Note
73, Feb 1982, p. 135.
The 229A is a 2000 watt antenna tuner/SWR bridge/power meter. The tuner uses a reversible "L" configuration with a silver-plated roller inductor, high-voltage variable capacitor, and selectable fixed capacitors for greater versatility in impedance matching. The design automatically provides a low Q minimum loss path when properly adjusted.
Power ratings are 2 kW PEP and 1 kW CW. Frequency range is 1.8-30 MHz. Model 229 matches conventional 50 ohm unbalanced outputs of transceivers or linear amplifiers to a variety of balanced or unbalanced load impedances. Antennas such as dipoles, inverted "V"s, long random wires, windoms, beams, rhombics, mobile whips, Zepps, Hertz, and similar types can be matched. A built-in balun converts one antenna to a balanced configuration if desired.
The built-in swr bridge and dual-range power meter indicates swr from 1:1 to 5:1 and power from 10 to 2000 Watts.
Front-panel controls are variable capacitor with spinner knob, roller inductor with spinner knob, 11-position bypass/hi-lo capacitor select switch, 4-position antenna selector switch, SWR sensitivity, forward/reverse switch, 2000/200 watt power range switch, and SWR/power meter switch.
The rear panel includes coax input connector, four coax antenna connectors, three thumb-screw-type connectors for single wire and balanced line, ground connector, and 12 VDC input for dial lighting power.
