Date   

Bitx-40 net? #bitx40

Robert D. Bowers
 

I've been trying off and on for over a year to make a contact with my "new" bitx40, and the closest I came was today... I tried to jump in on field day (I'd forgotten about it until nearly 2 today) and the guy didn't complete the contact - he passed me by after repeating my callsign and his designation.  I've tried calling CQ several times since I got the radio - from the readings I've gotten, I'm getting out (on frequency and it should be a clean signal) - but no replies besides the one.

I've heard that there is a bitx40 net on 40 meters on Sunday afternoon... 7.170 from what I've read.  Will anyone be on there?  I really would like to use this radio for which it was made... qrp SSB ragchewing (and emergency operations as needed).

Bob
N4FBZ


Beta 1: Nextion files for 5", 7" and 9" screens for CEC software

Mark Hatch
 

Hi all,

Happy to announce that I have completed what i consider "beta 1" for the 5" version of the CEC user interface. Note this user interface is substantially different than the original one released by KD8CEC (see screenshots below). It has been optimized for 800x480 screens and is probably not easily migrated to smaller ones (sorry), But if you are a lucky ham with either a 7" or 9" Nextion, should be a simple matter of opening the ".hmi" file up in the Nextion editor, change the Device settings to match your screen, and compile it to create a tft file. I would also like to acknowledge the original work done by Joe Puma (KD2NFC), without his headstart, i would probably have not been able to complete this.

The files (both .tft and .hmi are in the files section for this group.: Files/AJ6CU Nextion 5-inch files/Nextion5inch June 23, 2019-Beta1/

The following screenshots show some of the new GUI.

MAIN MENU
The main change here was to Group the various functions in to "Applications", "Settings" and "Expert". I did some renaming so that it was clear on the function. Also, Factory Recovery now has its own screen that clarifies what is happening (for dummies like me...). And there is an "About" screen...



ABOUT SCREEN
Every applications should have its own About screen. :-) . Note that in addition to credits and version, there is a list of the 3 known problems.



Save/Recall from Memory
Ok, probably didn't have to redo this one, nothing really wrong about the way it was done. But I added a popup virtual keyboard for adding a label/tag to a memory location. And I also made sure that the Current VFO setting was kept update. That allows you to turn around on your VFO while the Store to Memory is onscreen and you can save it whenever you find something interesting.




BANDSCAN
The Bandscan as originally designed had a number of problems including only able to look at signals 2k at a time and a maximum bandwidth of ~250kHz. This meant that if you scanned 80m, you only got the bottom half of the band. I personally didn't like the way bands were pre-selected, i preferred that the user could select any three in any order. I also added several missing bands.  (For folks outside of USA FCC, it is easy to change these bands from within the .HMI file. Let me know if you would like to do this and I will provide details.) . There are still some room for improvements here. I might experiment with a smaller frequency step and smaller scan bandwidth. But that would be a future effort... 

The first photo below shows the popup selection of offsets from the beginning of the band (I used a mechanism similar to how the mode CWL/USB, etc is selected on the front page). The second photo 
shows a completed band scan that gets to the top of the 3 selected bands. 



CW Decoder
Made some minor GUI changes and renamed this to reflect its functionality. Added a slider switch on left to select between Signal analysis and CW decode.


 

Factory Recovery
Previously, pushing Factory Recovery required you to press it 3 times to run Factory Recovery. But there was no explanation of what it did and why you probably did not want to do it. I added a separate screen with explanation and double confirmation.



Main Menu

Just added direct access to Store/Record to Memory (see upper right). Also liked this spectrum I captured on Field Day. :-) 



My Setup
Not sure anybody cares, but I ran both a 5" and a 3.2" display simultaneously (thanks Ian!) during development. This allowed me to quick answer the question: "What did Ian originally attend for this screen to do?"  It was very helpful and I recommend this to anybody else that is doing development for Nextion.



That's all for now!
73
Mark
AJ6CU


Re: #v5 finally got my V5 together and working, PA bias question #v5 #ubitx #pabias

Dennis KL4LG
 

I had read somewhere that when adjusting the pa bias on the ubitx you did not want to draw more than one amp when measured between transceiver and the power supply.

I have been trying to measure base line voltage, current, and resistance readings, so if I smoke something I can troubleshoot easier.


Re: New UBitx v5 Cannot Tune in Signals on Field Day + Lots of Birdies

V Zecchinelli
 

Did you do the following from hfsignals?

"µBITX Tuneup

The µBITX comes pre-aligned. You should do this only if you really think it is out of alignment.

There are three things to be tuned up.

1. PA BIAS

  • Switch off the rig
  • Locate the two PA bias presets (the blue square ones)
  • Set both the presets  to fully clockwise position, gently.
  • Attach a dummy load or a low SWR antenna and switch the rig on
  • Attach a current meter to the power supply so can monitor the current draw
  • Switch on
  • Press the PTT without speaking ( no modulation)
  • The current draw should be between 470 mA and 500 mA
  • Slowly increase one of the two presets until the current increases to by 100 ma
  • Do the same for the other preset (the total current should have increased by 200 ma now)
  • Now, blow a loud HALLLOWWW into the mic.

