Dr.EM
New Member
I'd like to choose some low noise transistors out of the ones I have for a particular application. I have some BC559C models and 2N3906, 2N4403 and BC177. I'm thinking the 559C and 3906s are the best candidates (both quote max 4dB). So, i'm looking for a way to test the respective noise levels between various transistors, same model and different, to select the lowest noise ones. I have a basic oscilloscope, op-amps, regulated supply and multimeter but no specialist/sensistive equiptment. Any suggestions appreciated.