The issue was June 1998. The article was focused on how to construct
one. 73 (Wayne Green) wasn't interested in all the tables of
performance data. He also wasn't interested in an excellent interview I
did with Wayne and Eric early on. In so many words he was pretty clear
that unless Elecraft was going to be a regular advertiser, he wasn't
going to devote space to promoting what was essentially a startup at the
time. Poor judgement on his part. I think Wayne Green perfectly
defined the term curmudgeon.
Doug -- K0DXV
On 4/8/2016 10:13 PM, Walter Underwood wrote:
The archives for 73 Magazine are online, so if you remember when, folks could
read the article.
https://archive.org/details/73-magazine
<https://archive.org/details/73-magazine>
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
On Apr 8, 2016, at 8:05 PM, Doug Person via Elecraft <[email protected]>
wrote:
I wrote an article for 73 many years ago where I effectively remade the Isotron
antenna with parts from Home Depot. At the time, a 20 meter version could be
built for about $15. I tested my version extensively and for the most part a
dipole made with two Hamsticks was quite superior.
They resonate, have good SWR bandwidth and generally radiate 5 watts of the 100 watts
that goes into them. A "magnetic loop" blows it away. I sold the sample
Isotron I bought at a hamfest for $5. (Bottom line - they are, as we say in the software
business, crapware)
Doug -- K0DXV
On 4/7/2016 5:12 PM, Jim Brown wrote:
This so-called "antenna" is at best dumb, and at worst a rip-off. As master
antenna-designer N6BT wrote some years ago, "everything 'works,' even a light bulb." He
demonstrated this by mounting a a light bulb on a wooden fencepost, feeding with coax that he had
carefully choked so that the coax could not radiate, and working all continents with it.
As others have noted, antennas like magnetic loops, loaded whips (HamSticks,
etc.), and long wires are the weapons of choice with limited space and/or
requirements of minimal visibility. If the frame of the building is
non-metallic, indoor antennas can work (but can also be mondo noisy on RX). If
the frame is metallic, the antenna must be outside. The good news is that the
building frame will work fine as a counterpoise (although it may block the
antenna in the direction of the building). A long wire launched away from the
building is best -- small diameter enameled wire can be hard to see, and works
fine as an antenna.
73, Jim K9YC
On Thu,4/7/2016 2:41 AM, Petr, OK1RP/M0SIS wrote:
I am sure that David talked about an Isotron antennas like this:
https://www.isotronantennas.com/
I intensively tested/used this antenna in 90's on 40m (product from Sigi,
DK9FN) and I have to say it is a nightmare in overall. From my own
experiences the performance of this toy was highly dependent to the
grounding availability, bandwidth was very small and tunning was influenced
by ground only but also by closed objects a lot.
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