Ge leakage probs,... me think?

[formerMember1]

recieved two transistors from small bear.
One is a OC44,(black) for a RM.
when i test the true gain using geofx site i get this:
first value i get is 156.6mv then when i touch 2.2m resistor to base i get .903   i minus and get 155.697   That doesn't seem right at all since i still have to times it by 100 yet.  Which would mean i have a tran with hfe of 15569.7  :shock:

i know how to measure transistors for true gain. i have done so many many times with the right results. but for some reason this happens whenever i test the OC44. :cry:

the main thing that is throwing me for a loop is getting a 156.6mv reading at beginning of test!! :twisted:

anybody run into these probs before?

the other transistor i test from small bear(japan one) tests fine with a approx hfe of 73

thanks


PS: could it be my battery is only 8.93V

using this same battery other transistors test fine though.

[petemoore]

Arent the Q's you recieved from SB already gain and leakage tested? Did they come with resistor bias values?

[formerMember1]

yeah but that is the odd part,
i got two different transistors off him, both are said to be biased at 56k and 3.9 k.  If they each have a different hfe then how can they both be biased with the same values

But i was just wondering what hfe they were(he didn't specify) so when i did the measurement that  was the reason for my posting this thread.

i happen to measure both transistors when they got here because i was wondering the hfe.  i ran into the same problem with the OC44 transistor when i go it, when i ran into that trouble i tried finding the answer online but couldn't.  so i eventually forgot about it untill now, when i built RM pedal, and was wondering what the hfe was that made the pedal have the certain sound it does.  The other transistor i got off him(japan) tested and works fine.  
the transistor can't be damaged by me since i use sockets and it measured that way when i recieved it a week before i even used it in any circuit.(i didn't recieve rest of parts off mouser until a week or so later)

Can this be why the pedal is so ear piercing like i posted in other threads.  It seems to bias okay, And the other tran(japan) works and test fine.  it sounds good but not how i wish it was.
thanks for the reply    

i do notice a difference in sound sometimes.
Like one day i like it and an hour later i wont.
somedays it sounds great and i am very happy with it then later or the next day it seems it lost that "magic".  :roll:

[formerMember1]

sorry guys, smallbear fixed the problem for me. it was my mistake.

here when i bought two transistors off him, he sent them both with the same hfe rating so i could swap them without rebiasing so i could here the difference.  they were 73 hfe.

that money for those transistors was WELL SPENT!!!

WOW what a guy