This is great, thanks. I'm battling noise on my new RTl-SDR V4. I've had the V3 for years, but this one has the up-converter for HF, so much better. My biggest problem is spikes about every 115 KHz from the SPS in the desktop, but think I have a plan to deal with it. Watching this to see if I might. Edit: at 28:00 those faint, repetitive spikes you see are what I've got, although mine are massively worse, and I'm positive it's from the SPS in the desktop. If I plug the dongle into my laptop running SDR++ (I use LInux on both machines), and turn off the desktop, they disappear. I know it's not the 2m USB cable from dongle to computer, because if I disconnect the antenna, no spikes. It's the antenna coax itself where it comes into the house picking it up on the shield, I assume. I've ordered a 6m USB cable that will allow me to get the dongle up on the concrete roof here in Jamaica. Antenna is a sloping dipole about 11m long each side into a 9:1 balun. I get Radio China, Radio Romania, and other distant stations - in Jamaica - quite well every night because the frequencies are between the spikes.
Only with direct sampling, which isn't that great. The V4 has a built-in up converter, but there's a limited supply of them. They're currently in stock, I believe. I had to wait a couple of months from the time I ordered mine on Amazon until I got it. The filtering is much better, too. Quite the nice little unit.
This is great, thanks. I'm battling noise on my new RTl-SDR V4. I've had the V3 for years, but this one has the up-converter for HF, so much better. My biggest problem is spikes about every 115 KHz from the SPS in the desktop, but think I have a plan to deal with it. Watching this to see if I might. Edit: at 28:00 those faint, repetitive spikes you see are what I've got, although mine are massively worse, and I'm positive it's from the SPS in the desktop. If I plug the dongle into my laptop running SDR++ (I use LInux on both machines), and turn off the desktop, they disappear. I know it's not the 2m USB cable from dongle to computer, because if I disconnect the antenna, no spikes. It's the antenna coax itself where it comes into the house picking it up on the shield, I assume. I've ordered a 6m USB cable that will allow me to get the dongle up on the concrete roof here in Jamaica. Antenna is a sloping dipole about 11m long each side into a 9:1 balun. I get Radio China, Radio Romania, and other distant stations - in Jamaica - quite well every night because the frequencies are between the spikes.
Please keep doing this 😎
Thanks for the explaining. Very helpfull.
Kind of amazed you didn't know the RTL-SDR Blog V3 Will tune down to 500khz.
I do, but the version I have only goes down to 28 MHz without a downconverter. I do need to upgrade.
Only with direct sampling, which isn't that great. The V4 has a built-in up converter, but there's a limited supply of them. They're currently in stock, I believe. I had to wait a couple of months from the time I ordered mine on Amazon until I got it. The filtering is much better, too. Quite the nice little unit.