Search found 5 matches

by Hoshen_Kadosh
Thu Sep 26, 2019 9:42 am
Forum: Antennas
Topic: Bias Tee powerd LNA suggestions
Replies: 1
Views: 329

Bias Tee powerd LNA suggestions

Hi. I currently have a 30m RG-58 coax going to my antenna (Nagoya NL-770S) on my roof. I am mostly using it for Radiosonde reception (400-406Mhz),and because of the long cable and the lose, I would like to add an LNA to the setup. Since I don't have any available power on my roof to power a LNA the ...
by Hoshen_Kadosh
Sun Dec 23, 2018 4:42 pm
Forum: RTL-SDR Discussion
Topic: RTL-SDR Malfunction?
Replies: 7
Views: 8842

Re: RTL-SDR Malfunction?

I have the same problem. tried on multiple computers, and raspberry pi. noting. I contacted RTL SDR blog and they refunded me. i bought another one,the same problem.. so i guess its Malfunction in the recent sdr's that were sold...
by Hoshen_Kadosh
Sat Dec 22, 2018 2:48 pm
Forum: Signal Identification Help
Topic: Unknow signal
Replies: 2
Views: 13162

Unknow signal

471.550MHz, Very strong. what can it be?
recording: https://instaud.io/353R
Image
by Hoshen_Kadosh
Mon Nov 12, 2018 7:18 pm
Forum: Signal Identification Help
Topic: Unknow signal 470.200MHz
Replies: 1
Views: 14514

Unknow signal 470.200MHz

I found out when scanning the spectrum that when an alarm goes off in Israel, an Unknow signal on 470.200MHz apres. what is the type of signal and how I decode it? I now that the system is MOTOROLA MOSCAD-L. but that's all I know. thanks. recording- [url][https://drive.google.com/file/d/14EpcNCEfnyg...
by Hoshen_Kadosh
Sun Sep 09, 2018 10:53 pm
Forum: Off-Topic
Topic: Finding a signal frequency Via type of antena
Replies: 1
Views: 14955

Finding a signal frequency Via type of antena

Hi. i am new to sdr. i am trying to find my local emergency sirens frequency. i know from the manufacturer that it can be either UHF or VHF activation via DTMF codes. now, this is the yagi antenna mounted on the siren its self. dose it Looks like its tuned to UHF or VHF? trying to get a Direction wh...