Search found 25 matches

by DF1KZ
Mon Oct 02, 2017 4:29 pm
Forum: SDR Antennas
Topic: Antenna's
Replies: 4
Views: 1729

Re: Antenna's

Hello, I use the RSP2pro with a Diskone on Port B and an active antenna (DX10) on Port HiZ and Port A. For HiZ I use a homebrew transformer 6:26 wdg on a BN73-202 binocular core. Port A of the RSP2pro and the input of the transformer are connected to the DX10 (behind the Bias-T) by a simple resistiv...
by DF1KZ
Sat Sep 30, 2017 3:20 pm
Forum: SDRplay related
Topic: Blew up antenna port A on my new RSP2. :(
Replies: 4
Views: 1125

Re: Blew up antenna port A on my new RSP2. :(

Hello Jimbo,

imho the devices you mention are diodes like BAV99 (A7). They work as limiters.
If port B and HiZ is still working I would try to remove this diodes and make a test whether reception is possible.
The IC labelled 251 is a antenna switch. Hopefully you didn't blow that.

Wolfgang
by DF1KZ
Sun Sep 24, 2017 2:47 pm
Forum: SDRuno
Topic: SDRuno freezes
Replies: 7
Views: 1643

Re: SDRuno freezes

I have the same problem as wolfdd using "HDSDR with RSP2" rev. 2.76 . Sometimes when I switch between antenna "High Z" and antenna "A" using ExtIO HDSDR freezes. I have to stop and start again then everything works fine. Seems to be a little bug in the antenna-switching...
by DF1KZ
Sun Jul 23, 2017 7:27 am
Forum: SDRplay related
Topic: RSP2 LO 3rd harmonic spurious response only -20dBC
Replies: 17
Views: 4035

Re: RSP2 LO 3rd harmonic spurious response only -20dBC

Hello Andy

Give a BN 73-202 a try. For me it works down to 10 kHz as a matching transformer for the HiZ-input of the RSP2.

73, Wolfgang (DF1KZ)
by DF1KZ
Sun Jul 23, 2017 7:22 am
Forum: SDRplay related
Topic: Reference IN & OUT - Which plugs fit
Replies: 2
Views: 605

Re: Reference IN & OUT - Which plugs fit

You can buy inexpensive adapters to BNC at several Chinese online-stores. They work very well.

Wolfgang (DF1KZ)
by DF1KZ
Sun Jul 23, 2017 7:14 am
Forum: SDRplay related
Topic: Couple of RSP2 Newbie Questions...
Replies: 4
Views: 1408

Re: Couple of RSP2 Newbie Questions...

Hello Everyone, It is very simple to build a transformer for the HiZ-input of the RSP2. Just use a binocular core BN 73-202 (1€) with 3 turns primary and 13 turns secondary. You can also try 2 turns/9turns that may be better on higher frequencies. It takes 10 minutes to wind the transformer. Using t...
by DF1KZ
Sun Dec 25, 2016 11:33 am
Forum: SDRplay related
Topic: Using the RSP1 with a noise source aka Scalar Network Analyzer
Replies: 8
Views: 10382

Re: Using the RSP1 with a noise source aka Scalar Network Analyzer

I use this Noise Source, a RSP1 and a Mini Circuits ZEDC-15-2B coupler. The noise source is really good, it becomes even better if you remove the third amplifier and insert a few dB attenuation between source and coupler. The reason for the high temperature of the source are the resistors used with ...
by DF1KZ
Fri Dec 02, 2016 1:57 pm
Forum: SDRplay related
Topic: RSP1 with Win10 MiniPC
Replies: 5
Views: 1899

RSP1 with Win10 MiniPC

I made some experiments with RSP1 and Mini PCs "WINTEL CX-W8" and "GOLE1". This are small PCs with Intel Z8300 Quad-core, Windows10, 2GB (GOLE1 4GB) RAM and 32GB ROM. It works! I tried HDSDR 2.75 with latest API/EXTIO, SDRuno 1.11 and Dump1090. The maximum usable bandwith is abou...
by DF1KZ
Thu Jul 07, 2016 5:33 pm
Forum: General
Topic: Lowest frequency
Replies: 17
Views: 9505

Re: Lowest frequency

Hello All, the station with the lowest frequency I can receive is the RSDN-20 TX on 11,905 kHz. The SAQ-transmission from 08:41 to 09:07 UTC on July, 03. 2016 was received here 20dB above noise floor using a bandwidth of 200Hz. Antenna: rf-systems DX-10 Receiver: SDRplay, HDSDR 2.70 QTH: Cologne, Ge...
by DF1KZ
Wed May 25, 2016 1:21 pm
Forum: New Users' experiences
Topic: Can only pick up my local radio station
Replies: 4
Views: 3258

Re: Can only pick up my local radio station

Hello John The signal you see in your first and third picture is the LO from SDRplay. This signal is generated inside the SDRplay. Your local Radio Station seems to be very strong and can be received even without an antenna. If you would like to listen to it I would prefer the FM-demodulator and a l...

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