Description: QTY 10 for club projectThis is a perfect Radio club project, simple, easy to build, good for learning, inexpensive and most importantly - USEFUL! Bring your club together for a project they will love to build and use. This listing is for 10 kits. What if you need a different QTY (10 or more)? Send me a message and I will make a listing for your qty at the exact per unit price ($25 each plus $1 each to USA ship) This is a savings off our eBay listing for the single unit price Want just one or two? See --->>> https://www.ebay.com/itm/325869783066 This is the KM4CFT End Fed QRP unun kit, very small (1 7/8"L x 5/8"W and very light (0.4 ounce)! Perfect for SOTA, POTA, backpacking or just seeing what you can work in a minimalist way. You build this kit to feed your EFHW (End Fed Half wave) or EFRW (End Fed random Wire) antenna. Easy to build KIT. Complete Instructions at radiodan.com/pdf Power rating : 10 watts SSB, 5 watts CW/digital . Discussion of unun use: Antenna TypesThis antenna unun kit is designed to be built for one of the two types of end fed antennas described below: End Fed Half WaveThe End Fed Half Wave (EFHW) is known as a resonant antenna. This means it is designed to be usedwithout an antenna tuner. They are designed to be resonant on half wave multiples of its resonantfrequency. So an 80 meter EFHW is (theoretically) resonant on the 80, 40, 20, and 10 meter bands. Thisisn’t completely true though since the bands aren’t exactly multiples of each other. To remedy this, youcan use a loading coil along the wire to bring other bands into resonance. These antennas should bedeployed in the same fashion as a dipole: sloper, inverted vee, or even vertical if you use a feedline. End Fed Random WireThe End Fed Random Wire (EFRW) antenna is not resonant and is designed to be used with an antennatuner. The antenna is essentially designed to be equally “out of tune” on a large range of frequencies,such that a tuner can be used to bring the antenna into a match, and therefore be usable on many bands.This is a great option for radios that have a built-in ATU like the Elecraft KX2, KX3, KH1 and theXiegu X6100 and X5105. With this type of antenna, you want to prevent the antenna from beingresonant on any particular band. For finding the length you want, I recommend looking at an articlethat the University of Delaware posted. It can be easily found by doing an internet search for “End fedrandom wire antenna lengths” Manual at radiodan.com/pdf
Price: 249.95 USD
Location: Fort Collins, Colorado
End Time: 2024-08-01T19:42:25.000Z
Shipping Cost: 9.95 USD
Product Images
Item Specifics
All returns accepted: ReturnsNotAccepted
Compatible Brand: Universal
Non-Domestic Product: No
Custom Bundle: No
Band: HF
MPN: 1:49 49:1 EFHW
Compatible Product: Base Station Radio
Bundle Listing: No
Modified Item: No
Brand: Unbranded
Type: Antenna
Model: EFHW unun kit
Frequency Band(s): HF
Country/Region of Manufacture: United States
