Early alpha version available of my miniVNA software

MiniVNA - zaterdag 19 december 2009 10:47
Early alpha version available of my miniVNA software.

More info on this page: PA7N miniVNA
By: Erwin PA7N | Permalink | 5 comments


Karl Jan Skontorp

vrijdag 18 december 2009 22:32
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

Karl Jan skontorp

vrijdag 18 december 2009 22:37
Delphi and grapichs.....
Of course I mean in the miniVNA project!!


Erwin PA7N

zaterdag 19 december 2009 11:14
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

Matti Niemela

zaterdag 9 januari 2010 17:10
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

Mike Yetsko

dinsdag 17 mei 2011 14:37
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