Hello Vincenzo,
Are you sure you read and saw what Farhan shared at the FDIM.
His software might be the same, surely his circuit is not the same.?
I would recommend studying it from whatever was shared and see the difference.
Farhan built his prototype in Manhattan style , and if you think than can be relied?upon for a crowdfunding idea, that's a big risk.?
IMHO, it's not all that easy, as it meets the eye.
Farhan, even hasn't shared a schematic diagram of zBITX anywhere.
So what are you relying?on?
Charudatt VU2UPX?
On Thu, 26 Sept, 2024, 5:11 pm IU0KVG via , <praturlon.vincenzo= [email protected]> wrote: Well of course Farhan did it.
He also said that the zBitx uses the same circuits and sw than the sBitx, so the development stage would be minimal, mainly optimizing the phisical geometry and testing.
With the new 2W I think there should be very little surprises.
The risk exits naturally, but then again crowdfunding is often employed when the risk of production is borderline for a business, but it is acceptable by a motivated community.? ?
Vincenzo
?
Il giorno gio 26 set 2024 alle ore 13:32 Charudatt Uplap via <charudattu= [email protected]> ha scritto: Has anyone tested the concept (zBITX) yet?
Taking a risk with crowdfunding without having tested it is taking a big risk.?
And should anyone of us has tested the concept or idea of zBITX (with Pi-02W+OLED display) should publish/share it here.
Anything other than this is sBITX itself.
Charudatt - VU2UPX?
On Thu, 26 Sept, 2024, 4:56 pm IU0KVG via , <praturlon.vincenzo= [email protected]> wrote: Hi Evan, it was just a "what if" scenario, of course.
However I think that, even with the small display, an assembled and tested zBitx radio will hardly cost less than 300USD in such a small quantity.
Thank you for voting! Ciao, Vincenzo??
Il giorno gio 26 set 2024 alle ore 10:58 Evan Hand via <elhandjr= [email protected]> ha scritto: I voted no, as the cost seems to be too high.? You can purchase a complete sBitx board for $180 or a complete assembled radio for $399, so $200/$300 for the zBitx is too much.
?
?
73
Evan
AC9TU
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Has anyone tested the concept (zBITX) yet?
Taking a risk with crowdfunding without having tested it is taking a big risk.?
And should anyone of us has tested the concept or idea of zBITX (with Pi-02W+OLED display) should publish/share it here.
Anything other than this is sBITX itself.
Charudatt - VU2UPX?
On Thu, 26 Sept, 2024, 4:56 pm IU0KVG via , <praturlon.vincenzo= [email protected]> wrote: Hi Evan, it was just a "what if" scenario, of course.
However I think that, even with the small display, an assembled and tested zBitx radio will hardly cost less than 300USD in such a small quantity.
Thank you for voting! Ciao, Vincenzo??
Il giorno gio 26 set 2024 alle ore 10:58 Evan Hand via <elhandjr= [email protected]> ha scritto: I voted no, as the cost seems to be too high.? You can purchase a complete sBitx board for $180 or a complete assembled radio for $399, so $200/$300 for the zBitx is too much.
?
?
73
Evan
AC9TU
|
Hi Evan, it was just a "what if" scenario, of course.
However I think that, even with the small display, an assembled and tested zBitx radio will hardly cost less than 300USD in such a small quantity.
Thank you for voting! Ciao, Vincenzo??
Il giorno gio 26 set 2024 alle ore 10:58 Evan Hand via <elhandjr= [email protected]> ha scritto: I voted no, as the cost seems to be too high.? You can purchase a complete sBitx board for $180 or a complete assembled radio for $399, so $200/$300 for the zBitx is too much.
?
?
73
Evan
AC9TU
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This issue still exists. To avoid complications do not change the Raspberry PI Configuration (Localisation) from US to your Country. You will end up without power output in any mode. I had this issue last night. I dit initially my setup to DE German and had no TX output. After I saw Lorenzo's helpful post, i switched the settings back to US English and there it was all fine. Output is correct.
Many Thanks to Lorenzo.
@ HF- Signals, maybe before this issue is solved, give to all new buyers a small note in there delivery.
--
vy73
(DO1LU)
Bernd
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I voted no, as the cost seems to be too high.? You can purchase a complete sBitx board for $180 or a complete assembled radio for $399, so $200/$300 for the zBitx is too much.
?
?
73
Evan
AC9TU
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On Thu, Sep 19, 2024 at 04:03 PM, IU0KVG wrote:
?
