"No doubt at all, this is dynamic saturation during the times when di/dt is minimum." Yes I agree. I realized that after I read the paper on audio transformers...
Hi Bob, ... I still think there is a good chance of harmonic suppression getting down to 1 kHz for a simple VNA with only one transformer at each end but with...
Hi Mike, ... A few questions: 1. Are you measuring distortion at the bridge output or DUT port? 2. Is there a 50 ohm termination either internal or external to...
... Good points Paul, The data was measured unterminated from the bridge DUT port. This would include the RF DDS, transformer, filter, my SMA RF switch and ...
Hi Mike, Thanks for the distortion data with and without the T1-6T bridge. It basically shows that most of the distortion is generated prior to the bridge and...
"The data was measured unterminated from the bridge DUT port. This would include the RF DDS, transformer, filter, my SMA RF switch and the T1-6T bridge." I...
May I ask a question to the group: Often we use Baluns and UN-UN transformers to transform impedances and/or change a single ended (unsymetrical) impedance to...
Hi Ulli Have a look at http://granta.g4axx.com/Balun.php3 I measured 4:1 baluns by terminating the 200R balanced side with a 200R resistor and looked for 50R...
Hi Ulli, as there is a certain chance that you can read and interpret german, I would recommend the following link to you (very practical and you have to...
May I ask a question to the group: Often we use Baluns and UN-UN transformers to transform impedances and/or change a single ended (unsymetrical) impedance to...
Google can translate web pages, see this link http://www.google.com/language_tools 73 W4GNS Hi Ulli, as there is a certain chance that you can read and...
My VNA is finished and working. Thanks to Paul and others who encouraged me in the dark days when I fought the computer dragon; at that stage I thought that,...
must take awhile to show up in your folder. when it does i'll check it out, thanks ... From: kerrypwr To: N2PK-VNA@yahoogroups.com Sent: Thursday, December 04,...
Hi Kerry, Equipped with a bare pcb ready to be completed, I was glad to find a 4.3 version, but in fact the resolution is a bit low, May I request a better...
Ron, if you refer to the Master Oscillator area, see this page http://www.makarov.ca/vna_2503.htm and scroll down to "Board revision v4.2 details" section Ivan...
my bad looked in wrong folder ron ... From: kerrypwr To: N2PK-VNA@yahoogroups.com Sent: Thursday, December 04, 2008 4:37 PM Subject: [N2PK-VNA] Re: ver 4.3...
Ivan, With reference to your excellent documentation, i find i cannot print it out, i have to use another piece of s/w (mw snap) and print a page at a time as...
... I just put two high res photos of the V4.3 board that I finished soldering last week in the W4KIT folder in the "Photos" section. They're big (3MB each)...
Hi George, that seems like a M$ IE bug, and was answered before: "In the WEB browser click menu File->SaveAs, in "Save as Type:" box select "Web page,...
I wrote earlier about my troubles with detector 2. The problem is that ADC #2 will read out voltages and then stop responding, when using the MyVNA program...
Hi Dudley Been looking over last few days at a glitch problem that may be pertinent. If you are using XP and the parallel port, there is a gotcha. When Windows...
Hi all I have uploaded a new version of the debug guide following Roderick's and Kerry's experiences. Also there is a new section on glitches caused by some...
