An interlock to disable the MiniWhip's power supply was created out of 74 series logic and opto-isolators. When the K3 or the Flex transmits, a contact on the back of the MiniWhip's power supply is shorted, disabling DC injection. The LED on the MiniWhip's power supply turns yellow when another transmitter is transmitting. There was a mis-configuration when originally installed, where the K3 was injecting 12V into the MiniWhip's power supply rather than shorting the contact. Although the DC injection would be disabled, damage may have been occurring as the LED is considerably dimmer compared to it's sister device, a LNA.