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You gonna be at Hamvention? If so, stop by Booth #2607. Al may be there too depending when people come. Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner -

John, look up UHFSDR (WB6DHW design ) for another approach. I built one, have another in a partly built state. It works well, I get UHF performance. I paired it with an EdenDSP 3.0 board. Larry KB3CUF

Hi Bill, I would love to see your simple design. I too have thought about replacing the '3253 with discrete FET switches, but getting very fast switching speed *and* suitable RF performance appears

No one seems to consider this but you COULD build analogs of these devices using high frequency discrete parts. I have something like breadboarded as a replacement for the mixer… it works but needs

I think that changed again. Seems to change from day to day at this point. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC

Gary, I'd like to try one of your boards, if you have any left. Let me know how to proceed. -- This email has been checked for viruses by Avast antivirus software. www.avast.com

Hi Gary, I'm game for one (maybe two) board(s). Contact me off-list and maybe we can help each other out... Thanks!73,Vern N7GTB (at yahoo)

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.