Differences

This shows you the differences between two versions of the page.

--- 227 [2007/02/13 20:28]
n5na created
+++ 227 [2008/05/13 23:35] (current)
n5na
@@ Line 3: / Line 3: @@
 ===== Description =====
-Matches 50 ohm unbalanced output to variety of balanced or unbalanced antenna impedances.  46-tap inductor allows vernier adjustment.  200 watts intermittant, 100 watts continuous.
+The Model 227 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.  Same as Model [[228]] but without 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

Trace: