Search found 76 matches

by OH2BUA
Mon Jul 16, 2018 1:11 pm
Forum: SDRuno
Topic: SDR UNO + RSPduo + Decimation window
Replies: 10
Views: 4244

Re: SDR UNO + RSPduo + Decimation window

Hi,

I too have experienced the decimation pulldown to disappear without any clear specific reason.

I'll tell in case i'll find a repeatable sequence.

73, Jukka
by OH2BUA
Fri Jul 06, 2018 11:33 am
Forum: General
Topic: RSP RECEIVER LOW NOISE HF OPERATION WITH LONG WIRE ANTENNAS
Replies: 30
Views: 13760

Re: RSP RECEIVER LOW NOISE HF OPERATION WITH LONG WIRE ANTENNAS

Gianfranco,

thank You for your very classy article.

I will read it for several times and compare with my own observations.

73, Jukka
by OH2BUA
Mon Jul 02, 2018 12:25 pm
Forum: Code Corner
Topic: Propagation-triggered recording
Replies: 8
Views: 11311

Re: Propagation-triggered recording

Hi fellow, included in downloadable zip-file, you can find a README giving instructions. But sorry to say, for newcomers this is not very easy to get running. To start it would help a lot if one is famliar with HDSDR, WSJT-X, Omni-rig, virtual serial ports and virtual audio drivers. But have a try -...
by OH2BUA
Thu Jun 14, 2018 3:00 pm
Forum: SDR Antennas
Topic: Newbie RF frontend protection Qs
Replies: 27
Views: 14293

Re: Newbie RF frontend protection Qs

18 MHz only?!


Above 18MHz, my friend. I'm monitoring between 1.8-50Mhz (with that antenna), and I feel that on 6m I'm almost deaf.

I have other gear going nicely over 1GHz.

73, Jukka
by OH2BUA
Thu Jun 14, 2018 11:12 am
Forum: SDR Antennas
Topic: Newbie RF frontend protection Qs
Replies: 27
Views: 14293

Re: Newbie RF frontend protection Qs

Thanks for your replies. I'm planning for a 'major upgrade' for my 2*1N4148 protection system, to go for 4*1N4148. That's mainly to push down the unwanted capacitance, as I feel that my monitoring system is a little bit hard-in-hearing above 18MHz. https://www.pskreporter.info/pskmap?preset&call...
by OH2BUA
Tue Jun 12, 2018 2:52 pm
Forum: SDR Antennas
Topic: Newbie RF frontend protection Qs
Replies: 27
Views: 14293

Re: Newbie RF frontend protection Qs

Is it for sure proper way to calculate two 1N4148 diodes in series simply like 0.7 + 0.7 = 1.4V ? If we deploy 2 volts over that, is the forward voltage over one diode 1V... or perhaps just plain 0V? (Like to hear that 1.4V is ok calculation... as also the (unwanted) capacitance is halved.) 73, Jukka
by OH2BUA
Mon May 21, 2018 11:43 am
Forum: SDRplay related
Topic: RSPduo dual API question
Replies: 6
Views: 2543

Re: RSPduo dual API question

Thanks for your prompt answer.

In case you happen to need a betatester for ExtIO, I can volunteer as I 'seriously' need it.

73, Jukka
by OH2BUA
Mon May 21, 2018 6:02 am
Forum: SDRplay related
Topic: RSPduo dual API question
Replies: 6
Views: 2543

RSPduo dual API question

Dear Support, (sales not needed as my first RSPduo is already on shipment to me:) could you please clarify a thing from the Introduction-document, pages 3-4, regarding the new API concept: Do I understand right, that it would be possible operate let's say Tuner 1 with SDRuno and Tuner 2 with HDSDR -...
by OH2BUA
Thu Apr 12, 2018 6:08 am
Forum: SDRplay related
Topic: RSP2A and RPi 3 B+
Replies: 15
Views: 7178

Re: RSP2A and RPi 3 B+

Hi,

I have something to ask about the RasPi-image:

1) Is it based and compatible with some well-known distro? Raspbian I hope?

2) Is there included a thing which allows one to receive USB by using command line interface?

73, Jukka
by OH2BUA
Tue Apr 10, 2018 4:26 pm
Forum: SDRplay related
Topic: Front end protection during TX?
Replies: 5
Views: 2943

Re: Front end protection during TX?

@SDRFreq,

RSP2 HiZ-input can be used under 30MHz only, it's 1000 ohm balanced and there's no bias-T in it.

Very deaf it is not, have look at world Top 20: https://www.pskreporter.info/cgi-bin/pskstats.pl

73, Jukka

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