Re: Automatic antenna tuner (N7ddc) and loop antenna
Hi Gerards,
Have You seen this project? Den tors 12 nov. 2020 kl 14:36 skrev Gerard < kabupos@...>:
Otherwise, I wonder if the change in the value of the capacitor on the LOOP antenna, will not actually cause a runaway system....because autmatic Tuner will adapt new value, etc
Another track to dig directly on the Ubitx, is to make a logical table (On/Off) of the filter relays before the antenna function of the frequency band (There we already know that it does not move on a band)
The top would then be to use on a 2nd nano, (That exist)? the control of each capacitor relay?of the loop antenna could be done directly on each frequency band.
Keep in mind that this 2nd nano has existing functions (SWR etc), so use free legs on it. This requires soft.
I think you understand the idea
cdt
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Re: Automatic antenna tuner (N7ddc) and loop antenna
Otherwise, I wonder if the change in the value of the capacitor on the LOOP antenna, will not actually cause a runaway system....because autmatic Tuner will adapt new value, etc Another track to dig directly on the Ubitx, is to make a logical table (On/Off) of the filter relays before the antenna function of the frequency band (There we already know that it does not move on a band)The top would then be to use on a 2nd nano, (That exist)? the control of each capacitor relay?of the loop antenna could be done directly on each frequency band.
Keep in mind that this 2nd nano has existing functions (SWR etc), so use free legs on it. This requires soft.
I think you understand the idea
cdt
|
Automatic antenna tuner (N7ddc) and loop antenna
Hello,
look the datasheet of this automatic tuner antenna?
When I look at this diagram, we see a set of selfs and capacitors that are selected by relays. (Cpu choice to active or not)
Basically the assembly has a kind of TOS meter that will allow the best choice of relays.
Questions are:
Are the same relays used in reception and emission on the same frequency?
Can they change on a scan of a frequency band? ex 7.00 to 7.3 MHZ.
The idea is to resume the choice of relays (via a control pcb and cabling) and switch HT capacitors to the LOOP antenna. (After calibrate with a variable capacitor and safe the values)
Well, after that, there are probably ready-made montages. It¡¯s just a reflexion
cdt
|
Thanks Jerry,
Concerning the tx, we are not working on HF ham bands. We'll use an
experimental license (if it works ok without the SSB filter), in order
to carry the HF wide-band experiment.
Rafael
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On 11/11/20 10:17 PM, Jerry Gaffke via groups.io wrote: Rafael,
Bypassing the SSB filter would make the receiver be wideband,
but you would lose single signal reception.? You will hear signals on
both sides of?the BFO, not just one side as you do with the filter in
place.
Try it, just tack a wire from one side of the filter to the other,
from header CW-1 pin 1 to header CW-2 pin 1 in the uBitx v6 schematic.
Could be educational.
Could even be useful, allowing one to quickly tune across the band
when looking for signals.
Bypassing the SSB filter when transmitting would create an illegal
wideband transmission
on the HF bands.
Jerry, KE7ER
On Wed, Nov 11, 2020 at 11:53 AM, "Rafael Diniz"
<rafael@...> wrote:
Hi everybody,
I bought two ubitx v6, and now I'm waiting them to arrive. One
question
about wideband operation - if I bypass the SSB filter, could I get a
clean 15kHz wide operation?
Thanks,
Rafael PU2UIT
|
Re: PA rx/tx and swr protection connection to ubitx / arduino nano
Thanks a lot, Reed. One pin will be enough. As soon as I finish the swr
protection circuit I send here - one idea is just to signal the
"cut-off" signal, other will be send a signal in voltage range which
will represent the actual SWR, to be displayed to the user, also also
cut the tx above a threshold (I'll need to modify a bit more the arduino
firmware in this case, in order to add the graphics elements).
Rafael
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On 11/12/20 4:07 AM, Reed N wrote: Hi Rafael,
A7 is analog input that isn't currently used in the stock code, but
could be used to read a binary signal if you wanted. You'd probably
want to leverage the existing T/R output to activate the PA. Hard to
give much advice without knowing what control signals your circuit needs.
I use an EasyDigi between my computer and uBiTX. I don't think it's
strictly necessary, but it does buy some peace of mind, having the
isolation.
Reed
|
Evan,
Thanks
You have also this one
With some modifications to do, etc? but it's an old time!!! LOL
Use ggogle translate for english
Have a nice day
cdt
|
Gerard,
The HW-8 was a kit from Heathkit for a QRP direct conversion transceiver.? Here is an English page for a description:
73
Evan
AC9TU
|
hello,
Hw-8. I dont know what is it? Is it a fabrication of this style? A Heathkit year 80?
?I would really like to see a similarly placed, larger layout with through hole components? >>> That exist...
cdt
|
Holy words ... Farhan ... I agree with you !
