Search found 367 matches

by g1hbe
Tue Sep 11, 2018 3:01 pm
Forum: General
Topic: RSP1 not detecting frequency
Replies: 6
Views: 1075

Re: RSP1 not detecting frequency

Select AM mode and the 6 KHz bandwidth setting. Or wider if there are offsets in use. Also make sure your receive frequency and the displayed LO frequency are NOT the same. If they are you will get weak reception and distortion. This catches out a lot of beginners!
by g1hbe
Mon Sep 10, 2018 7:42 am
Forum: New Users' experiences
Topic: Absolutely Green New User
Replies: 5
Views: 2173

Re: Absolutely Green New User

In the early days of SDRUno frequency entry was KHz only, and entering a VHF frequency ended in strings of zeros. Very awkward. Now you can enter as MHz or KHz. There's a MHz button on the keyboard so you can just enter 95.5 <MHz> and the job is done. For 1530 KHz, just enter 1530 <enter>. People st...
by g1hbe
Wed Sep 05, 2018 11:37 am
Forum: SDRuno
Topic: What's the difference between SDRUno and SAS?
Replies: 2
Views: 746

Re: What's the difference between SDRUno and SAS?

If you are not into serious test & measurement, you won't need the Spectrum Analyser software. Although an SA is basically a radio receiver, the user interface is more suitable for measurement and analysis (with features such as max/min hold etc) than the standard Uno-type software. Actually Uno...
by g1hbe
Tue Aug 28, 2018 7:24 am
Forum: SDR Antennas
Topic: 1/4 wave for 20 meters
Replies: 3
Views: 1780

Re: 1/4 wave for 20 meters

Half waves are high impedance feed so you can get away with no ground. If your RX has a Hi-z antenna port it will match quite well.
by g1hbe
Mon Aug 27, 2018 10:50 pm
Forum: SDR Antennas
Topic: 1/4 wave for 20 meters
Replies: 3
Views: 1780

Re: 1/4 wave for 20 meters

Seventeen feet is about right, but remember you'll need an earth/gnd.
by g1hbe
Mon Aug 27, 2018 7:24 am
Forum: SDRuno
Topic: SDRUno selected tuner/port startup bug with RSPDuo?
Replies: 1
Views: 680

Re: SDRUno selected tuner/port startup bug with RSPDuo?

Sounds like either no-one else has had this problem or no-one knows how to correct it. Try opening a ticket over at the main SDRPlay site. I think it's in the 'support' tab.
by g1hbe
Sun Aug 19, 2018 11:42 pm
Forum: SDRuno
Topic: SDRuno MW/FM Broadcast Notch
Replies: 7
Views: 1482

Re: SDRuno MW/FM Broadcast Notch

If you take a look at the block diagram, you will see that the Hi-z antenna goes in at a much later stage than the A and B ports, bypassing the filters and notches. It's a bit of a mixed bag - it misses out on the filtering and notching, but it's actually a quieter receiver better suited to HF and l...
by g1hbe
Sat Aug 18, 2018 7:37 am
Forum: SDR Antennas
Topic: Mains noise
Replies: 10
Views: 5323

Re: Mains noise

Wow Phil, commiserations on the eye injury. I hope it recovers soon, but I know how slowly eye injuries go and how painful and irritating they can be. Good luck with it.
by g1hbe
Wed Aug 15, 2018 12:47 pm
Forum: SDR Antennas
Topic: ALA1530LN and the tale of four NDB's
Replies: 4
Views: 2349

Re: ALA1530LN and the tale of four NDB's

I wouldn't worry about it, Paul. It is completely counter-intuitive that the loop should receive best when 'edge-on' to the source. Until you start to analyse what's going on with a loop, that is. Then you get one of those 'Ah!' moments and you never look back. Sounds like your Wellbrook is working ...
by g1hbe
Tue Aug 14, 2018 6:52 pm
Forum: SDR Antennas
Topic: ALA1530LN and the tale of four NDB's
Replies: 4
Views: 2349

Re: ALA1530LN and the tale of four NDB's

Me again, sorry.
Don't forget the main responses of the Wellbrook are 'off the edges', with a hole going through the centre of the loop.

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