Search found 124 matches

by ON5HB
Mon Apr 22, 2019 4:25 pm
Forum: General
Topic: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz
Replies: 36
Views: 5174

Re: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz

What do you mean wrong info and specs? It's not a transmitter but a receiver, as such impedance isn't crucial to good workings. Exactly what I wrote. The official published specifications by Sdrplay say: 50 Ohm input impedance. If you write in so many words it is not so, you are being unfair to Sdr...
by ON5HB
Fri Apr 19, 2019 3:55 pm
Forum: SDRplay related
Topic: FOR FM DX Which modell RSP
Replies: 4
Views: 882

Re: FOR FM DX Which modell RSP

I tried the RSP1A on FM (3m band) and it's absolutely splendid.
by ON5HB
Fri Apr 19, 2019 3:52 pm
Forum: General
Topic: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz
Replies: 36
Views: 5174

Re: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz

sdrom33 wrote:It could help to know what splitters you are using. The RSP1a input is rated 50 Ohm, why should it be different? Why should sdrplay give wrong info & specs?


What do you mean wrong info and specs?
It's not a transmitter but a receiver, as such impedance isn't crucial to good workings.
by ON5HB
Thu Apr 18, 2019 4:31 pm
Forum: General
Topic: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz
Replies: 36
Views: 5174

Re: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz

I tested a splitter for the RSP1A. Normal situation is T-connectors to 3x RSP1A. I tried an splitter 5-2500MHz, splitted and the signals went down a lot. This makes me believe that the input of the RSP1A is not 50 Ohm but very high impedance. My splitter made a big impact on the signals, where my de...
by ON5HB
Thu Apr 11, 2019 5:14 pm
Forum: General
Topic: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz
Replies: 36
Views: 5174

Re: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz

SDR receivers like the SDRplay do not have a local-oscillator. They do have an oscillator but it has no mixing functions or other stuff. It's just a clock to make the chips tick, there is no RF to mix it with or such. The oscillator has 2 purposes, that is a reference and a steady clock for the chip...
by ON5HB
Thu Apr 11, 2019 3:11 pm
Forum: General
Topic: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz
Replies: 36
Views: 5174

Re: 3 dB HYBRID COUPLER/ISOLATOR FOR ANTENNA SPLITTING 100 KHz -10 MHz

What happens when you simply split with T-connectors? With my websdr I did such, the signal levels did drop a bit, but that is a non issue as the s/n-level-range is enough to compensate. I have ordered an 8-way splitter but not installed yet. My question is this: Why do we need insulation between 2 ...
by ON5HB
Sat Apr 06, 2019 4:58 pm
Forum: General
Topic: Antenna Questions (RSP-2)
Replies: 1
Views: 541

Re: Antenna Questions (RSP-2)

Have you tried connecting the coax to port A or B and go from there? As you already have a balun outside transforming to 50 Ohm. As for blowing the box to pieces, that is not going to happen unless you connect a transceiver to it directly or close. The ports are protected against ESD etc and they ca...
by ON5HB
Tue Apr 02, 2019 9:30 am
Forum: New Users' experiences
Topic: How do you down load the RS-API ?
Replies: 4
Views: 1922

Re: How do you down load the RS-API ?

Well, Firefox did solve the mystery as to where the file is coming from:

Code: Select all

wget https://www.sdrplay.com/software/SDRplay_RSP_API-Linux-2.13.1.run


Tada!!! :lol:
by ON5HB
Sat Mar 30, 2019 10:14 am
Forum: New Users' experiences
Topic: How do you down load the RS-API ?
Replies: 4
Views: 1922

Re: How do you down load the RS-API ?

You can upload it with FTP or SSH, simplest way is to download mc (midnight-commander) then make an SSH connection to the Pi. Normally it will tunnel SFTP and transfers the file to where you want. Then go into the Pi with SSH and "chmod +x filename" and ./filename to run it. mc for Windows...
by ON5HB
Sat Mar 30, 2019 10:08 am
Forum: New Users' experiences
Topic: S-METER READING
Replies: 15
Views: 3268

Re: S-METER READING

I was talking about the S-meter as instrument to measure signals on HF that are not lab-conditions. As an instrument measuring e.g. power in a lab it's perfect as the conditions are always the same and all variables are known. But to give signal reports on areal radio stations it's not very useful. ...

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