Date   
Re: ubitx circuit, wiring, source code on github

Gordon Gibby <ggibby@...>
 

​Jerry---wow, thanks!   very concise explanation.  Yes, since I had PLENTY of signal I was able to get it right near to zero beat with the ICOM 718 on 10 Mhz upper or lower.   There were tiny differences in the ICom whether  upper sideband or lower so I just roughly split the diffference.


For my particular purposes, if I'm within 50 Hz it is fabulous, if within 100 OK and if within200 Hz workable.   


But I was sweating bullets at first when I realized I had knocked it a kilter.   


I may disable some of those or provide confirmation steps in a sketch to avoid the debacle I got myself into.....


Gordon


From: BITX20@groups.io <BITX20@groups.io> on behalf of Jerry Gaffke via Groups.Io <jgaffke@...>
Sent: Sunday, December 31, 2017 9:54 PM
To: BITX20@groups.io
Subject: Re: [BITX20] ubitx circuit, wiring, source code on github
 
Gordon,

The factory calibration on the uBitx is probably fine.
It adjusts the 875mhz vco by 875hz each step, so 1ppm.
A wee bit coarse when operating at 30mhz,  but most of us won't really notice.
Your 10mhz factory calibration was scooting over by 10hz for each tick of the encoder.

    if (knob > 0)
      calibration += 875;
    else if (knob < 0)
      calibration -= 875;
    else 
      continue; //don't update the frequency or the display


The code under   menuSetupCalibration()   for us mere mortals has this:

  while (digitalRead(PTT) == HIGH && !btnDown())
  {
    knob = enc_read();

    if (knob > 0){
      calibration += 8750;
      usbCarrier += 120;
    }
    else if (knob < 0){
      calibration -= 8750;
      usbCarrier -= 120;
    }

So the 12mhz BFO is getting adjusted by 120 hz each step, and the 875mhz vco by 8750 hz each step.  
That's 10ppm, and for a 30mhz operating frequency that means you can only set the rig to the nearest 300 hz.

Not a big deal, just leave it calibrated as shipped.
Or use the factory calibration procedure.
Or calibrate it as you (Gordon) have on the Bitx40 by jamming a correct value for the 25mhz reference oscillator into the sketch.
But I think the "on the air" calibration scheme in the code as shipped is going to be too coarse for most of us.
Easy enough to fix with a new sketch.

Jerry, KE7ER


On Sun, Dec 31, 2017 at 05:55 pm, Gordon Gibby wrote:
Not sure what rig that applies to, when I did the factory calibration at 10 MHz, it moved pretty smoothly.

Re: Rugged Case Options? #ubitx

Kent Vanderploeg
 

Finished up my case today.  Drilled holes and mounted speaker and 3D printed a volume knob.  I may print a larger one for the VFO as well.  

Re: Rugged Case Options? #ubitx

Gordon Gibby <ggibby@...>
 

​Wow....all of you guys with the 3D abilities just run rings around me.    Congrats!!!!!


Gordon



From: BITX20@groups.io <BITX20@groups.io> on behalf of Kent Vanderploeg <kvanderploeg@...>
Sent: Sunday, December 31, 2017 10:26 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Rugged Case Options? #ubitx
 
Finished up my case today.  Drilled holes and mounted speaker and 3D printed a volume knob.  I may print a larger one for the VFO as well.  

Re: Tell me your favorite uBitx mods

Gordon Gibby <ggibby@...>
 

Hmmm....fairly ambitious goals, my friend!   


If you can put a TUNER in that space, you're a wizard.   


For my preferences, any simple vox-type soundcard interface would be nice.     Maybe a mic preamp also / mic gain control of some sort.  


And an AGC circuit...


Having some sort of a power-meter, SWR bridge would eliminate my need to add another one outside (I like watching that)


I think it would be very nice to have an input that could auto-detect if it is 12V or 19-28V and automatically provide 12V for the main board and the higher voltage to the finals.   


I don't know how hard it would be to put a thermo-sensor on the FETs, but that would be a nice addition.   


I'm thinking yet another board (larger) somewhere would be needed for a real tuner able to handle a wide range of impedances....


Of course, these are all "luxury items"



my 2 cents worth!!   


