Date   
Re: #bitx40 BITX40 Winlink configuration #bitx40

Gordon Gibby
 

Very good!

Although I am sort of distracted right now,  I made several WINLINKconnections with the uBitx and a nonresonant  sloper dipole with a tuner.  It’s not a lot of power, so you have to choose your stations and time of day carefully, night will usually work better than day, but it clearly works

The stock audio bandwith is a tiny bit narrow, so the 500 Hz modes may work a little better




On Oct 2, 2018, at 16:44, Daniel Crane <danjamitch@...> wrote:

For the record, here's what I have running winlink -
BitX40, stock 5W more or less
Pac Ant 20/40 trap dipole, inverted Vee on broken sailboard mast
Surface Pro/WIN10
Winlink Express 1.5.14.2
WINMOR on built in sound card
TRRS splitter, SPK & MIC cables with 10K series resistance
PTT via USB/UART adapter, RTS, signal conditioning by 2N2222, official transistor of BitX radio
Dan
KM6GRV

Re: W0EB's uBITX with 5" Color "mouse" Screen 1st QSO!!! #ubitxcw #ubitx

Alan G4NMA
 

On Mon, Oct 1, 2018 at 09:21 PM, Jim Sheldon wrote:
CT9/OM7LW
Interesting. I will be visiting Madeira for a week between 15/10 and 22/10. I wonder if he will still be active.

Re: W0EB's uBITX with 5" Color "mouse" Screen 1st QSO!!! #ubitxcw #ubitx

Jim Sheldon
 

Shortly after I worked him, another CT9 call (I didn't write it down) was being used so I suspect he was operating from a local ham station somewhere on Madeira.  I don't think it was a DXpedition, just operating from some local hams station.

Jim

------ Original Message ------
From: "Alan G4NMA" <alan@...>
Sent: 10/3/2018 6:28:40 AM
Subject: Re: [BITX20] W0EB's uBITX with 5" Color "mouse" Screen 1st QSO!!! #ubitxcw #ubitx

On Mon, Oct 1, 2018 at 09:21 PM, Jim Sheldon wrote:
CT9/OM7LW
Interesting. I will be visiting Madeira for a week between 15/10 and 22/10. I wonder if he will still be active.

Re: VK4PP uBitx scratch built.

Skip Davis
 

Those boards are really neat Nick, what size SMD parts is this setup for?

Skip Davis, NC9O

On Oct 3, 2018, at 04:29, Nick VK4PP <nickpullen@...> wrote:

And so it begins. These are my SMD proto/scratch built boards. 100mm X 100mm cost was $8 for 10, posted, I am pretty happy how they turned out.
73 Nick VK4PP.

<IMG_20181003_182525.jpg>

Re: I find This Shorted Circuit on Raduino, here the pics..plz Help? #ubitx-help

sdr freak
 

Hallo thank you for your answer
 
In the last of my written thread, "shortet in raduino...) i have post in the forum, you write to me some things...
 
About this things you have written with the Bandwidth I make some Thinking about and now i have one question when the Calibration is not bad and all other things i have checked give no success then i have a new idea...
 
My question to you is how can I measure bandwidth with the cellphone and a app to analyse the ubitx given output from SSB so that i can see if it was ok or if it was too small...
 
That is my new idea, when the ssb filter was interrupt or wrong built up in the factory by false things on the pcb, then it could or it should be the main problem which i have by heared never a ssb voice at complete bandwidth and it was only 1,7khz instead of 2,3 or 2,7khz and now when i make at the pcb any other setted ssb filter construction then it should work?? 
 
What about an variable IF resistor added to the filter can help this or is that idea an other thing what doesn't bring success here?
 
Because this is the only idea i have with the "ssb hear problem" to repair..
 
But there is an other problem i thought when i see the loudness is very very low and i can not find the issue, maybe the TDA2822 fci is the problem? But then i should hear nothing when that was false or is there an other way to become louder sound? I use 8ohm 0.5w speaker but before i had 1w 8ohm and i have changed this and it was not louder too... It was my idea to make some things to become louder output and add then a homebrew agc... Can you help me there again?
 
