Re: Audio isolation w/ digital modes
#ubitx
The computer? audio controls can easily adjust for moderate mismatches.? Use the $7 sound card direct to the uBITX speaker and mic jack. Your computer's sound control, plus controls in wsjtx/Fldigi, will make all the adjustments.??
I've used 1:1 isolation transformers with DC blocking caps.? And also? i've gone straight to the? sound card.??
Both work. Simplicity suggests go direct to the USB sound card. Adjust levels in the PC/app.
No complicated audio i/o interface? is required.
Don
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Re: Frequency calibration V5
Apparently, V6 firmware can be used on earlier rigs, making a minor adjustment if you have a 12mhz IF. Searching for "set_calibration" in ubitx_setup.ino for V6, it appears that this new code is using the algorithm of? ? /g/BITX20/message/71281Which is most welcome. The V6 code adjusts the si5351bx_vco in steps of 875 hz. All three si5351 outputs (and consequently the rig operating frequency) are locked into ratios of that 875mhz VCO. So if operating at 10mhz, the operating frequency is 875mhz/87.5=10mhz, and the calibration granularity is 875hz/87.5 = 10hz. And if operating at 30mhz, then the calibration granularity is 30hz, given the 875hz step size of the code in ubitx_setup.ino. A step size of 875 should be fine for most, but there is nothing special about it. You could change the value of 875 in ubitx_setup.ino to anything you want, and recompile. Larger step sizes will make calibration proceed faster, smaller step sizes will allow you to set the frequency more accurately. Though to be very accurate, you will need to monitor the audio with a scope, and hope any DC blocking caps in the audio chain will pass low enough frequencies.? ? (I haven't looked too hard at the code yet, I assume he is moving the BFO into the center of the IF filter passband so you can hear a proper zero beat at very low audio frequencies.) Calibrate using a signal source at the highest frequency for which it is convenient. Calibrating to WWV at 10mhz will be 10 times more accurate than calibrating to an AM broadcast station at 1mhz. Most AM shortwave broadcasting stations have a carrier within a hz or two of a 5khz increment. If unsure how accurate that station is then verify by checking calibration against a different station. This procedure was outlined in post 35235 over 2 years ago, when the uBitx was first announced. Rather distressing to see all the posts in the forum from folks spending days trying to figure out how to calibrate. Jerry, KE7ER
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@David W9PH
If you want to add simple morse decoder without building it
73 KB1HKO
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On Sat, Dec 14, 2019 at 1:21 PM Ashhar Farhan <farhanbox@...> wrote:
Aah, i havent tried that out. I did try the kx3 cw reader though. Just getting it to read was voodoo. The user interface was erratic, the way settings worked was opaque and the tuning indicator was inaccurate. Maybe I didn't get a proper hang of the thing.
- f
On Sat 14 Dec, 2019, 11:14 PM Eric Thielking, <ewthielking@...> wrote:
Respectfully, the on-board decoder on the K3 works well.
On Sat, Dec 14, 2019 at 12:38 PM Ashhar Farhan <farhanbox@...> wrote:
By morse reader, I actually meant software that reads out the screen in morse code.
I had fooled around with many morse decoders. Nothing really works on the bands. CW skimmer is the only thing that works under contest conditions.
So, if you want a morse code decoder that really works well, can adapt to any radio and needs no special hardware, then, spend a month, 20 minutes a day and practice at 30 wpm.
- f
On Sat 14 Dec, 2019, 9:56 PM splat1956, <dnrabin7@...> wrote:
Hi
This is very exciting. I have been thinking a long time but have not purchased one because I was afraid that the soldering and wiring instructions would be confusing. There have been many posts by confused builders.
This sounds great. Is there a morse code decoder built in or coming soon ? Your earlier post said " I have added a morse reader already. I shall finish integration to the user interface soon."
Please let us know when that is incorporated. I am unlikely to upgrade the software-firmware once it is working and that would be a very nice feature.
Great idea on the calibration with a known station signal for people without test equipment.
Thank you very much for this great upgrade !
David W9PH
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Re: Which version of the XPT2046_Touchscreen library is used by the V6 ?
