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Looking for a schemtic on an early version of the U87
Author: Bo HansÚn
Date: 09/23/2013
This is maybe the very first version of the U87.
PCB id is: U87-220-01 dated 21/3-67.
(serial number: 6490)

For me an odd unusual appearance at the circuit board, where FET transistor with its components is located on a separate small round pc-card just under the capsule base, and the rest of the components on the large pc-card.

Would be very grateful for a copy of this schematic.
Thanks in advance.

--Bo  
 
Reply
Bo HansÚn
09/23/2013
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09/24/2013
Bo HansÚn
09/24/2013
Klaus Heyne
09/25/2013
Uwe Sattler/NeumannUSA
09/25/2013
Bo HansÚn
09/25/2013
Uwe Sattler/NeumannUSA
09/25/2013
Klaus Heyne
09/25/2013
Martin Schneider/Neumann
09/25/2013
Klaus Heyne
09/25/2013
Bo HansÚn
09/25/2013
Martin Schneider/Neumann
09/25/2013
Klaus Heyne
09/26/2013
Bo HansÚn
09/29/2013