I find that Elecraft's tap method for controls is easy and useful.
--
? 73
??? Bob? KD8CGH
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Re: Turn off WiFi on your sBitx
Hi
I may have solved the WiFi noise.
After having seen several schematics for LM380 I discovered that all of them have a 100nF cap in series with a 2.7ohm? from pin 8 to ground. This was not on the sBitx schematics.
Dismantling the sBitx again and study the pcb. No cap and resistor.
I didn't have 2.7ohm but 4.7ohm parallel with 10ohm gives 3.2ohm. I gave it a try.
And result was no strange noise with WiFi connected and no noise when disconnected from my net.
73 de oz9ny, niels
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Re: Turn off WiFi on your sBitx
Farhan, try adding a square inch of copper PCB tight against the top of the LM380, earthed. The RF could be getting direct into the silicon die.
Ian McCrum, MI5AFL
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Re: Turn off WiFi on your sBitx
The LM380 takes the earphone out from the codec. If you plug in earphones, the LM380 is cut off. There is no buzz in the earphones, but the buzz in the LM380 continues eve though it is not connected to the ear out of the codec. The LM380 is possibly picking it up from the wifi radio that is directly under it, on the raspberry pi. - f
Interesting. ? Perhaps it is being demodulates before that? ? Where in the line does it first manifest?
Gordon ? I have to report failure with the current attempt at eliminating the burp from the LM380. I tried putting a 2.2ohms in series with 0.1uf across the speaker as a snubber. I added a bypass on pin 1. I put a 0.1uf across the input I loaded down the input to 220 ohms. None produced any difference. It is incredible that 2.4 GHz signal of about 1 mw is getting inside an audio IC. Maybe the microwave homebrewers should use LM380 instead of expensive GaAs FETs. I will still chipping away at this interesting problem. - f We are early adopters because of the confidence we have in you!? Looking forward to getting mine on Monday!
On Tue, Aug 2, 2022 at 10:09 PM Ashhar Farhan < farhanbox@...> wrote: It is tough and frustrating to be an "early adopter". I thank you all for taking the plunge, Respect!
The joys of mass production and finding little bitty problems. ? ?We have the same thing in drug product production and vaccine production of course.... only when you make a lot of some thing do you start to find a little bitty unexpected issues.?
We have the incredible advantage of having Ashhar right on top of everything!! ? My first Heathkit had horrible key clicks and I think I spent a year shipping it back-and-forth Benton Harbor (from earning money vacuuming the house ) before I learned enough to fix it myself. ?
Gordon ? Bob, Thats the LM380 having some kind of oscillations. I will have a fix for the quickly. The sound goes away if you turn the wifi off. Right click on the wifi icon and select Wifi off. - f On Wed, Aug 3, 2022, 2:46 AM Bob Losee KO9V < Loseeunc@...> wrote: I¡¯m having the same sounds¡ anywhere from 4 to 8 sounds then a several second pause, then starts again. ? Changing audio level makes no difference. I¡¯ve never tried transmitting¡ just listened to WWV across town from me and it is a clean stable receiver.? Tried logging in to my wifi but I still have two red X characters over the wifi symbol Bob, KO9V, Serial Number 20 On Aug 1, 2022, at 1:57 PM, Niels Jalling <niels@...> wrote:
?When I powered up my new sBitx I heard repeating noise from the loudspeaker. I knew I had seen the problem mentioned somewhere.
Found it on youtube:
Follow the description to turn off the WiFi and the noise goes away.
73 de oz9ny, niels
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Re: The Daylight Again - An All analog radio
Farhan,
Excellent writeup. This should make many brains to ring.
Madhu
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Re: Turn off WiFi on your sBitx
Interesting. ? Perhaps it is being demodulates before that? ? Where in the line does it first manifest?