Lemme check. It will take me 24 hours as I am out of town right now
On Sat 14 Dec, 2019, 11:33 PM GM4CID, < gm4cid@...> wrote: Hi, there seem to be several XPT2046_Touchscreen libraries on Github, wondering which one is correct to use ?
73, Bob GM4CID
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Aah, i havent tried that out. I did try the kx3 cw reader though. Just getting it to read was voodoo. The user interface was erratic, the way settings worked was opaque and the tuning indicator was inaccurate. Maybe I didn't get a proper hang of the thing.? - f
Respectfully, the on-board decoder on the K3 works well.? On Sat, Dec 14, 2019 at 12:38 PM Ashhar Farhan < farhanbox@...> wrote: By morse reader, I actually meant software that reads out the screen in morse code. I had fooled around with many morse decoders. Nothing really works on the bands. CW skimmer is the only thing that works under contest conditions. So, if you want a morse code decoder that really works well, can adapt to any radio and needs no special hardware, then, spend a month, 20 minutes a day and practice at 30 wpm.? - f
On Sat 14 Dec, 2019, 9:56 PM splat1956, < dnrabin7@...> wrote: Hi
This is very exciting. I have been thinking a long time but have not purchased one because I was afraid that the soldering and wiring instructions would be confusing. There have been many posts by confused builders.
This sounds great. Is there a morse code decoder built in or coming soon ? Your earlier post said " I have added a morse reader already. I shall finish integration to the user interface soon."
Please let us know when that is incorporated. I am unlikely to upgrade the software-firmware once it is working and that would be a very nice feature.
Great idea on the calibration with a known station signal for people without test equipment.
Thank you very much for this great upgrade !
David W9PH
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Which version of the XPT2046_Touchscreen library is used by the V6 ?
Hi, there seem to be several XPT2046_Touchscreen libraries on Github, wondering which one is correct to use ?
73, Bob GM4CID
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Re: Audio isolation w/ digital modes
#ubitx
I put 2 1:1 audio transformers into my V4 and put 2 mono jacks on the back that I run to a $7 usb sound card on my pc. I ran the nano¡¯s usb to a connector on the back for CAT.?
I put ferries on the usb and audio lines to the PC.
No issues with audio levels. The power slider on WSJT-x adjusts the level from the PC, and the volume adjusts the level to the PC.
--
John Faivre?WA9SGD
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Respectfully, the on-board decoder on the K3 works well.?
On Sat, Dec 14, 2019 at 12:38 PM Ashhar Farhan < farhanbox@...> wrote: By morse reader, I actually meant software that reads out the screen in morse code. I had fooled around with many morse decoders. Nothing really works on the bands. CW skimmer is the only thing that works under contest conditions. So, if you want a morse code decoder that really works well, can adapt to any radio and needs no special hardware, then, spend a month, 20 minutes a day and practice at 30 wpm.? - f
On Sat 14 Dec, 2019, 9:56 PM splat1956, < dnrabin7@...> wrote: Hi
This is very exciting. I have been thinking a long time but have not purchased one because I was afraid that the soldering and wiring instructions would be confusing. There have been many posts by confused builders.
This sounds great. Is there a morse code decoder built in or coming soon ? Your earlier post said " I have added a morse reader already. I shall finish integration to the user interface soon."
Please let us know when that is incorporated. I am unlikely to upgrade the software-firmware once it is working and that would be a very nice feature.
Great idea on the calibration with a known station signal for people without test equipment.
Thank you very much for this great upgrade !
David W9PH
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Re: Audio isolation w/ digital modes
#ubitx
Hello,
After building few Ubitx , my experiment regarding digital mode is to tap the audio prior the LM386 on the R70 resistor.? this option is providing a fix audio level and you dont need to use the volume potentiometer to adjust the level but the volume control from your computer. Ater some quick testing it is quit easyvto find out the suitable decoding level. i add a switch in order to separate the Mic from the digital audio input . in addition i add a 1:1 transformer and a 4,7nf capacitor in serial in order to isolate and adapt the input level for decoding.
