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Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

Evan Hand
 

When I first powered up and set my v5 with stock firmware, it would go into TX mode as soon as you selected calibration with an encoder press.  You then adjust the encoder to have the correct frequency on the counter.  then press the PTT, then power cycle the full rig including the Raduino (in another words disconnect the USB port if connected).

If the PTT does not work, then try it by pressing the encoder.

Again, it should go into transmit after you set it in the calibration mode with the second calibration selection.  The first time it puts the rig into calibration mode for both the BFO and frequency.  So you first set it in calibration mode, then go back and scroll past the exit menu selection to the calibrate mode, just before the SET BFO.  I do not have the v5 software anymore, so I cannot duplicate the exact button pushes.  If you press the PTT too soon it will not make any changes.

I hope that helps.
73
Evan
AC9TU


Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

baltimari@...
 

Evan

 Are you saying that once enter Calibration mode that it goes into TX and I should be reading something on the frequency counter at this point without hitting PTT on microphone.


Re: Funtronics uBitx digi interface installation in V6

George Griesbach
 

Glen
I am working on a v5 with the funtronics digital board add-on. I have obtained a 12vdc to 5vdc power supply from ebay
real cheap.. I think that is a better option than tying to find 5vdc on the ubitx board.
Much safer in my opinion
George W5GRG


Re: Funtronics uBitx digi interface installation in V6

N0YWB
 

The uBitx V6 kit should have included an extra 8-pin header with wires installed.  This plugs into the Audio1 header on the uBitx V6 main board, and can be wired to the Digi board as shown in the attached photo.  Note how the audio rx and tx wires are twisted together with their respective ground leads to help shield them from RF inside the enclosure.  There is no need for a connection to the 5V pad on the Digi board -it gets 5 Volt power from the USB connection to the PC.  PTT (Push To Talk) transmit control is provided by CAT (Computer Assisted Transceiver) command via USB from the Digi board to the Arduino.  The stock Auduino controller uses Yaesu FT817 CAT commands.  If you replaced the Atduino with the Teensy 4 controller, FT-991 CAT commands are used.  


Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

baltimari@...
 

Thanks for the tip but I have no means ti inject a 1000hz signal in to the the microphone and I don't know how to access Memory manager.


SolderSmoke Podcast 221 -- Mention of the BITX rigs, and homebrewing of Simple SSB

Bill Meara
 


Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

F5NPV
 

Hello,

I am using an Oscilloscope as the frenquency counter.

  1. 1 (one) Well calibrated transmitter an injecting 1000hz in the AF circuit (Microphone) USB and LSB modes. You can use also JTDX or FLDIGI in tune mode since they are injecting 1000hz audio tone.
  2. The UBITX on a dummy load on the tranmitter frequency with the Oscilloscope on the AF RX circuit.
  3. Open the Memory manager and move the setup (Master and BFO) upon you find exactly 1000hz on the UBITX.
73s F5NPV


Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

baltimari@...
 

Evan 
Your assumption is correct I have the stock firmware. The very first time I powered the it up it did  TX automatically. Now when I power up for me to get into Calibration Mode I have to Press the encoder and select Calibration so I have been adjusting for 10MHz then press the encoder and Message comes up saying calibration set. When I go back into calibration mode it still has the old setting. What am I doing wrong.


Re: UBITx V4 Low audio output 80-40-20 #audiocircuit

Richard West <rewest71@...>
 

Hi Ted,

Was not trying to over-think things, was just looking to be clear. Thank you for the information you provided, it's appreciated. 

73,

Wes
KH2EE


Re: Funtronics uBitx digi interface installation in V6

Evan Hand
 

There are two 8 pin connectors, one on the mainboard and one on the Raduino (the board with the Nano).  You need to get the 5volts from the Raduino 8 pin connector.  That is the same connector that the tuning encoder uses.

73
Evan
AC9TU


Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

Evan Hand
 

What firmware is in the v5 uBITX?  The stock firmware goes into TX automatically when you enter the calibration adjustment.  It stops when you press the PTT.

If you are using the KD8CEC firmware, then you need to use another method to calibrate based on the transmitted signal.  There you take the current offset and the error value to calculate a new error offset.  If you are using the KD8CEC firmware, then use the Memory Manager software to adjust each interaction, saving the values to files until you are happy with the result.  For that you do not even need to go into the calibration mode, just connect up the Memory Manager.

