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by g1hbe
Mon Jan 02, 2017 2:12 pm
Forum: SDRuno
Topic: Change default filter bandwidths?
Replies: 2
Views: 1640

Re: Change default filter bandwidths?

Please forgive my curiosity, Dave - I'm wondering what you might be listening to to require such a narrow b/w for FM. It would indicate a peak dev of no more than around 1.3 KHz, which is very thin for FM! Normally the accepted minimum for PMR etc is 2.5 KHz dev in a 12.5 KHz spacing, and UKFM CB us...
by g1hbe
Mon Jan 02, 2017 1:58 pm
Forum: General
Topic: Poor RX Signals on the RSP2
Replies: 8
Views: 3888

Re: Poor RX Signals on the RSP2

That all sounds very srange, Marty. I have an RSP2 and I find it really quite clean. There are images, but none of them is bad enough to cause a major issue and most of them can be easily moved out of the way by retuning. Don't forget that on both SMA ports you can switch in a MW(BC) rejection filte...
by g1hbe
Sun Jan 01, 2017 11:34 pm
Forum: General
Topic: Does anyone's RSP 2 work perfectly
Replies: 6
Views: 4100

Re: Does anyone's RSP 2 work perfectly

I can't see a problem with the plastic case. It has a metallic coating on the inside so it is just as well screened as the more expensive Pro version. As most of us use our RSP's in a safe environment and don't hit them with hammers or throw them against the wall I reckon there's nothing to be gaine...
by g1hbe
Sat Dec 31, 2016 11:04 pm
Forum: SDRuno
Topic: span adjustment on SDRuno 1.12
Replies: 6
Views: 2970

Re: span adjustment on SDRuno 1.12

Yes, the full range of spans is only available when in 'zero IF' mode. But I don't think I've ever seen a 64k span in any mode, I'll have to have a look later. Is your setup behaving in a sensible manner now?
by g1hbe
Fri Dec 30, 2016 8:59 pm
Forum: SDRuno
Topic: span adjustment on SDRuno 1.12
Replies: 6
Views: 2970

Re: span adjustment on SDRuno 1.12

Hi Tom That's a very narrow span for the RSP1 and Uno, unless you have somehow got into 'zoom' mode. First of all, set the Sample Rate to 2 MHz and the Decimation to 1 (both these settings are in the small MAIN window). This should give a visible span of about 2 MHz. If it is much narrower than this...
by g1hbe
Thu Dec 29, 2016 2:31 pm
Forum: General
Topic: DAB with SDRplay
Replies: 3
Views: 2546

Re: DAB with SDRplay

I may be wrong about this, but I suspect SDRPlay (the company) is not allowed to fiddle with the Mirics DAB or TV software.
by g1hbe
Thu Dec 29, 2016 11:45 am
Forum: SDR Antennas
Topic: Balun needed for coax fed dipole on hi-z port?
Replies: 4
Views: 5350

Re: Balun needed for coax fed dipole on hi-z port?

That's about right. On a coaxial feedline which is relatively short, you can take the coax straight into the Hi-Z input. You may get slightly more signal with a 9:1 balun, but if you can see background noise when you plug the aerial in there's not much point in 'more signal' as the noise will come u...
by g1hbe
Mon Dec 26, 2016 11:13 am
Forum: New Users' experiences
Topic: Can't go above 1.5Mhz bandwidth or choppy audio
Replies: 4
Views: 3186

Re: Can't go above 1.5Mhz bandwidth or choppy audio

Strange. I run my RSP2 with SDRUno on my 'shack laptop' without any problem at all SR's and decs. The laptop is a secondhand Win 8 enterprise machine with an i3-3110m processor (2 core) at around 2.4 GHz with 4 Gig of RAM and SDRUno coasts along without any significant CPU loading (maybe 15% tops wh...
by g1hbe
Sat Dec 24, 2016 12:11 pm
Forum: General
Topic: SAQ Christmas Transmission with RSP1
Replies: 2
Views: 2074

Re: SAQ Christmas Transmission with RSP1

I actually remembered to listen this year! Nothing for the first 20 mins or so, then I started hearing 'VVV de SAQ', very weak. I suspect my Wellbrook loop is well below optimum performance at such a low frequency, but the noise on my homebrew mini-whip is way too high to copy weak signals.
by g1hbe
Fri Dec 23, 2016 9:51 am
Forum: New Users' experiences
Topic: High noise floor on RSP2??
Replies: 5
Views: 3953

Re: High noise floor on RSP2??

Is the noise level high with or without the antenna connected? Is this on input A, B or Hi-z? Which software are you using. HDSDR and SDR# do not read absolute values (or they didn't last time I used them). SDRUno gives a real -dBm reading. Here is what my RSP2 shows: Ant: Hi-z, but no antenna conne...

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