Comments for Mike Richards G4WNC

Comment on Arduino Code for 0-500MHz, 1nW to 100W RF Power Meter by Mohsin Siddique

Mohsin Siddique — Sun, 30 Apr 2023 14:50:17 +0000

I bought chinese ad8307 module . I have made changes I hooked up 50ohom resistor at the front end of the ad8307 module. You recommend not to use chinese ad8307 module. So what should I do. Which website is the best to buy this chip

Comment on Arduino Code for 0-500MHz, 1nW to 100W RF Power Meter by Mohsin Siddique

Mohsin Siddique — Sun, 30 Apr 2023 14:43:56 +0000

Mike thanks for quick reply. AD8307 module from SV1AFN, has an opamp Lm358. Had you used the opamp?

Comment on Arduino Code for 0-500MHz, 1nW to 100W RF Power Meter by Mike Richards

Mike Richards — Sun, 30 Apr 2023 14:10:26 +0000

In reply to Mohsin Siddique. Hi Moshin, The project was based on using the AD8307 power detector module from SV1AFN. You will find a link HERE The module is based on the AD8307 application note, so should be easy to recreate. NB: I don't recommend using the cheap AD8307 modules from eBay (China) as, in my experience, they use substandard components that make accurate calibration very difficult. Regards, Mike

Comment on Arduino Code for 0-500MHz, 1nW to 100W RF Power Meter by Mohsin Siddique

Mohsin Siddique — Sun, 30 Apr 2023 10:26:13 +0000

Which schematic do I have to use?

Comment on NanoVNA Saver on the Raspberry Pi by Mike Richards

Mike Richards — Tue, 18 Apr 2023 10:19:38 +0000

In reply to Russ Nixon.

Hi Russ,

Unfortunately, the latest version of NanoVNA Saver requires PyQt6, which is not currently available or easy to install on the Raspberry Pi. When this situation changes I’ll update the instructions.

Regards,

Mike

Comment on NanoVNA Saver on the Raspberry Pi by Russ Nixon

Russ Nixon — Tue, 18 Apr 2023 02:10:41 +0000

I’m running “buster” on a Pi 3b+ and I’ve installed NanoVNA Saver per your instructions. When I run it from the command line, I get this output:

rcnixon@raspberrypi:~/nanovna-saver $ python3 nanovna-saver.py
Traceback (most recent call last):
File “/home/rcnixon/nanovna-saver/nanovna-saver.py”, line 28, in
from NanoVNASaver.__main__ import main
ModuleNotFoundError: No module named ‘NanoVNASaver’

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/home/rcnixon/nanovna-saver/nanovna-saver.py”, line 33, in
from NanoVNASaver.__main__ import main
File “src/NanoVNASaver/__main__.py”, line 31, in
from PyQt6 import QtWidgets
ModuleNotFoundError: No module named ‘PyQt6’
rcnixon@raspberrypi:~/nanovna-saver $

Do you have any enlightenment for me?

Thanks.

Comment on Installing Unsigned Drivers on Windows 10 or 11 by Dominic Oskis

Dominic Oskis — Sun, 05 Mar 2023 12:37:05 +0000

Thanks Mike
Worked for me using Windows 11.
Dominic
G0DOM

Comment on NanoVNA Saver on the Raspberry Pi by Mike Richards

Mike Richards — Sat, 04 Mar 2023 16:29:33 +0000

In reply to tim.

Hi Tim,

It’s usually automatic because Linux loads the appropriate driver as soon as a new hardware connection is detected.

You can check to see if your NanoVNA is being detected as follows.
With your NanoVNA disconnected, open a terminal session and enter ls /dev/ttyAMA*
This will list any connected serial ports
Next, plug in the NanoVNA and run the command again. The NanoVNA will normally appear as /dev/ttyAMA0

Mike – G4WNC

Comment on Raspberry Pi – Running Spy Server as a service by Mike Richards

Mike Richards — Sat, 04 Mar 2023 16:06:03 +0000

In reply to Eric.

Hi Eric,

I’ve not tried running two instances of the server. I’ll try it out next week when I get back in the shack. Here’s a couple of thoughts if you want to experiment.

1 – You will need to create two spyserver.service files and matching spyserver.config files.
2 – In the config files, you will need to specify a different port for each instance
3 – You may have the limit the bandwidths available from each instance. Even a Pi4 won’t be able to process two lots of 8MHz Airspy bandwidth!

Mike – G4WNC

Comment on Raspberry Pi – Running Spy Server as a service by Eric

Eric — Sat, 04 Mar 2023 14:36:20 +0000

Thanks for your help, it worked fine for me.
However, what should we put in the “sudo nano /etc/systemd/system/spyserver.service” file when we want to launch a second airspy or rtlsdr at startup ?