I had been assuming that you were using the stock v5 firmware that goes into transmit mode automatically.  The CEC firmware would not work with entering the values after reading the transmit signal.  That was why I used WWV as the calibration process.  That firmware is similar to the way that all but the v5 stock firmware works: go into calibration mode with the display at the frequency of the expected received signal, and then adjust for zero beat while in calibration mode, finally pressing the ptt to lock in the value.

I hope the above is clear.  If not, then post more questions.
73
Evan
AC9TU


Re: Can't Swap Back to Stock Firmware #v6 #firmware

Reed N
 

Thanks! Hopefully that process will go smoothly too.


Reed


Nextion 3.2" Display

Dale Parfitt
 

Is there a preferred source for the 3.2” display and micro SD card?

 

Tnx,

 

Dale W4OP

 


Re: Funtronics uBitx digi interface installation in V6

Glen Dingley
 

On the drawing in the video it shows the Raduino Pin #3 as +5vdc, but the main schematic it shows Raduino01 Jack#3 as blank and Jack#4 as +12vdc (no +5v on the Raduino01 jack). Do you know where I can pick up the +5vdc needed for the digi interface?

 

https://www.hfsignals.com/wp-content/uploads/2019/12/ubitxv6.pdf

 

https://www.youtube.com/watch?v=YjelKUDv_7I

 

Glen Dingley, W5GMD

 




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Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

baltimari@...
 

Evan thanks for responding

 

Let see if I understand the procedure. I go into calibration mode, at this point the frequency counter is not reading anything. Now if I  press the PTT switch, the frequency counter reads 10002002MHz. I make the adjustment to 10MHz. Then Release the PTT switch and press the PTT switch again? Then can I just power cycle the entire radio?

 

Bob

KA3VWT


Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

Evan Hand
 

Bob,
The values are stored when you press the putt switch. You then need to power cycle the radio/Nano (unplug the Nano from any attached USB connection). It should then save the new setting. 


Secret is to power cycle the Nano. 


73
Evan
AC9TU


Re: Can't Swap Back to Stock Firmware #v6 #firmware

Zac T
 

Me too Reed.

Also I eventually swapped back to your firmware.  I really like how it is laid out on the main screen. 


Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

Gordon Gibby
 

The easiest thing is to simply measure the actual frequency put out by the crystal, and then adjust the software to expect that frequency.   

In most of Ashers code you can find the presumed crystal frequency stored as a constant.

I put out here once a simple Arduino sketch that drove the oscillator  to exactly it’s crystal frequency, so then measure it with your lab grade frequency counter and then adjust the constant in the software, recompile, upload, and you have an absolutely perfect radio.   In my case, I simply used a good ICOM 718 to measure that frequency by dialing it in with the icom 718, and then I inserted the correct crystal frequency into the code.  Perfect!

(However you may then need to adjust slightly he any offsets for BFO etc.) 

This is how I have set up any that I have worked on.


On Apr 25, 2020, at 08:02, baltimari via groups.io <baltimari@...> wrote:



 

The frequency counter is a lab grade frequency counter and gets calibrated once a year by Tektronix. It has a 10X attenuation probe.

 I have a dummy load on the antenna connector and I put the frequency counter probe on the antenna connector and I am measuring 10002002 MHz. I can adjust it to 10000000 MHz and when I push the encoder in to save the new setting it says calibration set. But when I go back into the calibration mode and check it did not save the new vale. Can someone tell me what I am doing wrong?

Bob KA3VWT


Re: Has anyone Calibrated the uBITx v5 with a frequency counter?

baltimari@...
 

 

The frequency counter is a lab grade frequency counter and gets calibrated once a year by Tektronix. It has a 10X attenuation probe.

 I have a dummy load on the antenna connector and I put the frequency counter probe on the antenna connector and I am measuring 10002002 MHz. I can adjust it to 10000000 MHz and when I push the encoder in to save the new setting it says calibration set. But when I go back into the calibration mode and check it did not save the new vale. Can someone tell me what I am doing wrong?

Bob KA3VWT


Re: Nextion 4.3" Firmware?

Evan Hand
 

Steve,
Glad it was a simple fix.

The firmware will not allow you to change the TX frequency while transmitting.  The reason it is in transmit mode is the pull-up resistor is missing on the digital input for the CW key.  That is the reason for the warnings to ensure that the resistor is installed before powering the mainboard with the Raduino connected.  It can go into TX mode.

The display looks good!

73
Evan
AC9TU