Hi Hylton,
Each user may control their own email/attachment preferences.? Just click the "Subscription" link on the left menu, then click on the drop-down arrow for "Advanced Preferences".? In this section, you can choose your attachment size limit to receive, or even set it to zero bytes.? Then the attachments will only appear as downloadable links.
Cheers and 73,
Mark
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Re: sBitx #sBitx PA MOD Plan
#sBitx
Mark,
Generally space is not the issue, though its just being courteous.
I've seen way too many fuzzy and other marginally useful
pictures.? That prompted my comment.
Allison
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Please use the forum, offline and private will go to bit bucket.
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Re: sBitx #sBitx PA MOD Plan
#sBitx
And a side note,
JPEG has excellent compression methods; a file compressed at a quality level of 60 will still look excellent but will save 3-4x the space and download faster.
73,? Mark
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Re: What's New? NANO every
Size as the mega is only the older uno size board...
Price is not the issue usually as people are hanging expensive
displays and what not.
For a lot of stuff the Nano EVery was a solver for me as it fit the footprint.
Less EEprom for the aps i do it not an issue.
If the number of write cycles are low I think flash can be used as well.
Allison
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Please use the forum, offline and private will go to bit bucket.
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Re: What's New? NANO every
Allison,
I had wondered that too. Must be one or more of price/size/heat/power issue?
73
Mark
AJ6CU
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Re: sBitx #sBitx PA MOD Plan
#sBitx
I will combine two comments.
Since the mod manual will be likely electronic, the size of the images relative
to the page is not as important as resolution.? ?That makes it easy to bring up
the page and seriously enlarge it for detail on the screen.
That means lots of photos, at high resolution, and most importantly in focus for
the area of the board discussed.? Enlarged and fuzzy is not useful.
Further the result should have updated legible schematics.
Allison
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Please use the forum, offline and private will go to bit bucket.
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Re: What's New? NANO every
What's interesting is the Arduino mega was passed over
completely. With more IO and 250K of flash,more ram and
EEprom yet for work that otherwise fits the 8bit realm it
was passed.
Not knocking the 32bitters but they eat flash faster,
and Eeprom is likely external anyway.? The got used because
they were ubiquitous or cheap.? For DSP or dsp like work
they are a better for for the math needed.
The Nano Every, gets some of that at the cost of EEprom
but its easy to add externally if it were really needed.
Allison
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Please use the forum, offline and private will go to bit bucket.
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Re: sBitx #sBitx PA MOD Plan
#sBitx
In the final MOD doc would you please make the photos full page.
John
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Re: What's New? NANO every
Dean
will give the encoder software a try in the Pico version. Will let you know how it works.?
I get why Dr Lee pushed so much functionality off onto the Nextion. He was trying to squeeze as much as possible into that poor nano.
I am hoping that with the newer processors we can reduce the lioad on the Nextion making the maintenance of those screens?much more doable (and perhaps supporting dumb lcds too). So will definetly take a look at how you did things in the future.?
73
Mark
AJ6CU
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Re: Arduino Nano RP2040 Connect
´¡»å»å±ð²Ô»å³Ü³¾¡
This one has been tested in a v6 and it fits (best not to include the lcd socket).?
Have not tried to fit the one with the external i2c connection into a v6 so there could be mechanical issues.?
73
Mark
AJ6CU
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Re: Arduino Nano RP2040 Connect
Yes, the software and voltage are the real issues. You might also worry about the pull-up voltage on the i2c bus.?
I have actually designed a Raduino board that could take nano,nano every, nano IoT, nano ble and the rp2040. See gitHub.com/aj6cu. ?I have a jumper for 5v vs 3.3 and another set for the Nextion display d8/d9 vs rx1/tx1.?
?
The main challenge is the software. The software serial library is a problem (the teeny serial provided by kd8cec doesn¡¯t compile and at least one of those platforms doesn¡¯t support the real software serial) so I moved the Nextion connection to hardware serial 1 with the required pin changes.?