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Re: PA rx/tx and swr protection connection to ubitx / arduino nano
Hi Rafael,
A7 is analog input that isn't currently used in the stock code, but could be used to read a binary signal if you wanted. You'd probably want to leverage the existing T/R output to activate the PA. Hard to give much advice without knowing what control signals your circuit needs.
I use an EasyDigi between my computer and uBiTX. I don't think it's strictly necessary, but it does buy some peace of mind, having the isolation.
Reed
|
Re: Calibrated now no receive.. Ubitx V6
I'm glad to hear you're up and running again! I'm a little confused by the "Locosc from your setting of 110553300" statement, since that number looks more like a BFO calibration number than a local oscillator, but it doesn't matter too much as long as you're on frequency now.
My cal:
Local oscillator: 138,850
BFO: 11,055,300
Your cal (as written):
Local oscillator: 178,000,000
BFO: 11,055,300
A brief explanation:
The local oscillator calibration corrects for any error in your specific frequency generator chip and it's crystal. It determines if your system frequencies match the display frequencies.
The BFO frequency calibration it's specific to your radio's BFO crystal filter, and ensures that the right side band signal gets through the filter, and is passed to the audio stages.
With that in mind, the difference in our values can be explained by us having similarly tuned BFO filters, but your radio having a larger discrepancy between actual frequency generation and expected frequency generation. Based on your local oscillator cal value, it seems like your local oscillator reference may be running closer to 30MHz than the 25MHz the code expects. Nothing wrong with that if it's true.
Reed
|
Might work on FM (?) since FM Broadcast requires greater bandwidth. Have to get tricky in other ways too, though.
I had a Yaesu FT-100 and while it would receive in the FM broadcast band, the stations only came through with certain tones when the station's audio was in the passband of the receiver's filter. One of the reasons I traded it off.
Bob ¡ª KK5R
On Wednesday, November 11, 2020, 8:18:02 PM EST, Jerry Gaffke via groups.io <jgaffke@...> wrote:
Rafael,
Bypassing the SSB filter would make the receiver be wideband,
but you would lose single signal reception.? You will hear signals on
both sides of?the BFO, not just one side as you do with the filter in place.
Try it, just tack a wire from one side of the filter to the other,
from header CW-1 pin 1 to header CW-2 pin 1 in the uBitx v6 schematic.
Could be educational.
Could even be useful, allowing one to quickly tune across the band when looking for signals.
Bypassing the SSB filter when transmitting would create an illegal wideband transmission
on the HF bands.
Jerry, KE7ER
On Wed, Nov 11, 2020 at 11:53 AM, "Rafael Diniz" <rafael@...> wrote:
Hi everybody,
I bought two ubitx v6, and now I'm waiting them to arrive. One question
about wideband operation - if I bypass the SSB filter, could I get a
clean 15kHz wide operation?
Thanks,
Rafael PU2UIT
|
Rafael,
Bypassing the SSB filter would make the receiver be wideband,
but you would lose single signal reception.? You will hear signals on
both sides of?the BFO, not just one side as you do with the filter in place.
Try it, just tack a wire from one side of the filter to the other,
from header CW-1 pin 1 to header CW-2 pin 1 in the uBitx v6 schematic.
Could be educational.
Could even be useful, allowing one to quickly tune across the band when looking for signals.
Bypassing the SSB filter when transmitting would create an illegal wideband transmission
on the HF bands.
Jerry, KE7ER
toggle quoted message
Show quoted text
On Wed, Nov 11, 2020 at 11:53 AM, "Rafael Diniz" <rafael@...> wrote:
Hi everybody,
I bought two ubitx v6, and now I'm waiting them to arrive. One question
about wideband operation - if I bypass the SSB filter, could I get a
clean 15kHz wide operation?
Thanks,
Rafael PU2UIT
|
Re: Calibrated now no receive.. Ubitx V6
Reed N
Thank you very much for the push in the right direction. Your baseline settings (brilliant idea btw) put me right on track.
The BFO was spot on and I had to adjust the Locosc from your setting of 110553300 to 178000000. Quite a jump but seems to be working.
Any thoughts on that jump.
Baseline settings seem top be the way to go. :-)
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PA rx/tx and swr protection connection to ubitx / arduino nano
Hi all,
I'm like to add to the ubitx a PA and swr protection circuit. I realized
all the pins in arduino nano are taken, is this correct? Which paths you
suggest I should go to connect control signals between the PA and swr
protection circuit (to immediately switch the radio to rx mode and block
tx) to the arduino nano in the ubitx?
Concerning the signal path, when connecting the mic / speaker ports of
the ubitx to a computer (line in / line out), do you recommend any
special wiring / isolation?
Thanks!
Rafael
|
I've RFed an Arduino Uno in the past and scrambled it. Had to reprogram it and it was fine afterward.
