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228 [2008/05/13 23:30] n5na |
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| 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. | 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 | ||
| + | ***Output:** Matches most loads, balanced and unbalanced. Maximum balanced load 1.8 to 4.0 MHz is 500 ohms. | ||
| + | ***Frequency Range:** 1.8 to 30 MHz | ||
| + | ***Finish:** Painted front and rear panel; black textured sides and top | ||
