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I have a few W8BH Morse Tutor boards available for shipping costs+ (Had to order 5, used one) Gary W9TD

Hi Bob and all By way of introduction, I'm a local friend of Bob's, WA7EXH since 1965, and a reader of this group. Bob, since I last talked to you about this, it's occurred to me that most of my

Hi Phil- I don't know if there is a performance difference between QSE2DC and the V12 circuit.? There is insufficient data available for comparison. Yes, carrier nulling is a software task which has

Hi Greg Is there any difference in performance of QSE2DC and the V12 circuit other than the nulling capacity? Nulling is a software task? I notice your use of the differential "op amps" for the

Hi John Looking forward to your performance results... I haven't yet built an RF board, been stuck on toroids and other things, so would consider your RF board. Regards Phil VK2KKZ

PCBWay was still offering the Global Express a couple weeks ago when I placed an order for something else. JLCPCB had just stopped it that day. They told me it was because their Global Express carrier

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