It seems like a good plan to me. I'd expect the synthesizer to work even better due to many more samples per cycle. There's typically an output filter following the DDS chip that you might want to red

Well, when the PHSNA project was going strong I know that there were at least a couple of folks working on stand-alone versions. You might look at this group’s ‘files’ and ‘photos’ sections to see wha

I don't know if interest in the measurement receiver ever "took off" so there may not have been many boards. All the boards for the project were produced by N5IB, except for cases where folks decided

That’s very interesting, Gary. I’ll check it out. Some of the brains behind nanoVNA are supposed to be working on an inexpensive SA. That sounds interesting. And then there are people using those DSP

I've been working on an SSB exciter using my Si5351a programmed as an I/Q VFO and some circuits from EMRFD. I finally got my two boards all wired up. Hooked up an audio generator and my Si5351a I/Q VF

Ron, Congratulations on getting those treatments behind you. As for boards for the projects. I'm assuming Jim is not in the PHSNA board business any longer. But there might be some on the list with ex

I posted earlier about finding the software & Arduino source code. As to the hardware - there's a lot of hardware info in the Files sections. People posted photos and info on their builds of PHSNA and

We received this message under the "New Members" topic: " The various versions of the software and hardware files are not always clearly identified. It would be helpful if someone who knows the projec

Hi Ted, It seems you're aware that Ignacio added another set of polynomial constants to parameters.txt in revision 1.42, so I can't blame that. Yes, you may have read in the User's Guide about "cheati

It's different for everyone, but I'm not sure I'm up to soldering in any more TSSOP chips. I've done them successfully with an iron and with a heat gun but don't want to press my luck going forward. A

Well, nothing specific but there's a lot of good content on there. I think a lot of those recently signed up came from the nanoVNA group where Ignacio EA1APL (I think) had mentioned some of the resour

Hello PHSNA- I've recently become one of the moderators for the group. I note that we've had 18 new members sign on in this month. You should now have access to the messages and files in this group. I

Well, I did go and try the circuit described in the video. I wanted to see that feedback circuit work to control output level. I had to fool with some components to get the loop to control. I was only

Very nice circuit Hans, and a great video to describe it in detail. I'd be tempted to try to duplicate it but I've already got several "watches" that give me a well defined RF level. 73- Nick, WA5BDU

If the inductor has a core material other than air, such as powdered iron or ferrite (and it probably does), the DC current through it could saturate the core material. That would cause the inductor t

For that purpose, I'd try to assure 50 ohms by following the output with an attenuator. I wouldn't assume a specific source resistance internal to the Si570. Another issue if you're trying to use the

For this program it might take a bit of work. The program is set up to have pre-calculated register values for all frequency ranges within the specified limits, so the amount of calculation required f

I don't want to speak for him but I think Jim said he didn't notice much difference with and without the foil. It sure looks cool though. I'd suggest that Hobby Lobby might have copper foil or sheets

I went to the 5.528 MHz IF solely in the spirit of trying to use parts that are in my junk box. It certainly has no advantage over the frequency chosen by Jerry H. Some of the other stuff I did is har

It's been 4+ years since I built mine, but I have some notes, fortunately. Your idea of testing in sections is certainly a good one. I had to do a lot of troubleshooting, although not generally due to