Bird 43 Line Section. The Bird Model 43 Thruline Wattmeter was created in the early 1950s. Ive edited the image to show the 68 ohm terminating resistor feed-thru capacitor and calibration pot.
Its reference line section made it economical and provided built-in reference accuracy that remained consistent with age. Dual element line section. Worlds largest used calibrated BIRD RF Power measuring equipment dealer BIRD watt meter 43 series elements load termaline thruline tenuline wattmeters load resistor dummy load slugs sampler line section attenuator coaxial termination antenna analyzer BIRD wattmeter.
Has a PL259 on one end and a SO239 on the other.
Dual element line section. Watch the birds Fly to the finish line with a random winner each time. Each line section is equipped with one or two sockets where Plug-In Elements in the desired power and frequency range are inserted. 6975 - OEM Meter Replacement 30ua for the Bird 43 43P Thruline Wattmeters.