On Aug 16, 2022, at 11:54 AM, david todd via groups.io <ac9xh@...> wrote:

?Justin ,i went to their website and it looks like a keyer.


its something i wouldnt install in my ubitx v6 but to each their own.probably has a decoder for those who like to send way faster than they can copy cw.HI HI.
Im a purist. decoders for cw are an insult to the cw community as a whole if you operate cw.this is from their website:K3NG’s arduino code, such as LCD display, USB keyboard, rotary encoder and CW decoder etc.

looks nice for shortwave listeners who like to tune in those secret signals, but just my opinion,? my decoder is my ears. you always know someone is using a decoder when there is a little bit of adjacent noise and the decoder cant tune it in. even though your signals and theirs are 599.

decoders for those who try to appear to copy way way faster than they are able to.sometimes they use the programmable keyrs to make canned contacts too.Sometimes "SOME" those who use decoders? are the ones who apply for fast code decoding awards from the ARRL w1aw bulletins.

73
David
ac9xh

On Aug 16, 2022, at 7:16 PM, Richard Spohn <wb2gxm@...> wrote:

?

David, this is really, really sad. Your friend is missing out on so many things -- the thrill of learning and developing new skills, the joy of conversing in a new language, not to mention the brain-building and brain-health maintenance that CW provides to its practitioners. And one more loss -- I, for one, will NEVER have a meaningful QSO with him. -- Rich WB2GXM

------ Original message------

From: david todd via

Date: Tue, Aug 16, 2022 4:19 PM

To: [email protected];

Cc:

Subject:Re: [BITX20] Funtronics uBitx digi interface installation in V6

last point of my opinion, and i apologize if i come across as a hater,but im not.

Friend of mine is a no code ham. he learned the basics of the code and uses a decoder to decode the cw. he sends about 20 wpm with his paddle ,which doesnt make sense because he cant copy past 6 wpm with his ears. i proved this with on air copy. doing about 8 to 10 wpm. he said he couldnt copy it even though he sends really fast. he doesnt try to decode the cw in his head since the decoder is doing it for him. I told him if you can send 20wpm you should be able to receive faster than 8. no way. i had 3 other hams verify this. WEIRD,BUT TRUE.He stated"why learn to copy faster when i have my decoder. he uses software to do this on his not knocking him,but i did explain the reasonings of not using one.happy he is trying cw and using it,but the decoder gives him a false sense of accomplishment. he has been using this setup for several years and still cant copy faster than about 6 wpm. WEIRD ISNT IT. My friend is an engineer for 30 years, very very smart, but has been ruined by his decoder. HI HI.3 of us have been working with him with various,various methods, and we even paid for his classes,etc just to be friendly. he went,but the instructor stated "ive never seen anyone who can send 20wpm and not copy by ear at least over 6 wpm. He refuses to try to fill his head with the decode but can send 20 wpm with his paddle. foud out some of his secret. he uses precanned groups of statements. qth,radio,rst,etc. He goes thro the motions and then after his decoder decodes the other hams info he clicks the statements he wants sent next,it also includes the 73,etc. .very canned,very brief, using decoder and software on computer.? is he running cw? yes,but with an analog radio and no goodies attached to it,like a decoder,he is dead in the water without it.Ive praised him over and over for trying CW,but He stated "i can make 1000s of cw contacts and basically not even know CW"The computer and decoder will do it all for me.His words,not so his paddle is basically for looks. he uses computer control to do the sending 99% of the time.

please inform the other end u are using one if you cant decode the signals when adjacent qrn,qrm,qsb affects it or you are in a is leads to abrupt endings of qsos. or qsos that really seem robot operated.I ran into this when doing ft8. Someone calling cq forever and not responding to others who respond to their CQ.

just my own opinion of it.


73
David
ac9xh

On Aug 16, 2022, at 22:43, David McGaw <david.g.mcgaw@...> wrote:

? Indeed.? Like many things, true in the limit.? A toroid with just a few turns does have significant stray fields, but better than a solenoid coil.

D

On 8/16/22 7:39 PM, Ashhar Farhan via groups.io wrote:

David,

I did a bit of experimental work on this. The toroids need more than 15 turns or so for the self-shielding to work well.

At fewer turns, the shielding though better than that of a conventional inductor, wasn't good enough to be used in a bandpass filter. In the Daylight radio, I had to add shielding between the three sections.

- f

On Tue, Aug 16, 2022, 11:48 PM David McGaw <david.g.mcgaw@...> wrote:

Yes, understood.? Just thought I would let it be known that it is not the core that shields a toroid.? It is inherent in its shape.? Physics.? :-)

On 8/16/22 9:49 AM, Ashhar Farhan via wrote:

David,

Shielding is not the issue. Losses are. Lower Q leads to higher losses. The Q is determined by the material inside the toroid. Air/Vacuum is the best material with least losses for an inductor, whether a solenoid or a toroid.

On Tue, Aug 16, 2022, 6:23 PM David McGaw <david.g.mcgaw@...> wrote:

Toriodal inductors are inherently shielded by their geometry, no matter what the core material is, air, ferrite or other.

73,

David N1HAC

On 8/15/22 8:24 PM, Ashhar Farhan via wrote:

David,

The inside of the toroid should be hollow and it not hollow it should have as little in-fill as possible. This is the key to high performance 3D printed toroids. PLA or ABS are lossy and they can lead to lossy filters.

- f

On Tue, Aug 16, 2022, 4:16 AM Siegfried Jackstien <siegfried.jackstien@...> wrote:

would not a simple tubing do the same?? .. the "shielding" of a coil wound on a ferrite core comes from the core material ... so i guess a normal pastic tubing will work equally well if not better (fewer loss cause fewer plastic inside the coil)

so ... what is the reason to print plastic toroids??

dg9bfc sigi

Am 15.08.2022 um 23:50 schrieb David R. Hassall WA5DJJ:

Dear group,

I asked a friend of mine to build a master toroid stl file that we can put in our 3D printer software and come up with the plastic toroids almost any size we want.?? The Master was built on the basic size of 1 inch in diameter with a height of 1/2 inch and a thickness of? 0.2 inches.?? I use the CURA program to build my 3D printer files and it will allow me to scale all three axes once the basic 25mm toroid.stl file is loaded into the software.? It also allows you to print almost any number of a basic design in one printing.?? Here are some examples that I printed this morning:

I just used the scaling values of 25%, 50%, 75% and 100% to get the different sized plastic toroids pictured above.? So with the master stl file anyone with a 3D printer should be able to print almost any size plastic toroid form that you would need.?? I have attached the master stl file to this Message and it should enable anyone with a 3D printer to make the plastic Toroids that they need for the Daylight Radio Project.

Take care and have fun.

73 Dave WA5DJJ
SUPER QRSS GRABBER