Search found 160 matches

by DanubeBCL
Fri May 19, 2017 7:20 am
Forum: SDR Antennas
Topic: RA0SMS Miniwhip bad performance on SDRPlay
Replies: 28
Views: 6181

Re: RA0SMS Miniwhip bad performance on SDRPlay

Sorry, but modifications of the bias T do not compensate the design of all the rest. Chris Trask (among others) has built several whip amplifiers and recommends (among other designs) an input stage which has an active current sink as a load resistor. ChrisTrask.jpg Source: Complementary Push-Pull Am...
by DanubeBCL
Thu May 18, 2017 8:31 am
Forum: General
Topic: ADS-B ob RSP 1?
Replies: 2
Views: 638

Re: ADS-B ob RSP 1?

Will I need a special antenna? A special antenna designed for the 1 GHz range is not a bad idea. Wideband antennas sometimes do not give strong enough signals in this frequency range. I used a simple homemade construction for my RTL dongle tests made of copper wire like this http://www.qsl.net/dl4m...
by DanubeBCL
Thu May 18, 2017 6:25 am
Forum: SDR Antennas
Topic: RA0SMS Miniwhip bad performance on SDRPlay
Replies: 28
Views: 6181

Re: RA0SMS Miniwhip bad performance on SDRPlay

It is not my intention to blame something or someone. But I would neither recommend to use dual gate Mosfet nor to apply extra amplification in an active whip antenna. I know that dual gate Mosfets were the absolute must in the 80s of the last century and were often used in RF amplifiers and active ...
by DanubeBCL
Mon May 01, 2017 4:41 pm
Forum: General
Topic: Will SDR Play work to do HF Aviation Scanning?
Replies: 5
Views: 1380

Re: Will SDR Play work to do HF Aviation Scanning?

CSVUserlistBrowser app. Please mind that a list browser interfacing via a serial COM port cannot replace a communication scanner. It's just meant for a rudimentary overwiev of what is present on given channels (mainly broadcast stations). Moreover SDRuno does not report valid squelch levels by CAT,...
by DanubeBCL
Thu Apr 27, 2017 8:59 am
Forum: General
Topic: ZeusRadio may soon be compatile with SDRPLay
Replies: 30
Views: 11469

Re: ZeusRadio may soon be compatile with SDRPLay

After the ZS1 transceiver hadn't brought the expected success they guys tried to bring in some money by selling the ExtIO and HPSDR version of Zeusradio. First they distributed free test versions in various forums and collected user reports. Then all of a sudden the "final" version was no ...
by DanubeBCL
Sat Apr 15, 2017 6:25 am
Forum: SDRuno
Topic: New user question - please see my screenshot
Replies: 9
Views: 1440

Re: New user question - please see my screenshot

the longwire comes directly into the shack and the SDR. This is no good arrangement. Keep everything which acts like an antenna as far away as possible from your house (and neighbouring houses), match the antenna to 50 Ohms at its best and use coaxial cables to bring the signals into the house. Pla...
by DanubeBCL
Fri Apr 14, 2017 9:14 am
Forum: SDR Antennas
Topic: pwr supply for miniwhtp
Replies: 3
Views: 833

Re: pwr supply for miniwhtp

Hello, I do not know which electronic shops in the States still have analogue PS in their portfolio. I have searched a bit in ebay.com, but the result was a desaster: All wallmart PS I found were switched. Some hamradio shops still have 12/13.8 V PS at higher amperage which are analogue. But they ar...
by DanubeBCL
Fri Apr 14, 2017 6:57 am
Forum: SDRuno
Topic: New user question - please see my screenshot
Replies: 9
Views: 1440

Re: New user question - please see my screenshot

Appr. 75 kHz spacing. Could be a switched power supply or plasma/LCD telly, indeed. If the source is in your own home (room), try a common mode choke in the coaxial cable at the receiver input or better ban every switched PS from your house. When the source is your neighbour: Good luck with your neg...
by DanubeBCL
Thu Apr 13, 2017 7:11 am
Forum: SDRuno
Topic: CSVUserListBrowser UI instructions?
Replies: 7
Views: 1240

Re: CSVUserListBrowser UI instructions?

I do not have this help file nor will F1 open a help file This is totally strange. Did the application not create a folder structure as in the image after first start? Then there must be a problem with system priviliges (folder without write access) or a virus software must block something. 73, Hei...
by DanubeBCL
Thu Apr 13, 2017 7:00 am
Forum: General
Topic: Interference identification?
Replies: 37
Views: 6089

Re: Interference identification?

That's appalling, but any knowledgable SWL or Ham could have told these 'experts' that if you apply a significant amount of RF to a piece of wire it will travel along it and radiate from it. The website of the well known German manufacturer of Fritzbox says, PLC does not interfere with radio recept...

Go to advanced search