Off Center Fed (OCF) Antennas

Slip On Feed Line Common Mode Line Isolator/Choke - 1/2"/12.7mm coax cable, 1.8-100 MHz, 5,10,15, 20 bead option, Mix 31

SKU SLO31-1/2-5
$19.95
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Slip On Feed Line Common Mode Line Isolator/Choke - 1/2"/12.7mm coax cable, 1.8-100 MHz, 5,10,15, 20 bead option, Mix 31
Product Details
Brand: Palomar Engineers
MPN: SLO31-1/2-NN, NN=5, 10, 15, 20
Country/Region of Manufacture: USA
Effective Frequency Range (MHz): 3-300 (5 bead), 1.8-300 (10, 15 bead)
PEP Power Rating (watts): same as coax cable rating
Common Mode Attenuation (db): see graph
Estimated Insertion Loss (db): .025
Input Connector Type: none
Output Connector Connector Type: none
Ground Connector (Y/N): none
Enclosure Size (LxWxH inches): none

1/2″/12.7mm max Cable Size Chokes

Model SLO-1/2 family of chokes are for use with ½” coax cable like RG-8, RG-213, 9913, LMR-400 and similar cables up to ½” diameter – works on all cable impedances (50, 62, 75, 90 ohms etc). 80-6 meters.Choose SLO-1/2 (5 beads) or for extended choking, choose SLO-1/2E (10 beads) or for super extended choking choose SLO-1/2SE (15 beads).

Each additional 5 beads is approximately 6 dB of common mode rejection (also 1 “S” unit of noise reduction).

Select chokes with minimum of 500 ohms at your frequency of interest for best results or upgrade to our CUBE(TM), or MC-1-3000 Maxi-Choker(TM) chokes up to 10,000 ohms choking.

Select 5 bead version for 80-2 meters use; 10 bead version for 160-6 meter use, 15 and 20 bead version for even higher choking power on 160-20 meter frequencies. Power rating is same as coax cable used power rating.

Snap On and Slip on Feed line chokes available in sizes to fix cables with outside diameters of 1/4", 3/8", 1/2", 3/4", 1" - check website for other size options.

The 5 bead, 1/2" model was previously part # BA-8

Testimonial:

KI7AY
Wanted to let you know that I was having a problem with RFI on 40m, but immediately after installing your Slip On Coax Feed Line Choke -1/2"/12.7mm cable, 1.8-300 MHz on a new RG-213 jumper between the IC-9100 and tuner, IT WENT COMPLETELY AWAY!


OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke,