[IRCA] New Ferrite Bar MW Antenna
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[IRCA] New Ferrite Bar MW Antenna





Chuck Rippel saw this new antenna and posted it. It is very interesting, tho' expensive. Chuck sez:


Saw an ad in WorldRadio Magazine for this new directional antenna made
by National RF in San Diego, CA. Using a series of plug-ins, including
one that can be user defined, the antenna will cover from about 10 khz
through 2mHz.

<http://www.nationalrf.com/type_nlf-2.htm>http://www.nationalrf.com/type_nlf-2.htm

Chuck Rippel
Chesapeake, VA

Bill Bowers and I did a lot of experimenting with ferrite rod antennas about a decade ago, building up to the locally famous Monster, which was 3" diameter and 8 feet long. With all of that ferrite, I think it weighed something like 600 plus pounds. Basically, what we found out was that the gain of the antenna is proportional to its size of ferrite.... you just can't beat the laws of physics here, bigger is better AND the sharpness of the null is directly proportional to the slenderness of the ferrite. The National RF antenna sports a 17" long rod, making it - potentially - one of the finest of its type ever produced commercially. I sure would like to read a thorough review by an experienced MWaver. This may be one of the first antenna products created to meet the renewed interest in the ham community for 500 kHz. DXing.

Anybody got one of these beauties yet??

John B.
Stillwater, Oklahoma, USA
Rcvrs: WiNRADiO 313e, Eton e1, NRD-535(kiwa-mods)
Antennas: 700' NE/SW mini-Bev, Wellbrook Phased Array (pre-production version)

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