Date   
Re: BITX QSO Afternoon/Evening, Sunday, May 20, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

Daniel Conklin
 

Had a complete exchange With Jake, KE0GYC despite the static crashes.  It's definitely a very noisy night.
Dan, W2DLC

Ubitx with the Raspberry pi and WSJT-x #ubitx

Bo Barry <bobarr@...>
 

Raspberry pi and ubitx FT8 setup   Bo Barry 5/20/18 first draft
 
NOTE: 
The AGC and pop mods are not needed for digital mode. You operate with AGC
off and adjust the audio signal level with the volume control.
 
The pop isn't noted if you don't have headphones on! :)
 
USB sound cards don't like the DC on the mic input. Use a 1uf cap.
 
Remove the orange wire (the PTT line on the mic jack. 
The sound card puts audio on it! PTT is not needed for digital)
 
Enter aplay -l to see if the USB card is device 1 If not, the following is not helpful. :)
 
If so edit or create the ~/.asoundrc file to look like this.
Note: ~/ means it goes your home directory and the . indicates it is a hidden file.
 
pcm.!default {
        type hw
        card 1
}
 
ctl.!default {
        type hw
        card 1
}
 
A reboot is needed for this to take effect.
 
To get sufficient volume out from the USB sound card I had to install the pimixer program: sudo apt-get install pimixer
Set it up and move the sliders to maximum.
 
After this I had a clean input signal to the ubitx and the RF output looked good on a scope.
 
Badly needed is a meter/indication of the audio input level to the mic. 
 
I'm using one of the USB sound cards that has a button and volume control on it.
Be sure to tap the button to turn on its audio output!!!
 
Be sure to power on the ubitx and connect the USB cable to the ubitx, plus the USB sound card, BEFORE power on the Raspberry pi
 
Set the rig to Yaesu 817, 38400 baud, 8 data bits, 2 stop bits  no handshake, 
CAT Control to /dev/tty/USB0, PTT mode to CAT, USB mode (important), & None
 
When you select your sound source in WSJT-X, you simply pick the default option. No worry with all the options.
Check the audio ports. They should be sysdefaultCARD=Device
 
You can get the WSJT-X program for the Raspberry pi at https://physics.princeton.edu/pulsar/k1jt/wsjtx.html
 
Let me know if you find this helpful!!   Bo W4GHV
 

Success with my Raspberry pi on FT8 & WSPR #ubitx

Bo Barry <bobarr@...>
 

I got it going on FT8 and made some great contacts on 40 FT8, about 7 watts out Then the audio went away and it took a day to figure it out.
See my 'tutorial' for info.
Then I tried WSPR on 20. With about 4 watts here is a map of the results in a short time, Simple EFHW antenna, no tuner.

audio dropping out

docame12@...
 

Ok, something new. I think I may need to replace one, or both of the wiring harness to the raduino and the board. I get audio spontaneously dropping out. If I just touch these wires it comes back. It's like a capacitance issue. Just lightly touching the yellow or orange or both wires brings the audio back. Makes me crazy when I try to copy a station. Any ideas?

Thanks!

Re: Fixed AF out.

victorladeira@...
 

  Well I've been using it on FT8 without AGC so what I'd like is a way to wire in a fixed AF. But I'm not sure if I need a separate drive chip or if the ubitx has what I need already. Need someone who is bit more savy then me to draw up something  that I can use. Right now I have in plugged in to the head phone jack and about half volume works well for incoming signals but would like to listen too. Thanks again!

Re: audio dropping out

n5ib_2
 

Check the metal spring-sockets that are inserted into the plastic housing of the wiring harness. I found on mine that the little tab that is supposed to keep the metal contact from backing out did not engage the slot in the plastic housing. When the connector was plugged onto the header, the socket got pushed backwards and made poor or intermittent contact.

I pulled the socket out of the housing, bent the tab slightly and re-inserted it. It held solidly after that.

N5IB

Re: Volume potentiometer

marjannorm
 

Hi Patrick,  yes, that is what We (me vk5gi and Greg vk5gj)  have done, and put a fan in as well.    Fan driven by a 7 volt regulator to keep the noise down!
norm vk5gi
McLaren Vale
South Australia

Arduino Nano dds

VE7CWS WRSeiler <waltrseiler@...>
 

Hello folks
Could someone please help me as to where I can find the software / sketch for the Arduino Nano that was being sold by the bitx40 folks prior to the ubitx era.
I have searched high and low and for the life of me I can’t seem to find it.

I would like to use it in a project to replace crystals in an older hf rig

thanks
WRS VE7CWS

Re: Arduino Nano dds

D. Daniel McGlothin KB3MUN
 

WRS,

Perhaps here:  https://github.com/afarhan/bitx40

Daniel KB3MUN


On 5/20/2018 22:28, VE7CWS WRSeiler wrote:
Hello folks
Could someone please help me as to where I can find the software / sketch for the Arduino Nano that was being sold by the bitx40 folks prior to the ubitx era.
I have searched high and low and for the life of me I can’t seem to find it.