11 people replied, in a few days, that they would partecipate in the crowdfunding.
Given the very limited scope of the pool, and no "official" backing, I think it would be possible to achieve the goal, should Ashhar decide to follow this path.
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Maybe this could be the solution:
--
Gyula HA3HZ
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I am new to this forum. I do a lot of reading of other forums especially on the SDR Radios and in particular to CW operation. The one common thing I am finding is as the speed exceeds about 15WPM the built in Keyers are not able to keep up. who would have thought that an old mode such as CW requires more computer time transom of the more advanced digital means of communications.
This explains why the CW Decoders have some difficulty as the noise increase and the speed increases above about 15WPM. Again proving the human ear connected to a brain wired (years of training) for CW is still faster and better at copying CW, than a current day processor.
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Re: High pitch whine on 20-10 meters
#sBitx
Joel,
?
any way to remove rtc module and run shielded cable from it to the sbitx? Im just guessing since i dont own one yet. tons of ubitxes but no sbitx. seems like you could shield it with a copper board box and use mini coax on the outputs inside the sbitx
?
good luck on the repair.
?
73
David
ac9xh
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Re: High pitch whine on 20-10 meters
#sBitx
Hi David,
?
Yes I have tried filtering the high pitch whine out with caps on the 5 volt supply, they have had no effect at all. I believe the noise is from the I2C buss, because with the RTC unplugged in I can still hear the same noise only very lightly, (still a vast improvement). As far as I know there is no way to filter the I2C buss without affecting it's performance. If anyone has any ideas on how this can be cleaned up, I would love to hear it, meanwhile I will run without the RTC.
?
Joel
N6ALT
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Re: A long long video on building feedback amplifiers
Thanks, Farhan. I was hoping an assembly manual might give info on shielding requirements and so on, plus more explanation of how it works. I was somewhat perplexed as to how square wave excitation could work without use of DSP, as in the nanoVNA for example. But I think I get it now as far as the superhet design with sharp filtering to reject the harmonic components.? It's very clever!
On the ugly FBA - I got inspired enough to give it a shot and managed to create a functional amplifier in an hour or so. I have those somewhat stringy equations from EMRFD in my "everything" excel ham workbook to assist in designing these things.
73
Nick, WA5BDU
On Tue, Sep 24, 2024 at 10:26?PM Ashhar Farhan via <farhanbox= [email protected]> wrote: Nick, See this ?
That was a very informative video. I'm primed to try some ugly construction for the first time (more or less) since I build the Ugly Weekender back around 1999.
?
I wonder if anyone happens to have the manual for the Antduino, assuming there was one. If so, I'd love to have a copy of it.
?
73
?
Nick, WA5BDU
?
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sBitx calibration, and flattening power out
I wanted to check the actual power output on my old (serial #118) sBitx. I built a simple RF detector using a 1N4007 diode and a 10nF capacitor, with the rig running into a 50 ohm dummy load. I found a very helpful note from Hans Summer that described this measurement.
After all the caveats in his note, I decided my setup might "still be used nicely for ballpark and for relative measurements of RF power level." Making some meaurements and preliminary calculations, I decided to try to set "scale" values in hardware_settings.ini that gave me 5 watts out on every band, with the sBitx drive control set at 50. I used CW mode for my tests. 5 watts was an attractive taget because I can claim to be running QRP on all bands, and it might be a good level for driving a higher power amplifier.
I made a table to collect data, and started to experiment with scale values in hardware_settings.ini. I worked out several formulas to predict new values based on measurements, but they were not really helpful. It did lead me to collecting power measurement over a range of scale values though, and then I just eyeballed the data and got to the final numbers.
This table shows I can now set the drive to 50, and get just over 5 watts out on 80 through 10 meters.
(see drive_50.jpg)
With the same hardware_settings.ini scale values, I can turn the drive up to 90 and get the following power out.
(see drive_90.jpg)
With drive level = 90, power output is no longer flat across all bands. But I am satisfied that I am still under the rated power output for my sBitx on all bands.
This graph shows the scale value in hardware_settings.ini, and the power output at the two different drive levels across the bands.
(see sbitx power cal.jpg)
--
Mike KB2ML
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I would like to sell my sBitx V2 (running V3.1).? The radio is about a year old and in excellent condition, used sparingly.? I really don’t have time to experiment with the device and would like to find a good home for it.? I will ship US local.? Price is $250.? I can be contacted via e-mail. ? Tom WW8LA
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Re: High pitch whine on 20-10 meters
#sBitx
Have you tried filtering it out? maybe using ferrite beads on output of rtc module and input to other modules?Maybe scope it out to see what the noise is and maybe use some caps and maybe an inductor to filter it to ground?
