G8JNJ

I have said this before, but I consider the KiWi to probably be the best radio hobby related purchases I've ever made, and it has reinvigorated my interest in Short Wave listening, and utility monitoring.

Nearly every week I discover something new, or an enhancement that John has implemented. Which is in stark contrast to other developers, who often immediately dismiss legitimate requests from users and admins.

The TDoA function is a stand-out feature, that has made an otherwise difficult aspect of the hobby, IDing the location of unknown transmitters, become relatively straightforward.

I have recently swapped out my computer monitor from the 22" model I was using, to a repurposed 44" 4K TV, and it's a game changer. Being able to see a vast swathe of spectrum, in relative HD, is superb, and makes spotting unusual signals, or patterns of signals, very easy.

My sincere thanks to John for continuing to support the KiWi, despite the extremely difficult trading environment, and to all the others who have contributed in some way, it is much appreciated.

Regards,

Martin

In addition.

If you have more than the specified number of users trying to connect, the additional ones can "queue" to wait for the next free slot, or "camp" where they can "piggyback" onto an existing user and hear just the audio.

This is useful when you have a lot of users all wanting to listen to the same thing, such as a popular amateur radio net.

The maximum number of campers can be defined in the "Control" admin page.

Regards,

Martin

You can place attenuation ahead of an LNA to improve strong signal handling, but the amount of attenuation needs to be chosen carefully, to take into account the LNA gain and Noise Figure, in order to ensure that the overall system Noise Figure is not any worse than the basic receiver alone.

If you search though the forum you will find many posts on the subject of equalisers, filters and notches.

Here is one example

https://forum.kiwisdr.com/index.php?p=/discussion/comment/5723

For a more detailed analysis of how equalisation can be applied in order to reduce the noise contribution due to intermodulation effects without affecting the basic Signal to Noise performance, see if you can find a copy of this paper on-line.

https://digital-library.theiet.org/doi/10.1049/ree.1977.0028

Regards,

Martin

Ah OK...

Personally, I wouldn't recommend that model, but let's see how it works for you, when used with your antenna.

I'm not sure what device the Noolec is using, but I guess it will be something like the Qorvo QPA4363A.

Rather than issues with MW stations, it's more likely to be issues with possible overload from any strong FM broadcast stations, or other VHF transmitters that may be around your location.

The reasons I suggested a PGA-103 based amplifier for your application are, good IMD performance, low noise figure and rising input impedance, which helps improve signals on the LF bands, especially when using a short antenna. The current consumption is a bit higher at around 100mA. Noolec may have chosen a lower power consumption device, so that it can be used with the limited current available from sdr's with built-in bias tees, many of which have a maximum current rating of around 50mA.

But experimentation is all part of the hobby, so just try it, and be sure to report back with your findings.

If you need any specific help, send me a PM.

Regards,

Martin

I don't think you will be able to get in using WinSCP.

I'm experiencing similar problems since updating the OS version, and WinSCP doesn't provide the option to log in as su. I seem to remember reading a thread about it but can't find it.

Also, with Debian 11 to enable root login, you can add a line to the sshd_config file in /etc/ssh/sshd_config:

Edit the file as root using nano /etc/ssh/sshd_config

Add the line PermitRootLogin yes in the Authentication section

Save the file

Restart the SSH server using service sshd restart

I swear the Linux folks move the goalposts purely to keep us muggles at bay, but if you do find a solution, be sure to tell us, as this is turning out to be a real pain.

Regards,

Martin