My SB303 worked fine except for a moderate audio hum. So I recapped most of the electrolytics on the BFO and the Audio boards. Replaced some old out of spec resistors. Triple checked soldering for bridges and correct components. But every time I turn it on now it receives fine for about 30-40 sec than smoke comes from the Q511 & 512 and they are toast. Replaced them with NBE 184 & 185 .. and they smoked. I checked all voltages and they are all perfect. + and - 35 and 10 volts. I also did the ohm check from the book and some of the readings on these transistors were sky high. For example the 24K ohm is about 35K. I can't seem to find the problem.. Any body have any suggestions? I'm stumped.