Search found 277 matches
- Wed Mar 13, 2024 11:31 am
- Forum: General Discussion
- Topic: Another directional RX loop
- Replies: 14
- Views: 46109
Re: Another directional RX loop
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...
- Fri Mar 08, 2024 9:23 am
- Forum: General Discussion
- Topic: Another directional RX loop
- Replies: 14
- Views: 46109
Re: Another directional RX loop
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...
- Sun Mar 03, 2024 9:33 am
- Forum: General Discussion
- Topic: Another directional RX loop
- Replies: 14
- Views: 46109
Another directional RX loop
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...
- Wed Feb 07, 2024 6:36 pm
- Forum: General Discussion
- Topic: A modern day cry$TAL RADIO RECEIVER WITH CLA$$.
- Replies: 3
- Views: 17310
Re: A modern day cry$TAL RADIO RECEIVER WITH CLA$$.
check the 2nd reply here
https://www.eevblog.com/forum/rf-microw ... oscillator
and look at the videos
https://www.eevblog.com/forum/rf-microw ... oscillator
and look at the videos
- Thu Feb 01, 2024 3:30 pm
- Forum: Questions & Advice
- Topic: Balcony antenna
- Replies: 11
- Views: 52719
Re: Balcony antenna
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 ...
- Thu Feb 01, 2024 11:47 am
- Forum: Questions & Advice
- Topic: Balcony antenna
- Replies: 11
- Views: 52719
Re: Balcony antenna
I already found an enclosure for the balun you recommended. https://www.thingiverse.com/thing:2152913 That enclosure isn't waterproof, you should use a waterproof enclosure for the termination resistor and for the balun, as for the latter don't connect the antenna wire directly to the balun, instea...
- Mon Jan 29, 2024 8:33 am
- Forum: Questions & Advice
- Topic: Balcony antenna
- Replies: 11
- Views: 52719
Re: Balcony antenna
I'm going to build this one in the spring when the weather gets better due to the HOA's in my retirement complex. I mainly plan to use this from the 5-30 shortwave bands. So how long is too long for the wire length? I figure most of my listening will be in the 31 meter band. There's no "too lo...
- Wed Jan 24, 2024 6:49 pm
- Forum: General Discussion
- Topic: What does your listening post look like?
- Replies: 12
- Views: 37359
Re: What does your listening post look like?
My listening post doesn't have a lot of high priced gear. The monitor on the left controls an inexpensive RTL-SDR.BLOG V3 dongle while the monitor on the right controls an Airspy RSP1A. The little monitor on the bottom is the control head for a Uniden SDS100 that is dedicated to local 24/7 P25 moni...
- Tue Jan 02, 2024 5:02 pm
- Forum: Questions & Advice
- Topic: G7RGQ antenna
- Replies: 0
- Views: 33899
G7RGQ antenna
Didn't build it, but checking infos it seems to work pretty well https://www.mictronics.de/posts/G7RGQ-Antenna-1090MHz/ it's a vertical antenna for the ADS/B (aircraft) band which, looking at the NEC models I found offers a gain of around 5dBi, looking at the pics at the above URL, the antenna seems...
- Fri Sep 22, 2023 5:41 am
- Forum: Questions & Advice
- Topic: Balun One Nine: cutting R1
- Replies: 14
- Views: 40208
Re: Balun One Nine: cutting R1
The antenna works great. That null is deeeeeep! I'd like to put it in the rotator I have on the roof. My question now is about the recommended 3-meter height: Would that be from the ground, or from the roof itself? Thanks for the great antenna design! from the "ground plane" if the roof a...