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Atron Compu 2000

Atron Compu 2000

The Atron Compu 2000 is a rather vintage scanner, that can be easily equipped with a discriminator output. This scanner uses a TA7130 FM IC. The baseband audio can be found on pin 7.

Compu 2000
If you follow the trace from pin 7, you will find a resistor and capacitor connected to pin 7. You can follow the next steps to make a discriminator output:
  • Connect a 10 k resistor to the resistor on the circuit board
  • Connect a 2.2 nF capacitor to the other lead of the 10 k resistor
  • Connect the capacitor's other lead to ground, e.g. to the metal housing of the coil nearby
  • Mount a 3.5 mm chasis socket in the back plane of the scanner
  • Connect the chassis socket to the junction of the 10 k resistor and the 2.2 nF capacitor using a small strand of isolated wire. Because of the metal back plane of the scanner, there is no need for a separate ground connection
Location of pin 7
Connection to the IC
Follow the trace from pin 7
The compontents for the discriminator output

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