Sunday, October 30, 2016

Simple Ham Radio Antennas--Comet CHA250B Review. Post #937.

Comet CHA250B Review (http://www.k3dav.com/cometcha250bhfvert.htm).
Author: Dave (K3DAV).
Accessed on 31 October 2016, 02:45 hrs, UTC.
Please click title link or enter post url to read the full article.
Comment:

Although the Comet 250B Vertical antenna is a compromise, it has just enough presence and "punch" to allow those living in restricted housing to get on the air with a decent signal. Sometimes, the only way to go is up.

Dave (K3DAV) has written a positive review of this restricted space antenna, which "is for  the space restricted ham who only uses 100 watts of power out of the back of the radio." Dave explains the theory, construction, and use of this antenna which performs adequately from 80 through 10 meters.  Although the antenna isn't designed to work on 160 meters, Dave has used the Comet 250B to make several contacts on the "gentlemen's band." The addition of ground radials, while not required, will improve overall performance of the antenna.  Other than the main coil, which acts as an impedance transformer, the antenna requires no additional coils for use.  The use of an antenna "tuner" is not required. Dave also lists the results of his testing program and says the CHAB will work very well if power doesn't exceed 100 watts.  Mount the antenna as high as you can to maximize performance.

Despite its shortcomings, the Comet CHA250B will get you on the air with a remarkably small "footprint", something useful in areas where backyard space is limited.  If you can't erect a full half-wave dipole, try this multiband vertical from Comet.
-----------------------------------
Be sure to check the blog sidebars for additional antenna and propagation articles.

For amateur radio news and events, please visit http://www.kh6jrm.info (breaking news of interest to the amateur radio community) and http://bigislandarrlnews.wordpress.com (ARRL news and events for Hawaii Island radio amateurs).

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).