Had to install a VSWR protection circuit to protect the 100 watt output transistor from greater than 10:1 reflection.
The comparator measures VSWR, trips an S/R flip-flop which then biases an NMOS that shorts out the bias supply varactor diode regulator circuit, thereby turning off the PA. A buzzer sounds to indicate VSWR fault.
To reset, the power must be cycled on the radio.
The comparator measures VSWR, trips an S/R flip-flop which then biases an NMOS that shorts out the bias supply varactor diode regulator circuit, thereby turning off the PA. A buzzer sounds to indicate VSWR fault.
To reset, the power must be cycled on the radio.
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