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Hi guys, new here. Where would I find a link to the store for the 20w pa board kit? -- Mike - K8MCB

All: I just read that the RP Pico 2 is now capable of running at 200MHz, up from 133MHz earlier. Using CMake, the new speed setting in the compiler is a symbolic constant: PICO_USE_FASTEST_SUPPORTED_CLOCK=1. I don't know if the Arduino IDE recognizes this or not. There's been interest here in using the Pico as a second I/O processor in the T41. The Pico W has 26 I/O pins, 2Mb of Flash, and WiFi/Bluetooth support. No price was given for the Pico 2 nor did it say anything about WiFi/Bluetooth support, but the standard Pico W is about $8-$10. If I see additional info, I'll post it here. Jack, W8TEE -- Jack, W8TEE

I’m back from vacation… so I can ship parts/ boards/ kits/ etc. again now. Go ahead, let me have it. POW! Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. email: bill@...

To follow up: “The United States Postal Service announced Tuesday night that it is temporarily suspending accepting packages sent from China and Hong Kong until further notice. The suspension is effective immediately, the USPS said. Letters and flats are not included in the suspension, it said.” USPS temporarily suspends accepting packages from China and Hong Kong Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. email: bill@...

Huh.... I also use a separate data server (with a hot spare... dual connections to drives that are mirrored) using Samba to backup all of my files (for my business)... and our 96TB video server in the house. I've got an old Dell tape drive that I make incremental backups as well. Looks like some of us are scared of data loss! Looks like you should be able to get you data back to at least a week ago... Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. email: bill@...

I attended an online seminar/ instruction/ discussions today (with a friend of mine) regarding power supply devices and I learned a lot. First off 7805 voltage regulators are very noisy… in fact generate 40nV of noise at best. That noise gets into the A/D and D/A so with a 24 bit A/D with resolution of 298 nV (on 5V… its worse on 3V being 179nv)m that 40nV gives you a much higher noise floor and less dynamic range. Buck/boost regulators are far worse. There are ultra-low noise regulators that should be used with projects that use high resolution A/D and D/A converters in radios… like the LT3042 and LT3042 that are about 80db below a linear regular in noise generation. They are about 10x more expensive than the 7805 series regulators, but are critical to low noise floors. As a result, when I get time (and that may be years from now)… I’ll make some measurements on the T41 hardware for absolute noise floor and then sub in these low noise regulators and see what I measure. [nb. my thought would be to make small vertical boards with these low noise regulators on them… which are flat packs… to simply replace the 7805 type regulator with heatsink]. Lots to do. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. email: bill@...

I was wondering what the preferred method is to connect the key, PTT panel jacks to a V11 board. Thanks Howard VE3HBH

All: The final version of the code is about to be released by Al and I and we are turning it over to Oliver to care for it in the future. There are coding style differences that some people will disagree with, and that's fine. Jerry has be active in working with the code and prefers another style. What follows is my response to some of the questions he raised. ============= It is kinda a matter of choice and style. As to finding function prototypes, I have tried to maintain those alphabetically in the SDT.h header file. I've done the same for globals. The problem is that more than one person is editing the code and header file(s). Also, you landed on one of my pet peeves: the confusion between the terms "define" and "declare". They are not the same terms. You said: A class definition doesn't assign storage. That is incorrect. From the 2nd edition of the K&R C book, page 210: Declarations specify the interpretation given to each identifier; they do not necessarily reserve storage associated with the identifier. Declarations that reserve storage are called definitions. The first sentence above means that a declaration creates an attribute list for each variable and stores it in the symbol table. Because declarations do not allocate storage for the variable, that attribute list will NOT contain an entry that specifies where in memory to find that variable. This memory location is called the lvalue of a variable. (What a variable contains is called the rvalue. The terms lvalue and rvalue are likely hangovers from assembly language programming for location (lvalue) and register (rvalue) concepts.) It is only after a definition of the variable that it has an lvalue that can be added to the attribute list found in the symbol table. If anyone still thinks they are the same, then have them explain the need for the C extern keyword. The extern keyword was created specifically because of the need to use a variable in one file when it is defined in another file. The data declaration in one file: extern int myVariable; says to the compiler: "I know this variable is not defined in this file, but you can assume it's an int variable named myVariable and it is defined elsewhere in the program." Think of the compiler generating the code for the variable but instead of suppling the variable's lvalue, it leaves "????" in the generated code where the lvalue should be. Then, in the Arduino environment, in the INO file we find the definition of myVariable: int myVariable; which is the program statement that defines the variable myVariable. This definition allocates storage and allows the compiler to fill in the lvalue for this variable in the symbol table. Now, after the compiler finishes, the linker comes along looking at the generated code from the compiler and sees the ???? marker in the object file, looks in the symbol table for ???? in the symbol table, and substitutes that variable's lvalue for the ???? marker. When it's done with that, the linker continues to stitch in the code from the libraries and any other extern declarations to generate the final program code. Using the terms define and declare as if they are the same concepts is wrong, but most programmers fail to make the distinction. Indeed, even Microsoft's documentation treats the two terms the same. Programming is confusing enough without confusing the terms that are integral to it. Jack, W8TEE On Saturday, February 15, 2025 at 10:59:24 AM EST, jerry <jerry@...> wrote: I'm not a fan of this coding approach where class methods are defined > in a header file...I just don't like to see executable code in a > header file. Nor do I like the idea of each cpp file having it's own > header file. I just seems like clutter to me. On the other side, I > think this was written by Paul and I have the utmost respect for his > code. Kinda a rock/hard-place for me. > > Jack, W8TEE I OTOH like the idea of a matching header file for each .cpp file. Having everything in SDT.h seems.... like clutter. Lots of scanning up & down in that huge file. How to find the prototypes to call stuff in CAT.cp

