Search found 137 matches

by DaveB
Mon Oct 31, 2016 10:14 pm
Forum: SDRplay related
Topic: Signal mirrors all over the band.
Replies: 8
Views: 5540

Re: Signal mirrors all over the band.

In the SP Window click on the ADV button (just to left of the PLAY! button) and check whether the DC/IQ button has been unchecked (dark instead of white). This would be one cause of the mirror signal/DC spike symptoms you report. The centre spike would then cause distortions to centre frequency sign...
by DaveB
Mon Oct 17, 2016 7:34 pm
Forum: SDR Antennas
Topic: Where to get SMA Adapters that are 50 Ohm 2GHz? Do they exist?
Replies: 3
Views: 3516

Re: Where to get SMA Adapters that are 50 Ohm 2GHz? Do they exist?

cosycave.co.uk are worth looking at - how good they are a 2 GHz I wouldn't know.
by DaveB
Mon Oct 17, 2016 7:32 pm
Forum: General
Topic: Would wrapping the unit in AlFoil tape help shield it?
Replies: 9
Views: 6452

Re: Would wrapping the unit in AlFoil tape help shield it?

As F1BJB has done I wrapped my SDRPlay in aluminium foil the day I bought it - and it reduced interference on weak FM signals from the SDRPlay to nothing. I made sure the foil was grounded to the antenna connector - using a small cable tie to pull it tight - and made sure it was not connected to the...
by DaveB
Mon Oct 17, 2016 7:17 pm
Forum: SDR Antennas
Topic: Magnetic Loop Antenna with SDRPlay
Replies: 9
Views: 13548

Re: Magnetic Loop Antenna with SDRPlay

Couldn't a guy just use a 3 foot diameter loop of copper pipe and match the impedance to the SDRplay input with a balun of some description? Yes - I've tried it - it works. Not having any copper tube to hand I used a 10 ft length of RG6 U - fitted f-connectors at each end and used a barrel connecto...
by DaveB
Sat Oct 08, 2016 1:21 pm
Forum: SDRplay related
Topic: will upgrade to 12 bit sdrplay help me?
Replies: 5
Views: 3303

Re: will upgrade to 12 bit sdrplay help me?

I need to correct something in my previous post regarding the S/N ratio that can be achieved with an RTL dongle. I don't know why but running SDR# 1430 I've found that some of my local radio stations are showing S/N ratios up near the 60dB mark without the dongle completely overloading. There are pr...
by DaveB
Fri Oct 07, 2016 7:21 pm
Forum: SDRplay related
Topic: Multiple Bands on SDR Play
Replies: 17
Views: 7944

Re: Multiple Bands on SDR Play

No nvidia card - just the integrated video chip. I opted for a small footprint PC at the beginning of 2015 as in all the years I've had PCs I have only every upped the memory, I have never fitted an expansion card. The PC only has a single expansion slot and if I could squeeze a video card in I'm su...
by DaveB
Fri Oct 07, 2016 6:23 pm
Forum: SDRplay related
Topic: Multiple Bands on SDR Play
Replies: 17
Views: 7944

Re: Multiple Bands on SDR Play

I own a PC with an i5 4460 processor and 8 GB of RAM it cpu benchmark of 6598. With SDR-Console v3 preview I can run five VFO's across an 8 MHz spectrum window - with SDRPlay set to a 10 mbps (10MHz) sample rate. Using the Matrix option I can display all five. In my case I am in the FM broadcast ban...
by DaveB
Tue Oct 04, 2016 11:42 am
Forum: SDRplay related
Topic: will upgrade to 12 bit sdrplay help me?
Replies: 5
Views: 3303

Re: will upgrade to 12 bit sdrplay help me?

A difficult question to answer - but obviously FM stereo needs a far higher S/N ratio to become noise free. I'm currently listening, on headphones, to BBC R3 classical music in 250 kHz bandwidth. According to SDR# the s/n ratio is 54-55 dB and it is practically noise free. An alternative frequency g...
by DaveB
Tue Oct 04, 2016 8:28 am
Forum: New Users' experiences
Topic: SDRPlay Performance
Replies: 17
Views: 7317

Re: SDRPlay Performance

Putting some specific numbers to performance. I own a desktop PC running an i5-4460 processor with 8 Gb RAM and Windows 8.1. With SDRPlay at 8MHZ bandwidth when I run in HDSDR it uses around 16% cpu load according to task manager, with a total cpu load of 22-24%. When I run SDRUno or SDR# CPU usage ...
by DaveB
Thu Aug 04, 2016 1:32 pm
Forum: SDRuno
Topic: Unable to record or playback
Replies: 0
Views: 1928

Unable to record or playback

I don't know what I am doing wrong wrong - but when I click on the record button for the first time it comes up with the error message "unable to open output wav file". The rec button lights up - but that is all. When I click on the play arrow I would expect it to open up a file location a...

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