Advertisement
REMOTE TTL CONTROL
If you have a TTL logic "high" available during the transmit time of your repeater, you can
use the circuit shown in Figure 1.
2N2222 OR GENERIC NPN TRANSISTOR
Figure 1
Note: This circuit will key the amplifier when a positive voltage between 2 and 15 volts is
applied to the TTL input terminal.
If you have a logic line which is controllable remotely, you can remotely activate the
MIRAGE amp. A NAND gate tied both to your repeater COR and the remote control line
would engage the amp on transmit when your remote control line was at the correct level.
Advertisement
