Btw, I was thinking in adding NBFM. Did anyone already implemented it?
- Rafael
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On 9/13/24 7:48 AM, JJ - W9JES wrote: The link contains information on downloading our version and/or image. It contains AM RX and TX.
Here is an example of RX in the AM broadcast band. It also works as TX/RX in the amateur bands.
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Hi JJ,
Which sbitx's fork are you using in your image?
Best regards,
Rafael PU2UIT
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On 9/13/24 7:48 AM, JJ - W9JES wrote: The link contains information on downloading our version and/or image. It contains AM RX and TX.
Here is an example of RX in the AM broadcast band. It also works as TX/RX in the amateur bands.
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Re: Upgrade to "sBitx 64 bit v3.1 - BTS"
On Sep 12, 2024, at 8:49?PM, Sam Hanie <SAMHANIE@...> wrote:
Any way to upgrade to "sBitx 64 bit v3.1 - BTS" without wiping out my Raspberry Pi configuration?
On Sep 13, 2024, at 8:57?AM, JJ - W9JES <w9jes@...> wrote:
You can also tryout 64Bit BTS using this method via a USB flash drive..
?
Why don’t you set up a repo for some custom Debian packages so that apt-get upgrade is enough? ?Reimaging and starting over has been unnecessary for a long time now on most Linux distros.
Of course the fact that sbitx is open-source is the reason I got one, and it needs to stay open source. ?Having the source there in the home directory for easy inspection and experimental builds is awesome too. ?But now you are changing other things in your pi images, not just the sbitx program, right? ?It’s good that is all open-source too; but on a Debian-based system, you might as well follow Debian practices IMO. I guess you already gave up on having users upgrade everything from source, right? ?(Since it isn’t Gentoo or some other distro that normalizes it)
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Re: Renewed attempt to hack together a workable PA
Hi William,
Yes, I did. Learned Eagle and Kicad along the way. Fingers crossed, I hope it all works. I did make a OP2674 board, but I think I used incorrect input/output transformers. I will put it down to a learning experience.?
Best 73,
Ravi/M0RVI
You had boards made?? And to think, I sell them for $1. ? ? 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: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? ? ? ?I've also been slowly working on replacing the uBITX PA chain, and have been looking at options. ? ?I had boards made for the subject 20 W amp, and have procured the recommended heat sink. Both are unfortunately large if one wants to stuff them into a uBITX case. ? ?The PCB is 2" x 5.5" (about 5 x 14 cm).? The heatsink is 6.9 cm wide, 15 cm long, and 3.6 cm deep. ? ?Attached photos show it in comparison to the QRP Labs 10W amp (capable of 20 with more drive and DC input, apparently). ? ?Separately, I have purchased a 50 W linear from a Ukrainian ham that has had a 10 and 20 W amp on the streets for some time - they look like they might be the origin of the subject 20 W amp. The 50 W amp has been bulletproof. On Wed, Sep 11, 2024 at 11:20 AM, Robert Dale wrote: What is the 20W PCB size? Can’t seem to find it anywhere…. Also, is there still stock on the semi-kits?
-- I'm here to add more value to the world than I'm using up.
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Re: Renewed attempt to hack together a workable PA
Hi Allison Thank you for that information, I'll experiment on higher voltages, I have a PS that will go upto 30V, yes replacing the electrolytic beforehand seems like a good idea. In the meantime, I've done some simulations on LTSPice for a BFR93 + BFU590 pushpull. I will share that shortly. I will put the bitx on the air once I get past the hurdle. The first part looks promising, working on the next stage later today, in between meetings. Best 73, Ravi On Wed, 11 Sept 2024 at 21:33, ajparent1/kb1gmx via groups.io <kb1gmx@...> wrote:
If you can do 20-24V the QRPL amp (10W at 13.8V) can do more.
to do higher 20V or 24V with about 20dbm drive should easily
hit 20+W based on testing. Note to run at 24V some of the
electrolytic caps need to be replaced with higher voltage parts.
Those are C204 and C210, C210, C212. at that power level
use a bigger heatsink.
At 26db ggain you still need two stages of gain to hit the minimum
drive (about 15dbm) two 2n3904s can do that at limited gain.
Everyone will try to squeeze 20db of gain out of what ever
and at below 20M it might work...maybe.
--
Allison
------------------
Please use the forum, offline and private will go to bit bucket.
-- I'm here to add more value to the world than I'm using up.
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Re: Renewed attempt to hack together a workable PA
I read almost all the information, but because of the many advertisements, useful data can be lost.
--
Gyula HA3HZ
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Re: Upgrade to "sBitx 64 bit v3.1 - BTS"
I forgot to mention the wiki because I got lost in entering the correct routes... ;-)? tnx JJ
--
Gyula HA3HZ
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Re: Upgrade to "sBitx 64 bit v3.1 - BTS"
You can also tryout 64Bit BTS using this method via a USB flash drive..
?
?
?
?
-JJ
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The link contains information on downloading our version and/or image. It contains AM RX and TX.
Here is an example of RX in the AM broadcast band. It also works as TX/RX in the amateur bands.
?
?
?
