Broadcast & Communications Engineering and Maintenance Services
WQNR-FM HT-5FM Transmitter Load Tuning Mechanism Repairs, Replacement of Front Panel Circuit Breakers, and Telephone Wiring Repairs – September 27, 2021
During recent work and tuning on the WQNR-FM Harris HT5FM transmitter, the factory installed U-joint which links the front panel “Load” adjustment control to a linkage rod broke. I had to purchase an aftermarket replacement U-joint, bore it out to 1/4″, and install it in the transmitter. I also replaced three front panel circuit breakers which had become “flaky” with age, which is a common problem. I also had to make a quick run to a machine shop to get a custom linkage rod fabricated, which you will see and is explained in the photos below. The recent lightning strike damage had burned-out the telephone line wiring coming into the building and damaged the telco interface box on the outside of the building, so I finished up the repairs on the phone wiring during this same on-site work.