I would like to use it in a project to replace crystals in an older hf rig

thanks
WRS VE7CWS
_._,_._,_

Re: pin 2 of raduino board seems to have gone to CW TX full time after boot message.

Jerry Gaffke
 

Could be a reason that some Nano's are $2.50 and some are $3.00.
I'd hate to think of all the corners that would have to be cut to hit those prices.
Maybe $5 from a mainstream vendor would be a good investment here.



On Sun, May 20, 2018 at 03:11 pm, ajparent1/KB1GMX wrote:
Not likely as pins 1,2,3  of the connector didn't even have a wire inserted.  I  popped the pins out
rather than have flying leads.  

That and I was on the dummy load and not transmitting.

The only way to know is uncap the die and look at the chip under a really good microscope.
I'm not going to waste further time on that.

It looks typical of ESD from manufacture or handling and could have occured anywhere from 
the the Nano build or after that.  I've worked around it.  I do not need CW right now.

Allison

Re: Transmitter Mods

Howard Fidel
 

Fro the inductor:
445-1064-1-ND
For the capacitor:

1576-1288-1.ND

Of course, my offer is still good, just send me the envelope if you like.

Howard

Quoting M Garza <mgarza896@...>:

Doug,
Here is the part number I ordered from Digikey:
732-10802-1-ND.

Hope it helps,

Marco - KG5PRT

On Sun, May 20, 2018, 9:03 AM Doug W <dougwilner@...> wrote:

I'm almost embarrassed to ask for help on this but I wasn't born knowing
how to do much. I don't do much with SMT passives and the choices are
starting to look endless. I'm in the middle of a digikey order for another
project and was planning to order the inductor and capacitors for Howard's
mod while I am at it. Can somebody steer me in the right direction?
Normally I like to sort through the billions of choices but my gut keeps
telling me I am going to order the wrong thing.

Also, Howard your offer to share parts is very generous and if I didn't
have other parts I needed to order I would be taking you up on it.
--
www.bitxmap.com

Re: BITX QSO Afternoon/Evening, Sunday, May 20, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

KE0GYC
 

W2DLC was my first QSO with the uBITX - Finally got the drive issues sorted out and got everything boxed up!  Glad I had a good maiden voyage!

Re: Arduino Nano dds

D. Daniel McGlothin KB3MUN
 

WRS,

You may also wish to consider this fork of the original project: https://github.com/amunters/bitx40

Daniel KB3MUN


On 5/20/2018 22:33, D. Daniel McGlothin KB3MUN wrote:
WRS,

Perhaps here:  https://github.com/afarhan/bitx40

Daniel KB3MUN


On 5/20/2018 22:28, VE7CWS WRSeiler wrote:
Hello folks
Could someone please help me as to where I can find the software / sketch for the Arduino Nano that was being sold by the bitx40 folks prior to the ubitx era.
I have searched high and low and for the life of me I can’t seem to find it.

I would like to use it in a project to replace crystals in an older hf rig

thanks
WRS VE7CWS

Re: audio dropping out

 

The connector pins are not making contact OR the crimp of one of the wires is bad!

Raj

At 21-05-18, you wrote:
Ok, something new. I think I may need to replace one, or both of the wiring harness to the raduino and the board. I get audio spontaneously dropping out. If I just touch these wires it comes back. It's like a capacitance issue. Just lightly touching the yellow or orange or both wires brings the audio back. Makes me crazy when I try to copy a station. Any ideas?

Thanks!

Re: Fixed AF out.

 

You could simply put two jacks, one for speaker and one for data - wire them is parallel OR
just solder an internal speaker in parallel. You will hear the audio.

Raj

At 21-05-18, you wrote:
Well I've been using it on FT8 without AGC so what I'd like is a way to wire in a fixed AF. But I'm not sure if I need a separate drive chip or if the ubitx has what I need already. Need someone who is bit more savy then me to draw up something that I can use. Right now I have in plugged in to the head phone jack and about half volume works well for incoming signals but would like to listen too. Thanks again!

Cobra microphone help

حمد المزين <hamad.kalid@...>
 

Hello everyone i have problem with wiring my microphone jack ( 4pin) 

This is my microphone wiring diagram
I hope to help me to wire it.

Re: Fixed AF out.

Mike
 

Connect an audio jack to VOL-H. A convenient place to do this is right at the volume pot.

JackAl Board Debut

Jack, W8TEE
 

All:

The FDIM conference was a good time and the trip to nearby Xenia for the Hamvention was also great. The rain didn't help, but it was better than last year, and I'm sure it will be even better next year.

