Good morning.
If possible, yes please send me the gerber files for your pi Hat motherboard.
All the best, 73 de VA2GJ ³Ò¨¦°ù²¹±ô»å
On Sun, Jul 7, 2024 at 1:00?PM Charudatt Uplap via <charudattu= [email protected]> wrote: I designed a Pi HAT MB for the Pi HAT distributed by Farhan during the FDIM 2024 presentation. ? I share the details here. Size is 10x10 cm ? If anyone interested, I can also share the Gerb files. ? Regards Charudatt ¨C VU2UPX
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Re: [sBitx v3] External PTT for controlling an amplifier
If you are using the original sBitx spacer, then an M2.4 screw is the correct size.
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Gyula HA3HZ
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Re: [sBitx v3] External PTT for controlling an amplifier
On Wed, Jul 3, 2024 at 05:30 PM, Michael DK1MI/N1BSD wrote:
Thanks!
Yes, that's a Noctua 40x10mm fan. It comes with some additional cables including the counterpart of the cable that is fixed to the fan which has two wires. I've soldered the +12V wire to the plug that is connected with the power switch and the GND wire to the GND pad of the XT60 connector. There is also a 5V version available that could be directly connected to the pi.
The 3D design can be found here and is from one of the users in this group:
What thickness are the screws that fasten the raspberry pi to the sbitx board?
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I sort of remember that the change from USB to LSB or back doesn't take effect until the frequency is changed when using the stock firmware.
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Re: Wifi Manager - 64bit OS
And JJ's 64Bit version of the sBitx OS comes with Debian 11 "Bookworm" and that already has a WiFi "HotSpot" feature built in.??
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Pete VK3PYE
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Re: Wifi Manager - 64bit OS
Set up Wi-Fi without a wired LAN in RPi Config, it asks for a country setting.
(Raspberry icon-> Preferences-> Raspberry Pi Configuration-> Localization-> WiFi Country)
Then click on the red xx instead of LAN with the right mouse button and select WiFi. It will then ask for the password.
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Gyula HA3HZ
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Can we add a Wi-Fi manager to the Toolbox so that we can add a network easily ?
Jason (ACK) has a good utility for this in his build.
I booted my RPi with the 64bit OS with a LAN cable to the router, but didn't show up on the network. At least enable SSH so that things are easy to connect to.
Charudatt - VU2UPX?
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Re: Resurrection of a developers edition issue - relay noise
Back in msg #103870 Gordon Gibby talked about relay noise in the DE. I think as part of the effort to reduce the risk to the finals, a workaround was implemented to switch the LPFs every time the key is pressed (to have them absorb some transient energy). On the DE, the LPFs are switched with relays, but it should only happen when changing bands. Hearing them switch with every dit and dah just seems wrong, when the radio is so close to having electronic breakin.
Gordon identified the fix in his message. Even in JJ's latest 64 bit build I can still open sbitx.c and make the changes at line #1400 and #1402, and restore electronic breakin. My question is: Given all the later mods made since the sbitx DE original PA design, is that old workaround of switching the LPFs still necessary?
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Mike KB2ML
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I set it to 11.554. Didn't notice any difference in the ubitx. I'll dig out the scope. I'm sure there's a reference for the Raduino?out there somewhere.
That value is too high.? It should be below 11.057 at most.?
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Re: S/N 0994 receiver internal noise
I¡¯ve got the 5 volt issue reasonably working. The Drok module combined in series with a LP filter has significantly stabilized the critical 5v line. Had to play with grounding but ended up grounding at the header and then on the chassis ground.
2.5-3 amps is just what¡¯s needed.
Ive done some experiments with shielding the Pi4 and the ribbon cables.
Using copper foil tape or similar.
I used a bare HAT board wrapped in copper tape.
This is installed on the exposed bottom on the installed Pi4. Then carefully cut long strips of copper tape and cover the long internal ribbon cable. Use clear packing tape over the copper to insulate.
Still working on the main display RFI shield.
With the already suggested 5v DC-DC modifications and the promising results from my amateur copper tape shielding the internal RFI is being attenuated. So headed in the right direction.
?
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That value is too high. ?It should be below 11.057 at most.?
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I had it set at 11.0581. I didn't see a 'fine' adjustment, but I can look at it tomorrow. I do have a 50mhz scope.
Don,
This looks like the "course" BFO setting used to zero beat the AM signal.? Note that there is little to no signal above 1.8 KHz.? What values are you entering when you press the tuning knob?? If you look closely at the video, you will note that Farhan has set it to 11.056 for the course adjustment, and then for the final adjustment, it is 11.0554.? your values should be close to these.
There have been reports of the Raduino Si5351 failure causing similar issues.? To test it, you need a scope or frequency counter to verify the three clock signals.
73
Evan
AC9TU
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Re: S/N 0994 receiver internal noise
I did some static testing of the DROK regulator module and it was interesting. I wrote about it on my blog here¡?
Suffice it to say though that the DROK is better. About 1/2 the noise from what I could tell. Maybe more but it was hard to tell due to the randomness of the noise. I also have 4 spares if anyone is looking for one for their radio that I could see reasonable.?