Does the current flick up?  You’re done with PA Bias

2. Aligning the master clock

All the frequencies of the µBITX are derived by multiplying/dividing to the required frequency from a single 25 MHz crystal. This crystal is rarely at exactly 25 MHz. We have to calibrate this clock to the exact frequency. Here is how it is done

  • Click on the encoder button to display the menu, rotate it to the “Setup On?” and click on to confirm it. This enables the setup options.
  • Tune to an AM broadcast signal with known frequency.
  • Set the dial of the µBITX to read the exact given carrier frequency of the station. If your calibration is out, this will NOT be zero-beat.
  • Click on the encoder button again to display menu and this time it will show up a new option ‘Set Calibration?’. Click to enter this option
  • Now zero-beat to this signal (the frequency display of µBITX will remain the same)
  • Press PTT to save the calibration.

3. Setting the BFO

  • Click on the encoder button to display the menu, rotate it to the “Setup On?” and click on to confirm it
  • Tune to an clean and preferably weak SSB signal to its loudest (not the clearest)
  • Click on the encoder button again to display menu and choose  Theoption ‘Set the BFO’. Click to enter this option
  • Now tune with the encoder for the best sounding audio
  • Press PTT to save the calibration.

Done."



On 6/23/2019 10:55 AM, jsternmd wrote:
Just got my new UBitx v5 with firmware 5.1.  While waiting for the board, I got a nice case from www.amateurradiokits.in and prepared it per instructions.  Only thing I added was creating a single chassis ground, grinding off paint, and using that as a star-point to ground the UBitx board and the other analog/digital PCB that www.amateurradiokits.in includes to facilitate wiring.  When I got the UBitx I hooked it all up and it powers up fine however inot a dummy load the background noise level 'sounds' high and there are birdies in a lot of spots on the ham bands.  I tried to systematically tune to see if any pattern but there were quite loud ones and then quieter ones in between so I gave up for now.  Next since this weekend is ARRL Field Day I tried to tune in stations on 40m and 20m without any success.  Many stations were booming on the UBITx (i double checked and these were S-9 on my Flex) and dozens of S5 or better.  I could not tune in any station to understand the voice.  I thought maybe LSB and USB were somehow reversed because it sounded a lot like the problem if you have the wrong sideband selected.   Any advice appreciated.  

Jerry NY2KW

PS I have a UBitx v3 in a friends house which I will pick up tonight to see how that differs.  Am I correct that I should not swap Raduinos, i.e. not to use the v5.1 Rad on the UBitx v 3 ???


New UBitx v5 Cannot Tune in Signals on Field Day + Lots of Birdies

jsternmd
 

Just got my new UBitx v5 with firmware 5.1.  While waiting for the board, I got a nice case from www.amateurradiokits.in and prepared it per instructions.  Only thing I added was creating a single chassis ground, grinding off paint, and using that as a star-point to ground the UBitx board and the other analog/digital PCB that www.amateurradiokits.in includes to facilitate wiring.  When I got the UBitx I hooked it all up and it powers up fine however inot a dummy load the background noise level 'sounds' high and there are birdies in a lot of spots on the ham bands.  I tried to systematically tune to see if any pattern but there were quite loud ones and then quieter ones in between so I gave up for now.  Next since this weekend is ARRL Field Day I tried to tune in stations on 40m and 20m without any success.  Many stations were booming on the UBITx (i double checked and these were S-9 on my Flex) and dozens of S5 or better.  I could not tune in any station to understand the voice.  I thought maybe LSB and USB were somehow reversed because it sounded a lot like the problem if you have the wrong sideband selected.   Any advice appreciated.  

Jerry NY2KW

PS I have a UBitx v3 in a friends house which I will pick up tonight to see how that differs.  Am I correct that I should not swap Raduinos, i.e. not to use the v5.1 Rad on the UBitx v 3 ???


Re: #v5 finally got my V5 together and working, PA bias question #v5 #ubitx #pabias

Wayne Leake
 

 I think there is some confusion here.
 some are confusing the draw of the final or finals  with total draw of the whole unit in  TX  mode.
 Wayne WA2YNE


_._,_._,_


Re: 2.8 Mhz parasitic signal on 15 and 20m #ubitx

 

Please edit and leave in parts of the message you are referring to in your reply. In my case
when I dont see trailing message content I dont bother to read or reply as I cant be bothered
to figure it out who anyone is talking to.

Your problem is interesting, please show us a spectrum of it. I have not encountered any such
fixed spacing spurs, they always move closer and farther from carier as I tune.

Raj

At 23-06-19, you wrote:
any tips on how to test or mitigate? I have access to a very well equipped HF lab tomorrow.


Re: 2.8 Mhz parasitic signal on 15 and 20m #ubitx

Thomas DD2TH
 

any tips on how to test or mitigate? I have access to a very well equipped HF lab tomorrow.


