Constructing, measuring
and adjusting a DIY-kit End Fed Half Wave Antenna for 40m with
extension for 80m. This publication tells the whole story: EFHW
40m + 80m extension
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After constructing this
EFHW Antenna, the measurements and adjustments in June 2020, I made
several versions of this document. It has now been fully
revised, to make it more suitable for the website. It is better
readable now.
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Modifying the V2000 with
1m50 radials - a
different story
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This started with the
purchase of three CRES (stainless steel) rods of 1m50, 5mm diameter,
because all publications that I found said 5mm. Radio friend Steven
brought the thread tap and tapped M5 on the rods.
First attempt to modify revealed: my V2000 has M6, and not M5.
This called for a different approach: diameter 6mm threaded ends with
8mm aluminum pipes. Read the V2000 modification by PA0SNY for all the
details
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Constructing a modified Gamma
Match Half Wave Dipole for 4 meters (70 MHz) from an (ever
purchased) SD-FM Dipole 87-194 MHz by Sirio.
A very satisfying result, after various calculations and
measuremnents.
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In the late Nineties I
acquired this SD-FM Dipole 87-194 MHz. Because it looked quite cool and
sturdy. I made the 2 meter antenna, that never was used. From garage to
cellar, but not on a roof.
Read how I gained experience with the Gamma Match, and how this finally
resulted in an Antenna that has great resemblance with the Sirio SD68,
intended for use on 68 - 78 MHz.
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Measuring a full size High
End Fed Antenna of PE1MWL: Full
length 80m EFHW PE1MWL
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This documents shows how
perfect this Antenna can be used on all classic and two WARC
HF-Bands.... but only for Region 1 (Europe). Without the use of an
Antenna Tuner.
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Understanding the 'half
wave' relation in an EndFedHalfWave Antenna: my
quest to understanding the half wave relation
An eye opener (for me anyway)
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Only after I started
building a 20m End Fed Half Wave (EFHW) antenna for 20m (with
extensions for 40m and 80m), I found out that resonance on 15m did not
truly exist. I took me a wile and some browsing till I found out why. I
explain it in this document
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