SWLing Post Message Board

just a short note about how to route the coax feeding the SULA; the image below shows the effect of routing the coax outside the SULA or inside it (through the center), as you can easily see, routing the coax toward the center (second image from top) heavily changes the pattern, the backside "n...

Jock, any update regarding outdoor antennas ?

I obviously like it to bits! :) No, seriously, it's not having any severe highpass/reduced sensitivity issues typical for ham transceivers on MW/LW and it has all the nice tools one would want in a MW DX radio (particularly passband tuning and notch filter), being an SDR and showing me faint carrie...

13dka wrote: ↑Sat Oct 22, 2022 6:19 pm Got the new Belka (2022 model) today, went to the dike with it... <3 <3

hmmm... sounds like you had some wild fun

as for the CTL, did you consider changing the size of the sides ? I mean, for example, making the vertical size 1/2 of the horizontal (or the other way around) while keeping the same total perimeter

Welcome to the forum, qrp-gaijin! Hope you guys tell me when it's time to charge my little dremel tool. :mrgreen: ~20dB more gain / less losses at little more than 1/2 the size of the SULA sounds pretty intriguing, even though the overall coverage seems to be pretty small (7-21Mhz?). ...check if it...

forgot (and OT) do you know what happened to Jim's ham forum (the radio board) ? I know you were a member there, and there were a lot of cool folks, but then, it went suddenly "poof" <sigh>

first of all, at the moment I'm busy helping some relatives picking olives from trees, so please forgive me if I delay my replies; also, as you can guess. I've no way to run NEC simulations here :D (note: did you know that ezNEC is now free ? https://www.eznec.com/ ) ... anyhow, your simulations are...

forgot, (yes, still ferreting around <sigh>); try the following: load the CTL model, remove the cap/resistor from the outer loop and replace the cap in the inner loop with a resistor (530 Ohms like the SULA will do), now run the NEC model, done so, change the inner loop size and check the result, do...

I'm in a hurry, so I'll keep this short; first, that loop and dipoles setup somewhat recalls at large a yagi (dipoles), did you try changing the size/spacing of the dipoles ? Then, about the CTL, I started wondering if it may be used as a TX antenna, in such a case it would be interesting for lower ...