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Ive always used DHL -- John P. WA2FZW

*** That's not a big deal. The big deal is that their "Global Standard Line" $1.50 shipping went away, replaced by $22 DHL shipping. - Jerry, KF6VB

I checked the JLCPCB price a month or so ago. $4 for 5 boards up from $2. Not a big deal. -- John P. WA2FZW

I just asked my search engine to list US-based PCB manufacturers. The list contains 484 names. However, none comes close to the prices offered in China (e.g., PCBWay, SeeedStudio Fusion, etc). They

Interesting points!? What I have observed with the 3253 is that degradation is noticeable at 10M.? Still good enough though.? It looks worse at 6M What I am referring to is the 3253 in the role as

Yup, I built the MCT on a solderless breadboard.? My plan was to make a pcb.? Full disclosure, something shiny distracted me and...

I didn't build the Morse Code Tutor, but I did build the CW Messenger from chapter 10.? I built it on a protofboard. I'm sure the Morse Code Tutor build would be similar.

Thanks to everyone for the fast feedback. To answer questions in order: 1) Yes, I plan to release hardware and software files to this site as others have done. If there is demand, perhaps Bill can add

Three fresh AA alkaline batteries in series will produce at least 4.8 volts, plenty for your test.? Three freshly charged NiMH batteries probably won't. 73, John, AA0VE

It would be interesting to do *a battery experiment* , but it is tricky to do.?? The voltage, per spec, should be 4.5 to 5.5 V.? Three AA's, when new, should do that, but barely.?? A question

The short answer is that the 8-bits, or at least part of them are useful.? I'm attaching a plot of the output of the PCM1808 while receiving "no signal" to help explain what is happening. The magenta

Thanks Jack, Doug and Terrance! Assuming I decide to pursue having a PCB made, what are the current challenges (if any) using the available board manufacturers? Are they still mostly in Asia, and how

Just had a look at what the Si5340 is. It will have a place in high performance radios, but it's not going to replace the Si5351 in all applications. It's a much more expensive part; the cheapest

If the Si5340 has a mode with 180 degree outputs, then a very trivial change to the flip-flop circuits will allow divide-by-2. That gets you to 6M with ease.? Also note that John is using the LVC

Hi John- That looks really excellent! I note that you have independent outputs from the 5340 to the QSD and QSE.? That means there is a good chance that automated transmit calibration will work! The

You know, the other benefit of this approach is that you can use the fourth output for RX2 and that could easily be a second RX chain placed as a daughter card. Has me thinking. Dr. William J. Schmidt

I like that part a lot and have used it for several things. The only downside side is that you must iss 7474’s to generate the quadrature, and while it covers the MF and LF frequencies in a better

Bruce has a groups.io ( /g/w8bhMorseTutor ) for the Morse Code Tutor.? It has a link to his GitHub ( https://github.com/bhall66/morse-tutor ) that seems to have all of the needed

W8BH did put gerbers on his github as linked from http://w8bh.net/ https://github.com/bhall66/morse-tutor

Hi Vern: Good for you!! It's never too late to learn CW. BTW, the G4FON software (http://g4fon.net/CW%20Trainer2.php) is very good for learning, too. (The video is worth watching.) It uses the Koch