NEW PRODUCT ALERT
SIGNALPEN(TM) PENCIL SIZE RF Detector, 60 Hz to 1.2 GHz, Miliwatts to Kilowatts, Direct Contact or Inductive Detector, No Battery, Fits in Shirt Pocket!
BULLET™ END FED ANTENNAS - 80-6 Meter - 100/500/1500 Watts
SHORTER, SAFER, MORE BANDS THAN EFHW
Bullet end fed antennas are shorter than conventional dipoles, yet deliver superior performance on many bands using the radiating coax as part of the antenna. They come in a variety of power levels, and work great for portable or permanent installations. Thousands in use world-wide! Selected models available at Ham Radio Outlet and all available on company website where full details on these antennas and many accessories are shown.
BULLET-2006 Antenna (Click for more info)
BULLET-4006 Antenna (Click for more info)
BULLET-8006 Antenna (click for more info)
Palomar Engineers Antenna Info Sheet
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HF Wire Antennas - End Feds, Off Center Fed, Loop, T2FD/BBTD, Dipoles and Zepps, 160-6 Meters, Wire, Hardware and Instructions for you.
Ferrite Products - Rings, Snap On, Slip On, useful from 150KHz - 2 GHZ, Mixs 31, 43, 52, 61, 75
RFI Solutions - Consumer Electronics, Computer, Audio/Home Theater, Wall Warts, Solar and more!
Baluns/Ununs/Chokes (1:1-81:1 ratios) for RX, 100/500/1500/5000 Watts including Hybrids (with choke) and Multi-Ratio
Radio Transceiver/Linear Amplifier RFI Kits - All Brands, VLF, HF to UHF
Noise Filters - Coax, AC and DC power 100 KHz - 150 MHz, up to -48 dB noise suppression - hear DX again!
Palomar Engineers® products are over engineered to outperform the competition without being over priced!Buy DIRECT, on eBay or at Ham Radio Outlet stores nationwide, HRO Product List HERE QUICK and EASY RFI Solutions for Consumer Electronics - FREE RFI Tip Sheet |
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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 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).
F240-77 Choking Impedance in AM Broadcast Band
Typical Installations for Donut/Ring Toroids
 AC Cable on F-240 Toroid – 6 turns |
 Ethernet Cable on F-240 Toroid – 7 turns |
 Audio or Mic cable on F240- 12 turns |
Extra Mix 75 Snap On Beads HERE – VERY effective for AM Broadcast RFI