1:1 Low Power Balun/Choke for CMC/Noise Reduction Gen II -Dipole / EFHW N9SAB

Description

Reduce or Eliminate the presence of CMCs in your QRP System with a Super-Small, Ultralight Choke/ Balun Rated for 25 Watts SSB /15 Watts CW / 10 Watts Digital

Rugged, Durable Construction – Prevents Feed-Line Radiation

Make your Low Power, Portable, Stealth and Base Operations even better

Simple, Elegant, High Quality For Less.

For 54.95 you will receive:

• An Original 2nd Generation Balun / Choke as depicted in the photos, tested and described below. Made in America from materials sourced from U.S. sellers.

• 2 BNC thread protector caps / one for each end
• Free Shipping within the United States
• Your order will be shipped within 3 business days of payment being received or sooner
• 60 Day free Returns

When one feeds one’s Nano Dipole with coax, common mode currents (CMCs) can be generated which can result in the feedline becoming part of the antenna system. this can degrade dipole performance and produce unwanted interference. Since we are working with QRP power levels, getting the most efficient antenna system possible is very important. We prefer to have all of the available wattage directed by the antenna radials, not the coax. On the receiving end, this also helps the coax shield from acting as a receiver, reducing noise levels. The insertion loss ranges from -45 dB on 40 Meters to -20dB on 10M (see the chart in the photo section). The choke makes an excellent companion for the Nano or the Linked Dipoles.

The Nano Dipole is available here: https://commsdepot.com/product/rugged-nano-dipole/

To reduce or eliminate these issues we have created an ultralight balun/choke to compliment the Nano Dipole. The purpose of a which is to connect a BALanced system (your Nano Mono-band Dipole) to an UNbalanced feed-line (your coax). Our Nano Balun Consists of a 13x8x6 mm toroid configured as a 1:1 guanella current balun with 15 turns of 2-Element wire (see schematic) connected to a BNC Female connector for the coax and a BNC Male connector for the antenna. The whole system weighs approximately 1.25 ounces (36 grams). This makes it an ideal traveling companion for your antenna. Plus, it seems to us that the darn things always cost too much, so we have tried to present a value alternative to much higher priced gear.

Like all of our equipment, the choke balun is produced in a water resistant, highly durable form factor and is tested on the air before shipment.