Search found 12 matches

by DF1KZ
Sun Jul 23, 2017 7:27 am
Forum: SDRplay related
Topic: RSP2 LO 3rd harmonic spurious response only -20dBC
Replies: 17
Views: 1037

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: 140

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: 379

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: 8826

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: 1302

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: 7445

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: 2285

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...
by DF1KZ
Thu Mar 24, 2016 2:14 pm
Forum: SDRplay related
Topic: Power consumption
Replies: 1
Views: 1462

Power consumption

I made a few measurements of the power-consumption of the SDRplay. ADC Sample Rate: 8MHz, Zero IF , IF Bandwidth 8MHz, U=4,98V f < 60MHz : 350mW f > 60MHz : 550mW When ADC Sample Rate is lowered power consumption becomes up to 100mW lower. IF Bandwidth seems to have no influence if Sample Rate is no...
by DF1KZ
Thu Mar 24, 2016 1:24 pm
Forum: SDRplay related
Topic: No ADS-B Reception
Replies: 10
Views: 3254

Re: No ADS-B Reception

@13dka I agree, the discone does not seem to be the best antenna for ADS-B reception. Additionally there are 20m Aircell7 cable in between the discone and the SDRplay but nevertheless I receive a few transponder-signals so I can be sure that dump1090 is working. Next thing I will do is try to receiv...
by DF1KZ
Wed Mar 23, 2016 5:34 pm
Forum: SDRplay related
Topic: No ADS-B Reception
Replies: 10
Views: 3254

Re: No ADS-B Reception

Hallo AB5R, I use the SDRplay together with an ICOM-Discone, 20m aircell7, dump1090 to receive ADS-B signals - it works good. If the plane is eg 35.000ft high the line of sight is more then 200km if there is nothing in between. Living in a large German city with the discone on the roof abt.12m high ...

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