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Update PA7N miniVNA
MiniVNA - Wednesday 28 December 2011 15:59
I have made some improvements to my miniVNA software. I added measuring L, C and Q. There is also A new calculator to calculate L or C. On the DUT port you can put A known C in series with an unknown L (or vice versa) and calculate L by putting marker1 on the resonance frequency. You have resonance when Xs is almost zero and/or when there is a phase turning.More info and download
By: Erwin PA7N | Permalink | 2 comments
Comments
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PA7N Erwin
Tuesday 10 January 2012 13:32
Hello Rocco,
The easiest way is your "Print Screen" key and then copy/paste in some other program like photoshop.
73 Erwin
The easiest way is your "Print Screen" key and then copy/paste in some other program like photoshop.
73 Erwin
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Early alpha version available of my miniVNA software
MiniVNA - Saturday 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
Comments
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Karl Jan Skontorp
Friday 18 December 2009 22:32
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
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
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Karl Jan skontorp
Friday 18 December 2009 22:37
Delphi and grapichs.....
Of course I mean in the miniVNA project!!
kj
Of course I mean in the miniVNA project!!
kj
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Erwin PA7N
Saturday 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
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
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Matti Niemela
Saturday 9 January 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
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
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Mike Yetsko
Tuesday 17 May 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
N1DVJ
I'd love to see your source code, and maybe even collaborate with you on the software!
Mike Yetsko
N1DVJ
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IK6GQC Rocco
congratulations for miniVNA software.
I would like to ask you what software do you recommend to capture the screen and print it.
thanks 73 Ik6GQC Rocco