Antenna Products

End Fed Feed Line Choke for Non-Resonant and End Fed Half Wave Antennas

In stock
Product Details
Type: 8-10 turns of RG-8X with Pl259 Connector, 3 turns of RG-213 cable
RFI Range (MHz): 1-300 MHz
ID-B (in/mm): 1.4"
OD-A (in/mm): 2.4"
Height-C (in/mm): 1/2"

Feed Line Choke

Each end fed antenna needs a feed line
choke at the radio end of the coax to stop the antenna common mode
current (on the coax braid) from getting into the radio when
transmitting and also to stop RFI common mode noise when receiving. The
simplest, most cost effective choke is a ferrite ring (F240 size)
installed as shown in the picture (at the transceiver end of the coax)

Add the Feed line choke (part # EFFLC-240) for $10 to your end fed
today and stop the pesky RFI from getting into your radio and causing
audio distortion or unexpected operation!

NOTE: Coax shown in picture is NOT INCLUDED and is shown as an installation example only. If you want a pre-wound choke check part# JC-1-1500-3 or JC-1-1500-6.

For non-resonant end fed antennas placement of the choke from 16-95 feet away from the antenna feed point to use the coax braid as the counterpoise (since these antennas are really off center fed dipoles with the short side using the coax braid as the counterpoise. Wind 8-10 turns thru center for an effective 3-30 MHz choke. See Bullet Antenna configurations for exact choke placement depending upon wire length.

For End fed Half Wave antennas place 1-3 feet from antenna feed point to act as short counterpoise for these voltage fed antennas. Use 8-10 turns.

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Palomar antenna products include feed line chokes, feed line to antenna matching transformers, static bleeders and other accessories. Click on the link to connect to the product you need.