It's sure frustrating when something just doesn't want to work. I've got one going right now that's hung up, but I'll get it off dead center soon. (Not PHSNA related.) I'm trying to remember all the s

Hi Ted- I hope those hints and links others posted have been helpful. I said they typically provide you with a link. But they they (Chinese vendors of cool little modules on eBay) often don't provide

The CH340G chips have their own driver. Typically when buying a device with the CH340G, you'll be shown a link from which you can download them. I found it pretty easy. 73- Nick, WA5BDU Do the CH340G

Jim Kortge K8IQY did that pretty effectively in his famous 2N2/40 transceiver. You can check it out here. Not sure about the termination effects. http://www.k8iqy.com/qrprigs/QRPRigs.htm 73-- Nick, WA

You would probably have to modify the AD8307 circuit a bit to keep it flat down to audio, assuming you're staying with the basic function of the system. I think the crystal filter keeps the 3 MHz imag

Gary, Definitely go ahead and post your changes. As long as you create your own folder and add a bit of text on what your variations do, I can't see any issues. I think we've already had a number of h

That's a tough one. I did modify one of the eBay DDS units initially, but later changed to the DDS-60. Modifying that tiny SMT board was tricky. I don't have much specific to offer, but in my case, I

Congrats on getting your PHSNA going, Gary! Mine is something of a hot rod too. I spliced on a DDS-60 using perf board back before Jim came out with a nice custom board version. My op-amp for the AD83

It's very strange to see your uncompensated value go steadily up with frequency like that. But the compensation does flatten it out the way it should. Are you using an eBay AD9850 or AD9851, with outb

Speaking of this, return loss should be the same with the port open or shorted, so I took the easy way out and went with open. Then Ignacio EB4APL clued me in on the fact that small errors might on oc

Oh yeah, the alternate tool for computing the coefficients sounds good. I'm just starting to learn a bit about Octave (again!). Maybe it could do the job too. 73- Nick, WA5BDU BTW I found an online pr

The set of readings you take for computing the polynomial coefficients might be all negative, or might be some negative and some positive, depending on how your built your hardware. Some have a maximu

Well, you are correct, Tim. I don't know how this is happening but once again the parameters.txt file on the site has 0x0A line terminators only, instead of 0x0D, 0x0A. (In decimal, that's 13, 10.) I

Quiet, but still breathing. (Working CQ WPX CW) 73- Nick, WA5BDU

Looking forward to it. I'll be there! 73- Nick, WA5BDU

Here is asummary of the revision 1.40 changes to PHSNA for Windows. A number of these changes were made byIgnacio Cembreros, EB4APL or by the two of us working together. Stopping an endless sweep This

No, you can't see those line control bytes, which does make it hard when a plain text file is messed up. It's nothing you could have seen. You have to look at the file with something called a hex edit

Wow, you have a strange looking parameters.txt file indeed. Some text files have a linefeed (10) and a carriage return (13) character at the end of each line. Some have only a linefeed (I think). Your

I may have seen that error before. One thing to know is to not have additional carriage returns (blank lines) at the end of parameters.txt. The memories.txt file is for the convenience of having store

My PHSNA setup usually doesn't produce RF output on initial power up until I either click the RESET button on the Windows PHSNA app or press the hardware reset button I included in my build. Either on