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Adding I2C Encoders
#sBitx
I plan to tap into the SDA/SCL connection on the digital board in order to wire up 2 x Duppa i2c encoders, I assume this shouldn't cause any issues for the codec or the 5351 ? I also noted you seem to be using bit bang for the i2c comms. |
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Re: #sbitx audio control on tap
#sBitx
As soon as I pressed Reply to Group, I realized that I should have stated I like the screen saver and didn¡¯t want to turn it off. ?Sorry.
The encoder, eh? ?I am not sure what you mean. ?Can you describe? |
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Re: No RF power CW, digital but OK SSB
#sBitx
Hmm.. there is no? modulation at all. The bias seems to be right. Have you reset the bias from it's shipped settings? On Sun, Aug 7, 2022, 5:40 PM Bob Benedict, KD8CGH <rkayakr@...> wrote: Thanks for the reply. |
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Re: No RF power CW, digital but OK SSB
#sBitx
Thanks for the reply.
WATTS is set at 10 (10 watt dummy load limit). Receive draw is 1.2 A.? PTT with no voice is 1.6 A, current draw goes up and RF power detected when speaking into mic. CW and digital draw 1.6 when tone is heard and seen in spectrum, no RF detected. -- ? 73 ??? Bob? KD8CGH |
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Re: #sbitx audio control on tap
#sBitx
You could turn off the screen saver if you wish. The ULN2003 doesnt have any spare lines. There are two spare lines on the encoder, though. They can use used. - f On Sun, Aug 7, 2022, 5:35 PM Scott KE8KYP <scott_massey@...> wrote: Nice job on the Tap addition.? After I understood how to deal with the user_settings deal (novice Linux programming skills), it was nice to get that feature working. ? |
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Re: #sbitx audio control on tap
#sBitx
Nice job on the Tap addition. ?After I understood how to deal with the user_settings deal (novice Linux programming skills), it was nice to get that feature working. ?
One of my intended operational modes is JS8Call which I am sure is on the development list. ?In the meantime, running wjstx in WSPR mode is pretty cool. ?Unfortunately, after a timeout, the screen(s) goes into screen saver mode and other than the constant hum of the speaker, there is no visual way to verify if the radio is ON or in a TX mode without a key stroke. ?I know the sbitx has a very clean appearance but if you were to add a PWR and TX LED to the case, how would you electrically do it? ?The PWR LED is pretty simple but I am uncertain how to drive a TX LED. ?Use one of the unused ports of the ULN2003A (U4)? ?My guess is the driver would help isolate and keep the loading down on whatever TX source but I¡¯m just not sure where best to derive it. Sorry to hijack this thread. ?If I should create a separate message on this subject, please let me know. Cheers, Scott? |
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Re: No RF power CW, digital but OK SSB
#sBitx
?Check the WATT setting. How much is the currenr draw on rx and how much on the tx? On Sun, Aug 7, 2022, 3:57 PM Bob Benedict, KD8CGH <rkayakr@...> wrote: I adjusted the drives as described in the doc. With the sBitx connected to a dummy load/SWR/power meter I see RF power output in SSB modes when I press PTT and speak. In CW, FT8 and PSK I can hear a tone generated and see the modulation in the spectrum, but there is no RF power out and the current draw does not increase over the quiet SSB level. |
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No RF power CW, digital but OK SSB
#sBitx
I adjusted the drives as described in the doc. With the sBitx connected to a dummy load/SWR/power meter I see RF power output in SSB modes when I press PTT and speak. In CW, FT8 and PSK I can hear a tone generated and see the modulation in the spectrum, but there is no RF power out and the current draw does not increase over the quiet SSB level.