Also the kd8cec uBITX memory manager doesn¡¯t work with the rp2060. So I am rewriting it¡
73
Mark
AJ6CU
?
?
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Re: Arduino Nano RP2040 Connect
Looking at the pinout diagrams, I don't see any conflicts there. But watch out for the voltage; the Nano is usually operated at 5V, while the RP2040 is a 3V3 chip and its inputs are not 5V tolerant.
Does anyone know whether the Arduino Nano in the uBitx 6 could be replaced with an Arduino Nano RP2040 Connect without any other hardware changes? I realize the software would have to be adjusted, but are there any pin conflicts that can't be resolved in code?
--
73,
Mark, N8ME
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Arduino Nano RP2040 Connect
Does anyone know whether the Arduino Nano in the uBitx 6 could be replaced with an Arduino Nano RP2040 Connect without any other hardware changes? I realize the software would have to be adjusted, but are there any pin conflicts that can't be resolved in code?
--
73,
Mark, N8ME
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Re: Linear amplifiers for UBITX6 and other QRP transceivers...
The 2nd?(and all even harmonics) are supposed to cancel out, so it is the 3rd?harmonic (and odd harmonics of which the 3rd?should
be the strongest) that are the most important, and the suppression is greater for the 3rd?harmonic.
? ? ? ?73, Dan
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You are welcome.? I have enjoyed radio for 57 years now, and I would like others to have an opportunity?to enjoy it too.
? ? ? ? ?73, Dan
Dan,
Many thanks for posting that!
The XDT-LPF200 does look promising, I may have to buy one.
Curious that 2'd harmonic suppression on 40m is only 22dB,
would be interesting to see if adjusting the inductors would help.
Jerry, KE7ER
On Sun, Nov 13, 2022 at 03:53 PM, Dan Eggers N7DE wrote:
I am including lowpass filter data for 3 lowpass filters.? The first is the XDT-LPF200 that I recommend you buy, and don't waste your time trying to build something.?
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Re: Linear amplifiers for UBITX6 and other QRP transceivers...
You are welcome.? I have enjoyed radio for 57 years now, and I would like others to have an opportunity?to enjoy it too.
? ? ? ? ?73, Dan
toggle quoted message
Show quoted text
Dan,
Many thanks for posting that!
The XDT-LPF200 does look promising, I may have to buy one.
Curious that 2'd harmonic suppression on 40m is only 22dB,
would be interesting to see if adjusting the inductors would help.
Jerry, KE7ER
On Sun, Nov 13, 2022 at 03:53 PM, Dan Eggers N7DE wrote:
I am including lowpass filter data for 3 lowpass filters.? The first is the XDT-LPF200 that I recommend you buy, and don't waste your time trying to build something.?
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Re: Linear amplifiers for UBITX6 and other QRP transceivers...
Dan,
Many thanks for posting that!
The XDT-LPF200 does look promising, I may have to buy one.
Curious that 2'd harmonic suppression on 40m is only 22dB,
would be interesting to see if adjusting the inductors would help.
Jerry, KE7ER
toggle quoted message
Show quoted text
On Sun, Nov 13, 2022 at 03:53 PM, Dan Eggers N7DE wrote:
I am including lowpass filter data for 3 lowpass filters.? The first is the XDT-LPF200 that I recommend you buy, and don't waste your time trying to build something.?
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Re: What's New? NANO every
Hi Mark,
I have to document because otherwise I forget!? The older I get the less I remember.? ? The rotary encoder borrows from a library by Ben Buxton from 2011 that I modified slightly.? It uses digitalread so no analogue silliness.? My implementation uses interrupts - which vary by device.? I have code for the Nano and the Nano Every.? I use a very simple increment/decrement algorithm for the encoder.? It works very smoothly and never misses.
