I don't know exactly what G3TPW is doing these days but M0ZIM is selling
a commercial cobwebb: see
http://www.mcr666.com/sales1/ham-radio/4-meter-70-meg-base-vertical-antenna/cobwebb-antenna/
Usual disclaimers - I do have one of these antennas but otherwise no
interest in the operation. I think Mark will ship worldwide.
Chris
G5VZ / WG5VZ
On 31/05/2013 22:44, Bill Blomgren wrote:
Exactly - Not sure what is going on with the "commercial" version's guy... I
suspect that is a side venture, and 'real work' probably has him tied up.
It's either that, or he doesn't want to fight with exchange rates, shipping out
of olde blighty, and all that stuff.
That said.. I'm wondering if there are other baluns that might have better
performance up as far as say 6 meters... <heh> - allowing a 6th band...
----- Original Message -----
From: [email protected]
To: Bill Blomgren
Cc: [email protected]
Sent: Friday, May 31, 2013 6:54 AM
Subject: Re: [Elecraft] cobweb antenna
Hello Bill,
I have no intent to denigrate the design and functionality of the "Cobweb"
style antenna but.........
Several years ago I was inclined to acquire the G3TPW commercial version of the
"CobWebb" antenna, I found the website ( www.g3tpw.co.u ) and sent an email asking
how to order, method of payment & shipping charges, etc. Got no response......I thought
maybe there was some problem with the 1st email attempt so I sent another.....still no
response. So I sent an inquiry via regular mail, including a self addressed (with postage)
return envelope......no reply whatsoever.......
So I can't comment on how well the G3TPW version functions......but in
consideration of my above described experience, maybe you should limit your
effort to a homebrew version.
Also, later I had good results with the homebrew version of the Buddipole,
built from free instructions on W3FF's homepage (
https://sites.google.com/site/w3ffhomepage/ ). But back then I was doing more
portable ops and since the commercial version is more sturdy I decided to get
one......saw one being offered on ebay so I bid and won the auction. Eventually
I lost one small bit and needed a replacement part so I contacted W3FF and got
very fast response....even though I hadn't purchased direct from them.
So I've decided customer service is just as important as functionality when
deciding which products to acquire. Just my opinion...............
Rich K2CPE
K2 #1102
------------------------------------------------------------------------------
From: "Bill Blomgren" <[email protected]>
To: [email protected]
Sent: Thursday, May 30, 2013 10:27:22 PM
Subject: [Elecraft] cobweb antenna
I'm still in the "pre-purchase" stage.. but I'm sort of thinking that the K3
is where I'm going to end up.. Possibly with the preamp...and then there is
the big problem: what to make it to the air with.....
The idea of starting off with the buddipole system is out there - and very
possible...
I've also been reading up on the plusses and minuses of many of the
alternatives that may be possible in an apartment life...
One is the magnetic loop - which is a tad pricey with the vac. variable --
lots of copper, and the need to tune the thing every time you change
frequency - and not just antenna tuner stuff - as in changing the cap on the
antenna itself. It is a very high q (and thus voltage and current)
critter...Rube Golberg figured out how to do that.. motors with long screw
drives into a sealed box with the cap inside..with very high voltages
there... and thus requiring altitude for safety..
I came across a nifty square thing called a cobweb, which is more or less
semi-flat over 4-5 bands... is very light..and can be made of pvc pipe or
possibly fiber glass because it just has 5 wires in a big square.. One
antenna to cover 20 17 15, 12 and 10 meters sounds interesting.. One of the
designs even works on 6, but has higher losses... (That may be the baluns
they use for a 4-1 impedance match and to go unbalanced...
Has anyone tried one of these critters, and if so, is the Elecraft happy
with it?
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