I also built the excellent Emtech ZM2. One thing to remember with the sBitx is that the power out can be way above QRP tuner limits. For example the 4SQRP tuner limit is 10 watts, easily exceeded by the sBitx on lower bands if you're not careful.
?
? 73
??? Bob? KD8CGH
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Hi Ashhar,
What method do you use to route the audio internally on the RPi for third party apps ?
I know there are a few options to do this such as pulseaudio and jack and so on but it would be good to know who exactly you have done it and probably something?worth adding to the user guide at some point.
Best regards, Peter.
On Mon, 1 Aug 2022 at 09:42, Ashhar Farhan < farhanbox@...> wrote: Dave, If you see the first video, you will notice that as soon as the cw signal is filtered in, it has no ringing and weak signal is an armchair copy. That took some doing. The rx qudio is pleasing too, that doesn't fatigue you. Above all ku frustration with getting external programs going with ubitx is a big reason for sbitx. If I switch it on, I change the mode and just go! Surely, there will be others who will do contesting (this radio is contest grade hardware all the same). The user interface can be rewritten any which way. I hope people smarter than me will find easier interfaces for it. - f
On Mon, Aug 1, 2022, 2:03 PM David Wilcox K8WPE via <Djwilcox01= [email protected]> wrote: Asher,
These words ¡° We must make this easiest radio ever. Think sedan instead of an F1 racing car. Radio manufacturers have long forgotten the art of making comfortable radios like the Drake TR-4s. It is upto us to build it for ourselves.¡± are some of the nicest words I (a 77 y/o retired medico) have heard in a long time.? I may even be tempted with this radio.
Dave K8WPE since 1960 and still trying to learn radio¡¡
David J. Wilcox¡¯s iPad
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Hello Somnath,
Please contact support@... and send us the transaction details and I am sure we will be able to help you.
Thanks,
Thomas
On Mon, 1 Aug 2022 at 14:52, Somnath Dey < deynet@...> wrote: Today i received the Antuino, switched it on and there is only a green screen. Really frustrated.
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Support@...
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Today i received the Antuino, switched it on and there is only a green screen. Really frustrated.
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? Aaron,
You will be very happy with your 4SQRP tuner. I built one and it was as good as my Emtech and other QRP tuners. I had too many that I have built over the years so I gave it away. ?Reading about antenna tuners is easy so learn what they are and how to use one. That is part of ham radio.
Dave K8WPE since 1960 David J. Wilcox¡¯s iPad
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On Jul 31, 2022, at 2:11 PM, Aaron K5ATG via groups.io <k5atg@...> wrote:
?On Sun, Jul 31, 2022 at 12:47 PM, Stephen KO4CVU wrote:
Emtech ZM-2 manual tuner
Someone gave me a non-working Four State QRP Group??that at first glance looks like all of the parts are there. I need to get with David NM0S and get it figured out.? ? -- '72
Aaron K5ATG
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Dave, If you see the first video, you will notice that as soon as the cw signal is filtered in, it has no ringing and weak signal is an armchair copy. That took some doing. The rx qudio is pleasing too, that doesn't fatigue you. Above all ku frustration with getting external programs going with ubitx is a big reason for sbitx. If I switch it on, I change the mode and just go! Surely, there will be others who will do contesting (this radio is contest grade hardware all the same). The user interface can be rewritten any which way. I hope people smarter than me will find easier interfaces for it. - f
On Mon, Aug 1, 2022, 2:03 PM David Wilcox K8WPE via <Djwilcox01= [email protected]> wrote: Asher,
These words ¡° We must make this easiest radio ever. Think sedan instead of an F1 racing car. Radio manufacturers have long forgotten the art of making comfortable radios like the Drake TR-4s. It is upto us to build it for ourselves.¡± are some of the nicest words I (a 77 y/o retired medico) have heard in a long time.? I may even be tempted with this radio.
Dave K8WPE since 1960 and still trying to learn radio¡¡
David J. Wilcox¡¯s iPad
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Asher,
These words ¡° We must make this easiest radio ever. Think sedan instead of an F1 racing car. Radio manufacturers have long forgotten the art of making comfortable radios like the Drake TR-4s. It is upto us to build it for ourselves.¡± are some of the nicest words I (a 77 y/o retired medico) have heard in a long time. I may even be tempted with this radio.
Dave K8WPE since 1960 and still trying to learn radio¡¡
David J. Wilcox¡¯s iPad
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Alan, The "Development Edition" is a bit of a misnomer. It doesn't mean that there are big bugs. Rather, this version is all large PCB and configured with all the tools needed for builders and software hacks to poke and see and code.? Unlike the closed software (like the Xeigui?SDRs), the bugs will be welcome and fixed pronto. The update is trivially easy. You just have to put the radio online (wifi or ethernet) and type "git pull" to pull the latest version from the repository. No need to learn to program. I am also rethinking the layout. I think that the keyboard should stretch the entire length of the display for butter fingers like me. Anyway, it will take a fair amount of inputs from early users to get the UI done. We must make this easiest radio ever. Think sedan instead of an F1 racing car. Radio manufacturers have long forgotten the art of making comfortable radios like the Drake TR-4s. It is upto us to build it for ourselves. - f
On Mon, Aug 1, 2022 at 1:41 PM Alan Cooper < cqw7aln@...> wrote: Ashhar,
I have to hand it to you.. that is one beautiful looking radio.. I am going to wait for some of the bugs to work their way out of it but there is going to be one of those in my future I hope.
