AM Broadcast RFI Kits

50:50 (1:1) CUBE™ Ladder Line/Beam to Coax Balun, 1.8-61 MHz, 1.5KW, G5RV/ZS6BKW/Dipole/Beam

SKU CB-1-1500TS
$119.95
Bulk pricing available for quantities of 2 units or more
Input Connector
Stud Position
1
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50:50 (1:1) CUBE™ Ladder Line/Beam to Coax Balun, 1.8-61 MHz, 1.5KW, G5RV/ZS6BKW/Dipole/Beam
Product Details
MPN: CB-1-1500TS
Country/Region of Manufacture: USA
Input ohms/Output ohms: 50 ohms in, 50 - 150 ouhms output
Frequency Range < 2:1 SWR (MHz): 1.8-61 MHz
PEP Power Rating (watts): 1500
Input Connector: UHF or N
Output Connector(s): top studs
Hardware Type: Stainless Steel output connectors
Enclosure Size: 4 x 4 x 2
Antenna Compatability: G5RV/ZS6BKW/Dipole/balanced output

The lower powered version of our popular CB-1-5000, the CB-1-1500TS Balun is a 50 ohm to 50 ohm, quad core feed line choke designed to provide high choking impedance between a balanced ladder line feed line (zepp, G5RV/ZS6BKW, extended double zepp, etc.) and short 50 ohm coax feed line (to antenna tuner) at a power of 1500 watts PEP from 1.8 to 61 MHz. The CB-1-1500TS is configured as a Guanilla transmission line transformer with balanced outputs (current balun configuration). It is best used when ladder line impedance seen at the end of the ladder line to balun connection is close to 50-150 ohms. Enclosure box is 4″ x 4″ x 2″. Typical choking impedance range is 1K-10K ohms from 1-61 MHz and common mode suppression is 30 dB..


Typical ZS6BKW multi-band antenna with CB-1-1500 or CB-1-5000

ZS6BKW at AK6R png - AM Broadcast RFI Kits

N Connector versions are made to order, email for quantity production times

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