Search found 174 matches

by JEL
Thu Feb 27, 2020 7:49 am
Forum: Signal Identification Help
Topic: AM-radio with unstable frequency?
Replies: 4
Views: 8563

Re: AM-radio with unstable frequency?

same date and signal https://youtu.be/4oI95N7EOsE Very cool :) Much better reception than I got. May not be Chinese after all, but perhaps some pirate-station? I have noticed Russian pirates near 3 MHz and their AM-carriers drift all over the place too, similar to this one. And I also receive those...
by JEL
Wed Feb 26, 2020 6:44 am
Forum: Signal Identification Help
Topic: AM-radio with unstable frequency?
Replies: 4
Views: 8563

Re: AM-radio with unstable frequency?

It could just be receiver intermodulation. If you have a 10 or 20 dB attenuator insert it and see if you still receive the station. Thanks, but I really doubt it is intermodulation. When I get those they never move around unless I scroll the frequency-window. And when I do that they always scroll i...
by JEL
Tue Feb 25, 2020 1:43 pm
Forum: Signal Identification Help
Topic: AM-radio with unstable frequency?
Replies: 4
Views: 8563

AM-radio with unstable frequency?

What might be causing this 'bouncy-house' signal? I am guessing it is a Chinese AM-radio-station, but it is too faint for me to be sure. The carrier kept going up and down several kHz like it was on a roller-coaster, but the signal itself was clear (Apart from being faint of course. What I mean is; ...
by JEL
Sun Feb 23, 2020 9:10 pm
Forum: Other SDR Devices
Topic: Automatic notch-filter for SDR# ?
Replies: 2
Views: 4176

Re: Automatic notch-filter for SDR# ?

Thanks for the suggestion, but I am looking for a plugin that integrates directly with SDR# though (Since it has other functions I use a lot)
by JEL
Wed Feb 19, 2020 11:04 pm
Forum: Other SDR Devices
Topic: Automatic notch-filter for SDR# ?
Replies: 2
Views: 4176

Automatic notch-filter for SDR# ?

SDRconsoleV3 has a function called notch-filter, which, when activated, automatically removes the humming from spikes in the bandwidth you're listening to. It's very useful, in my opinion, since it has the effect of nulling out the buzzing these spikes can create and convert the sound into a more 'c...
by JEL
Tue Feb 18, 2020 12:23 pm
Forum: Antennas
Topic: Question regarding loop designs
Replies: 8
Views: 4284

Re: Question regarding loop designs

You did not specify the frequency range you want to use the loop and if you intend to use a untuned or a tuned (magnetic) loop. The grid will do two things increase capacitance = detune it and shield electrical antennas. Magnetic loops unless completely shielded in a metall cage will be detuned due...
by JEL
Thu Feb 13, 2020 6:27 am
Forum: Off-Topic
Topic: Dancing radio-waves :)
Replies: 3
Views: 3360

Re: Dancing radio-waves :)

Thanks, I will check that out :)
by JEL
Wed Feb 12, 2020 3:13 pm
Forum: Off-Topic
Topic: Dancing radio-waves :)
Replies: 3
Views: 3360

Dancing radio-waves :)

I caught this short video which I thought was interesting. Not the signal itself, but how it shows the atmospheric movements. A bit like when you watch the sun-light flicker in the water on the beach or a lake. I don't know what the signal itself is, but I'm guessing a radar-beam or something like t...
by JEL
Wed Feb 12, 2020 1:39 pm
Forum: Troubleshooting Help
Topic: Sensitivity issue / antennas
Replies: 3
Views: 2415

Re: Sensitivity issue / antennas

If you can receive signals with a scanner but not the SDR, then you probably need to change some setting in SDR#. There is one called "Sensitivity" (I think that's what it's called. It's one of the first settings and it must be pretty high) When that is not raised sufficiently high then the SDR won'...
by JEL
Wed Feb 12, 2020 1:24 pm
Forum: Antennas
Topic: Question regarding loop designs
Replies: 8
Views: 4284

Re: Question regarding loop designs

To answer my own question, in case others may one day be in a similar situation; I did an experiment, using a loop of 4 turns. Result was good, but did not appear to be better than putting the same antenna up indoors (Of course it's hard to compare directly when doing it over different days, but at ...