COMPACtenna
20m/2m/440
Antenna

 Not in stock 

A 20 inch antenna for 20 meters? Impossible! Until now . . .
The revolutionary COMPACtenna 20m/2m/440 uses a patented design which includes magnetic-field-enhancement. This allows the extremely short antenna to perform amazingly well for its height. Coverage includes 20 meters, 2 meters and 440 MHz! Power capacity is 100 Watts HF, 85 Watts 2m and 50 Watts 440. This break-through antenna was designed by Dr. Jack Nilsson N8NDL and offers superior performance on three popular amateur bands.

This antenna employs a unique magnetic field resonator (for less receiver noise), and features Electric/Magnetic Field Diversity Science & Technology design. This provides superior performance in non-line-of-sight obstructed environments, such as buildings, hills, in valley location, and indoor installations. This technology provides for a unique low-cost easy installation base station antenna in an attic as well as a variety of limited-space locations.

The 20m/2m/440 antenna require a 3/8"-24 mount not included (see below). This antenna may be used successfully with a very small ground plane. A simple 3/8x24 magnetic mount can be set on a 36 by 48 inch galvanized metal plate (available from Home Depot) or even a metal table! The result is a compact, yet effective antenna for a variety of applications.

Mounting the antenna to a small flat metal sheet or mesh that is only 3 feet by 3 feet provides good (V)SWR’s and performance.
[Note: For standard type technology antennas, a ground plane this small would be inadequate for the 20 Meter band, potentially resulting not only in poor (V)SWR’s but also RF on the outside of the coaxial shield coming back down toward the radio. This is undesirable for a number of reasons including unpredictable signal patterns with the outside of the shield of the coax acting as a poor counterpoise radiator, as well as noise, and transceiver/amplifier possible concerns.]

(V)SWR: Nominal:  < 2:1 14.15 - 14.35 MHz (20 Meter Band); 144-148 MHz (2 Meter Band); 420-450 MHz (440 Band)

One year limited mfg. warranty. Each antenna is quality tested. Made in the U.S.A.         _

VIEW LARGER & INFO	MFJ-335BT Magnet Mount for fixed use only! Base: 3/8-24 Coax: 17 ft. RG58 Connector: PL259 Not in stock	VIEW LARGER & INFO	Hustler SSM-2 Ball Mount only Stainless Steel Base: 3/8x24 Coax: None Connector: None Order: #2004 Price: $38.00  $24.98
VIEW LARGER & INFO	HDM1B Hole Mount Base: 3/8-24 Coax: None Connector: SO239 Order: #4283 Price: $13.88  $5.98	INFO	SS750DH Hole Mount Heavy Duty Base: 3/8x24 Coax: None Connector: SO239 Order:   Price:  Not in stock
INFO	SM1 Hole Mount Base: 3/8x24 Coax: None Connector: SO239 Order:    Price:  Not in stock	INFO	SM1L Hole Mount Right Angle Base: 3/8x24 Coax: None Connector: SO239 Order: #4584 Price: $12.00  $8.98
VIEW LARGER	Hustler MBM Magnet Mount for fixed use only! Base: 3/8-24 Coax: 16 ft. RG58 Connector: PL259 Not in stock