Search found 241 matches

by g1hbe
Sat Oct 29, 2016 8:50 pm
Forum: SDRplay related
Topic: Signal mirrors all over the band.
Replies: 8
Views: 3571

Re: Signal mirrors all over the band.

Have you tried choosing another converter LO setting? If these FM stations won't go away no matter what you do, an outboard FM rejector is the only answer.
by g1hbe
Fri Oct 28, 2016 7:36 pm
Forum: General
Topic: AM broadcast stations on evry band to 30 MHz?!
Replies: 11
Views: 4139

Re: AM broadcast stations on evry band to 30 MHz?!

The LNA and AGC buttons can be found in the 'main' window (the one that has the PLAY button). The gain slider is also in there.
by g1hbe
Fri Oct 28, 2016 2:08 pm
Forum: General
Topic: AM broadcast stations on evry band to 30 MHz?!
Replies: 11
Views: 4139

Re: AM broadcast stations on evry band to 30 MHz?!

I wonder if your SDR is overloading due to strong signals on MW(AM)? Try turning off the LNA and the AGC, then adjust the gain with the slider. Failing that, an outboard filter which rolls off sharply below 1.8 MHz should do it.
by g1hbe
Mon Oct 17, 2016 7:36 am
Forum: SDR Antennas
Topic: Where to get SMA Adapters that are 50 Ohm 2GHz? Do they exist?
Replies: 3
Views: 2102

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

The difference between 50r and 75r is tiny and doesn't matter at all on RX. I use 75-ohm satellite cable for most of my receive system because it is cheap, low loss and easy to work with.
by g1hbe
Tue Oct 11, 2016 5:31 pm
Forum: SDR Antennas
Topic: RA0SMS Miniwhip bad performance on SDRPlay
Replies: 31
Views: 10435

Re: RA0SMS Miniwhip bad performance on SDRPlay

Have you tried some basic fault-finding, such as checking whether the supply voltage is reaching the unit?
by g1hbe
Mon Oct 10, 2016 8:31 am
Forum: General
Topic: What is on everyone's SDRplay V2.0 wish list?
Replies: 13
Views: 6053

Re: What is on everyone's SDRplay V2.0 wish list?

The only one that springs to mind is much-improved front-end filtering. The images of FM and DAB that 'get in the way' are numerous, wspecially around the 250 MHz satellite band. External filters can get around this, but it's messy. Some tight up-front filters would be most welcome. Oh, and two sepa...
by g1hbe
Wed Oct 05, 2016 10:25 pm
Forum: General
Topic: Airband
Replies: 7
Views: 3111

Re: Airband

I have no images, but very low signal on airband. Im using a Airband vertical antenna 5/8. On my single RTL, the airband signal is great, bur on sdr-play is poor. That's strange. I listen to airband occasionally and find the RSP just as good as my AR5001d receiver, in fact it can be better as I can...
by g1hbe
Thu Sep 22, 2016 8:27 am
Forum: General
Topic: Airband
Replies: 7
Views: 3111

Re: Airband

The SDRPlay has good sensitivity across its coverage. Its weakness is image responses, usually in the form of unwanted FM broadcast and DAB appearing at unexpected places. It's due to the conversion regime. Try selecting a different conversion frequency from the advanced menu, this might clear it. I...
by g1hbe
Mon Sep 05, 2016 11:38 pm
Forum: SDRplay related
Topic: FM stations appearing in many bands
Replies: 4
Views: 2247

Re: FM stations appearing in many bands

Some of the unwanteds are due to the conversion oscillator (just like a normal superhet), but others a traceable back to harmonics of the sampling frequencies. Sometimes you can make an unwanted response shift out of the way by moving the centre frequency (I guess this moves the LO frequency), but o...
by g1hbe
Mon Sep 05, 2016 11:14 am
Forum: SDRplay related
Topic: FM stations appearing in many bands
Replies: 4
Views: 2247

Re: FM stations appearing in many bands

John This is a known phenomenon with the SDRPlay, as it is with other types of SDR. There is no way around it except by using an Band 2 rejector filter in the antenna feed. You may be able to move the FM responses out of the way by choosing a different sampling rate or another LO frequency (look und...

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