My latest gadget - a nanoVNA-H4, vector network analyzer. The screen shows the result of
sweeping a small uhf antenna I built a few years ago.
This is a screen shot of the nanovna saver software. If you have your laptop next to you,
it makes it a little easier to enter frequency changes etc, and you can separate the screens.
This my AllStar Node, but these days, I just use DV Switch on my Android phone to access
the node, and you don't even need to build an interface with a sound card at all, and it even
sounds better! More information about Allstar.
1991 Callbook - pen and ink. Click for a larger image.