73's Didier
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By morse reader, I actually meant software that reads out the screen in morse code. I had fooled around with many morse decoders. Nothing really works on the bands. CW skimmer is the only thing that works under contest conditions. So, if you want a morse code decoder that really works well, can adapt to any radio and needs no special hardware, then, spend a month, 20 minutes a day and practice at 30 wpm.? - f
On Sat 14 Dec, 2019, 9:56 PM splat1956, < dnrabin7@...> wrote: Hi
This is very exciting. I have been thinking a long time but have not purchased one because I was afraid that the soldering and wiring instructions would be confusing. There have been many posts by confused builders.
This sounds great. Is there a morse code decoder built in or coming soon ? Your earlier post said " I have added a morse reader already. I shall finish integration to the user interface soon."
Please let us know when that is incorporated. I am unlikely to upgrade the software-firmware once it is working and that would be a very nice feature.
Great idea on the calibration with a known station signal for people without test equipment.
Thank you very much for this great upgrade !
David W9PH
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On Fri, Dec 13, 2019 at 03:41 PM, Dave Dixon wrote:
just ordered my V6 looking forward to receiving it next year..Im hunting around for a variable cw filter..any ideas guys.,Dave G0AYD
I'll probably be ordering one of these: Here's another option if you want to spend more: John AE5X
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Hi
This is very exciting. I have been thinking a long time but have not purchased one because I was afraid that the soldering and wiring instructions would be confusing. There have been many posts by confused builders.
This sounds great. Is there a morse code decoder built in or coming soon ? Your earlier post said " I have added a morse reader already. I shall finish integration to the user interface soon."
Please let us know when that is incorporated. I am unlikely to upgrade the software-firmware once it is working and that would be a very nice feature.
Great idea on the calibration with a known station signal for people without test equipment.
Thank you very much for this great upgrade !
David W9PH
|
NIB-uBITx Version 3, Un-Built
I have for sale an AS NEW In Plastic Shipping container uBitx Version 3. It was produced Prior to May, 2018 as it has the TDA2822 Audio Chip soldered to the PCB.
It is Un Built and AS New. Received 01/10/2018.
Asking Price : $90.00 and $5.00 for shipping. Total: $95.00 Shipped to US Addresses. If international buyer, then actual shipping cost will be applied.
Accept: PAYPAL. Money Order, or Check.? Please allow time for MO/Check to clear bank before shipping.
Please send any questions to kevinemtid at sbc global dot net .
Thank you Farhan for making a Great Rig! I am still working on my Bitx 40.??Yes I am a bit Behind in my projects!?But I Plan on acquiring a newer version uBitx in the future..?
73, Kevin NZ1I
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Re: Frequency calibration V5
I have not used it, so cannot attest to the accuracy. To help speed up the process you might want to read this thread and try the calibration spreadsheet. /g/BITX20/message/72183?p=,,,20,0,0,0::Created,,calibration+spreadsheet,20,2,0,34330593A take away from this that using the search function of the messages is one of the best ways to find out if someone else has already gone through the issue.? Being a relatively long time user of this site, and reading most of the messages, I can see that the same problems keep coming up. I would suggest that a new member guide be part of the prerequisite for membership.? Part of that instruction should be the best way to find information on the sire.? This would be both helpful to the new member, and reduce the amount of rehash that seems to go on.? I can state that having to reiterate prior solutions to new members does get old after 3 or 4 times.? Calibration is one of those that keep coming up.? I had to use the search function myself to find the above thread.? It would have sped up the process for Morris if he knew about that feature in Groups.io. Above are my thoughts, yours may be different, and that is OK 73 Evan AC0TU 73 Evan AC9T
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Hi Gordon,
Either way we setup the dial is right. Either way is wrong. If we use it the wrong way. As we have both said, we have to know how the radio in front of us works if we are going to have good results. That means we don't have any part of our emission outside the band AND our signal is where the other ham can hear it. For SSB we must present the right sideband, too.
Once upon a time I got a headache sorting it all out. At that time the headache medicines had a commercial showing Thor's hammer inside a human head striking an anvil complete with lightning strikes. If you remember those you will know it was at least a week ago:)
73,
Bill KU8H
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On 12/13/19 8:35 PM, Gordon Gibby wrote: Aargh. ?I may be wrong here! ? If I am, my apologies, it makes my head spin a bit. ? I¡¯ll have to go fiddle with the radio and try it out.