David - WK4DS?
On Tue, Jul 9, 2024 at 02:06 PM, Kb4yho wrote:
Dont need ¡°what worked for me¡± comments.
Whats the solution?
Could you post a picture of your waterfall with the noise?? Maybe with the band spread set to 25K with a dummy load or no antenna attached?
I mean if you have your IF GAIN cranked to 100% on 40M or 80M you might have a lot of noise.? But, that would be true of a lot of radios.
I did replace my 5V regulator and that did help reduce some of the background noise.? But, my V3 is pretty quiet and has a great sounding receiver.
I'm sure the Raspberry PI sitting next to the receiver front end does produce some noise.? But most SDR's have a computer of some sort inside.
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Don,
This looks like the "course" BFO setting used to zero beat the AM signal.? Note that there is little to no signal above 1.8 KHz.? What values are you entering when you press the tuning knob?? If you look closely at the video, you will note that Farhan has set it to 11.056 for the course adjustment, and then for the final adjustment, it is 11.0554.? your values should be close to these.
There have been reports of the Raduino Si5351 failure causing similar issues.? To test it, you need a scope or frequency counter to verify the three clock signals.
73
Evan
AC9TU
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Well, I got the frequency dialed in. I can't get the BFO set though. I'm using Friture with a USB mic (on my webcam) laid right on top of the ubitx speaker, and I can't get anything close to the display in Farhan's video. This is about the best I can get. No impact on USB or LSB, both sound the same.
Thanks Evan.
I lack a signal generator, so I'll?have to stick to WWV. HF is pretty quiet here in Seattle at the?moment. I'll give it a go in a few hours.
Don,
The signal that Asher Farhan is using is a short wave station in India.? Any AM signal can be used.? I use a 10MHz reference source.? You can also use a frequency generator.? WWV can work.? It has the tones that can make finding the zero beat hard.? Note that a higher frequency is better than a low frequency. ?
73
Evan
AC9TU
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Re: Homebrew sBitx on 64 bit and problem with Subthreshold Conduction
#homebrew
#sBitx
Congratulations Dean.
Now waiting for you to share your build details with us.
Charudatt - VU2UPX?
On Thu, 11 Jul, 2024, 2:23 am Dean Souleles via , <dsouleles= [email protected]> wrote: Thanks to JJ my homebrew sBitx is now up and running on the 64 bit release and all is well.? I'm going to be testing over the next few days but I will likely keep it.? The 64 bit OS feels like the future and JJ and team have done a nice job with fixing some niggling problems and adding capabilities.
While testing the 64 bit release I began having an intermittent issue where the Tx relay would randomly switch - sometimes just once and sometimes it chatter like a machine gun.? Pete, N6QW helped me figure it out - it was a leaky transistor.
Details and a video showing the 64 bit build in action on my blog'
73,
Dean
KK4DAS
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Thanks Evan.
I lack a signal generator, so I'll?have to stick to WWV. HF is pretty quiet here in Seattle at the?moment. I'll give it a go in a few hours.
Don,
The signal that Asher Farhan is using is a short wave station in India.? Any AM signal can be used.? I use a 10MHz reference source.? You can also use a frequency generator.? WWV can work.? It has the tones that can make finding the zero beat hard.? Note that a higher frequency is better than a low frequency. ?
73
Evan
AC9TU
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Re: 2m/1 1/4m/70cm mini transverter boards from w1ghz
I think it would great to have VHF/UHF/SHF sBitx.? Maybe a poor man's version of the ICOM IC-9700?? A gBitx?
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Homebrew sBitx on 64 bit and problem with Subthreshold Conduction
#homebrew
#sBitx
Thanks to JJ my homebrew sBitx is now up and running on the 64 bit release and all is well.? I'm going to be testing over the next few days but I will likely keep it.? The 64 bit OS feels like the future and JJ and team have done a nice job with fixing some niggling problems and adding capabilities.
While testing the 64 bit release I began having an intermittent issue where the Tx relay would randomly switch - sometimes just once and sometimes it chatter like a machine gun.? Pete, N6QW helped me figure it out - it was a leaky transistor.
Details and a video showing the 64 bit build in action on my blog'
73,
Dean
KK4DAS
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Re: S/N 0994 receiver internal noise
On Tue, Jul 9, 2024 at 02:06 PM, Kb4yho wrote:
Dont need ¡°what worked for me¡± comments.
Whats the solution?
Could you post a picture of your waterfall with the noise?? Maybe with the band spread set to 25K with a dummy load or no antenna attached? I mean if you have your IF GAIN cranked to 100% on 40M or 80M you might have a lot of noise.? But, that would be true of a lot of radios. I did replace my 5V regulator and that did help reduce some of the background noise.? But, my V3 is pretty quiet and has a great sounding receiver. I'm sure the Raspberry PI sitting next to the receiver front end does produce some noise.? But most SDR's have a computer of some sort inside.
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HA3HZ
Peter VK3PYE
Kb4yho
WK4DS
AE9J