Hi!
I just wonder which components you have used in Delphi to make the graphics. I'm working on a similar project and is just wondering.....
73's de Karl Jan LA3FY

Delphi and grapichs.....
Of course I mean in the miniVNA project!!

kj

Hi Karl Jan,
I use no special component for drawing. Just TBitmap and double buffered painting. This way you get a flicker free screen.
The communication with miniVNA runs in a separate thread so it won't block the user interface.
73 Erwin

Hello Erwin PA7N,

Thank you for the nice MiniVNA program. Latest version works OK. I like especially possibility to tune also under 100 KHz even though the levels are lower of course. Anyway I can check the resonance frequencies of LC-circuits on VLF-band 10 kHz-100 kHz also with these reduced levels.
I measured following levels with W&G Level meter SPM-19 in to 50 Ohm load.

5 kHz - 53.2 dBm
10 kHz -33 dBm
20 kHz - 18.8 dBm
50 kHz -7.7 dBm
75 kHz - 6.9 dBm
100 kHz -6.2 dBm

Best 73

Matti OH2ZT

For a first effort that software looks pretty darn good!

I'd love to see your source code, and maybe even collaborate with you on the software!

Mike Yetsko
N1DVJ