Search found 21 matches

by Airwind
Mon Dec 17, 2018 8:20 am
Forum: Off-Topic
Topic: More fake units sold on Ebay
Replies: 12
Views: 3059

Re: More fake units sold on Ebay

We've tried issuing takedowns on from Aliexpress and eBay, but as soon as you take one down, three more listings pop up in it's place. Are there not any automated options available that scan for similar products and issue automatic takedown notices? I hear the anti-piracy orgs use a lot of them for...
by Airwind
Mon Dec 10, 2018 1:39 pm
Forum: Signal Identification Help
Topic: Signal Identification Help
Replies: 8
Views: 2012

Re: Signal Identification Help

What exactly is the transmitter for the given signal? The central station or the vehicle itself?
Because if the vehicle is the transmitter then naturally one would expect the signal strength to change as the vehicle travels around.
by Airwind
Mon Nov 05, 2018 8:24 am
Forum: User Projects
Topic: Trying to open my weird Garage with radio at 434Mhz
Replies: 1
Views: 921

Re: Trying to open my weird Garage with radio at 434Mhz

I haven't experimented with garage doors yet, but does your system happen to use a rolling code (does the transmitted signal change each time you hit the button on the remote)? If not, try adjusting the timings a bit. I have done some tests with a doorbell and certain remote power switches - some of...
by Airwind
Thu Oct 11, 2018 8:51 pm
Forum: Signal Identification Help
Topic: Unknow signal
Replies: 9
Views: 2575

Re: Unknow signal

Wait, what signal are we talking about here?
I assumed it was the strong curvy white one on the waterfall.
Because the waterfall Remon posted seems different although they do seem to sound similar.
by Airwind
Wed Oct 10, 2018 10:39 am
Forum: Signal Identification Help
Topic: Unknow signal
Replies: 9
Views: 2575

Re: Unknow signal

That signal looks screwed. I don't see any data in it unless it's some weird wideband modulation, but why the hell does it jump all around like that and it seems to be poorly filtered? Looks as if some device is constantly restarting itself at irregular intervals.
by Airwind
Tue Oct 09, 2018 8:31 pm
Forum: Antennas
Topic: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+
Replies: 14
Views: 3543

Re: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+

Yo, are you maybe selling these on ebay too?
The paypal button is kind of broken for me on tindie, and I'm not brave enough to share the credit card data.
by Airwind
Tue Oct 09, 2018 9:48 am
Forum: RTL-SDR Discussion
Topic: Custom 400-406 MHZ bandpass filter?
Replies: 3
Views: 1040

Re: Custom 400-406 MHZ bandpass filter?

As an entry-level RF enthusiast I've tried to build my own filters, but I was told that it's much better to just buy already made filters instead because they are going to be of much better quality than anything I'm ever going to come up with. If you're into filters and want to learn stuff then sure...
by Airwind
Fri Sep 28, 2018 11:33 am
Forum: Off-Topic
Topic: Where do you buy these tiny aluminum enclosures?
Replies: 32
Views: 7008

Re: Where do you buy these tiny aluminum enclosures?

Hello! Thanks, I also received them recently, but I noticed a few differences. The current enclosures have a shiny surface; previous batch had a matte finish They're unbranded (no logo printed on the surface) There are only 2 screw holes available on the side panels compared to 4 in the previous bat...
by Airwind
Wed Sep 26, 2018 5:33 am
Forum: Signal Identification Help
Topic: Unknown high pitch continues beep with data bursts
Replies: 3
Views: 1449

Re: Unknown high pitch continues beep with data bursts

I've seen this type of signal too. It just beeps for most of the time and occasionally there are some data bursts on it. Mine was near 434 MHz though (south Europe). No idea what it is for.
by Airwind
Mon Sep 10, 2018 8:33 pm
Forum: Signal Identification Help
Topic: Splatter, noise or ? 450.675 MHz
Replies: 3
Views: 1260

Re: Splatter, noise or ? 450.675 MHz

Probably not. The restaurant pagers seem to ping randomly and are not associated with any periodic pattern. This makes sense because customers will have their food prepared at different time intervals (delays). Finally you can probably correlate the frequency of pings with the number of customers in...