AM Broadcast RFI Kits


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!


SELECT A CATEGORY TO EXPLORE


Filters

Filters
When considering solutions for AM broadcast (550 Khz – 1.8 Mhz) you should consider Mix 77 ferrites available in a variety of shapes and sizes.  Choose a size to give the maximum number of turns of the affected wire or cable.

AM broadcast transmits on a low frequency with large antennas.  Consequently it takes a large antenna to receive the signals.  Typical “antennas” are AC house wiring, phone lines, long satellite or cable TV cables, DSL/CAT5 lines running between rooms, etc.  The device wires that connect to these  “antennas” need to be choked with as many turns through the ferrite as possible.  Some installation examples are shown below on this page.

For AC/ DC power cords and coax cables the F240-77 (2.4″ OD, 1.4″ ID) “Donut” toroid is the most popular.  Also available are smaller toroid donuts and Mix 77 beads. Shown below is a graph with 8, 10, and 12 turns through the toroid – obviously more turns has higher choking impedance.  Mix 77 toroid products are HERE and Mix 77 small beads (for small wires) are HERE

F240 77 Turns Comparison 1024x648 - AM Broadcast RFI Kits

F240-77 Turns Comparison from .1 – 8.1 Mhz

Shown below is a graph of frequency response verses choking magnitude for a F240-77 in the AM Broadcast band for a 12 turn coil around the toroid. (Same info as above but different frequency range).

AM Band Choking Graph F240 77 1024x648 - AM Broadcast RFI Kits

F240-77 Choking Impedance in AM Broadcast Band

 

 

Typical Installations for Donut/Ring Toroids

20131210 114716 150x150 - AM Broadcast RFI Kits

AC Cable on F-240 Toroid – 6 turns

20131210 115137 150x150 - AM Broadcast RFI Kits

Ethernet Cable on F-240 Toroid – 7 turns

20131222 125533 150x150 - AM Broadcast RFI Kits

Audio or Mic cable on F240- 12 turns

 

 Extra Mix 75 Snap On Beads  HERE – VERY effective for AM Broadcast RFI