开云体育

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

Very interesting, John. Do you plan to release the Gerbers for the board and the supporting software? Please keep us posted on your progress going forward. Jack, W8TEE

Greetings All, I don't see much mentioned lately regarding the MCT, but having recently purchased the 'Microcontroller Projects for Amateur Radio' book (via Amazon); I've decided I would like to build

In the spirit of posting efforts currently underway, I have been working on a new RF board and associated driver software. In a nutshell, the new board uses the Skyworks SI5340 instead of the SI5351.

FYI for those going. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton -

One thing you could do is power your ADC from a battery. That will be the reference test case. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal

Were the extra 8-bits from the PCM1808 useful?? Paul showed they weren't from the Audio adapter. My F32 quad objects are ported from the Audio library and work fine as I16 to F32.? They are limited

The modified SI5351 library is needed to tune less than 3.2MHz.