Friday night was a sort of Show-and-Tell at FDIM and we used that opportunity to show our JackAl board in action. This photo shows a little more about what it is and does:

Inline image

At the show, Al hooked up a noise generator to the µBITX to show how the filters work. (There are 4 preset filters for CW and 4 for SSB.) In addition, you can customize one CW and SSB filter to the bandwidth you desire. You might be able to see that the skirts are pretty steep for the filters on the scope in the background. The setting of the CW custom skirts are set differently, in that you pick a center frequency (e.g., 700Hz in the shot below), press the encoder, and then you see this:

Inline image

In this case, turning the encoder CCW increases the bandspread (i.e., the 440 red number above, although it looks orange in the photo) by simultaneously moving the skirts (480Hz and 920Hz) further apart. If you turn the encoder CW, you narrow the bandspread. Most CW users will probably center the bandpass on their favorite sidetone frequency, which centers the bandpass on that frequency.

The demo used a 5" display, although a 7" display is also available. The third knob on the front is for a second encoder that we use for everything from setting the CW keyer speed to adjusting the filter skirts. You can see some of the plots on the panel at the rear of the picture above for some of the board's features (e.g., filter responses, compression, etc.) Those will be included in the documentation when the (downloadable) manual is finished.

The JackAl board has the following features:

    5" or 7” touch screen 800x480 TFT color display
    Dual VFO's
    RIT
    S meter
    RTC
    CW keyer, 5 to 50wpm (we could go up to 100wpm, but...really?)
    Up to 50 CW preset messages, selectable at runtime...perfect for contest messages
    Touch screen function and control selection (e.g., band changes, RIT, mode, VFO, VFO increment, LSB/USB, etc.)
    Automatic LSB/USB selection based on frequency (overrideable)
    One touch frequency increment changes (1Hz to 1MHz in multiples of 10...the white underscore in the frequency window)
    Dual encoders (frequency, features)
    EEPROM storage of user preferences (one-click reset to "factory" defaults)
    Uses Teensy 3.6 processor (1Mb flash @180MHz) and companion audio board
    Support for 3 external CW push button switches (NO) for sending stored CW messages (e.g., contesting)
    Hardware AGC using IF take-off
    Audio AGC with adjustable threshold
    Mic compressor with adjustable threshold
    8 band audio equalizer
    Receive audio filter:
        48dB/octave (8 pole equivalent DSP filters)
        4 CW presets (150, 300, 400, 600, [or none] Hz 3dB bandwidth) + 1 user-defined knee frequencies (at runtime!) filter
        4 SSB presets (1500, 1800, 2200, 3000, [or none] Hz 3dB bandwidth) + 1 user-defined knee frequencies (at runtime!) filter
        Variable Notch filter, encoder adjustable, use specified Q
    7 watt power amplifier

The board will be distributed with all (surface mounted) parts in place. The user must supply the Teensy 3.6 ($30), its supporting audio board ($15), and the 5" ($34) or 7" ($44) touch screen displaying (using the RA8875 controller chip, BuyDisplay.com). We expect the JackAl board to sell for $50. We may need to adjust this price as we have only received "ballpark" cost estimates for the board since we only have the Gerber files for the Beta board. Currently, we are using less than 20% of the available flash memory (out of 1Mb) and less than 15% of the SRAM (256K), so there is plenty of memory resources available for adding "stuff". The board also brings out a number of I/O pins to help your experimentation. With the exception of removing one SMD resistor on the µBITX board and soldering two wires to those pads, all interconnections are via existing connectors.

Our best guess is that after finishing the modified Gerber files, production, Beta testing, and writing support manuals, it will be probably two months before we begin distribution. We will announce its availability here as soon as we can. BTW, if anyone knows a high-quality PCB manufacturer who also does pick-and-place at reasonable prices, we are getting quotes and would like to know about them.

Jack Purdum, W8TEE
Al Peter, AC8GY


Re: Arduino Nano dds

Ralph Mowery
 

You may want to look into this for the crystal replacement.  It uses an arduino and can or can not be built to lock on to the GPS system.


73 de ku4pt


On Sun, May 20, 2018 at 10:28 PM, VE7CWS WRSeiler <waltrseiler@...> wrote:
Hello folks
Could someone please help me as to where I can find the software / sketch for the Arduino Nano that was being sold by the bitx40 folks prior to the ubitx era.
I have searched high and low and for the life of me I can’t seem to find it.

I would like to use it in a project to replace crystals in an older hf rig

thanks
WRS VE7CWS
_._


Re: Cobra microphone help

John (vk2eta)
 

Hello Hamad (if the google translator is correct),

I would connect it the following way:

Mic shield and mic Red to Blue wire from the main board
Mic White to Violet wire from main board
Mic Blue wire to Orange wire from Raduino

All the best,

73, John (VK2ETA)