Gordon
toggle quoted message
Show quoted text
On Aug 4, 2022, at 01:08, Ashhar Farhan <farhanbox@...> wrote:
? I have to report failure with the current attempt at eliminating the burp from the LM380. I tried putting a 2.2ohms in series with 0.1uf across the speaker as a snubber. I added a bypass on pin 1. I put a 0.1uf across the input I loaded down the input to 220 ohms. None produced any difference. It is incredible that 2.4 GHz signal of about 1 mw is getting inside an audio IC. Maybe the microwave homebrewers should use LM380 instead of expensive GaAs FETs. I will still chipping away at this interesting problem. - f We are early adopters because of the confidence we have in you!? Looking forward to getting mine on Monday!
On Tue, Aug 2, 2022 at 10:09 PM Ashhar Farhan < farhanbox@...> wrote: It is tough and frustrating to be an "early adopter". I thank you all for taking the plunge, Respect!
The joys of mass production and finding little bitty problems. ? ?We have the same thing in drug product production and vaccine production of course.... only when you make a lot of some thing do you start to find a little bitty unexpected issues.?
We have the incredible advantage of having Ashhar right on top of everything!! ? My first Heathkit had horrible key clicks and I think I spent a year shipping it back-and-forth Benton Harbor (from earning money vacuuming the house ) before I learned enough to fix it myself. ?
Gordon ? Bob, Thats the LM380 having some kind of oscillations. I will have a fix for the quickly. The sound goes away if you turn the wifi off. Right click on the wifi icon and select Wifi off. - f On Wed, Aug 3, 2022, 2:46 AM Bob Losee KO9V < Loseeunc@...> wrote: I¡¯m having the same sounds¡ anywhere from 4 to 8 sounds then a several second pause, then starts again. ? Changing audio level makes no difference. I¡¯ve never tried transmitting¡ just listened to WWV across town from me and it is a clean stable receiver.? Tried logging in to my wifi but I still have two red X characters over the wifi symbol Bob, KO9V, Serial Number 20 On Aug 1, 2022, at 1:57 PM, Niels Jalling <niels@...> wrote:
?When I powered up my new sBitx I heard repeating noise from the loudspeaker. I knew I had seen the problem mentioned somewhere.
Found it on youtube:
Follow the description to turn off the WiFi and the noise goes away.
73 de oz9ny, niels
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QR code and KD8CEC Memory Manager, "Error- data file is short"
Hi,
I can't use the QRcode function with KD8CEC Memory mangaer. I get? "Error- data file is short".
Should I maybe register at hamskey? I can't however find any function or a link for that.
73 de sm0try
Ulf
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Re: Turn off WiFi on your sBitx
I have to report failure with the current attempt at eliminating the burp from the LM380. I tried putting a 2.2ohms in series with 0.1uf across the speaker as a snubber. I added a bypass on pin 1. I put a 0.1uf across the input I loaded down the input to 220 ohms. None produced any difference. It is incredible that 2.4 GHz signal of about 1 mw is getting inside an audio IC. Maybe the microwave homebrewers should use LM380 instead of expensive GaAs FETs. I will still chipping away at this interesting problem. - f
We are early adopters because of the confidence we have in you!? Looking forward to getting mine on Monday!
On Tue, Aug 2, 2022 at 10:09 PM Ashhar Farhan < farhanbox@...> wrote: It is tough and frustrating to be an "early adopter". I thank you all for taking the plunge, Respect!
The joys of mass production and finding little bitty problems. ? ?We have the same thing in drug product production and vaccine production of course.... only when you make a lot of some thing do you start to find a little bitty unexpected issues.?
We have the incredible advantage of having Ashhar right on top of everything!! ? My first Heathkit had horrible key clicks and I think I spent a year shipping it back-and-forth Benton Harbor (from earning money vacuuming the house ) before I learned enough to fix it myself. ?
Gordon ? Bob, Thats the LM380 having some kind of oscillations. I will have a fix for the quickly. The sound goes away if you turn the wifi off. Right click on the wifi icon and select Wifi off. - f On Wed, Aug 3, 2022, 2:46 AM Bob Losee KO9V < Loseeunc@...> wrote: I¡¯m having the same sounds¡ anywhere from 4 to 8 sounds then a several second pause, then starts again. ? Changing audio level makes no difference. I¡¯ve never tried transmitting¡ just listened to WWV across town from me and it is a clean stable receiver.? Tried logging in to my wifi but I still have two red X characters over the wifi symbol Bob, KO9V, Serial Number 20 On Aug 1, 2022, at 1:57 PM, Niels Jalling <niels@...> wrote:
?When I powered up my new sBitx I heard repeating noise from the loudspeaker. I knew I had seen the problem mentioned somewhere.