David ac9xh
On Wednesday, September 25, 2024 at 10:28:24 AM CDT, Joel Caulkins/N6ALT <caulktel@...> wrote:
Hi all,
?
Today I decided I've listened to this high pitch whine on the 20 meter through 10 meter band long enough. Through a process of elimination I determined that the RTC module is causing the offensive noise in the background. With it unplugged everything is nice and quiet. My questions are, do I even need a RTC if I don't do digital stuff, does anyone know of a fix for this to quiet it down? BTW, I tried the exact same module out of my V2 board and it sounds the same with it plugged in, so It's not a defective module. Is anyone having this high pitched whine? Maybe some bypassing of the module is in order?
?
Joel
N6ALT
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High pitch whine on 20-10 meters
#sBitx
Hi all,
?
Today I decided I've listened to this high pitch whine on the 20 meter through 10 meter band long enough. Through a process of elimination I determined that the RTC module is causing the offensive noise in the background. With it unplugged everything is nice and quiet. My questions are, do I even need a RTC if I don't do digital stuff, does anyone know of a fix for this to quiet it down? BTW, I tried the exact same module out of my V2 board and it sounds the same with it plugged in, so It's not a defective module. Is anyone having this high pitched whine? Maybe some bypassing of the module is in order?
?
Joel
N6ALT
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Re: A long long video on building feedback amplifiers
Ashar when you discontinue a device you might want to put the gerbers in the github where those who want to get one and build it can get the boards made.
On Tue, Sep 24, 2024 at 11:26?PM Ashhar Farhan via <farhanbox= [email protected]> wrote: Nick, See this ?
That was a very informative video. I'm primed to try some ugly construction for the first time (more or less) since I build the Ugly Weekender back around 1999.
?
I wonder if anyone happens to have the manual for the Antduino, assuming there was one. If so, I'd love to have a copy of it.
?
73
?
Nick, WA5BDU
?
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Re: A long long video on building feedback amplifiers
toggle quoted message
Show quoted text
That was a very informative video. I'm primed to try some ugly construction for the first time (more or less) since I build the Ugly Weekender back around 1999.
?
I wonder if anyone happens to have the manual for the Antduino, assuming there was one. If so, I'd love to have a copy of it.
?
73
?
Nick, WA5BDU
?
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Re: replacing V2 board with V3 ???? DOES NOT DROP IN
same size sink fin area??? with 1/2 flanges on both sides///
?but offset about 1/2 inch ..
perhaps? i just swap heatsinks ???
that was stupid on my part to not have thought of that before the nibbler started work!
toggle quoted message
Show quoted text
On 9/24/2024 4:19 PM, Joel Caulkins/N6ALT wrote: Bill,
I'm not sure whats going on. I noticed you have SN 0045, mine was a V2 radio also, SN 0042 so built at the same time yours was and my new V3 board just dropped in very easy. Maybe the heat ink is slightly bigger, IDK. Maybe someone from HFSignals can give some help here. A picture might help also.
Joel
N6ALT
--
link to my QRZ listing
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Re: replacing V2 board with V3 ???? DOES NOT DROP IN
same size sink fin area??? with 1/2 flanges on both sides///
?but offset about 1/2 inch ..
perhaps? i just swap heatsinks ???
toggle quoted message
Show quoted text
On 9/24/2024 4:19 PM, Joel Caulkins/N6ALT wrote: Bill,
I'm not sure whats going on. I noticed you have SN 0045, mine was a V2 radio also, SN 0042 so built at the same time yours was and my new V3 board just dropped in very easy. Maybe the heat ink is slightly bigger, IDK. Maybe someone from HFSignals can give some help here. A picture might help also.
Joel
N6ALT
--
link to my QRZ listing
|
Re: replacing V2 board with V3 ???? DOES NOT DROP IN
Bill,
?
I'm not sure whats going on. I noticed you have SN 0045, mine was a V2 radio also, SN 0042 so built at the same time yours was and my new V3 board just dropped in very easy. Maybe the heat ink is slightly bigger, IDK. Maybe someone from HFSignals can give some help here. A picture might help also.
?
Joel
N6ALT
|
HA3HZ
VE6LX
Joel Caulkins/N6ALT
Nick Kennedy
