Hi to you all
I have build 3 of those miniloops in the past.
I was not very happy with them
I used copper water pipe of half an inch and I used 5/8 inch for an other loop.
I used a very large remote controlled motor driven air-capacitor in this loop.
With this cap I could use 100 W into the loop and the cap. didnt spark.
The resuls of a 2 meter (6 ft) dia loop on 20 mtrs were worse then my GP on 20.
My rotatable 2 x 7 mtr dipole with thick open wire for feedline and an enourmes balanced tuner does a far better job on 80 mtrs as the 2 mtr dia magloop (miniloop because there is nothing more Magnetic about it as a dipole or a big loop) I had
At this moment I am building a new specialy designed ATU that is balanced and handles low Z very well and even high Z ok .
This tuner uses a high Q all ceramic Russian surplus roller inductor with extree high eficiency and very big air capacitors with welded plates for high Q and low losses.
This tuner has no switches at all for getting R losses als low as possible.
Wiring is done with red copper strips of 5/9 x 1/25 inch (15 x 1 mm)
The balun at the transciever side of the tuner is wired with 6 x .5 mm square paralel teflon insulated wire
This is all done to get as much power s possible in the 2 x 7 mtr V-dipole with open wire on 10-80 mtrs.
Because of extreme size and cabinet of brushed stainles steel and the need to balance the rotors of the capacitors because the rotors would tumble down on their heavy weight.
This tuner is 20 inch wide 16 inch deep and 10 inch high (inside measure of cabinet without knobs and connectors) and weighs more then 20 Kg.
When it is finished an article nd pictures will be at my blog at:http://blogs.hamstart.net/blog02
the style is retro in brushed stainless steel and plexiglass.
All lettering on top and front are in Russian.
The name of this tuner is "Soyuz"
And the design is dedicated to Andre Kuipers our Dutch long stay in space record holding cosmonaut.
He was in ISS from december 2011 - juli 2012.
He travelled to and from Iss in a Coyus TMA 3M