====== Antenna Tuner Model 228 ======
{{228.jpg?150|}}{{228rear.jpg?150|}}

===== 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.  Same as Model [[227]] but with the addition of the SWR bridge/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