====== Antenna Tuner / SWR Bridge Model 277 ======
{{277.jpg?150|}}{{277rear.jpg?150|}}

===== Description =====
Same as Model [[247]] plus a built-in SWR bridge and meter that shows ratios up to 5:1.  Matches 50-75 ohm unbalanced outputs from transmitter to a variety of balanced or unbalanced antenna impedances.  Antennas such as dipoles, inverted "V"s, long random wires, Windoms, beams, rhombics, mobile whips, Zepp, Hertz and similar types can be matched from 1.8 to 30 MHz.  Popular universal Transmatch circuit with one kV capacitor spacing and 46-tap silver plated inductor (pat. pending) allows vernier adjustment up to 200 watts, rf, continuous duty.

===== Reviews =====
  *[[http://www.arrl.org/members-only/prodrev/pdf/pr8004.pdf|QST, 1980, April]] (Must be an ARRL member and logged in to view.)

===== Specifications =====
**Same as Model [[247]] except:**

  ***SWR Bridge:** Metered readings to 5:1 ratios.
  ***Finish:** Gray chassis and front panel; black textured sides and top.
  ***Size:** 3.5" x 10.25" x 6.5".
  ***Weight:** 3 lbs.