check the 2nd reply here
https://www.eevblog.com/forum/rf-microw ... oscillator
and look at the videos
Search found 274 matches
- Wed Feb 07, 2024 6:36 pm
- Forum: General Discussion
- Topic: A modern day cry$TAL RADIO RECEIVER WITH CLA$$.
- Replies: 3
- Views: 11750
- Thu Feb 01, 2024 3:30 pm
- Forum: Questions & Advice
- Topic: Balcony antenna
- Replies: 11
- Views: 38501
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: 38501
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: 38501
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: 26731
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: 23697
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: 24474
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: 22346
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: 73698
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...
- Tue Sep 05, 2023 9:15 pm
- Forum: Questions & Advice
- Topic: Balun One Nine: cutting R1
- Replies: 14
- Views: 24474
Re: Balun One Nine: cutting R1
that one is the V2, no need to scrape anything it does not have the center tap even if the PCB shows it