Date   
Re: Keyer for ubitx #ubitxcw

Joe Puma
 

Hi Sam, do you hear your mic audio in your speakers with that amp and also not having much shielding on the wires. or do you just do CW with your rig?

Joe

On May 28, 2019, at 11:25 AM, Sam Tedesco <stedesco619@...> wrote:

http://ubitx.net/2018/07/31/glitch-on-cw-keying-on-ubitx/

I lifted r52, on side towards 2822 chip, add diode in series...cathode down to board (ver 3 board). This took out all extra characters for paddles and key.

On my 3.5" sunil case, I left the key alone on front panel and ran the paddle circuit on the rear daughter board. On the pic, you can just see the two resistors on the daughter board come together and are ran under the main board to the front panel. I soldered the wire to the pull up resistor on the side away from the key input.

If you want to run paddles up front, you have to cut a trace on Sunil's front input board...I have not done this. <IMG_20190402_053934.jpg>

Re: VU Meter from Sunil

Mark Hatch
 

Curt,

For whats is worth, I believe that the issue with nd6t (version sold from kits-project.com) and V4 has been addressed. Since that is an IF solution vs what looks iike (in my very ignorant knowledge) I had planned on using that instead of the volume based AGC that Sunil's kits provided. Have you been in touch with kits-projects to check in?

73
Mark
AJ6CU

Re: Keyer for ubitx #ubitxcw

Sam Tedesco
 

I pretty much only run cw...but, I don't recall hearing any audio in my speakers. I only ran a few tests with the mic to make sure it wasn't overdriven with the linear hooked up. All was good...

@kelly, I took a quick peek at the schematic and it looks like the resistor is the same number on v5. I'll get a pic later, if you need one.

Re: uBitx Opto Coupler / VFO not working #ubitx-help #ubitx

rnharp@...
 

I had the same problem. I fixed it by doing the following: After tripple verifying that the wiring was correct I removed the encoder from the chassis, and sanded the metal bare on the inside of the chassis; cleaned the inside of the power port with contact cleaner, and disconnected/ reconnected the leads on the batteries. I still only show 2v on the red pin, but the encoder tunes now, all menu functions work, tests with a dummy load show I get 10w out on 80/ 40m  4-7 watts on other bands. As I did all three "fixes" at the same time I dont know which one or combination fixed the issue

Re: Antuino

Charles Agosti
 

I had no power up on mine .found two reasons 1 battery holder not making contact on + battery tips and cold a solder joint from external DC input jack and battery cable header .Best to reflow these points.

Unit works well in VSWR mode in fact it works better than my $400.00 comet unit that gets overloaded by nearby FM radio station @96.5 MHz in my backyard....
Wd8axa

On Tue, May 28, 2019, 2:06 AM Ashhar Farhan <farhanbox@...> wrote:
Bruce, it is possible that there is too much gain. You can remove R8 (2.2K) resistor that provides feedback to the Q1 transistor to switch off that stage and use a 0.1uf capacitor between C11 and C7 to bypass that stage. you will have to rerun the return loss recalibration routine before you can accurate readings. I will try these out at my end too.

- f 

On Tue, May 28, 2019 at 2:20 AM Bruce Hall <bhall66@...> wrote:
All,

Does anyone see gain compression at the higher dBm levels?  Or does everyone else see a linear response on their units?  I have been adding 20-30 dB of attenuation to get into the linear part of the curve, but this significantly reduces the useful range of the device.

I am wondering if there is too much amplification in the IF section.   What would be a good method to troubleshoot?

Bruce


On Wed, May 22, 2019 at 8:48 PM Bruce Hall via Groups.Io <bhall66=gmail.com@groups.io> wrote:
I took a few more measurements, adding in 3dB and 6dB steps at higher attenuation values.  It looks like the additional 3dB and 6dB steps are attenuating RF appropriately.  But the shape of the graph remains non-linear.   See attached.   

I am not sure what to try at this point; any suggestions?

Bruce



On Wed, May 22, 2019 at 3:35 AM Ashhar Farhan <farhanbox@...> wrote:
This is interesting. There could be two possible explanations:
1. There is gain compression. This is possible due to the two stage IF amplifiers.
2. The step attenuator is off-calibration.

One way to know is to measure readings of smaller attenuations at different attenuations. For instance how does the readings change between -50db and -53db as opposed to -10 and -13 db? My tests show quite linear relationship between actual attenation and db readings.