Re: 2.8 Mhz parasitic signal on 15 and 20m #ubitx

 

Very strange issue. Final may be oscillating ?


At 23-06-19, you wrote:
Haha, Raj, He hasnt read our emails?

On Sun 23 Jun, 2019, 9:59 AM , < fr.beckenbauer@...> wrote:
the difference is constant, both when tuning and when changing band

it's a V3


Re: Power supply from a repurposed pc PSU

Ian Reeve
 

I can believe that,properly specified and designed in the era when items were of quality,not like today where there is little or no filtering.


From: BITX20@groups.io <BITX20@groups.io> on behalf of Thomas Sharka via Groups.Io <sharkatw@...>
Sent: Sunday, June 23, 2019 7:31:49 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Power supply from a repurposed pc PSU
 
And it's an Antec as well. Antec power supplies have some of the best specs for low RFI emissions. I replaced a bad chinesium power supply in my desktop with an Antec and the background noise levels dropped on my receive by 3 S-Units.



Sent from Yahoo Mail. Get the app


On Sunday, June 23, 2019, 02:03:35 AM EDT, Ian Reeve <ian.radioworkshop@...> wrote:


Repurposed computer power supplies are a excellent provider of a clean 12v supply and a few minutes work to add suitable connectors,it will do a grand job.


From: BITX20@groups.io <BITX20@groups.io> on behalf of Jim <Jscook@...>
Sent: Sunday, June 23, 2019 6:53:27 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Power supply from a repurposed pc PSU
 
Neat set up there with the banana connectors.




Re: Power supply from a repurposed pc PSU

Thomas Sharka
 

And it's an Antec as well. Antec power supplies have some of the best specs for low RFI emissions. I replaced a bad chinesium power supply in my desktop with an Antec and the background noise levels dropped on my receive by 3 S-Units.



Sent from Yahoo Mail. Get the app


On Sunday, June 23, 2019, 02:03:35 AM EDT, Ian Reeve <ian.radioworkshop@...> wrote:


Repurposed computer power supplies are a excellent provider of a clean 12v supply and a few minutes work to add suitable connectors,it will do a grand job.


From: BITX20@groups.io <BITX20@groups.io> on behalf of Jim <Jscook@...>
Sent: Sunday, June 23, 2019 6:53:27 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Power supply from a repurposed pc PSU
 
Neat set up there with the banana connectors.




Re: Power supply from a repurposed pc PSU

Ian Reeve
 

Repurposed computer power supplies are a excellent provider of a clean 12v supply and a few minutes work to add suitable connectors,it will do a grand job.


From: BITX20@groups.io <BITX20@groups.io> on behalf of Jim <Jscook@...>
Sent: Sunday, June 23, 2019 6:53:27 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Power supply from a repurposed pc PSU
 
Neat set up there with the banana connectors.




Re: 2.8 Mhz parasitic signal on 15 and 20m #ubitx

Ashhar Farhan
 

Haha, Raj, He hasnt read our emails?


On Sun 23 Jun, 2019, 9:59 AM , <fr.beckenbauer@...> wrote:
the difference is constant, both when tuning and when changing band

it's a V3


Re: Power supply from a repurposed pc PSU

Jim
 

Neat set up there with the banana connectors.


Power supply from a repurposed pc PSU

rnharp@...
 

I needed a regulated power supply to run my mBitX and a couple arduino kits, but didnt feel like shelling out a hunderd + bucks. So I modified an ATX power supply from a dead pc. I get 3v, 5v, and 12 volts, made from parts on hand. I also salcaged a bunch og parts from the dead pc, including a few torroids from another power supply.


Re: 2.8 Mhz parasitic signal on 15 and 20m #ubitx

Thomas DD2TH
 

the difference is constant, both when tuning and when changing band

it's a V3


Re: Tuner? Well Sure!

jk.futter@...
 

I'm intersted in a kit as well (ZL2TUD)
I have been using OMRON  G2RL-1-E-CF relays for filter /antenna selection they are good to over 1kW CW and are relatively cheap differnt coil voltages are available
This is backed up by W6PQL who has done lots of testing and uses them up to 70cm.
The inards of these relays is very close to the relay corners and an inadvertant touch with the soldering iron will render the relay useless.
No relay will handle huge RF currents while switching so tuning has to be done at reduced power


units EPROM memory allocation map?

Mark Hatch
 

Hi,

Is there a map of the ubitx EPROM memory somewhere that shows locations are allocated vs those that are "free"? As I am working on the 5" Nextion UX, it would be useful to store some values (e.g. offsets from beginning of band for the band scan function) so that the user would not have to enter them on every boot. Using ubitx Datamanager, there does appear to be lots of zeros....

Mark
AJ6CU


SolderSmoke Podcast: Boatanchots, Antuinos, and SDR too

Bill Meara
 


Re: V4 Raduino

mtngentleman@...
 

WHICH MODEL IS IT FOR?
SHEP AA7MH