. The ones that were suggested earlier in this thread, didn't have the same footprint.
Bye for now.