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Also, a DUE note ! The idea came after a request from my dear friend Kostas ( SV3ORA ); he asked me if it was possible to make the "SULA" smaller and less visible (basically it shouldn't look like an antenna) and told me that ideally he needed some given dimensions At first, knowing all th...

Hi Egil !! Happy to read that my impressions have been confirmed; while that antenna isn't "par up" with the SULA, its main advantage is the fact that it's really compact; as for the resistor value, yes, that one should be changed if the antenna size isn't the same as the one I posted, and...

here's a better setup for the antenna; notice that the choke MUST be installed otherwise the cable could (would) become part of the antenna and totally screw the cardioid pattern; in this setup most of the wire runs inside the upper pipe so it's protected from UV and weather, same goes for the 9:1, ...

Here's a general idea to build the antenna, notice that the resistor may be placed inside the upper pipe, by drilling two holes, also, the two pipes are both PVC ones, the top one is sealed at top with a cap and all holes used to pass through the wire are sealed with good sealant, the 9:1, preamp an...

Thats a great idea! Thanks for sharing. This version should be much easier to build for beginners than the SULA. And a suitable balun and preamp can be found at very low cost on the web. 73 Egil - LA2PJ Egil, notice that the BalUn is the same used with the SULA, and may either be bought (e.g. the N...

and since we're at it... I "squeezed" the SULA :D The idea was to find a more portable antenna, and after some fiddling I came out with this design https://postimg.cc/56N9FqM4 https://i.postimg.cc/5N8XTn7C/recloop-dir.png the loop is made of 1.5mm insulated wire and the whole antenna could...

For a fixed installation - looks like a worthwhile project! For portable usage and small spaces, well -> SULA! :) Well, sure, that 4-loops isn't as easy to bring around as the SULA Oh and if anyone is interested... I was curious to see if I could simplify that project while still having an "el...

this one is from QST http://www.arrl.org/files/file/QEX_Next_Issue/Sep-Oct_2012/Bauman_QST_10_12.pdf the design is nice and the resulting antenna will probably offer good performance, but requires building phasing lines and them some, the advantage is that it is electronically "rotated" bu...

check the 2nd reply here

https://www.eevblog.com/forum/rf-microw ... oscillator

and look at the videos

The "enclosed" version of the NooElec v2 isn't waterproof, either, and weather/mist/rain will quickly damage the little balun, you want something like this (just an example) https://www.amazon.com/LeMotech-Dustproof-Waterproof-Electrical-150mmx110mmx70mm/dp/B075DHRJHZ the box doesn't need ...