Speaking of noise... could you please start new threads for these interesting but unrelated topics?
I looked at the 2N3904 and 2N5769 data sheets. They have the same max Ic (200 ma). The 3904 data sheet shows "output capacitance 4 pf, input capacitance 8 pf" and the 5769 collector-base capacitance 4 pf. Sound about the same...
