Search found 242 matches

by g1hbe
Fri Oct 06, 2017 6:04 pm
Forum: SDR Antennas
Topic: Antenna's
Replies: 4
Views: 1128

Re: Antenna's

There's no DC present on the output of the interface boxes that come with active antennas. There's a DC blocking capacitor that stops any voltage appearing there.
by g1hbe
Thu Oct 05, 2017 4:12 pm
Forum: SDRuno
Topic: Antenna Length.
Replies: 2
Views: 530

Re: Antenna Length.

The wavelength at 1000 MHz (near enough) is 30 cm. For a quarter-wave groundplane, the length of the vertical element would be 30/4 = 7.5 cm. For a dipole, each leg would be 7.5 cm.
by g1hbe
Tue Sep 26, 2017 9:14 pm
Forum: New Users' experiences
Topic: RSP-2 with TS590SG
Replies: 7
Views: 845

Re: RSP-2 with TS590SG

I would say it's normal to see a strong signal on your TX frequency. If you have 100 watts going out and a sensitive receiver at the same location (even without an antenna connected), I'd say it was inevitable. I can't explain why you saw no signal before though.
by g1hbe
Mon Sep 25, 2017 11:14 pm
Forum: SDRplay related
Topic: RSP-1 as a bat receiver?
Replies: 3
Views: 733

Re: RSP-1 as a bat receiver?

I've built a few bat detectors and the difficulty is always the transducer. Some electret mics will reach up to about 20+KHz but most bats operate above this. Then there are the cheap 40KHz transducers that work well but their response is quite narrowband and they only pick up in the range of maybe ...
by g1hbe
Sat Sep 23, 2017 2:38 pm
Forum: SDRuno
Topic: SDRuno freezes
Replies: 7
Views: 943

Re: SDRuno freezes

A similar problem is mentioned in this thread: There seems to be a small bug in the antenna switching or gain control sections which can cause an 'out of range' error and a freeze. I believe the good chaps are looking into it and will sor...
by g1hbe
Sat Sep 23, 2017 9:25 am
Forum: New Users' experiences
Topic: SDRuno Frustration
Replies: 4
Views: 1343

Re: SDRuno Frustration

The more time you spend with SDRUno the easier it gets, but I agree that some of the controls and settings are buried in places where you would not expect them. I think it would a big help to have the program initially start up with a ready-made screen layout so that new users wouldn't have to start...
by g1hbe
Mon Sep 18, 2017 8:18 am
Forum: SDRuno
Topic: Ideas for future Updates
Replies: 19
Views: 2046

Re: Ideas for future Updates

I'd just like to repeat my plea for separate MHz & KHz buttons. Entering everything as KHz is very confusing, especially when you get to VHF and above! So to be able to enter (say) 60 KHz using the KHz key and 456.123 MHz using the MHz key would be a Godsend. My Signal Hound uses this method - y...
by g1hbe
Sun Sep 17, 2017 10:10 am
Forum: SDRplay related
Topic: RSP-2 antenna select via Device Control Panel?
Replies: 10
Views: 1514

Re: RSP-2 antenna select via Device Control Panel?

In my case it goes like this: Start SDRUno from cold. Press PLAY Enter (say) 450 MHz and select Ant A. Now press the 160m band button then select Hi-z. This more often than not causes reception to stop and the waterfall just shows vertical lines. Pressing STOP then PLAY corrects it and reception car...
by g1hbe
Tue Sep 12, 2017 9:51 am
Forum: SDRuno
Topic: Only half of SP1 spectrum displayed
Replies: 4
Views: 707

Re: Only half of SP1 spectrum displayed

I'm glad you've found it, Hugo. I was wracking my brain to think of what it might be but got nowhere!
by g1hbe
Sun Sep 10, 2017 8:48 am
Forum: General
Topic: Seeing spectrum of UHF (HDTV) Broadcast Band
Replies: 5
Views: 1202

Re: Seeing spectrum of UHF (HDTV) Broadcast Band

As you suspect, you could see only 10 MHz at a time. There's not a lot to see with digital TV, just 'blocks' of what looks like noise. Looking at analogue TV signals used to be quite interesting as you could pick out the main video signal, the chroma subcarrier and the sound channel.

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