Search found 275 matches
- Sun Mar 03, 2024 9:33 am
- Forum: General Discussion
- Topic: Another directional RX loop
- Replies: 14
- Views: 31606
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$$.
- Replies: 3
- Views: 13303
Re: A modern day cry$TAL RADIO RECEIVER WITH CLA$$.
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: 42684
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: 42684
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: 42684
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: 29197
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: 26720
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: 26487
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...
- Mon Sep 11, 2023 3:15 pm
- Forum: General Discussion
- Topic: A nice and simple regen receiver
- Replies: 3
- Views: 23680
Re: A nice and simple regen receiver
And here's another interesting circuit https://antiqueradios.com/forums/viewtopic.php?t=373629 it's a superhet based on the classic NE602, but with a difference, the LO is a regen stage based on the LM386 (yes, not kidding) SW Superhet with Regen IF.png that "hack" allows to improve the pe...
- Mon Sep 11, 2023 3:05 pm
- Forum: General Discussion
- Topic: The Belka (-DSP/-DX/-v3) appreciation thread
- Replies: 34
- Views: 81063
Re: The Belka (-DSP/-DX/-v3) appreciation thread
Late on this (have been on holidays :D) but I think that those folks are comparing apples and oranges and they just "shoot" stuff w/o even understanding what they're talking about; just consider that the Belka is a "self contained" unit, while a standard SDR needs a computer, let...