-- ? 73 ??? Bob? KD8CGH |
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Re: DAYLIGHT RADIO
Daniel KK4MRN
Hello Allan and Ashhar, Yeah, I look forward to seeing others building the Daylight Again radio.?? I am still on the fence, but waiting to see others' experiences building the radio. I want to home brew a HF SSB voice transceiver.? And when Ashhar posted his email about the radio, I thought this would be a good rig to build.? Or maybe home brew a BITX.?? I was also tempted to buy the BITX kit just to get the parts - and build it using Manhattan Construction.? I built a Crystal Tester using Manhattan Construction recently - and I really like this way of building stuff.? No flipping the board back and forth...? ? I also like the suggestion of building the various stages of the Daylight Again Radio on separate boards this way you can individually test each board.? I really liked how Chuck Adams (used to be K7QO) built his radios where he only built and tested one stage at a time. 73 Daniel KK4MRN
On Sunday, August 7, 2022 at 03:05:12 AM EDT, Alan Cooper <cqw7aln@...> wrote:
Ashhar, I have? succesfully obtained all of the mosfets and transistors. I am now working at gathering up all of the supporting parts for those. instead of trying to get the whole radio? built on one main board, I have divided up the schematic into assembly sections on individual boards which I have a large number of already. My hope is to make troubleshooting easier and modifications simpler to do. would it be possible to change out the trifillar transformers in the driver and PA stages for something easier to contruct ? Thanks Alan w7aln On Sat, Aug 6, 2022, 12:49 PM Ashhar Farhan <farhanbox@...> wrote:
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Re: sBitx antenna-first warning
You will also need a way to switch this in and out and a massive heatsink to dissipate 50 watts of power. A better solution would be to have a power sniffer that will reduce the power when it exceeds the upper limit and increase it back as the swr improves. This will need software in the sbitx. - f On Sun, Aug 7, 2022, 12:23 PM Pierre FK8IH <jb.gallauziaux@...> wrote:
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Re: DAYLIGHT RADIO
Ashhar, I have? succesfully obtained all of the mosfets and transistors. I am now working at gathering up all of the supporting parts for those. instead of trying to get the whole radio? built on one main board, I have divided up the schematic into assembly sections on individual boards which I have a large number of already. My hope is to make troubleshooting easier and modifications simpler to do. would it be possible to change out the trifillar transformers in the driver and PA stages for something easier to contruct ? Thanks Alan w7aln On Sat, Aug 6, 2022, 12:49 PM Ashhar Farhan <farhanbox@...> wrote:
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Re: sBitx antenna-first warning
Pierre FK8IH
To build the resistive bridge three resistors of this kind might be better than 3x(10x470Ohm in parallel) :? Considering the small size of these Kyocera resistors the addition of a resistive bridge as described by Ashhar inside the sBitx enclosure would be a nice measure to definitively protect the finals. 73 - Pierre - FK8IH |
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Re: Does anyone have the KD8CEC 5 inch nextion files?
Hi Jon
I do not have a 5" Nextion, so the following are suggestions. - You do need a separate voltage regulator for a 5" Nextion based on the power budgets for the Raduino components.? I suggest you follow the LM7805 datasheet and add the input (.2uf) and output (.1 uf) capacitors. - In other applications I have found that the following LC filter does work to knock down switching (PWM) types of noise on the power line. Again, suggestions to try as I do not have a 5" Nextion display.? The largest that I have is 3.5". 73 Evan AC9TU |
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Re: Haako 20% off, Tuesday, August 9
On Sat, Aug 6, 2022 at 10:16 PM, Don--AE4DW wrote:
Velleman VTDESOL3UDon thanks for posting about the Hakko sale.? I was looking at new station today, glad I waited.? That Velleman looks a lot like this that I have had for a few years.? I am very happy with it. ? -- |
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Re: Haako 20% off, Tuesday, August 9
On Sat, Aug 6, 2022 at 07:33 PM, Stephen KO4CVU wrote:
You might consider a?Velleman VTDESOL3U Vacuum Desoldering Pump with Heater 30W. Amazon Prime has one for less than $16. The inner diameter of the tip is specified to be 1.8 mm. The outer diameter of the tip looks to be about 3 mm. In essence, it is what I used to call a solder sucker, but it has a heated tip.?I actually just got one of those..total impulse buy based on a post i saw. Have yet to use it. |
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Re: Lost the receiver!
#sBitx
Directly mail me the user_settings.ini file - f On Sun, Aug 7, 2022, 6:14 AM W6LKB <lbon@...> wrote: Yes I heard it and there was a yellow band! |
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Re: #sbitx audio control on tap
#sBitx
Ashhar sounds good, but on program start, you are creating a default file if one does not exist.? So git rm the file and it should be fine. 73 Lou KI5FTY On Sat, Aug 6, 2022 at 7:02 PM Ashhar Farhan <farhanbox@...> wrote:
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Re: Haako 20% off, Tuesday, August 9
Check out circuit specialist
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Bob Benedict, KD8CGH
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