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Photos 5

Repair 3

  Development Board for Vacuum Controller with USB interface, switch navigation and programming interface.

First prototype of Vacuum Controller - slider control on right, keypad, LED status lights and LCD backlit display

Inside view of Vacuum Controller

  No circuit boards for the vacuum controller shown here.

   Musicianís mixer as audio test equipment: Preamp -10db to +40db, THDistortion .005%, S/N: 100db, cost effective, frequency range 20Hz to 20kHz, 5 inputs, 2 outputs, high impedance, shielded cables, oscilloscope and computer interface possible. 
   Plus, this mixer is useful in providing crystal clear audio in making a fpv video or low budget movie; perhaps even research into lightning, echo location or passive sonar. 

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