SWL Magnetic Longwire Balun


Quick, Easy & Affordable Antennas and RFI Solutions for everybody!

Helpful Technical Guides - Learn how to select, configure and use our products in your station -FREE Downloads


HF WIRE ANTENNAS
OVER 10,000 Installed worldwide!

BULLET End Fed Antennas
Shorter, safer, more bands in less space than EFHW
Off Center Fed Dipoles
Traditional dipole style but cut for more bands then other vendors!
End Fed OCF
160-6M, 80-6M, 40-6M or 20-6M but only 2 supports, shorter than EFHW - popular with POTA ops
Full Wave Loop
Quieter on receive and multi-directional gain on higher bands, no need to rotate!

ZS6BKW Multi-band Ladder Line Fed
No tune on 5 bands!

Broadband Terminated Dipoles (BBTD, T2FD)
DIY Parts for ALE, MARS, Hi duty cycle data modes


ANTENNA ACCESSORIES
Coax Common Mode Chokes - Slip On, Snap On, Jumper, Mini/Maxi-Choker/Line Isolator, DIY Ferrite Choke Kits

Noise Filters
- Coax, AC/DC Power 100 KHz - 150 MHz, up to -48 dB noise suppression - hear DX again!

Baluns & Ununs (1:1-81:1 ratios) for RX, 100/500/1500/5000 Watts including Hybrids (with choke) and Multi-Ratio

RFI SOLUTIONS
RF Detectors - SIGNALPEN(TM) PENCIL SIZE RF Detector, 60 Hz to 5 GHz, Miliwatts to Kilowatts, Direct Contact or Inductive Detector, No Battery & Fits in Your Shirt Pocket!

RFI Solutions - Consumer Electronics, Ham Radio, Computer, Audio/Home Theater, Wall Warts, Solar and more!

Ferrite Products- Rings, Snap On, Slip On, useful from 150KHz - 2 GHZ, Mixes 31, 43, 52, 61, 75, 77

Radio Transceiver/Linear Amplifier RFI Kits - All Brands, VLF to UHF, QRP to Multi-KW

FREE USPS Ground SHIPPING to USA Destinations for orders over $100!


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Filters

Filters

SWL Receiver Noise Reduction

Do you have high noise levels on your shortwave receiver?  Much of this noise is common mode noise picked up on your coaxial feed line from electronic devices in your home or from the neighborhood.  Much of this “noise” can be suppressed with a common mode noise filter for coax lines.  For SWL’s the most popular is the CMNF-6 available with SO-239, F or BNC connectors and simply plugs in line with your coax next to your receiver.

See picture below for product examples or click on COMMON MODE NOISE FILTERS for more info.

CMNF 6 Graph and product 1024x791 - SWL Magnetic Longwire Balun

Typical user comment:

The filter was quite effective. Was surprised that it actually reduced the noise level
more than the signal so S+N/N improved by 1.9 S units.

Bill