Robot Model 70 Sstv Monitor

High Sensitive Tuner Schematic

The signal diode on the indicator input point A of the schematic diagram should Fig, 2. Tuning indicator displays. The no-signal state is shown in A. B shows presence of a steady L2 kHz signal C is a 15 Hz flickering to indicate thaf the SYNC signal is in tune. be connected to the high side of the SYNC gain control R1 of the MacDonald circuit . High voltage for the indicator is taken from the same voltage as that supplied for the I2AX7 limiter. With a 1200 Hz test signal connected to the input...