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Re: Upgrade to "sBitx 64 bit v3.1 - BTS"
Sam, the smartest thing to do is to buy some uSD cards as backups. Since it is small, you can write a number or a letter on it to distinguish it. It leaves the original card in its original state. Copy the new image (sb64p2) to the next one, because it has the necessary applications and you don't have to worry about installing it. Once you have the new image, and you previously had a connection on the old card, you must copy the variables to an intermediate USB stick. Of course, you have to start the old system and select it with the File Manager and copy it or use the sBitx-ToolBox.
What you might need: /home/pi/sbitx/data folder
if there was a qso, depending on the application used, the log file must be found: /home/pi/.local/share/JTDX/wsjtx_log.adi or
/home/pi/.local/share/WSJT-X/wsjtx_log.adi (all files with the same name in another folder!)
/home/pi/.local/share/JS8Call/js8call_log.adi
The folders are hidden, so you have to make them visible in the File Manager, if this is not the case.
I'm attaching a pdf of what you need to set up.?
--
Gyula HA3HZ
?
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Re: Renewed attempt to hack together a workable PA
I suspect the nub of Andy's problem was the list of potential buyers that was run for many months before you understandably decided it was too much effort for too little gain to chase up the people on the list once you had stock available and opened purchase to all comers. I think quite a few on the list thought the list was still active and that you would get to them in time, so didn't respond to your "all comers" invitation, hence didn't actually lodge orders with you. I know I nearly fell into that category.
?
Bill, VK7MX
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Re: Upgrade to "sBitx 64 bit v3.1 - BTS"
Can you not just write the image to a different card. Copy over your settings over to ensure the calibrations remain etc..??
I don't have mine yet but being rpi based I'm sure you can keep the original safe and just use a different sd card
Forgive me if I'm not correct?
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Upgrade to "sBitx 64 bit v3.1 - BTS"
Any way to upgrade to "sBitx 64 bit v3.1 - BTS" without wiping out my Raspberry Pi configuration?
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I cannot find any reference to "AM" at that link.....help please.
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I removed the tiny diode and installed a 10A10 across the two lugs on the power connector. I run a 10amp fuse and it blows it immediately. I tested the diode before installing one in the radio. I have not tried it with the radio but it should work.?
David
Looking for responses and opinions on what people are using for reverse polarity protection on the sBitx?
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-JJ
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I sell a 20A and a 50A reverse protection kit… ? ? 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: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ?
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From: [email protected] <[email protected]> On Behalf Of JJ - W9JES
Sent: Thursday, September 12, 2024 10:52 AM
To: [email protected]
Subject: [BITX20] Reverse polarity protection on the sBitx? #sbitx #sbitx_v3? Looking for responses and opinions on what people are using for reverse polarity protection on the sBitx?
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Reverse polarity power is definitely an issue for those who might not use connectors that can be only plugged in one way. If the radio would function at full power on slightly less voltage, a full wave bridge rectifier would solve the problem completely.? The drawback to that approach would be extra voltage drop and current consumption. I premake all connectors to match the radio socket, which is a reasonably good choice, in my opinion. Then, being paranoid,? I verify with a multimeter before connecting. For portable, I connect to a large car jump box battery. For home use, I have a connector going to my 12 volt supply.
Accidents happen, voltmeters help minimize their occurrence. Don't get in a hurry.
Scotty WD4PYT
Looking for responses and opinions on what people are using for reverse polarity protection on the sBitx?
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-JJ
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Re: Renewed attempt to hack together a workable PA
Interesting… I’ve had the boards in stock continuously for the last 1.5 years… and the kits in stock except when I ran out of parts… that rarely lasted for more than two weeks. ? I guess that’s a learning for me.? Advertise more.? But then… I sell the things at cost. ? ? 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: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ?
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From: [email protected] <[email protected]> On Behalf Of AndyH
Sent: Thursday, September 12, 2024 8:58 AM
To: [email protected]
Subject: Re: [BITX20] Renewed attempt to hack together a workable PA? I got on a list for a semi kit, and waited, and waited, but fell thru the cracks in the system. I already had most of the parts - it was easier to just get it done. On Thu, Sep 12, 2024 at 07:55 AM, K9HZ wrote: You had boards made?? And to think, I sell them for $1. ? ? 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: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? ? ? ?I've also been slowly working on replacing the uBITX PA chain, and have been looking at options. ? ?I had boards made for the subject 20 W amp, and have procured the recommended heat sink. Both are unfortunately large if one wants to stuff them into a uBITX case. ? ?The PCB is 2" x 5.5" (about 5 x 14 cm).? The heatsink is 6.9 cm wide, 15 cm long, and 3.6 cm deep. ? ?Attached photos show it in comparison to the QRP Labs 10W amp (capable of 20 with more drive and DC input, apparently). ? ?Separately, I have purchased a 50 W linear from a Ukrainian ham that has had a 10 and 20 W amp on the streets for some time - they look like they might be the origin of the subject 20 W amp. The 50 W amp has been bulletproof. On Wed, Sep 11, 2024 at 11:20 AM, Robert Dale wrote: What is the 20W PCB size? Can’t seem to find it anywhere…. Also, is there still stock on the semi-kits?
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Looking for responses and opinions on what people are using for reverse polarity protection on the sBitx?
?
?
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?
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-JJ
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HA3HZ
Sam Hanie
WK4DS
K9HZ
Scotty R