With its dimensions of 57 mm by 34 mm by 11 mm you can call Daniu's DSO188 a matchbox oscilloscope. If you think this device is nothing more than a funny, but useless toy you are wrong. It allows you to observe signals up to 100 kHz. W
Anyone looking for a low cost scope to trouble shoot (a least audio and low frequency such as encoders) parts of their UBitx, these little oscilloscopes were on sale. I bought one. It only has a 1 Mhz bandwidth, but that is better than the 200 Khz bandwidth on many of the other cheap tiny scopes.
I would like to offer a suggestion for the Pi-Star software. I believe this is something that would benefit more hams than just myself, especially Net Control operators.
Concerning the Gateway Activity screen. Is it possible to have a configuration setting to allow the user to set more than 20 rows of activity. Displaying a vertical scroll bar on the right to go back and retrieve calls that have rolled off the screen? On the left side of the row, the number of rows desired would be set in the cofiguration menu. There is plenty of room on the left where the time is displayed to number each row so you can scroll backwards to look at any call signs that were missed because of the roll off.
NanoVNA vs Conventional Antenna Analyzer - MFJ-259C or Rig Expert AA-600
I bought an MFJ-259C a few years ago. Cost me about $550. It’s ok but a bit poor quality. Rig Expert are better for sure, but I wouldn’t buy a conventional antenna analyzer any more. The Nano VNA is the way to go and dirt cheap. Like US$50. There’s one with a larger screen now too for a bit more that’s worth the extra money in my opinion.
There was a detailed review in QST in one of the recent issues (last three months – I forget which one).