From: BITX20@groups.io <BITX20@groups.io> on behalf of Diver Martin <diver.martin@...>
Sent: Sunday, December 31, 2017 10:10 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods
 
My concept is to create a 6" x 5.5" PCB.  It would go on top of .5" standoffs on top of the uBitx main PCB.  One would remove the raduino, save the display, discard the nano/raduino (or better, use for a different project), and use the board as I'm creating it instead.  The idea is to create a clean, 2-PCB design, with a tuner, USB connectivity, built in connectors, etc.  It would replace some of the parts that come with the uBitx normally, make the case more compact, and remove the requirements to wire everything into an enclosure, allowing a clean 3D printed setup or however one would like.

On Sun, Dec 31, 2017 at 7:00 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
What do you mean by motherboard?
Are you replacing the uBitx main board, for which the Raduino could be called a daughterboard?
Or perhaps you mean the Raduino board, for which the Nano could be called a daughterboard?

On Sun, Dec 31, 2017 at 06:29 pm, Diver Martin wrote:
As I'm doing a motherboard mod, I'm looking to incorporate a bunch of mods into one PCB.




--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: Tell me your favorite uBitx mods

Terence Taylor
 

Sound card interface for digital modes, CAT interface.


On 12/31/2017 6:29 PM, Diver Martin wrote:
Hello all,

As I'm doing a motherboard mod, I'm looking to incorporate a bunch of mods into one PCB.  Right now, what I've got going are the following:

* A tuner + SWR Bridge (phase detector maybe?)
* A spot for an RTL-SDR (blogV3) dongle
* AGC Modifications
* Integrating LCD and headphone/mic/BNC/Power/etc jacks into the PCB

Other things I've thought about, space depending:

*Adding in footprints for a chinese AD9850 DDS module for one of the clock signals

I would like to hear the top mods you've done, and what you'd love to see integrated into a motherboard PCB that fits on top of the uBitx.  Battery charger?  Battery adapter? I dunno, bring it on!  If you have a favorite AGC mod, please tell me about it, and make some suggestions as well.  This is not promising to be a cheap kit, and full of SMT, but something I might make available.

Happy new year,

--
Martin Held - AE7EU


Re: Rugged Case Options? #ubitx

 

Neat work, nice drilling!

Raj


At 01-01-2018, you wrote:
Finished up my case today.  Drilled holes and mounted speaker and 3D printed a volume knob.  I may print a larger one for the VFO as well. 

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Re: Tell me your favorite uBitx mods

Diver Martin <diver.martin@...>
 

My current tuner PCB that I use on the 50W amplifier is 2" wide and 4.5" long, 2 sided, 7-inductor, 8-capacitor, including the arduino (leonardo) control circuity (caveat: I have a few components on the backside of the PCB... I aim for single side component on this).  But it should all fit.  The SWR Bridge is on a separate PCB, but consumes all of maybe 1" x 1" with the two FT43-37's, a few diodes, etc.

6" x 5.5" is a heck of a lot of real estate.  When doing AGC, I will have to see what I can do to get an analog signal back to the arduino to create an S-meter reading. 

CAT interface is easy, I'm pulling the USB connector to the edge.  That's a matter of programming, and to my knowledge, is the main limiting factor for most people wanting to do CAT control.  Unsure by soundcard interface, other than adding isolation transformers?  Can you not hook up the audio lines/etc to a computer right now as it is?

Fitting it all isn't an issue.  Fitting it all in cleanly and making good use of the front and back panel space is the hard part, and that's what I haven't decided on yet, is how to do the BNC/etc connectors so that it could easily fit into a case with no protrusions, since some things just take up a lot of real estate (display, the connectors down to the uBitx, the heatsinks for the PA, etc)

On Sun, Dec 31, 2017 at 7:33 PM, Gordon Gibby <ggibby@...> wrote:

Hmmm....fairly ambitious goals, my friend!   


If you can put a TUNER in that space, you're a wizard.   


For my preferences, any simple vox-type soundcard interface would be nice.     Maybe a mic preamp also / mic gain control of some sort.  


And an AGC circuit...


Having some sort of a power-meter, SWR bridge would eliminate my need to add another one outside (I like watching that)


I think it would be very nice to have an input that could auto-detect if it is 12V or 19-28V and automatically provide 12V for the main board and the higher voltage to the finals.   