Give it a try rewriting it. When I RFed the Uno some of the functions were still working, just not all.
Vince - K8ZW.
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On 11/10/2020 11:54 PM, Gary Rindfuss wrote: Thanks for your feedback. It may have been that RF got in there in the
first place and scrambled something in the raduino? Maybe an Eprom? I
had an antenna issue for a bit my doublet was touching a tree after a
storm. It was tuned by my autotuner but it had to be very unbalanced.
But now you can't even get it to configure wsjtx to talk to the radio.
It reports an error around reading vfo freq before you can ever transmit.
On Tue, Nov 10, 2020, 11:02 PM Vince Vielhaber <vev@...
<mailto:vev@...>> wrote:
Before you give it a go, take a look at both the power supply and/or
possibly getting RF into the raduino. It works in SSB, right? Lighter
duty.
Vince.
On 11/10/2020 07:14 PM, Gary Rindfuss wrote:
> Thanks I will give it a go!
>
> On Tue, Nov 10, 2020, 6:31 PM Dean Souleles <dsouleles@...
<mailto:dsouleles@...>
> <mailto:dsouleles@... <mailto:dsouleles@...>>> wrote:
>
>
> Amateurradiokits.in
>
> Dean
> KK4DAS
>
>
--
K8ZW
--
K8ZW
|
Re: Calibrated now no receive.. Ubitx V6
If you're using my software, there is no computer backup feature, and you can reset all. That said, I would recommend you note the current values for your own reference.
For calibrating, have you tried using some "known good for others" values? I would expect those to get you close. My v6 is set to 138850Hz for the LocalOsc cal, and 11055300Hz for the BFO. You might see if those numbers get you close enough to hear again.
Reed
|
Hi everybody,
I bought two ubitx v6, and now I'm waiting them to arrive. One question
about wideband operation - if I bypass the SSB filter, could I get a
clean 15kHz wide operation?
Thanks,
Rafael PU2UIT
|
Calibrated now no receive.. Ubitx V6
After several attempts at calibrating and was close I did one last one and now have no receive. Only tried for 5 hours....
Also when I hook the unit up to the computer it doesn't show up. Have tried 3 different cables.
I see there is a reset option but I have not backed it up and reading online indicates a backup is necessary as is the computer interface. Is this still valid with Version 6 or can I bash on and reset it to factory without a backup/computer/
|
Mark
That "segmentation fault" would seem to be happening in your computer? or in the Visual Studio software you are using to?compile code for your? Arduino.? This seems unusual because we usually see segmentation faults? in code that has been compiled and then run on some other target computer. If I read this correctly your segmentation fault is happening in the computer? you are using to edit and compile code for use on an Arduino.
Segmentation faults are usually caused by jump or write statements that? try to access memory inappropriately, or try to write to memory that is? not accessible to the program being run.? It can be caused by memory? faults, code errors, or CPU problems.??
This problem may be hard to locate and maybe even more difficult to fix.?? Core dumps may indicate where the fault is happening, but the segment? fault may destroy any footprints left behind by its action, depending on? where it tried to go and what it tried to do there.
This reference may give some insight into the problem, but it appears that? Visual Studio may have been written in Python, so the problem could also? be in the Python interpreter.? Check that your version of PY code is compatible with the release version of Visual Studio that you have installed.
? ??
There are other on-line discussions that appear to address segmentation? faults with Visual Studio.
? ??
Most of us are using the Arduino IDE for our work with AVR & Arduino systems.
? ??
The Arduino IDE shown in some Linux repositories shows as version 2.x when? in fact it is actually release 1.0 or earlier.? This is because of a disagreement? between the IDE builders and the Linux community.? If you are going to use the? latest Arduino IDE on Linux you really need to go to the Arduino IDE web sight? and download and install release 1.8.x directly from there.
Arv _._
I hope this question is appropriate here, since this is a problem when compiling my uBITx code.
I'm using VSCode to do my Arduino coding. It took some setting up, but it is working well most of the time. Every once in a while, when I make a change to the code and compile it, GCC is reporting a segmentation fault. If I exit and restart VSCode, the next compile goes fine.
I don't know whether this is related or not, but every time I open an Arduino project workspace, VSCode displays an error popup:
Conflicted extensions with IntelliSense service were detected (Arduino). Code-completion, linting and navigation will not work properly. Please disable or uninstall them (Menu > View > Extensions).
I ignore this and (other than the occasional segmentation?fault), everything still seems to work.
Versions:
VSCode: 1.48.2
PlatformIO Extension: 2.10
Arduino Extension: 0.3.2
Arduino: 1.8.9
I know there are newer versions of Arduino available, but there the serial monitor in VSCode doesn't work with them.
Any ideas, 73,
Mark
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Gerard
Bob Lunsford