- f

On Wed 22 May, 2019, 6:06 AM Bruce Hall, <bhall66@...> wrote:
I have been playing around with the Anduino.   I inserted a step-attenuator between the RF input and RF output ports.  With no in-line attenuation, the measured RF output is -16 dBm.   As I added attenuation, the measured RF power predictably decreased.   The receiver bottoms out at roughly -70 dBm, and does not record levels any lower - which makes sense.  What I don't understand is the non-linear relationship at low levels of attenuation.  For instance, adding 3dB, 6dB, or even 12 dB of attenuation did not significantly change the Antduino's displayed power measurement.  Independently, I crudely measured the RF power using my oscilloscope, and the power output changes as expected.   I am curious what results others get with their units.    Why am I getting a non-linear relationship between attenuation and RF power?

On Tue, May 21, 2019 at 7:52 PM Ashhar Farhan <farhanbox@...> wrote:
Peeps,
I just landed back home an hour ago. I will start putting the documentation for the antuino together tomorrow.

- f

On Wed 22 May, 2019, 4:12 AM Glenn, <glennp@...> wrote:
Rob i had issue with fonts also.   I still can't find the correct glcd LIB either, did you?.

Keep in mind I am a novice at this but do have Jacks book.

What i think it should be is to have all the Fonts in a directory called "fonts". Fonts.h is just a list of the fonts used in the Sketch.
in the same directory as the sketch.

then change #include <fonts/allFonts.h> to "fonts/allFonts.h"   so when you run the sketch in the IDE, it gets the fonts from the sub directory /fonts

I have another problem though in that i can't find a zipped version of the fonts required to download. 

I found the fonts here https://github.com/johnmccombs/arduino-libraries/tree/master/glcd/fonts
But if I right click on each entry  "Save As" the downloaded files have extra characters in them making them unusable.

glenn
vk3pe







On Tue, May 21, 2019 at 11:53 PM, Rob Bleumer wrote:
Ho Ashhar
Same question from me and I got also problems with the line containing fonts/allFonts.
Perhaps part of the same.
Rob PA0RBL

Re: Keyer for ubitx #ubitxcw

Kelly Mabry
 

Yes, please. I would appreciate that!
Again thank you Sam.

73, 
Kelly KD5AJ 

Re: Antuino

Bruce Hall
 

Farhan,

I tried a the mod you suggested and bypassed the IF stage.  In my case I removed the coupling caps on either side of the stage (C27 and C11), and soldered a new 100nF coupling cap between them (see attached).

I re-ran the return loss calibration and did a plot with the step-attenuator in place, also attached.   The graph is shifted down about 5dB.   I don't see good linearity until I add about 20dB attenuation.

Bruce


On Tue, May 28, 2019 at 2:06 AM Ashhar Farhan <farhanbox@...> wrote:
Bruce, it is possible that there is too much gain. You can remove R8 (2.2K) resistor that provides feedback to the Q1 transistor to switch off that stage and use a 0.1uf capacitor between C11 and C7 to bypass that stage. you will have to rerun the return loss recalibration routine before you can accurate readings. I will try these out at my end too.

- f 

On Tue, May 28, 2019 at 2:20 AM Bruce Hall <bhall66@...> wrote:
All,

Does anyone see gain compression at the higher dBm levels?  Or does everyone else see a linear response on their units?  I have been adding 20-30 dB of attenuation to get into the linear part of the curve, but this significantly reduces the useful range of the device.

I am wondering if there is too much amplification in the IF section.   What would be a good method to troubleshoot?

Bruce


On Wed, May 22, 2019 at 8:48 PM Bruce Hall via Groups.Io <bhall66=gmail.com@groups.io> wrote:
I took a few more measurements, adding in 3dB and 6dB steps at higher attenuation values.  It looks like the additional 3dB and 6dB steps are attenuating RF appropriately.  But the shape of the graph remains non-linear.   See attached.   

I am not sure what to try at this point; any suggestions?

Bruce



On Wed, May 22, 2019 at 3:35 AM Ashhar Farhan <farhanbox@...> wrote:
This is interesting. There could be two possible explanations:
1. There is gain compression. This is possible due to the two stage IF amplifiers.
2. The step attenuator is off-calibration.

One way to know is to measure readings of smaller attenuations at different attenuations. For instance how does the readings change between -50db and -53db as opposed to -10 and -13 db? My tests show quite linear relationship between actual attenation and db readings.