Found it on youtube:
Follow the description to turn off the WiFi and the noise goes away.
73 de oz9ny, niels
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Ashhar that sounds like a good solution
On Tue, Aug 2, 2022 at 2:04 PM Ashhar Farhan < farhanbox@...> wrote: I did try that, it was confusing. Should we put it on tap? The function decoder has a pushbutton that is not used.
On Wed, Aug 3, 2022, 12:08 AM Niels Jalling < niels@...> wrote: There is one knob I really miss on the sBitx, An easy accessible volume control.
Idea: Fallback for the function encoder when not not called for it could be volume control. Fallback time f.ex. 15-20 seconds.
73 de oz9ny, niels
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Re: Turn off WiFi on your sBitx
We are early adopters because of the confidence we have in you!? Looking forward to getting mine on Monday!
On Tue, Aug 2, 2022 at 10:09 PM Ashhar Farhan < farhanbox@...> wrote: It is tough and frustrating to be an "early adopter". I thank you all for taking the plunge, Respect!
The joys of mass production and finding little bitty problems. ? ?We have the same thing in drug product production and vaccine production of course.... only when you make a lot of some thing do you start to find a little bitty unexpected issues.?
We have the incredible advantage of having Ashhar right on top of everything!! ? My first Heathkit had horrible key clicks and I think I spent a year shipping it back-and-forth Benton Harbor (from earning money vacuuming the house ) before I learned enough to fix it myself. ?
Gordon ? Bob, Thats the LM380 having some kind of oscillations. I will have a fix for the quickly. The sound goes away if you turn the wifi off. Right click on the wifi icon and select Wifi off. - f On Wed, Aug 3, 2022, 2:46 AM Bob Losee KO9V < Loseeunc@...> wrote: I¡¯m having the same sounds¡ anywhere from 4 to 8 sounds then a several second pause, then starts again. ? Changing audio level makes no difference. I¡¯ve never tried transmitting¡ just listened to WWV across town from me and it is a clean stable receiver.? Tried logging in to my wifi but I still have two red X characters over the wifi symbol Bob, KO9V, Serial Number 20 On Aug 1, 2022, at 1:57 PM, Niels Jalling <niels@...> wrote:
?When I powered up my new sBitx I heard repeating noise from the loudspeaker. I knew I had seen the problem mentioned somewhere.
Found it on youtube:
Follow the description to turn off the WiFi and the noise goes away.
73 de oz9ny, niels
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Re: sBitx antenna-first warning
Thanks Ashhar for this post. I shall now use this?in my QRP station (Hermes Lite 2 with Alexloop magnetic loop antenna, which shows SWR values largely over 40:1 to the tranceiver when tuning the loop (fortunately the LDMOS power amplifier can accept SWR>65:1 but I prefer to be cautious. This tuning-indicator brings the SWR seen by the tranceiver below 2:1 when tuning the antenna, as you say in your post.
I continue to watch the development of your sBitx, wich looks like a wonder and shall decide later to buy one.
73 - Pierre - FK8IH
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Re: The Daylight Again - An All analog radio
Ken, The radio is all point-to-point soldering and large sized components. The performance will suffer it built on a single pcb.? I guess someone can try it. The radio needs improvements, it needs cw to be added, the t/r is primitive and can be bettered too. - f
On Thu, Aug 4, 2022, 9:43 AM Ken N2VIP < ken@...> wrote: What a neat little radio, thanks for sharing.
Something like that, if it could be kitted out at $50 or so would make a great club project, but kiting up such a project is way beyond my skill set.
I know you're not offering it as a kit, just dreaming - thanks again for sharing your projects! Ken, N2VIP ? I had presented an all analog radio at the FDIM this year (not the expected sBitx!).? It is a fun radio. No, this will not have kit, you are on your own.
