d-fed dipole the winner.
73,
Erik K7TV
-Original Message-
From: Rick WA6NHC [mailto:wa6...@gmail.com]
Sent: Sunday, February 25, 2018 2:52 AM
To: Erik Basilier
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 faulting on high VSWR on power rise
Hi Erik,
I'll keep thi
Hi Erik,
I'll keep this short as the thread will likely be closed soon (or
should). What I have up now is Field Day style, simple antennas (the
inverted L for example, an 80M dipole, R7) shot into the trees so I
could get on, pending the install of 'the real station', hi. The water
pipe (30
To: Erik Basilier
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 faulting on high VSWR on power rise
I have an R7 (end fed vertical 40-10M). It and a 80M dipole are my current
antennas, until I plant a tower later this year (55' US Tower, motor drive,
tilt over). I have to admit
I have an R7 (end fed vertical 40-10M). It and a 80M dipole are my
current antennas, until I plant a tower later this year (55' US Tower,
motor drive, tilt over). I have to admit that I'm not a fan of vertical
antennas.
Since I moved here last year and haven't gotten the tower up yet, the R7
500 faulting on high VSWR on power rise
I’ve always presumed that the ratings were based on 1:1 SWR as there is no
reasonable way to define it otherwise. Actual ratings at other loads can be
inferred on that basis.
An end fed dipole is MUCH harder to tame than a dipole (or fan dipole)
I’ve always presumed that the ratings were based on 1:1 SWR as there is no
reasonable way to define it otherwise. Actual ratings at other loads can be
inferred on that basis.
An end fed dipole is MUCH harder to tame than a dipole (or fan dipole) and
inherently challenging to keep the RF away
feed on all bands.
73,
Erik K7TV
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Rick WA6NHC
Sent: Saturday, February 24, 2018 10:41 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 faulting on high VSWR on power
One exception is when the dipole is used on multiple bands, then a 4:1
may be required. That was the case for my 370' 80M EDZ (two opposing
5/8 wave, center fed). That is specifically a non-resonant antenna on
any ham band but it performed best with the 4:1 instead of the 1:1. It
was a compr
I have found that a 4:1 balun is seldom the proper choice for a ladder
line interface. I measure the impedance at the interface and then select
the balun type (usually a 1:1). The biggest problem I've had is the 4:1
transforming the impedance too low for the tuner. This can result in
over stres
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