Архив за 17.09.2019

Best HackRF clone that works with Portapack?

Anyone experimented with any of these clones that are portapack compatible?

Looking for recommendations/known issues.

Thanks!

submitted by /u/0xffx0
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Is anyone running mlrpt on a raspberry pi?

I've been trying to get mlrpt (http://www.5b4az.org/) running on my raspberry pi but its not saving any images. I'll use a command like mlrpt -s 0609-0625 -t 20 but the logs always just end with

``` mlrpt: Decoding of LRPT Images Started mlrpt: PLL Unlocked mlrpt: Operation Timer Expired mlrpt: Receiving and Decoding Ended

`` I thought the "Operation Timer Expired" bit might be due to the "duration" argument being too short, but no matter how long I set the-t` flag for, it's the same. What am I doing wrong?

submitted by /u/pgcudahy
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What is SDR and does Bluetooth count as RTL SDR?

submitted by /u/expericonatus
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Advice on learning about radio transmitters

Where can I learn how to design my own radio transmitter? I don't mean to use it, I just want to have enough knowledge so I could.

submitted by /u/KingJellyfishII
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Comment on Testing a PCB Patch Antenna and Radiosonde QFH Antenna for Inmarsat and Iridium Reception by Adam

A very good video showing how NOT to use the QFH antenna. Your coax leads should be as short as possible. You should solder the center of the coax directly to the antenna bottom and shield to the ground at the very same place.

Which antenna to get for GOES rx?

Hey guys,

I am buying up equipment for fetching GOES data and was wondering what antenna to get.

I was looking at this one:

https://www.excel-wireless.com/1700-2100-mhz-antenna-grid-parabolic-antenna/1710-2170mhz-grid-paraboilc-dish-antennas-19-dbi#datasheet

The tutorial suggests this one:

https://www.excel-wireless.com/1900-mhz-grid-parabolic-antenna/1850-1990-mhz-grid-parabolic-antenna-20-dbi

There isn't much price difference between them, but was wondering if the 1710Mhz antenna might be better?

submitted by /u/hemna
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KerberosSDR • Re: Feature requests / development ideas

Is it possible to get the schematic for the KSDR? or at the very least could you tell me the part number for U2 on the PCB? thanks.

Statistics: Posted by Bigtwig — Tue Sep 17, 2019 5:40 pm


RTL-SDR Discussion • Re: Meteor Image

Nothing. I have the antenna about 12 feet above the ground with closest building (my house) about 400 yards away. Antenna is basically in a field with no trees around for at least 600 yards.

Statistics: Posted by njrusty — Tue Sep 17, 2019 4:21 pm


RTL-SDR Discussion • Re: Meteor Image

Antenna location and sky view? Is a neighbors house or something like that blocking the antenna's view to the north?

Statistics: Posted by K3RLD — Tue Sep 17, 2019 4:18 pm


RTL-SDR Discussion • Meteor Image

I've built a homemade QFH and tested this morning with first Meteor image. Previous V-dipole only obtained image from directly over my house and south. Now with the QFH, I am getting an image slightly north of my location (see below) but still just mostly south of my location (PA).

Can anyone explain why I'm not obtaining images north of my marked location??
test.jpg

Statistics: Posted by njrusty — Tue Sep 17, 2019 3:39 pm


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