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Water pipe is very impure copper..it does not need to be 99% or even near, just a copper colour will do to sell it.. Copper is copper..it costs x? per ton.. so if it’s cheap there is a

When I worked in the aerospace industry and had to pot electronics in epoxy (for high g loading) we would first spray the PCB with a thin coat of resilient conformal coating then pot it in high temp

Ya - those loop calcs are, inaccurate when loop circumference is like 1/4 wave. A comparison between loop calc and real

How much worse is water pipe? It’s cheap because it’s used in large quantities. In fact, 15 mm is cheaper than smaller water pipe because 15 mm is more commonly used. 2” diameter helix is going

Hi Why not contact Andrew directly and see what he says?? He is a very reasonable man whom cares about his customers though out the world..( not just here in 40degree c England ( yes it was 100f plus

Hi Ed Disagree on a few points there. But best tubing I have found is air con tubing or if you can get 2 inch heliax coax..but if air con Not china made! Ali at best has twice R of copper. More

&#92;(N6RK&#92;) <richard@...> wrote: /g/Test-Equipment-Design-Construction The main thread

Design your loop with 66pacific small transmitting loop calculator ( https://www.66pacific.com/calculators/small-transmitting-loop-antenna-calculator.aspx) or similar program. Build your loop from

I lived in Arizona before moving to Oregon and have had 3 modules fail in about 15 years, probably from heat. Andy has been kind enough to replace them when I asked about the failure. I cover the

Cover them with shiny stuff...ya think... trust me...those of us who were born, raised and live in Florida (I am an engineer whose family has been in Florida for almost 100 years and I for 80 of'em)

Hi “Spending a lot of money on large copper pipes for the TX loop results in high Q, which causes very narrow bandwidth, and limited power handling. Much better to make the loop larger and just

Which group is discussing Q meters? I assume you are talking about transmitting loops. Litz wire in general, doesn't do much for frequencies above 1 MHz or so. The only ham band where it could do

Guys, ?The best thing to do is protect them from the direct sun. You could cover the head amp with a shinny aluminium cover. THINK OUTSIDE THE BOX.?Everett N4CY

I agree, the Florida, Arizona heat problems destroy most outside use electronics. This is especially true of products designed and used in European countries. They do not take into consideration that

I am on my third Wellbrook replacement loop head. It appears that the potted resin is not only keeping water out (amongst other things) but seriously keeping heat in. The heat buildup in Florida is

Dear Jinze and other members: Please,have a look at https://www.microflex.org/index.php/en/magnetic-loop-antenna-amp-en for my attempt for a open source version of the LZ1AQ amp. 73, Andre,

Watching the discussion about Q meters in another group. I see people here sometimes building loops with copper pipe or litz wire to reduce losses. What about actually measuring Q? I have some ideas

This man is a liar, the antenna he sells on the second-hand market in China is a joke, many Chinese hams are also deceived, there is a false propaganda appearance, his name is "Goku Antenna", I want

Hi Jeff, thanks for the prompt replay and picture. I am sure many magloops lovers will get RF excited...hi 73 GianI7SWX

https://www.ukrainianworldcongress.org/wp-content/uploads/2022/06/himars-has -arrived-in-ukraine.png HIMARS Image in Ukraine. The HIMARS built for other countries appear to have 2 verticals on