Macsot MR-700 High Quality wireless microphone

This is collected by the Macsot MR-700 wireless microphone system launch of the circuit for maintenance reference. High Quality Audio on receiver output.

Active components:
  • Microphone or Audio Preamplifier with IC MC4458
  • Dynamic Audio processed with one NE571 From Philips
  • Frequency Oscillator generated by one crystal 20.05 MHz and Varactor diode 2CB11A. No drift frequency is guaranted.
  • 9V DC power supply or battery. Source: High Quality wireless microphone

MC1374 TV RF Modulator

The MC1374 includes an FM audio modulator, sound carrier oscillator, RF oscillator, and RF dual input modulator. It is designed to generate a TV signal from audio and video inputs. This TV RF modulator based MC1374 IC from Motorola with wide dynamic range and low distortion audio make it particularly well suited for applications such as video tape recorders, video disc players, TV games and subscription decoders.

The IC features:
* Single Supply, 5.0 V to 12 V
* Channel 3 or 4 Operation
* Variable Gain TV RF Modulator
* Wide Dynamic Range
* Low Intermodulation Distortion
* Positive or Negative Sync
* Low Audio Distortion
* Few External Components