Search found 49 matches

by phil
Sun May 12, 2019 12:25 am
Forum: Troubleshooting Help
Topic: RTL-SDR Wideband LNA
Replies: 2
Views: 554

Re: RTL-SDR Wideband LNA

The Discone is grounded to the same earth stake as the other antennas mentioned. I've since pulled it down and packed it away. I think i'm lucky that only the LNA units were damaged and not my more expensive SDRs. Looking at the price of the SPF5189Z chips, it's not worth replacing them. I have no i...
by phil
Fri May 10, 2019 10:54 am
Forum: Troubleshooting Help
Topic: RTL-SDR Wideband LNA
Replies: 2
Views: 554

RTL-SDR Wideband LNA

My second LNA has now failed. Strange thing is, it's only started happening since i connected them to a discone! They both ran quite happily on custom 150MHz Dipole, 450 MHz 1/4 wave and 1090 MHz 1/4 wave antennas. Any thoughts on what is happening? My theory is that the the discone is wideband enou...
by phil
Wed May 01, 2019 5:32 am
Forum: Troubleshooting Help
Topic: About heat
Replies: 2
Views: 528

Re: About heat

It is quite normal for the unit to get very hot depending on what you are using it for.
by phil
Sun Apr 14, 2019 12:08 am
Forum: Signal Identification Help
Topic: Strange Beacon type Signal at 453.349 MHz
Replies: 1
Views: 555

Re: Strange Beacon type Signal at 453.349 MHz

Looks like SCADA to me.
by phil
Sat Feb 16, 2019 11:29 pm
Forum: Other SDR Devices
Topic: Check out the specs on THESE receivers!
Replies: 2
Views: 4927

Re: Check out the specs on THESE receivers!

According to a 2013 RR post the 40GHz unit was $60,000 USD. I'll have to check down the back of the couch, but i don't think i will be getting one this year.
by phil
Mon Feb 04, 2019 6:52 am
Forum: User Projects
Topic: Spare Aluminum Metal Enclosure
Replies: 1
Views: 14383

Re: Spare Aluminum Metal Enclosure

I have a couple i used for the LNA4ALL unit. Measurements are in this post: viewtopic.php?f=5&t=2367&p=8852&hilit=cases#p8838
by phil
Fri Jan 11, 2019 7:23 am
Forum: Antennas
Topic: diy biquad for inmarsat
Replies: 5
Views: 14790

Re: diy biquad for inmarsat

Cheers, i've had no issues receiving the audio since Jonti released the last version. The main reason i wanted to try another antenna was to try and see if i can increase the signal strength for roughly 12 or so hours that the sat wanders further north of the equator and signals are next to non exis...
by phil
Thu Jan 10, 2019 6:28 am
Forum: Antennas
Topic: diy biquad for inmarsat
Replies: 5
Views: 14790

Re: diy biquad for inmarsat

That's exactly what i was after and then some, very comprehensive..thank you. I'm about as far south of the equator as 4 F1 gets and the patch does a fair job, looking forward to trying this.
by phil
Wed Jan 09, 2019 2:05 am
Forum: Antennas
Topic: diy biquad for inmarsat
Replies: 5
Views: 14790

Re: diy biquad for inmarsat

Great job! I have the same dish but running the patch antenna. Could you post some dimensions and maybe a straight on shot of the solder join? Thanks.