Alan W7ALN
On Mon, Aug 1, 2022, 12:20 AM Ashhar Farhan < farhanbox@...> wrote: I recorded a video of FT8 operation with the sBitx.? it is here:
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Ashhar,
I have to hand it to you.. that is one beautiful looking radio.. I am going to wait for some of the bugs to work their way out of it but there is going to be one of those in my future I hope.
Alan W7ALN
On Mon, Aug 1, 2022, 12:20 AM Ashhar Farhan < farhanbox@...> wrote: I recorded a video of FT8 operation with the sBitx.? it is here:
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I recorded a video of FT8 operation with the sBitx.? it is here:
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Jack
Wow you are quite the wizard with coding, construction and maybe parts sourcing. Thanks for showing. Yeah the best variable capacitors might be as old as us.?
I didn't want the perhaps more recent op to think he needed a fantastic tuner to operate where his efhw already has low swr. That was the message of those who posted before me, or at least intended. Yeah we each have our opinions on tuners, but most can get us close to the center of the Smith chart while usually leaving enough power to radiate. Wow enjoy passing RF through your creation.?
Curt
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Curt:
I've been reading a lot of posts about antenna tuners and I've looked up what they cost. Not cheap by any stretch and most are 10W max! As I recall, this one:  cost me about $40 to build, but I had the caps on hand.
Jack, W8TEE
On Sunday, July 31, 2022 at 10:13:51 PM EDT, Curt via groups.io <wb8yyy@...> wrote:
Aaron
I confess I routinely operate into something like 1.6:1 especially if I know the feedline has a reasonable loss to the antenna. One of my antennas is an EFHW. Do gather its SWR across bands so you know where it's reasonable.?
You can make plenty of contacts while figuring out that tuner. It may be a bad connection somewhere or a backwards diode or insulation not removed from a coil. Trust you can figure it out when you study it systematically.?
Coax fed antennas don't do well operated into very high SWR. Well above 2 generally the antenna needs adjustment. A tuner with a coax fed antenna works decently to adjust moderate swr. At something like 1.6 you don't need the tuner. Much above 3 the tuner may not work so well.?
Enjoy your radiation.?
Curt wb8yyy?
-- Jack, W8TEE
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Aaron
I confess I routinely operate into something like 1.6:1 especially if I know the feedline has a reasonable loss to the antenna. One of my antennas is an EFHW. Do gather its SWR across bands so you know where it's reasonable.?
You can make plenty of contacts while figuring out that tuner. It may be a bad connection somewhere or a backwards diode or insulation not removed from a coil. Trust you can figure it out when you study it systematically.?
Coax fed antennas don't do well operated into very high SWR. Well above 2 generally the antenna needs adjustment. A tuner with a coax fed antenna works decently to adjust moderate swr. At something like 1.6 you don't need the tuner. Much above 3 the tuner may not work so well.?
Enjoy your radiation.?
Curt wb8yyy?
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Re: A short video of sBitx working
John, You must have seen that the video has a jump at 8:25. I switched to FT8 at that point, tuned around for about 2 minutes but 21 MHz was surprisingly quiet. I had to snip out that uninteresting part. I will get one recorded today. Usually 21MHz is bustling with FT8 activity during the day. - f
On Mon, Aug 1, 2022, 4:11 AM John AE5X < ae5x@...> wrote: Thanks for the video. Any chance of one showing the FT8 functionality in action?
73,
John AE5X
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The display you are looking for is the official Raspberry Pi display; that's the one the kit is designed for. Digi-Key currently has a bunch of them:? ry-pi/8997466/6152806
is also the correct display. The distinguishing mark is the Raspberry Pi logo in the center of the board that is attached to the back of the display.
The displays get redistributed by a number of companies. For example, I have one that I got at Micro Center a while back with the OKdo brand on the box. That's the one I plan to put in my sBitx. I have also seen them from element14 and RS. So long as you are getting the official display it doesn't matter which brand is on the package.
To answer another question in the thread, you can use any Raspberry Pi 4 with at least 2 GB of RAM. The sBitX software doesn't require more, but a 4 GB or 8 GB Pi will work just fine. Ham radio software isn't large for the most part so you're unlikely?to need the additional RAM even if you experiment with?running other?concurrent applications, but it doesn't do any harm other than cost extra.
On Sun, Jul 31, 2022 at 7:30 PM < msamis@...> wrote: I was looking over the Github site.? If we purchase the $299 version, is there an image for the Pi that can be downloaded and includes the OS and everything else, or do we need to load the RPi OS and compile and install the rest of the software? I did read the install.txt file, but it was a year old and did not seem complete. Thanks for your help.
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Thank you!? This is perfect.
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?There is a link on this page.
On Sunday, July 31, 2022, 06:30:39 PM CDT, msamis@... <msamis@...> wrote:
I was looking over the Github site.? If we purchase the $299 version, is there an image for the Pi that can be downloaded and includes the OS and everything else, or do we need to load the RPi OS and compile and install the rest of the software? I did read the install.txt file, but it was a year old and did not seem complete. Thanks for your help.
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I was looking over the Github site.? If we purchase the $299 version, is there an image for the Pi that can be downloaded and includes the OS and everything else, or do we need to load the RPi OS and compile and install the rest of the software? I did read the install.txt file, but it was a year old and did not seem complete. Thanks for your help.
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Re: A short video of sBitx working
Thanks for the video. Any chance of one showing the FT8 functionality in action?
73,
John AE5X
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Re: A short video of sBitx working
Great video. I love the feature for using a keyboard do send CW -- '72
Aaron K5ATG
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Bob Benedict, KD8CGH
Shirley Dulcey KE1L
Aaron K5ATG