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73 Review by A diss Thompson W 7XU

Maxcom Antenna Tuner

Maxcom, Inc 1309 5th Cl. Ft. Lauderdale FL 33312 Price Class: 200D $599 XLD-150 $299

Maxcom Antenna Tuner

You've seen the ads: "One antenna 100 kHz to 200 MHz . absolutely no tuning ..VSWR 1.5:1 or less.11 Perhaps you've seen I he reviews thai have appeared elsewhere, which have ranged from me critical (Hal Is "Product Review." November 1964 GST) to the enthusiastic (Gordon West's "Maritime Mobile' column, December 1983 Woridradio).

So which is it?" you might ask. "Do the Maxcom units work or is someone trying to pull the wool over our eyes?" Given Max-corn's controversial history, I jumped at the chance to test two Of their models for 73.

The 200D and the XLD-150

f received the 200D (Maxcom's most popular) and the XLD-150 models for testing:. The

Photo A Maxcom 200D (bottom) and XLD-150 (top).

manufacturer's literature claims:

• high efficiency with instant matching over the specified frequency range;

•no control leads.

Maxcom markets the 200D as a commercial model with a power rating of 200 watts in SSB service (derate 75% for continuous duty) that covers 0.1 to 200 MHz. The XLD-150. on the other hand, is a "utNity" mode* designed for 1.5 to 30 MHz with a power handling capability of 150 watts, SSB only. The XLD-150 is smaller than its commercial cousin, and at 1 2 lbs is also a pound lighter. Both units take 500 coaxial feedlines and support a variety of installation configurations. The 200D carries a 5-year warranty, and Maxcom guarantees the XLD-150 for one year.

The Maxcom units initially impressed me as well made devices Each is housed in a stout aluminum box hnished in whrte enamel. SO 239 connectors accept the feedline, and the antenna legs attach to two ceramic insulators Trie XLD-150 measures 3V* x 9ft x V/i inches, whfle the 200D measures 43/4 x 10 x 2V* inches.

You Can't Come In i normally investigate ihe inner workings of an electronic device for review. I wanted to do the same wrth these tuners, but they are filled with epoxy. Removal of the epoxy could oniy damage the units. Unrelenting curiosity and X-ray equipment at my disposal, however, produced the pictures shown in the review.

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