Hmm… somehow this didn't seem to go through the first time. There are some really ham-friendly companies out there… If you go to Mini-Circuits website, you can register and received free samples

I also remembered that I got free sample of the AD8307 chips from Analog Devices… http://www.analog.com 73, Mike N5JKY Oklahoma City, OK

There are some really ham-friendly companies out there… If you go to Mini-Circuits website, you can register and received free samples of the ERA-3 chip (they automatically give you 4). Here is

Good day all, The breadboard jumpers in the link provided by Jim work very well. Another alternative are jumper wires made up using the male version of the Dupont

Where do you find the 'patch leads' like shown on the NR8O 9850 test set. These are the ones that mate with the 0.1" spaced plug strips. They look to be commercial, but I can't find them.... 73,

Jim, With aging eye sight and shaky hands, please update my request from the 1 set of boards to 2 sets of boards. No telling what I can do to a board with a soldering iron. Thanks for the

Hi Folks, I uploaded a plot of a 6 element Cohn filter I built last night. This is a 3.276275 MHz filter for a project I am working on. I really like the shape of the filter. I say it is a 6

Hi Joel, Here are the auction numbers where I bought the boards and stuff: 161109783605 : Deek board 230820610037 : FTDI USB to serial board 251314107951 : UNO R3 clone 73.......Steve Smith WB6TNL

Hi Joel, I assume by adaptor you mean the inline connector for the serial port on the Deek-Robot board. It came with each board; a 6-pin, right angle header which conviently solders right onto the

Hi Steve WB6TN, I also picked up a Nano and Pro Mini knock off from China and I'm waiting for the serial programmer module to get here any day. Where did you get the adapter to plug the program

I have posted photos in the Photos section, WB6TNL. Included is: "aruduino pro mini clone - atmega328p" (deek-robot miniature UNO clone kit), deek-robot and UNO R3 clone together for size comparo,

Well, I usually think a transformer should have 5 to 10 times the load resistance in the reactance of its magnetizing inductance, which is just to say the inductance of the winding connected to the

Hi Jim and Nick, It has been my experience that an L network works a lot better than a transformer. However, I have never tried to build one for 50:2000 ohms. The transformers introduce more

This may help, Read the section on “Complex conjugate matching” at: http://en.wikipedia.org/wiki/Impedance_matching A

Hi Nick, This is a easy way to design matching circuits for your filters. But you will need a VNA not a SNA to produce s-parameter Touchstone file to load into RFsim99 software.

 Hi Nick, I'd think you could use a broadband transformer. It ought to do OK over thefairly limited bandwidth of the filters. For 50:2000 you'd need about a 1:6 turns ratio. And the reactance

Since I do have a parallel universe version of the PHSNA working, I've been measuring a few things. Most of my filters I'd already characterized point by point before developing the ability to auto

Damn, say Hello. Ranks with W1FB. ---In PHSNA@..., <phsna@...> wrote: Wes, W7ZOI, has graciously given permission to post my re-drawn, slightly modified schematic of his design from the June

FWIW, I bought an UNO R3 'clone' from an eBay vendor in NY. Cost $12.50, shipped, and took about 3 days to arrive in SoCal. It came with a USB cable and fired right up. I noticed just now that his

Plus, the TS922 is only $1.44 at Mouser, vs better than $6 for the AD822. I only use the 820 and 822 'cause I have a handful of them. In this application not a lot is demanded of the op amp. It's