zachtheterrible
Active Member
I have a transmitter circuit that specifies using a 2n3904 transistor. the transmitter only transmits about 30 feet though. the funny thing is that on the package of the transistor, it says that it will have an approximate hfe of at least 200 . . . when i plug it in to my multimeter, it says that the hfe is only 20 or so. I've tested about 4 of the 2n3904 transistors, and they all say about the same. I know that I am reading it right because i tried a different transistor in my multimeter, and it had an hfe of 800. am I missing something, or should i just try a new transistor? any suggestions?
Oh yeah, one other thing, I tried putting two transistors in the same exact spot so at to double the gain. should this work? cuz it didnt.
Oh yeah, one other thing, I tried putting two transistors in the same exact spot so at to double the gain. should this work? cuz it didnt.