I am laying out companion power supply board for the N2PK-vna that will include the DB25 connector, a Power Connector, and support the use and charging of a...
Hi All, offering for sale some extra MC1496 mixer ICs (SMT), shipping worldwide included : $5/2 $7/4 $9/6 Please reply direct left at rogers com Thks. Ivan ...
I have a couple of observations plus a question concerning the VNA pcb parts list from Part 2 of Paul's articles. 1. Part number for J220 is listed as...
Hi Brian, beside the fact that building a Bill of Materials is a hard job by itself, the suppliers often update their inventory. Something that is available...
Hi Ivan: Yes indeed, BOMs can be tricky and things change which is why I didn't think I was uncovering anything new. I'm building the original single detector...
Hi Brian, As a follow-up to Ivan's comments, one feature of my including the manufacturer's part numbers in my original BOM is that permits the builder to...
... As the developer of the VNA, Paul needs to disconnect and change the boards quite frequently, so reliable connectors are a high priority for him. "The rest...
Hi Ian, Good points. My comments were made assuming the user would want to make the PCB removable which isn't always required, as you say. Soldering results in...
While this article primarily shows effects of test cable flexure at 30 GHz, there are some general bits of info that are applicable to any VNA and may be of...
Thanks for that background info Paul. I've not heard of tin-gold icompatabilities but seeing them far apart on a table of dissimilar metals did raise a flag. I...
Thanks for that background info Paul. I've not heard of tin-gold icompatabilities but seeing them far apart on a table of dissimilar metals did raise a flag. ...
Paul and all, Tin/Gold contact fretting corrosion is indeed a problem in low current applications. Use if tin to tin contacts or gold to gold contacts will ...
I am finally gathering parts to upgrade my old Mark I version VNA to the two fast detector version. Does anyone have a spare PCB for the original version that...
I am finally gathering parts to upgrade my old Mark I version VNA to the two fast detector version. Does anyone have a spare PCB for the original version that...
Alternatively does anyone want the two extra ones that I would have to order if I went back to PCB Express? And yes, I do know that there are versions of the...
... Most commercial 4 and 8 way splitters use multiples of the standard two way splitter cascaded. Design will depend a lot on the frequency range involved....
You might want to look at http://ridgeequipment.com/store/page3.html They always have good deals on splitters, terminations, attenuators, etc. I highly...
The N2PK VNA website is now only accessible using <http://n2pk.com> This website no longer points to Adelphia and is being hosted elsewhere. The site has been...
I am completing the build of Dave's (G8KBB) usb interface. Site specific information: I have a dual detector vna using Gian's boards. I am installing the...
Hi Richard, Dave, G8KBB, will likely address many of your questions. ... As I recall, this line looks for a +5V level from one of the VNA power supplies....
I tried using my company connections to get a sample of the oscillator. No joy. But, they did offer to sell me 16 pcs at $50 each. If there is an overwhelming...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
