Search found 124 matches

by JEL
Mon Oct 22, 2018 6:53 pm
Forum: Troubleshooting Help
Topic: Reception problem nearby signals
Replies: 9
Views: 5367

Re: Reception problem nearby signals

Do you have "filter audio" (in the audio-tab) ON ? It may not be related to your issue, but I sometimes run into similar problems when I have "filter audio" OFF. The problem for me is that the carrier (from nearby aircraft) can get so strong it overloads and kills the audio. With "filter audio" ON, ...
by JEL
Fri Oct 19, 2018 6:15 pm
Forum: Antennas
Topic: LNA for stock antennas
Replies: 5
Views: 16901

Re: LNA for stock antennas

Do you think that 88-108 Fm trap could help or is it useless in my case? That thing you WANT! :) When I got that myself it made a HUGE difference (improvement) I wish there were more filters available actually. BCFM is only 1 annoying band. There are also other digital broadcast-bands that are quit...
by JEL
Tue Oct 16, 2018 12:26 pm
Forum: Troubleshooting Help
Topic: SDR sharp stops playing radio after about a second
Replies: 8
Views: 4708

Re: SDR sharp stops playing radio after about a second

Does SDR# actually freeze (all graphics stop moving) or is it the sound that disappears (graphics still moving but no sound heard) ? If SDR# completely freezes, then try to start it and leave it at the empty frequency for some time. If it freezes there as well, then my guess is it's a USB problem (T...
by JEL
Mon Oct 15, 2018 4:18 pm
Forum: Signal Identification Help
Topic: wireless guitar-amp
Replies: 2
Views: 13913

Re: wireless guitar-amp

Just an update: So the signal tops around 120 MHz. It can be found as low as 30 MHz (very faint) and as high as 200 MHz (very faint) The main strength sits between 75 to 165 MHz. There are no stronger signal-spikes than those that appear in the airband. All the spikes are spaced 1 MHz apart from eac...
by JEL
Mon Oct 15, 2018 3:35 pm
Forum: Antennas
Topic: Antenna combiner
Replies: 8
Views: 20198

Re: Antenna combiner

I cam across this: https://www.dxengineering.com/parts/dxe-rsc-2 I wonder if there is a circuit since this item is about $80. I read it as being useful only if used with an antenna-system which is in phase, such as this setup (2 wires, same length, same position, same everything basically): https:/...
by JEL
Sat Oct 13, 2018 1:49 pm
Forum: Signal Identification Help
Topic: wireless guitar-amp
Replies: 2
Views: 13913

wireless guitar-amp

I think I just got hit by a wireless guitar-amp system (probably used by a neighbor) It splattered at regular freq-intervals from at least 78 MHz to 160 MHz (I didn't have enough time to search further before it stopped) I don't know what the actual broadcast-freq might have been (if it IS in fact a...
by JEL
Fri Sep 28, 2018 6:56 pm
Forum: Signal Identification Help
Topic: Qi wireless charging
Replies: 4
Views: 15940

Re: Qi wireless charging

Further update: Apparently it is not the wireless charger that cause problems :( I had a disconnect again even when it was OFF. I'm leaning toward it being due to neighbor-interference instead. They have been doing a lot of construction work in the room (a bedroom) just above where the SDR and anten...
by JEL
Thu Sep 27, 2018 11:29 pm
Forum: Antennas
Topic: Antenna combiner
Replies: 8
Views: 20198

Re: Antenna combiner

I tried something similar, but with only 2 antenna-inputs. It halfway worked, but not without issues. The problem, simply put, is that the signals from the multiple inputs are mixed together and thus can null each other out on some frequencies. So you may degrade reception. But on frequencies where ...
by JEL
Thu Sep 27, 2018 11:16 pm
Forum: Signal Identification Help
Topic: Qi wireless charging
Replies: 4
Views: 15940

Re: Qi wireless charging

Update: It seems it was indeed interference from one of the wireless chargers that was the cause of the trouble. I took one charger out of service for the day, and so far there has been no problems running the SDR. (It's just one day of testing, so obviously a thin basis to really conclude anything ...
by JEL
Wed Sep 26, 2018 1:28 pm
Forum: Signal Identification Help
Topic: Qi wireless charging
Replies: 4
Views: 15940

Re: Qi wireless charging

Is the charger connected to your PC? It might just be that it's taking too much power away from the RTL-SDR and Airspies? The signal in the video turns out NOT to be related to the chargers. I don't know where that signal came from, but my guess currently is that it's a neighbor's TV (I base that o...