For Sale: B&K 520B Transistor Tester. It tests transistors, FET's and SCR's and automatically
identidies the leads. It also tells you if the transistor is a NPN or PNP, if a FET is a N or P
channel and if the transistor is Silicon or Germanium. It is in nice condition and is working fine. It comes complete with AC power cord, test probes and the
manual on CD. $79 plus $15 for shipping to the lower 48 states.