With this length of wire a coil of 11 turns is required, resonating the antenna on 1.950mhz with an swr of 1.5:1. the swr was adjusted using the tapping point on the coil near the feeder

A t130-2 met 24 windingen and a new 3 windingen, de capacitor c = 30 pf a t130-2 with 24 turns and a 3 turns driven coil. capacitor c = 30 pf

The feed point of the EFHW is in the order of 3000 to 5000 ohms while the 1/2 wave dipole will be closer to 50 ohms in the inverted V configuration

On this page I will describe the HWEF that I use since 2012 or so on 80m and 40m

Diy 60 Meter End Fed Half Wave Antenna Tuner

The vertical end fed half wave antenna is my choice for it's easy to employ and it's a perfect dx antenna, a 20m. version is about 10 m. long and has aprox. 3000 ohms at the feedpoint; so we need a simple tuner to reduce this to 50 ohm

The antenna a portablemulti-band end-fed half wave EFHW 40-10m with a 49:1 Unun

As a rough guide, a capacitor of 50pf across a winding of say 30 turns is a starting point for 40m. some experimenting with turns and tapping point is necessary. the coil former used was about 1/4 inches in diameter as found in old if transformers

Advantages and disadvantages, end-fed antenna unlike the dipole is fed at one end

The classic double extended zepp to improve pattern and swr bandwidth

An efhw as inverted-l from the feedpoint at the edge of property, about 10m upwards into the direction roof ridge

An end fed inverted monoband vee has a low impedance point around 1/4 wave away from ground, and the multiples of 1/4 wave on the feed side

Autotrasformatore con secondario isolato per fare dai 10m ai 20m in portatile

Si tratta di un accordatore LC con una capacità ed una induttanza

La End Fed-Hertz è un'ottima antenna, per mezzo di un trasformatore adattatore di impedenza a radiofrequenza , un BAL-UN

Dai 40 ai 160metri, la sua lunghezza in metri di mezz'onda piena si calcola così 1/2 onda = (150 : MHz) x 0,95 (0,95 coefficiente di propagazione della R.F. nel filo di rame, ovvero fattore K

How to build half wave antennas end fed and fed with a 50 ohm coupler work without long radials, fancy grounds, inductors, etc

Attualmente utilizzo come antenna un semplice filo di 10 metri impiegando come contrappeso un filo di 5 metri buttato per terra

Antenna end fed per i 20-40 metri in soli 11 metri di spazio

This antenna lets you get onto 80m in a horizontal distance of about 12m 40ft when used as an inverted slope with the apex at 8m

Adattare l'impedenza con un piccolo adattatore in grado di coniugare antenne da 300 - 500 Ohm con l'ingresso a 50 Ohm

End Fed Hertz trasformazione d'impedenza e contrappeso

Intrigued by a German OM positive experience with a 20m delta loop

The total antenna lenght is about 23 meters for 80,40,20,15 and 10 meter band

Efhw as an ideal temporary antenna for the hiker or camper. ease of installation appeals especially to me because of my long life of sorrows trying to get lines through tree

I used a FT 240 43 for much more power not needed but beter safe

End fed anntenna for the 17 and 12 WARC Bands 30m

End-fed Half wave or fed random antenna in inverted-L

A 40m through 17m mini end fed half wave antenna coupler

Un tipo un balun 1:7 oppure 1:8 per fronteggiare gli ohm presenti ai vertici della nostra antenna, quindi 3 giri di avvolgimento primario e 21 o 22 di secondario andranno bene, per quanto riguarda il ros non salgo mai sopra 1.6-1.8

E' consigliato l’uso dei toroidi in polvere di ferro anzichè in ferrite

Una veloce multibanda E.F.W.H.A. dedicata ai piccoli quadri banda come il mio FT857D

Homemade a multi band end fed trapped wire antenna

This antenna is a 12m long multiband antenna for 40m, 20m and 10m. it has a 1:60 autotransformer with a single ft-140-43 core for 100w pep

End-fed antennas are increasingly popular again, at least partly because of compact iron toroid cores. small soft-iron cores allow compact, easy-to-build, low-power transformers and network

Un trasformatore 1:64 su cui è collegato un filo lungo lambda/2 della frequenza prescelta, una versione a 3 o 5 bande in modo da avere maggiori chance su più frequenze, un filo di rame teso ha un'impedenza superiore ai 3.3 K ohm e quindi per poter adattare l'impedenza ai 50 ohm della radio, con un toroide FT240-43 - 1:64

This type of antenna has same performance as a dipole, but requires only one single mounting point, which makes this concept ideal for portabel stations, actual bandwith is more than 2 mhz with vswr better than 1:1,7

Un trasformatore con rapporto 7:1 con una capacità di 125 pF assicura una copertura delle bande di frequenze dai 30 ai 10 metri