Please forgive my low level knowledge about circuits and if my ideas are wrong, and my english ... I really thankfully at help!
 
Thanks greetz Fabian

Re: Right-sided relay harmonic attempted fix for v3/4 ubitx

Bob Twiggs
 

Hi Gordon,
If you order boards again I would be interested in buying two for my 2 uBItx kits.
Thanks,
Bob
KM2Q

Cfrrier suppression

George
 

Hi  All! To be tested: all band mBITX, 40-ty m. band, R110 -150 Om, C 68-75 pF parallel BAT54SL (points 2-4 of the transformer, carrier from -26 dB moved down to -40.
PA output is 10 W on this band.  73! 

uBitx Software Update

YO8UFO
 

Hi everyone! I'd like to try some digital modes with my uBitx, so I should replace the factory firmware in order to gain CAT control.  I'm thinking about KD8CEC’s firmware. I have some previous experience with Arduino clones, so updating the information in the microcontroller won't scare me. What I'm concerned about is the calibration of the uBitx. Is it needed to save some files from the EEPROM? And about what EEPROM are people talking about? The memory core of the Arduino? I mention that I don't have access to any fancy lab hardware like signal generators or oscilloscopes. Thanks!

Re: uBitx Software Update

Rick Price
 

Daniel,
Currently using Farhan ubitz V4.3 code with CAT.  Works great with FlDigi and WSJTX.  No need to go to other code unless you want to.
 
Rick
KN4AIE

Re: uBitx Software Update

YO8UFO
 

Oh, really ? I just connect the USB to the computer and I can establish a communication through the COM port?

Re: uBitx Software Update

Rick Price
 

Yes, just like your uploading new software to the nano.  Set the parameters in WSJTX for Yaseau 817 correct com port and baud rate, use Cat for control.  Works great! FlDigi the same, just set the parameters correctly and Cat will work.  Of course you need to hook up the audio out from your computer to the mike in on the uBitx and make sure you do not connect the ring PTT wire at the uBitx.  Just the tip and sleeve.  I use my speaker out on the ubitx into the line in on the computer.  The slider on the right side of WSJTX can be used to control the audio  level out of the computer (modulation level) into the ubitx.  I use the volume on the ubitx to control the audio level into WSJTX and keep the level bar in the green. I have made a couple of hundred contacts including DX to Europe and S America.  Lots of fun on this little box.
 
Rick
KN4AIE



From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Daniel
Sent: Wednesday, October 03, 2018 12:57 PM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitx Software Update

Oh, really ? I just connect the USB to the computer and I can establish a communication through the COM port?

bitx40 Q14 question about collector voltage

Stephan Lauffer
 

Hi!

In different papers I read that the collector voltage on Q14 is round about PWR voltage -0.5V.

But if I read the circuit I don't see where this high voltage should come from. R144 has 2.2k and then there are R143 1K + R142 100K. So imho the collector should have round about 4V and round about 8V is on R144.

Am I wrong?

--
Liebe Gruesse, with best regards,
Stephan Lauffer
dc8lz

Re: bitx40 Q14 question about collector voltage

Stephan Lauffer
 

oh well... R144 is 2.2ohm and not 2.2k... (:

sorry.

Am 03.10.2018 um 19:56 schrieb Stephan Lauffer:

Hi!
In different papers I read that the collector voltage on Q14 is round about PWR voltage -0.5V.
But if I read the circuit I don't see where this high voltage should come from. R144 has 2.2k and then there are R143 1K + R142 100K. So imho the collector should have round about 4V and round about 8V is on R144.
Am I wrong?
--
Liebe Gruesse, with best regards,
Stephan Lauffer
dc8lz

Re: uBitx Software Update

Jens <hb9joi@...>
 

Hello ...
 
I am new with mBITX . Just got it yesterday and now already built in enclosure
and it runs good .
The firmware is the original from HFSIGNALS .
 
But something makes me not happy : the frequency tuning steps are to large , 100 Hz .
Which other firmware I could install and use with tuning steps , maybe 10 Hz ???
And how is the way to install another firmware without risk that the radio will then not more work ... ?
 
