Electronic Stethoscope MODEL 3000 with Ambient Noise Reduction

modal3000The model 3000 features the latest SEPP OTL output circuit, using a Sansui developed drive transformer plus Mesa type silicon transistor 2SD45, providesThere was something missing; the Zanden Model 3000 preamplifier had been upgraded to Model 3000mk2 status, completing the full Classic of phono stage,