AM Broadcast RFI Kits

Super Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 5000 Watts PEP, up to 60 dB noise reduction

SKU SBULLET-1B-5000EB
$129.95
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Optional Wire Dipole Kit
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Super Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 5000 Watts PEP, up to 60 dB noise reduction
Product Details
UPC: Does not apply
Brand: Palomar Engineers
MPN: Bullet-1B-5000EB
PEP Power Rating (watts): 5000
Common Mode Attenuation (db): up to 60 dB
Estimated Insertion Loss (db): .1
Input Connector Type: SO-239
Output Connector Connector Type: Side Eyebolts

New improved version now goes down to 500 KHz (25 dB common mode AM Broadcast band suppression) and up to 61 MHz < 2:1 SWR. Choose Balun only or add optional dipole wire kit (wire, Insulators, Spade lugs for attachment to balun - assembly required). Center insulator and Balun in one case - 1/4" stainless hardware and 5000 real watts rated!

The SBullet-1B-5000EB is a multi-core current balun with built in feed line choke offering up to 60 dB (on 40 meters) of common mode current rejection (plenty for most applications) to keep RFI off the coax outer braid during transmit operations. The SBullet-1B-5000EB is housed in a waterproof PVC enclosure that is lightweight yet robust in features and makes a great high power antenna feed solution for dipoles and other balanced antennas. Halyard hoist at top of balun for convenient attachment point. Input is via SO-239 coax connector and output with dual side eye bolt output and wire strain relief. Rated 5000 Watts PEP Watts from .1-61 MHz. SBullet-1B-5000EB weight is 2 pounds.

This balun/feedline choke keeps TRANSMIT RFI off the coax outer braid while transmitting. If your station suffers from common mode RFI noise on RECEIVE, then use one of our Common Mode Coax Noise Filters (such as the CMNF-5000) that suppresses common mode noise on RECEIVE operations.

Make a FAN DIPOLE using optional dipole kits (e.g. 80/40 would use extra 40 meter dipole if you chose the 80 meter dipole lit for this listing).

NOTE: We rate our Bullet baluns (and ununs) VERY conservatively at 5000 watts PEP with a 50% duty cycle. Some manufacturers selling low cost baluns may use a 5% duty cycle for their PEP rating to make it appear you get a higher rated balun for a lower price, but you may in fact be getting be getting less. Their 1500 watts PEP really means 750 watts continuous or 1500 watts at a 50% duty cycle compared to our 250 watts at 50% duty cycle. Our baluns typically cover a larger frequency range under 2:1 SWR which make your transceiver happy and probably will last longer with less electrical stress.

Remember we over engineer our products, to out perform our competition - just compare the weight of our baluns to theirs and you will know we put much more into our products so you don't have to worry about failure at a critical moment.


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