Hi guys, FWIW, I tried many different output amplifier circuits in the early days of my DDS-xx plug-in modules (DDS-30, DDS Daughtercard) in order to provide clean-spectrum at the desired max output l

To support Dave’s recommendation for OSH Park boards, here (attached) is the RF Power Meter board we used in developing the SNA. Worked out real nicely. And you should definitely browse through all th

Hi John, I have the DDS-60 Daughtercard in stock, in both kit and assembled+tested form … http://midnightdesignsolutions.com/dds60/index.html 73, George N2APB ========================== Jim: Received

Hi, Nice work. Would love to see the details of your SA. Have coded many years on the 8051 processor, exclusively in assembly language, and still enjoy it very much. Sounds like you might now have hea

Hi all, “Thank You!” to the wonderful crowd in attendance at last night’s Episode #71 of CWTD. I know that Joe, Dave and I each had a great time presenting the materials on Scalar Network Analyzers, a

Chat With The Designers is back! By popular demand, and after a brief respite for health reasons, we're back on the air with the first episode of the year. It'll be a "second Tuesday of each month" sc

Interesting thread. I think that most antenna analyzers and VNAs in the sub-$500 range are indeed “wide open” … that’s the nature of their operation (collect as much reflected energy as possible, incl

With all the DDS-60 applications I’ve done over the years, or have recommended doing, I very carefully follow the startup sequence outlined in the datasheet, which first reads in the lower (hard-wired

Lots of replies offline shows the interest. Will take me the rest of this coming week to get the parts out of storage here, organized and details made ready for those interested (what parts, cost, etc

Hey guys, I have a number of left-over parts from the K8IQY "PVXO" kit we did a number of years ago ... Including pcbs! If anyone is interested in a "partial PVXO kit", I can dig out the parts and put

Ask away Neil! George N2APB

Thanks Jim! And you bet, we still participate here in the PHSNA group ourselves and will surely keep this group informed of the important news along the way. And that’s great news about your boards ha

Hi all, For more than a year we’ve been living here with our good friends in the PHSNA group, our home and the place where our “NAT project” was born … But it’s finally time to move out and be on our

Forgot all about the earlier boot loader problems Dave, thanks. Ron, let us know if you don't want to drag out your programmer and we can get a new dsPIC to you within a couple of days. 73, George N2A

That’s strange Ron. Are you able to issue other DOS commands and see good results? (e.g., If you enter TYPE NAT3_0.HEX do you see a screen full of ASCII strings displayed, something like … :1001A00070

Naming the file APP.HEX will indeed make the instrument load the file at power-up each time. Better to use the SDLD command to load the specific file. For example, the latest file from the website is

Forgot to add the screen shot of formatting options that I use on all SD Cards sent in the kit … 73, George

Hi Ron, Do you see the list of files on the card when you go into DOS mode? Are you sure the latest file you are trying to load is in 8.3 filename convention? And do you see that file listed? When you

Here’s an informative posting from another list on this subject … 73, George N2APB Re: Interesting very low cost clock generator board Tue Dec 2, 2014 4:58 pm (PST) . Posted by: warrenallgyer Just a c

Hi All, The subject line here says it all … We’re making it easier to get a your NAT and NACT projects looking and working great! See details and photos on the NAT web pages … http://midnightdesignsol