Search found 203 matches

by DanubeBCL
Tue Aug 01, 2017 7:41 am
Forum: New Users' experiences
Topic: DRM reception with SDRPlay and SDRUno
Replies: 12
Views: 50995

Re: DRM reception with SDRPlay and SDRUno

Also consider: Select VB Cable output as a signal input source in soundcard selection of Dream. Select your loudspeaker under audio output of Dream. Be careful not to mix up the soundcards here. Otherwise a loopback may occur and Dream listens to it's own output which makes decoding impossible. Both...
by DanubeBCL
Thu Jul 20, 2017 4:21 pm
Forum: SDR Antennas
Topic: RA0SMS active mini-whip power supply
Replies: 10
Views: 36020

Re: RA0SMS active mini-whip power supply

is there possibly a difference between your power supplies in a way that one 'passes' the ground to the mini-whip power adaptor, and the other doesn't? I also have already thought of such a scenario. But Paul's bias T has an isolating transformer in the RF path. This should reduce the influence of ...
by DanubeBCL
Wed Jul 19, 2017 5:31 pm
Forum: SDR Antennas
Topic: RA0SMS active mini-whip power supply
Replies: 10
Views: 36020

Re: RA0SMS active mini-whip power supply

just a bit puzzled. Me too, Paul. The linear PSU should not have an influence on the signals. Difficult to say, why it has. But I wouldn't worry. If your switched PSU is OK then use it. Yes, I know the trouble with the "overhead" power lines. I do not have high voltage lines here, but our old house...
by DanubeBCL
Wed Jul 19, 2017 4:51 pm
Forum: SDR Antennas
Topic: RA0SMS active mini-whip power supply
Replies: 10
Views: 36020

Re: RA0SMS active mini-whip power supply

Hi Paul,
I can't explain. Normally there should be no such difference, except that the "bench" PSU should create no noise (if it's linear).
What is the difference you noticed? More noise? Weaker signals? More "ghost" signals (intermodulation)?
What brand/type is the "bench" PSU?
73s Heinrich
by DanubeBCL
Sun Jul 16, 2017 7:15 am
Forum: General
Topic: rsp1 drivers
Replies: 4
Views: 13884

Re: rsp1 drivers

I am not sure if I understood what you did, Ross.
rtl1090 is for RTL dongles. I did not know that rtl1090 supports RSP now.
Shouldn't you use dump1090 which has RSP support?
Could it be (just a guess) that you ran Zadig and inadvertently installed the RTL drivers for the RSP USB device?
73, Heinrich
by DanubeBCL
Fri Jul 07, 2017 5:28 pm
Forum: Code Corner
Topic: HDSDR, Omnirig and 3 radios
Replies: 2
Views: 14311

Re: HDSDR, Omnirig and 3 radios

I think the best way would be to ask Alex Shovkoplyas if he is willing to release an official 3-receiver version of Omnirig. Then all software authors could update to a standardised API interface. It makes no sense IMHO for the HDSDR authors to adapt their code for an Omnirig version which only exis...
by DanubeBCL
Fri Jul 07, 2017 6:53 am
Forum: SDRplay related
Topic: SDRplay as panadapter on SHF bands
Replies: 2
Views: 9459

Re: SDRplay as panadapter on SHF bands

I am afraid this problem can only be solved when all involved softwares transfer their frequency number formats from signed 32bit integers to unsigned 32bit or better 64bit numbers. This problem is present in many softwares. The signed 32bit value overflows to negative when it exceeds 2147483647 and...
by DanubeBCL
Wed Jul 05, 2017 10:43 am
Forum: SDR Antennas
Topic: Bias T and active mini-whip
Replies: 15
Views: 54216

Re: Bias T and active mini-whip

from my serviceable (switched) 12v/1200ma half-brick to the 13.8V/5-7Amp more sophisticated unit? Generally switched PS are not very much loved by radio amateurs. They cause high RF noise which is spreading all over the power lines in the house and beyond. I have several neighbours in appr. 80 m di...
by DanubeBCL
Wed Jul 05, 2017 10:30 am
Forum: General
Topic: interference problems
Replies: 5
Views: 14976

Re: interference problems

Hm, I only can imagine that the RSP and the scanner use the same USB hub and that the overal USB bandwidth is a bottleneck. When the RSP is receiving it "steals" USB bandwidth and the scanner software cannot retrieve enough data in a given timeslot. Also possible could be that the CPU power is not e...
by DanubeBCL
Wed Jul 05, 2017 6:50 am
Forum: SDR Antennas
Topic: Bias T and active mini-whip
Replies: 15
Views: 54216

Re: Bias T and active mini-whip

the RA0SMS mini-whip is now mounted on an 8M non-conductive mast with the coax grounded Hi Paul, that's how it is recommended. Quote of PA3FWM (the creator of the famous Twente WebSDR) on "Grounding of MiniWhip and other active whip antennas": What can be done to improve the situation? Firstly of c...