Anyone here have a RX-888 MK-II SDR working? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. email: bill@...

I presented the Right-Left Rule in the C Programming Guide book (1982) and there have been lots of examples written since then. This is a list of example you might use to test your understanding of the Rule, including some illegal data definitions: Here are some legal and illegal examples: Jack, W8TEE int i; // an int int *p; // an int pointer (ptr to an int) int a[]; // an array of ints int f(); // a function returning an int int **pp; // a pointer to an int pointer (ptr to a ptr to an int) int (*pa)[]; // a pointer to an array of ints int (*pf)(); // a pointer to a function returning an int int *ap[]; // an array of int pointers (array of ptrs to ints) int aa[][]; // an array of arrays of ints int af[](); // an array of functions returning an int (ILLEGAL) int *fp(); // a function returning an int pointer int fa()[]; // a function returning an array of ints (ILLEGAL) int ff()(); // a function returning a function returning an int (ILLEGAL) int ***ppp; // a pointer to a pointer to an int pointer int (**ppa)[]; // a pointer to a pointer to an array of ints int (**ppf)(); // a pointer to a pointer to a function returning an int int *(*pap)[]; // a pointer to an array of int pointers int (*paa)[][]; // a pointer to an array of arrays of ints int (*paf)[](); // a pointer to a an array of functions returning an int (ILLEGAL) int *(*pfp)(); // a pointer to a function returning an int pointer int (*pfa)()[]; // a pointer to a function returning an array of ints (ILLEGAL) int (*pff)()(); // a pointer to a function returning a function returning an int (ILLEGAL) int **app[]; // an array of pointers to int pointers int (*apa[])[]; // an array of pointers to arrays of ints int (*apf[])(); // an array of pointers to functions returning an int int *aap[][]; // an array of arrays of int pointers int aaa[][][]; // an array of arrays of arrays of ints int aaf[][](); // an array of arrays of functions returning an int (ILLEGAL) int *afp[](); // an array of functions returning int pointers (ILLEGAL) int afa[]()[]; // an array of functions returning an array of ints (ILLEGAL) int aff[]()(); // an array of functions returning functions returning an int (ILLEGAL) int **fpp(); // a function returning a pointer to an int pointer int (*fpa())[]; // a function returning a pointer to an array of ints int (*fpf())(); // a function returning a pointer to a function returning an int int *fap()[]; // a function returning an array of int pointers (ILLEGAL) int faa()[][]; // a function returning an array of arrays of ints (ILLEGAL) int faf()[](); // a function returning an array of functions returning an int (ILLEGAL) int *ffp()(); // a function returning a function returning an int pointer (ILLEGAL) -- Jack, W8TEE

I have a couple of the 3.3V ONLY display boards prebuilt and I want a couple of volunteers to test them out. They have to be: 1) people with working radios, and 2) have displays that misbehave (meaning if you move them around, elongate the cable, etc… the processor locks up). I don’t really have the problem so its hard for me to fully evaluate if the display driver boards completely solve this issue. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. email: bill@...

I looked at pin 24 on Tweensy, Daudio-Out that goes to U5 audio processor. There is a signal there but it does not look any thing like a digital signal, I do see an occasional spike that coinsides with pulse I hear in headphones. Anyone ever looked at the D-Audio output from Tweensy with a scope to see what it looks like? Tim W4YN