I don't know how hard it would be to put a thermo-sensor on the FETs, but that would be a nice addition.   


I'm thinking yet another board (larger) somewhere would be needed for a real tuner able to handle a wide range of impedances....


Of course, these are all "luxury items"



my 2 cents worth!!   


From: BITX20@groups.io <BITX20@groups.io> on behalf of Diver Martin <diver.martin@...>
Sent: Sunday, December 31, 2017 10:10 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods
 
My concept is to create a 6" x 5.5" PCB.  It would go on top of .5" standoffs on top of the uBitx main PCB.  One would remove the raduino, save the display, discard the nano/raduino (or better, use for a different project), and use the board as I'm creating it instead.  The idea is to create a clean, 2-PCB design, with a tuner, USB connectivity, built in connectors, etc.  It would replace some of the parts that come with the uBitx normally, make the case more compact, and remove the requirements to wire everything into an enclosure, allowing a clean 3D printed setup or however one would like.

On Sun, Dec 31, 2017 at 7:00 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
What do you mean by motherboard?
Are you replacing the uBitx main board, for which the Raduino could be called a daughterboard?
Or perhaps you mean the Raduino board, for which the Nano could be called a daughterboard?

On Sun, Dec 31, 2017 at 06:29 pm, Diver Martin wrote:
As I'm doing a motherboard mod, I'm looking to incorporate a bunch of mods into one PCB.




--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?




--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: elves are at it

Jack, W8TEE
 

Loved looking at your old gear on QRZ. I saw the Galaxy V; just sold my old GT-550:

Inline image

Big mistake...

Jack, W8TEE



From: Dave Bottom <ars.kd6az@...>
To: BITX20@groups.io
Sent: Sunday, December 31, 2017 6:58 PM
Subject: Re: [BITX20] elves are at it

QRZ has changed their link policy so you’ll have to type in my call sign for now.

Dave WI6R

On Dec 31, 2017, at 3:55 PM, Dave Bottom <ars.kd6az@...> wrote:

Happy New Year to all.

Received mine on the 24th (lucky I ordered on the 10th).

Got my case yesterday late afternoon and finished the case prep before turning in.

Wired up this morning. It’s alive!!!
First contact 600 Miles - 59 report.

See top of my QRZ page for pictures.

Off to build a Mic pre-amp with Mic Gain control. Then work on paddle interface.

Dave WI6R

Sent from my iPhone

On Dec 31, 2017, at 3:36 PM, Tom Christian <tmchristian@...> wrote:

Same here 12/23 date. Pretty excited!  Thank you, Farhan!
Tom
AB7WT


Wiring volume control

ekelley
 

The schematic shows the yellow wire going to the wiper arm, but in the instructions
later on the orange wire goes to the wiper. Which is correct?
Ed

Re: Rugged Case Options? #ubitx

Bob McMillan
 

Wow beautiful box really nice work. Where did u find the box? Box size etc if you don’t mind
Bob
W5RKM

Re: Wiring volume control

Jerry Gaffke
 

You found a bug in the schematic at the top of the wireup instructions where orange and yellow wires are swapped.
Should be the orange wire to the wiper arm, as shown in the photo of the volume pot down in the instructions.
Also, should have the green wire on the correct end of the pot as shown in the photo
so fully counter-clockwise is minimum volume.
 

On Sun, Dec 31, 2017 at 08:28 pm, ekelley wrote:
The schematic shows the yellow wire going to the wiper arm, but in the instructions
later on the orange wire goes to the wiper. Which is correct?

Re: Tell me your favorite uBitx mods

John McFadden
 

A relay to select the board's power source (12 or 13.5v) or an alternate power input (24v or a variable input) as the feed to the finals, potentially with the system reading the voltages and the software calculating the approximate power. 

The user could then switch between two power levels with software, accommodating low power antennas like magnetic loops which have restrictions such as 10W CW and 25W SSB.

John

On Dec 31, 2017 10:10 PM, "Diver Martin" <diver.martin@...> wrote:
My concept is to create a 6" x 5.5" PCB.  It would go on top of .5" standoffs on top of the uBitx main PCB.  One would remove the raduino, save the display, discard the nano/raduino (or better, use for a different project), and use the board as I'm creating it instead.  The idea is to create a clean, 2-PCB design, with a tuner, USB connectivity, built in connectors, etc.  It would replace some of the parts that come with the uBitx normally, make the case more compact, and remove the requirements to wire everything into an enclosure, allowing a clean 3D printed setup or however one would like.