I have found something from KD8CEC , but for me as beginner it seems to be very complicate ...
to make an firmware update ... I need help , please !
 
73 , Jens / HB9JOI
 
+++
 
 
 

From: Rick Price
Sent: Wednesday, October 3, 2018 7:23 PM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitx Software Update
 
Yes, just like your uploading new software to the nano.  Set the parameters in WSJTX for Yaseau 817 correct com port and baud rate, use Cat for control.  Works great! FlDigi the same, just set the parameters correctly and Cat will work.  Of course you need to hook up the audio out from your computer to the mike in on the uBitx and make sure you do not connect the ring PTT wire at the uBitx.  Just the tip and sleeve.  I use my speaker out on the ubitx into the line in on the computer.  The slider on the right side of WSJTX can be used to control the audio  level out of the computer (modulation level) into the ubitx.  I use the volume on the ubitx to control the audio level into WSJTX and keep the level bar in the green. I have made a couple of hundred contacts including DX to Europe and S America.  Lots of fun on this little box.
 
Rick
KN4AIE
 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Daniel
Sent: Wednesday, October 03, 2018 12:57 PM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitx Software Update

Oh, really ? I just connect the USB to the computer and I can establish a communication through the COM port?

Re: VK4PP uBitx scratch built.

Nick VK4PP
 

Hi Skip
1206 should work fine I hope.
The pads are 2.54mm appart, so standard proto board, just no holes.

73.

thank you

john
 

Thank you for adding me.
john kd8paf

Reverse Polarity Protection

John McClun
 

This PDF file is from the the GQRP group and offers several reverse polarity protection circuits.  All are simple and low parts count.

Reverse Polarity Protection.

-- 
John
NQ3RP

Remote Encoder and Function Button #ubitx

El Calvo
 

Hi to all!!!

I'm would like to install my ubitx at the top of a mountain next to my house.  For this I used to Raspberry Pi's. The two way audio and ptt is done by Remotetrx from SM0SVX.  The serial comms for the Nextion is done by Ser2Net and socat, using the pi's own serial ports.

Frequency change can be done using the Nextion display but is a little difficult.  That is why I would like to add an Encoder and the function button. Also if possible the cw key.  

On my first setup, using this 2way audio setup and rigctld, I could control the radio using cat. But for some reason my USB cable when connected makes a lot of noise.  Besides using the rpi and nextion with a usb battery bank last for many hours.  

The question is how to add the encoder and buttons to this setup.  If possible without modifying the Nextion and ubitx code.  This way I can take advantage of future updates. 

All ideas are welcome!!!!

Thanks, WP3DN Juan Agrinsoni

Re: Remote Encoder and Function Button #ubitx

Tom, wb6b
 

Hi,

I control my uBITX with CAT from a RaspberryPi. To eliminate the noise I wrap the USB cable (as well as some others) several turns through a toroid core.
http://palomar-engineers.com/rfi-kits/miscellaneous-rfi-solutions/wall-wart-rfi-filter-kit/Wall-Wart-RFI-Noise-Filter-Pack-5-filters-p76744732

Don't know what the actual ferrite material type is, but probably is mix 75 or 77.

Also, I installed my RPi into a metal case.
https://www.amazon.com/gp/product/B0755S5J3G

There are libraries to control the GPIO ports on the RPi. There is at least one for Python and there is an interesting one that is similar to the Wire library for the Arduino. http://wiringpi.com

You could write code to output emulated quadrature encoder square waves and feed them to the Arduino from the Pi instead of the physical rotary encoder. That may be more than you are intending to do. But, if you are into software hacking it could be a solution.

Tom, wb6b

Re: VK4PP uBitx scratch built.

Dr. Flywheel
 

Great job Nick!

Very nice and handy concept for RF prototyping. Do you mind sharing the Gerber files and tell us where we could order such boards at a good price?

73's
--Ron    N7FTZ

On Wed, Oct 3, 2018 at 1:57 PM Nick VK4PP <nickpullen@...> wrote:
Hi Skip
1206 should work fine I hope.
The pads are 2.54mm appart, so standard proto board, just no holes.

73.