The write up is now up on my website at?
- farhan
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Re: The Daylight Again - An All analog radio
What a neat little radio, thanks for sharing.
Something like that, if it could be kitted out at $50 or so would make a great club project, but kiting up such a project is way beyond my skill set.
I know you're not offering it as a kit, just dreaming - thanks again for sharing your projects! Ken, N2VIP
toggle quoted message
Show quoted text
On Aug 3, 2022, at 22:56, Ashhar Farhan <farhanbox@...> wrote:
? I had presented an all analog radio at the FDIM this year (not the expected sBitx!).? It is a fun radio. No, this will not have kit, you are on your own.
The write up is now up on my website at?
- farhan
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The Daylight Again - An All analog radio
I had presented an all analog radio at the FDIM this year (not the expected sBitx!).? It is a fun radio. No, this will not have kit, you are on your own.
The write up is now up on my website at?
- farhan
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Can't go wrong with Bender -- '72
Aaron K5ATG
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WOW, Never ran that much thru rg6u quad shield. have run consistantly 150 watts thru it when i owned a QRO rig.
good for you. I buy mine thru either walmart or homedepot or menards depending on when they have a sale. i buy the twist on connections . I dont like the crimps since they are prone to sharp edges if crimped wrong and be a point of possible interference? and moisture.I also seal mine with a caulking friendly to the coax.
The 1:5 on my ubitxs are no problem either . All my rigs have rg6u quad shield from start to finish and i have rg6u jumpers with twist on connectors for testing ,etc.What i dont spend on the rg8x,i can splurge on good f to pl259 fittings,and extra cable in case i have a blowout or something else.All my feeds are buried ,run thru 1/2" pvc so if i need to replace a feedline,just tie onto it with new cable and pull.
WOW Again on the 800 watts thru it
73 David ac9xh good thru hamcall.net,qrzcq.com and FCC
On Wednesday, August 3, 2022 at 02:16:44 PM EDT, Aaron K5ATG via groups.io <k5atg@...> wrote:
"I also use the quad shield with good results up to about the 800watt level"? WOW I consider 20 watts to be high power lol -- '72
Aaron K5ATG
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Anybody have vector graphic versions of kd8cec nextion screens?
Looking to create a consistent set of nextion screens at their native resolution. ?Anybody have a set of drawings in a vector graphics form that can be resized for each platform? ?Only seen bitmapped versions that were optimized by individuals for each platform.?
73
Mark
AJ6CU
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On 8/3/2022 13:10, Aaron K5ATG via groups.io wrote: Although I might be able to put the Voyager plaque and put some clothes on the man and lady so my 19 year old son doesn't destroy it for displaying hard-core pornography (He is Autistic with Aspbergers and considers people holding hands to be hard-core porn.) I prefer the attached version. We meatbags had our chance... -- Tom Sevart N2UHC St. Paul, KS
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Re: A short video of sBitx working
You forgot the Christmas transmission. My son and I visited the site a few weeks ago. The transmitter is started several times during the year.
The signals go into a very big dummy load.
de 0z9ny, niels
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Re: sBitx antenna-first warning
Here is one of many posts from Allison that are worth reviewing, mentions the 6m 225W power amp she built using 4+4 IRF510's in push-pull. The whole thread is worth a read. ?? /g/BITX20/message/22597She has been contributing to the forum for some time now: ?? /g/BITX20/message/14514?? /g/BITX20/message/869Just plugging a new fet into the sBitx likely won't solve anything. The circuit around it should be designed specifically for that part for good performance. Jerry, KE7ER
On Wed, Aug 3, 2022 at 10:14 AM, Jerry Gaffke wrote:
The IRF510 can work dependably, Allison reports years of success with HF amps at 40W push-pull,
surviving everything from accidental open antenna connections to dead shorts.
In posts to this forum from several years ago, Allison went into plenty of detail.
She even used them on 6m at several hundred watts (with bunches of them in parallel).
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Bob Benedict, KD8CGH
Aaron K5ATG