On Sun, Dec 31, 2017 at 7:00 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
What do you mean by motherboard?
Are you replacing the uBitx main board, for which the Raduino could be called a daughterboard?
Or perhaps you mean the Raduino board, for which the Nano could be called a daughterboard?

On Sun, Dec 31, 2017 at 06:29 pm, Diver Martin wrote:
As I'm doing a motherboard mod, I'm looking to incorporate a bunch of mods into one PCB.




--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: Wiring volume control

Jerry Gaffke
 

To be a bit more concise, the schematic at the top of the wireup page does correctly show the 
the yellow wire coming out of pin 4 of the uBitx main board, and the orange wire out of pin 5.

However pin 4 should be labeled "VOL_HI", and be wired to the hot side of the pot,
and pin 5 should be labeled "VOL_MID" and be wired to the wiper of the pot.



On Sun, Dec 31, 2017 at 08:59 pm, Jerry Gaffke wrote:
You found a bug in the schematic at the top of the wireup instructions where orange and yellow wires are swapped.

C;hanging frequencies on the Raduino

Dale Brooks KG7SSB <kg7ssb@...>
 

Hi Guys, could someone tell me what I would have to do to change my VFO frequency from the normal 4.7-5.0 mhz to 19.0-19.3 mhz. on my bitx40 rig. I'm using Allards ver 1.27.2 at this time but I would like to go on the high side of my IF to rid it of a nasty birdie at 7.2mhz. I remember back many weeks ago there was a bunch of threads having to do with this issue so if it already exists please help me locate the info. I'm still trying to learn the digital side of this thing so I'm not real good at processor mods. Thanks for the help:::Dale 

Re: Wiring volume control

ekelley
 

Thanks, Jerry

On 12/31/2017 10:59 PM, Jerry Gaffke via Groups.Io wrote:
You found a bug in the schematic at the top of the wireup instructions where orange and yellow wires are swapped.
Should be the orange wire to the wiper arm, as shown in the photo of the volume pot down in the instructions.
Also, should have the green wire on the correct end of the pot as shown in the photo
so fully counter-clockwise is minimum volume.
 
On Sun, Dec 31, 2017 at 08:28 pm, ekelley wrote:
The schematic shows the yellow wire going to the wiper arm, but in the instructions
later on the orange wire goes to the wiper. Which is correct?

Re: C;hanging frequencies on the Raduino

Jerry Gaffke
 

Hi side VFO while operating in lower-sideband mode on the Bitx40 requires lowering the BFO frequency a few khz.
So you need version 2 of Allards firmware plus the associated hardware mods, one of which drives the BFO
from the si5351's clk0.    https://github.com/amunters/bitx40-raduino-v2


On Sun, Dec 31, 2017 at 09:36 pm, Dale Brooks KG7SSB wrote:
Hi Guys, could someone tell me what I would have to do to change my VFO frequency from the normal 4.7-5.0 mhz to 19.0-19.3 mhz. on my bitx40 rig. I'm using Allards ver 1.27.2 at this time but I would like to go on the high side of my IF to rid it of a nasty birdie at 7.2mhz. I remember back many weeks ago there was a bunch of threads having to do with this issue so if it already exists please help me locate the info. I'm still trying to learn the digital side of this thing so I'm not real good at processor mods. Thanks for the help:::Dale 

Another opportunity to show my ignorance... Tuning control?

Nigel
 

First up is to wish everyone on this group the very best for 2018!

Next is to also confirm that have received the mass mailing re order acknowledged and now waiting patiently (order placed December 16th).

Now for a question that should be easy to find answer but not yet found so hence this post (and good possibility of again showing my ignorance): I recall (sort of - not 100% certain) that during a video explaining operation of the uBitx that action and verbal description of how tuning implemented shows the control (variable resistor?) being moved to either end of travel (implying a conventional 270 deg movement) and then triggering 'fast tune' (even faster if function button active) and yet when looking at the 'code' there is reference to encoder detection (speed and direction)... 

