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Antenna Tuner Model 228
Description
The Model 228 antenna tuner is an inductive/capacitive network used for matching unbalanced 50 - 75 ohm output impedances of transmitters and transceivers to a variety of loads, both balanced and unbalanced. It operates over a frequency range of 1.8 to 30 MHz. It has a built-in antenna select switch which permits bypassing the tuner or selection of three different antennas. Model 228 has a built-in SWR bridge and meter.
Specifications
- Circuit: T network
- RF Power: 200 watts, intermittent; 100 watts continuous
- Capacitor Voltage Rating: 1 KV
- Inductor: 47 taps, 18 gauge silver-plated wire on a 2" diameter core
- Input Impedance: 50 - 75 ohms, unbalanced