I think I have mentioned before that Dr. Lee is a bit too clever for me.? I gave up on trying to figure out his Nextion implementation. I did some experimentation before settling on the Nextion library.? There is a fairly vocal group of "Nextion Library Critics" on the Arduino board. There are alternate libraries and approaches that all have their own problems and challenges.? I like the object oriented approach that Nextion took and find it pretty easy to use.? It is memory hungry, but if you look at the code, you'll see I didn't use many of the IDE objects directly - instead I just construct and send a simple command to update the screen.? I also don't do much processing on the Nextion.? ?I could probably do a bit more - but I find the IDE and programming environment a bit clunk and I generally prefer to keep the main program logic all in one place. That's partly how I maintain interface compatibility with multiple display types.? The one thing I did do in the Nextion was frequency scanning - that turned out to be easy and I didn't have to change code on the Arduino at all.
73,
Dean
KK4DAS
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Re: sBitx #sBitx PA MOD Plan
#sBitx
Thank you for the preview. ?Pictures, pictures, pictures! ?Show each section before, during and after modification. ?Each part of the board to be modified should be identified from a distance to help locate the area of interest and then zoom into the details. ?You might also discuss the best way to open the enclosure without damaging the finals. ?Details like wire size range for the various mods, suggestions of stripping length and pre-tinning those wires (which I know seems silly) are the ¡°Heath Kit¡± type of instructions that will help insure a successful modification process. ?A visor-mounted magnifying glass will be a must and perhaps a few words on how to safely remove/install a 1206 type component (iron heat suggestion, technique, etc.).
I know this is a lot of suggested detail but this is a fairly detailed operation. ?I think most will do fine but some will struggle. ?Give them more than they will need to be successful.
Cheers, Scott ??
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Re: Linear amplifiers for UBITX6 and other QRP transceivers...
David,
There is no challenge for me, or at least not accepted as one.
For me it just tech talk.??I find amplifiers and all things radio
interesting.??
Allison
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Please use the forum, offline and private will go to bit bucket.
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Re: Linear amplifiers for UBITX6 and other QRP transceivers...
Dan, Allison, This is fun. ?Just watching a discussion turn into a challenge and growing from there. ?Some will bite on this project and learn so much. ?I will follow and see just what comes of it. ?I am still in the ¡°buy the complete kit that someone else has offered and done the designing and trouble shooting¡± phase of ham radio but we all have fun no matter where or how we get to our destination. ?Thank you to all involved.
Dave K8WPE? David J. Wilcox¡¯s iPad
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Show quoted text
On Nov 13, 2022, at 9:01 PM, Dan Eggers N7DE <N7DE@...> wrote:
?
I have done all I can.? I am now too old to do anymore, so please carry on, and I hope that you people can make a nice inexpensive 50-watt transceiver for those who are just starting out in Amateur Radio.
May the Lord bless you and keep you, may he make His face to shine upon you and give you peace.
? ? ? ? ?73, Dan, N7DE
requirement was 43 Db down below 30 MHz, but above 30 MHz it is 50 mw or 40 Db down.
Dan,
That is incorrect.? For under 30 mhz is correct -43dbc maximum.
For? VHF it is more stringent and the numbers are like -53dbc or
50mW max.? Generally you want 3db headroom over that to allow
for testing and other variations.
I'm familiar with the 'EBY filter.
All the filter I need I build as needed and to the power level anticipated.
the I get the size I need rather than what's offered.
Also GROL license/signoff is not needed for ham use unless its
for a commercial build.? I did a fair amount of that and certification
testing.
Eb63 the realy used was terrible and many of the "subs" were worse.
Splitting the relays was a better way to go and more stable.? For the
input Omron G6 series are a favorite.? For output the Omron G2R
was easy to get and fine to about 6M.
Allison
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Please use the forum, offline and private will go to bit bucket.
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Shirley Dulcey KE1L
Mark Erbaugh
David Wilcox K8WPE