Relevance for wanting to know if tuning action is 'rotary no limit' or 'conventional' (270 deg or perhaps 10T pot) ahead of receiving uBitx is that have an opportunity during upcoming visit to U.K. to obtain suitable knob (with finger depression) as sourcing locally very difficult + expensive.
 
As an aside the unreliable postal service here is another reason to only use courier services when importing ANYTHING. I digress... now stepping off soap box and looking forward to learning more via this forum. 

Many thanks in advance.

Remember to KEEPSMILING and have FUN!

Best regards to all

Nigel

ZS6RN ex G8DEV 

Re: Another opportunity to show my ignorance... Tuning control?

William R Maxwell
 

That certainly applied to the Raduino used on BITX40 Nigel but the uBITX, which uses a rotary encoder rather than a variable resistor.

Bill, VK7MX

On 1/01/2018 5:52 PM, Nigel wrote:
First up is to wish everyone on this group the very best for 2018!
Next is to also confirm that have received the mass mailing re order acknowledged and now waiting patiently (order placed December 16th).
Now for a question that should be easy to find answer but not yet found so hence this post (and good possibility of again showing my ignorance): I recall (sort of - not 100% certain) that during a video explaining operation of the uBitx that action and verbal description of how tuning implemented shows the control (variable resistor?) being moved to either end of travel (implying a conventional 270 deg movement) and then triggering 'fast tune' (even faster if function button active) and yet when looking at the 'code' there is reference to encoder detection (speed and direction)...
Relevance for wanting to know if tuning action is 'rotary no limit' or 'conventional' (270 deg or perhaps 10T pot) ahead of receiving uBitx is that have an opportunity during upcoming visit to U.K. to obtain suitable knob (with finger depression) as sourcing locally very difficult + expensive.
As an aside the unreliable postal service here is another reason to only use courier services when importing ANYTHING. I digress... now stepping off soap box and looking forward to learning more via this forum.
Many thanks in advance.
Remember to KEEPSMILING and have FUN!
Best regards to all
Nigel
ZS6RN ex G8DEV

Re: Another opportunity to show my ignorance... Tuning control?

Jerry Gaffke
 

The uBitx uses an encoder, so rotary, no limit.
The Bitx40 uses a pot for tuning with 270 degree rotation, that's likely the video you remember.


On Sun, Dec 31, 2017 at 10:52 pm, Nigel wrote:
I recall (sort of - not 100% certain) that during a video explaining operation of the uBitx that action and verbal description of how tuning implemented shows the control (variable resistor?) being moved to either end of travel (implying a conventional 270 deg movement) and then triggering 'fast tune' (even faster if function button active) and yet when looking at the 'code' there is reference to encoder detection (speed and direction)... 

Re: Another opportunity to show my ignorance... Tuning control?

AndyH
 

Farhan used the same sort of one-turn variable resistor tuning on his prototype µBITX that he used on the BITX with Raduino (and on his Sweeperino), so you probably did see his µBITX video.
https://www.youtube.com/watch?v=j-yLof4sTtE

The production µBITX uses a rotary encoder - so we're free to 'spin and grin'. :)  

Happy New Year, Nigel!

Andy
KG5RKP


On Sun, Dec 31, 2017 at 10:52 pm, Nigel wrote:
First up is to wish everyone on this group the very best for 2018!

Next is to also confirm that have received the mass mailing re order acknowledged and now waiting patiently (order placed December 16th).

Now for a question that should be easy to find answer but not yet found so hence this post (and good possibility of again showing my ignorance): I recall (sort of - not 100% certain) that during a video explaining operation of the uBitx that action and verbal description of how tuning implemented shows the control (variable resistor?) being moved to either end of travel (implying a conventional 270 deg movement) and then triggering 'fast tune' (even faster if function button active) and yet when looking at the 'code' there is reference to encoder detection (speed and direction)... 

Relevance for wanting to know if tuning action is 'rotary no limit' or 'conventional' (270 deg or perhaps 10T pot) ahead of receiving uBitx is that have an opportunity during upcoming visit to U.K. to obtain suitable knob (with finger depression) as sourcing locally very difficult + expensive.
 
As an aside the unreliable postal service here is another reason to only use courier services when importing ANYTHING. I digress... now stepping off soap box and looking forward to learning more via this forum. 

Many thanks in advance.

Remember to KEEPSMILING and have FUN!

Best regards to all

Nigel

ZS6RN ex G8DEV