--
bark less - wag more
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Re: Frequency calibration V5
Hey Chuck, Sounds like your experience?is quite a lot like mine. One difference is that I have a digital frequency meter.? I use that to transmit on a known frequency and then compare it to the frequency on the meter. The biggest problem I had? was that I never was able to get any movement of indications during calibration. I was forced to do the calibrate ?a little then check where the frequency was after that calibration
The biggest problem I had using the calibrate for a small number then check, then calibrate again and check, over and over. That procedure did move the frequency but in a very random way. For example, it would be a couple of thousand off, like xmit 28,000,300 and meter 28,003,678 and I would move by +100 in the calibration. The result would be somewhere around the target frequency but sometimes above the target and sometimes below. I would then calibrate again moving by -100 and it would not come back to the prior setting. Also if I did this with small shift numbers like 5 to 10 the results were very random. Finally, I just kept calibrating over and over with random small numbers until I just happened to land on a number that was less that 30 cycles off and left it that way. I am pretty sure that when I do the BFO calibration the frequency stuff will be off.
The largest issue is that calibration does not work like the documentation states in terms of being able to shift calibration while observing where the calibration is. Because of this lack of function the repeated calibration method is very difficult due to the random effect of? calibration based on the number input during calibration. My suspicion is that there is a calculation problem when trying to come up with an actual frequency change.
By the way I was using a calibration in the 10 meter area to keep the power level down going to the frequency meter.
Maybe this stuff will help move to discussion about calibration forward a little.
Morris K7LSV
The firmware instructions for calibration for ver 5 appear to be incorrect. I achieved calibration by many iterations of the following: Tune to 10.000 MHz on the dial. (WWV will actually probably be 1.5 kHz lower.) Go to Settings, then Calibration. (The unit will go into TX.) Rotate tuning to increase the offset number shown to say 10. Exit settings, then exit menu. Check where WWV is now. Repeat until zeroed.?
During these?iterations you may have to intersperse going to Settings, Calibration, Bfo to lower the audio spectrum band to where you are able to hear WWV clearly.? ? If you are out of range of WWV you will need a replacement 10 MHz source.
After calibration you then need to place the Bfo correctly within the filter. Unfortunately, the firmware does not quite move the calibrated frequency in parallel, so you may have fine tune calibration again.??
I would appreciate hearing about a faster method.
Chuck w8mqw
I neglected to say: This a new just built v5. It has CEC firmware v 1.20. IT has a nextion 3.2 display.
Any help greatly appreciated.
Morris K7LSV
On Fri, Dec 13, 2019 at 9:31 AM Morris Ford via Groups.Io <morrishford= [email protected]> wrote: I am trying to calibrate a V5 box using a frequency meter. I need someone to interpret the instructions for that in the user manual for CEC software. I tried just transmit and adjust and not the ing happens. I tried into calibrate and transmit and the adjust and nothing happens.?
Any help?
Morris
K7LSV
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The best advice I can give is to go to hfsignals and and read the calibration info.? I searched on "how to calibrate ubitx" and got links to both.? That info, along with what you have, should get your unit calibrated.? If you have a specific problem during calibration, come back to the list.? Dale --
Dale Hardin, KS4NS
Elberta, AL
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For those who like Paypal security when ordering, the 2.8" displays are awash on ebay.
Here is one link I found:
73 Steve
G1KQH
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If you have adjusted the bias then GATE cannot be 0V.
Check voltage on R97 and 98 both sides of the resistors and see what you
get.
When KEY down the TX has RF in CW mode and readings will go haywire.
At 14/12/2019, you wrote:
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opps (sorry, hit enter too
soon)
q94
D? 15/15/7+-
G? 0/0/-.09
S? 0/0/0
q95
D? 15/15/7->8+-
G? 0/0/-.10
S? 0/0/0
With key down, the Gates move around a bit.
Thanks so much for all help here!!!!!!
![[]](/g/BITX20/attachment/73636/)
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F5NPV
Kevin Gilot NZ1I
Dale Hardin KS4NS
Raj vu2zap
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