Transistor matching tester....help needed

[peth]

I have tried a number of different new transistors transistor tester 2.jpg the diagram is in the bedini manual

[peth]

P2150001.jpgP2150001.jpg previous was wrong pic

[guyzzemf]

iv never built that. it looks straight fwd ck a few transistor with d meter ck ur build/ then with a good transistor ck build
be sure u build it exactly as it is ,use cheap transistors
do u need to match gain for a multi transistors build ,if u havent built a single transistors [1 power 1 trigger] ssg yet [u should ]
if u just need to ck trane use dmm


https://www.youtube.com/watch?v=JLXKffm7VF4

https://www.youtube.com/watch?v=BgT9-VRf1Cw

[peth]

I began to experiment substuting resistors instead of the pot and found if I had a resistance of 19k the meter would give a reading of about 40ma if I went a couple of thousand ohms each way needle of the meter droped way back to very little. seems to be a narrow sweet spot.
Ian

[guyzzemf]

IAN
There are many diy transistor testers out there with instructions ,or for sale cheap
i have no experience with transistor matching . but i hear you will go through a lot of transistors to get a few that match
guy