Search found 9 matches

by Hampstershorts
Mon Jun 08, 2020 5:44 pm
Forum: RTL-SDR Discussion
Topic: RTL-SDR Blog ADS-B LNA amplification differences
Replies: 3
Views: 1089

Re: RTL-SDR Blog ADS-B LNA amplification differences

Username wrote:
Mon Jun 08, 2020 5:04 pm
http://stores.ebay.com/gpiolabs/ get one here.
Well honestly the RTL-SDR unit is better than any of those. Way better filtering. And I’d rather figure out if the one I have is not working correctly so I can get it replaced.

But I appreciate the suggestion if all else fails.
by Hampstershorts
Sun Jun 07, 2020 7:40 pm
Forum: RTL-SDR Discussion
Topic: RTL-SDR Blog ADS-B LNA amplification differences
Replies: 3
Views: 1089

RTL-SDR Blog ADS-B LNA amplification differences

I have 2 of the RTL-SDR ADS-B LNAs. One is a few years old. The other I purchased recently within a couple weeks of it going out of stock. I wanted to confirm that the new one is working so I swapped it with my old one. The new version is showing a lot less amplification than the old one. I am runni...
by Hampstershorts
Mon Sep 17, 2018 5:05 pm
Forum: User Projects
Topic: Potting ADS-B LNA
Replies: 4
Views: 18264

Re: Potting ADS-B LNA

I had thought about a waterproof enclosure to be sure. I live on the Canadian prairies and as such we get pretty wild weather swings. I would be concerned about issues such as condensation, as the box wouldn’t be airtight. I’ve heard lots of stories about airtight enclosures being opened and having ...
by Hampstershorts
Sat Sep 15, 2018 6:24 am
Forum: User Projects
Topic: Potting ADS-B LNA
Replies: 4
Views: 18264

Potting ADS-B LNA

I’m wondering if anyone on here has attempted to seal the ADS-B LNA/filter in potting compound to weatherproof it. Does anyone have any experience with any potting compounds for an application like this?

Thanks.
by Hampstershorts
Fri Sep 14, 2018 4:20 am
Forum: Troubleshooting Help
Topic: V3 Bias Tee won't turn off on Raspbian Stretch
Replies: 9
Views: 8638

Re: V3 Bias Tee won't turn off on Raspbian Stretch

I did some more checking tonight. The LNA is definitely getting power. I removed an end panel and the LED on the inside is lighting up. I also plugged the dongle into an iMac and a headless BSD system I have, and both times the bias tee came on as soon as it was plugged into the USB port. It would s...
by Hampstershorts
Fri Sep 14, 2018 2:58 am
Forum: Troubleshooting Help
Topic: V3 Bias Tee won't turn off on Raspbian Stretch
Replies: 9
Views: 8638

Re: V3 Bias Tee won't turn off on Raspbian Stretch

I will do some more investigations tonight. I am using whatever driver is installed in the current version of the PiAware SD card image. I don’t know specifically what one that is. Is there a way for me to enumerate that from the command line? As an aside I also tried it on a RPi that just has the c...
by Hampstershorts
Thu Sep 13, 2018 3:05 pm
Forum: Troubleshooting Help
Topic: V3 Bias Tee won't turn off on Raspbian Stretch
Replies: 9
Views: 8638

Re: V3 Bias Tee won't turn off on Raspbian Stretch

I unplugged the V3 dongle from the RPi, shorted the SMA connector and verified it was reading 0v with a multimeter. I then plugged it into a running RPi running Raspbian Stretch. I measured the SMA connector without doing anything else and saw 4.5v across it. I then ran your bias tee software using ...
by Hampstershorts
Thu Sep 13, 2018 12:58 pm
Forum: Troubleshooting Help
Topic: V3 Bias Tee won't turn off on Raspbian Stretch
Replies: 9
Views: 8638

Re: V3 Bias Tee won't turn off on Raspbian Stretch

I am pretty sure the LNA is being powered off the bias tee. If your ADS-B LNA isn’t receiving any power from the bias tee will any signal pass through it? I’ll short the SMA connector and test it again. As for drivers I’m using either stock Raspbian Stretch with the blacklists as you see above, or t...
by Hampstershorts
Thu Sep 13, 2018 4:26 am
Forum: Troubleshooting Help
Topic: V3 Bias Tee won't turn off on Raspbian Stretch
Replies: 9
Views: 8638

V3 Bias Tee won't turn off on Raspbian Stretch

Hi there, I just ordered a V3 dongle to use in an ADS-B setup along with the ADS-B LNA and Filter. Long story short is I would like to test different setups, with and without the LNA, but the Bias Tee on my V3 dongle will not turn off. No matter what I do I always have 4.5VDC on the SMA port. I have...