How Testing Transitors (AC128) GAIN without hFE ???

[mathflan]

hi!

i have a multimeter but without transistor gain meter so no Hfe.
Can I test transistor gain with a circuit or everything else???

thanks

[petemoore]

I've never built it
 theres a FF Q picking tester at GEO, 'picking transistors for FF' or something like that...read, scroll, read, can't beat the info...links at top of page, click around...
 I just buy matched set[s from SB, [I got a range of Leakage tested GeQ's, Hfe's like 69 - 180Hfe...so I could try them].
 Otherwise just using my FF board, and the Hfe [no leak check on it...] meter on my DMM to find good sounding ones.
 I suppose it's time to try the FF Ge transistor testing unit...

[cd]

http://geofex.com/Article_Folders/ffselect.htm

[Paul Marossy]

The GEO method is a very good way to determine the Hfe of Ge transistors. Works great for me!  

[mathflan]

thanks you guys!!
it's a great method!!