- f

On Wed 22 May, 2019, 6:06 AM Bruce Hall, <bhall66@...> wrote:
I have been playing around with the Anduino.   I inserted a step-attenuator between the RF input and RF output ports.  With no in-line attenuation, the measured RF output is -16 dBm.   As I added attenuation, the measured RF power predictably decreased.   The receiver bottoms out at roughly -70 dBm, and does not record levels any lower - which makes sense.  What I don't understand is the non-linear relationship at low levels of attenuation.  For instance, adding 3dB, 6dB, or even 12 dB of attenuation did not significantly change the Antduino's displayed power measurement.  Independently, I crudely measured the RF power using my oscilloscope, and the power output changes as expected.   I am curious what results others get with their units.    Why am I getting a non-linear relationship between attenuation and RF power?

On Tue, May 21, 2019 at 7:52 PM Ashhar Farhan <farhanbox@...> wrote:
Peeps,
I just landed back home an hour ago. I will start putting the documentation for the antuino together tomorrow.

- f

On Wed 22 May, 2019, 4:12 AM Glenn, <glennp@...> wrote:
Rob i had issue with fonts also.   I still can't find the correct glcd LIB either, did you?.

Keep in mind I am a novice at this but do have Jacks book.

What i think it should be is to have all the Fonts in a directory called "fonts". Fonts.h is just a list of the fonts used in the Sketch.
in the same directory as the sketch.

then change #include <fonts/allFonts.h> to "fonts/allFonts.h"   so when you run the sketch in the IDE, it gets the fonts from the sub directory /fonts

I have another problem though in that i can't find a zipped version of the fonts required to download. 

I found the fonts here https://github.com/johnmccombs/arduino-libraries/tree/master/glcd/fonts
But if I right click on each entry  "Save As" the downloaded files have extra characters in them making them unusable.

glenn
vk3pe







On Tue, May 21, 2019 at 11:53 PM, Rob Bleumer wrote:
Ho Ashhar
Same question from me and I got also problems with the line containing fonts/allFonts.
Perhaps part of the same.
Rob PA0RBL

Re: Missing some of the functions in the control panel on the 3.5 Nextion #bitx20 #nextion #smeter

Kelly Mabry
 

Dale, hello. I may be able to help out. I too had that problem at first on this mod.

I have two questions for you. First, did you load the raduino firmware that ended with "_S", which denotes the signal analyzer...?
With V1.2, there are updated Nextion files which have the new features that you must load to your Nextion.

Lastly, be sure that you load the signal analyzer file v.07 file to your second nano you placed in the ubitx. There is a v.08, BUT that does not relate to THIS mod. Be sure to get the v.07. Hope that helps!
73,
Kelly KD5AJ 

Re: Keyer for ubitx #ubitxcw

barry halterman
 

Kelly, you might want to use Dr. Lee's memory manager and in that you can specify at what point the adc ( from your front panel readings) will trigger a dot, dash or alternate between dot and dash.  Your values in MM could be at the edge of what your adc values are, thus giving you these problems.
I can not remember what default setting are but they are set for the listed resistor value in the dot and dash key lines on the jack. The adc readings change with contact resistance,  resistor tolerance and cosmic Ray's.
This issue drove me nuts until I finally entered the values that I was seeing with the adc on my V4.
K3BO

Re: Keyer for ubitx #ubitxcw

Curt
 

Kelly

let's not keep score on misteps - I might be pretty high on 'errors' also.  I am doing okay using the ubitx on cw with a straight key - it is enough to calibrate us this is not a QSK rig.  but I got used to it, and made many contacts.  I imagine a paddle should work as good, once you land the recipe - either with stock of KD8CEC firmware.  (there is a third source said to work better maybe, but try the easier path first). 

let's not give someone a discount to have the 'challenges' we have been having - they can pay full price hi hi.  this is some rig for what it costs.  on SSB is so cool to work DX with 5 watts (no I don't have huge antennas here).  enjoy the ride - and let the rig sit for a few days as required.  a 'world' full of aid is here in the journey. 

73 Curt

PS - don't wear yourself out on the simpler mods.  AGC helps but is not huge.  etc. nice you have a v5 - lots of info that the spurs are decent.  CUL here

Re: VU Meter from Sunil

Curt
 

Mark

QSL - I will have to read out of general interest on the v4 solution with ND6T.  honestly I like the VK3YE solution, its a third option for AGC but a road less traveled here.  as for the v3 and v4 community - I am hoping someone will kit solutions for a fix.  I have harmonic spurs addressed, now I do have some shielded inductors to try to see what they contribute. 

73 Curt

uBITX will not turn on

giant
 

Hi everyone,

I just built my uBITX kit, but it won't turn on. So far I have been able to check voltage at the power jack and the volume pot. Is there a guide for checking the radrino or other parts? Any other ideas?

Re: uBITX will not turn on

Bob Recny <n8sqt@...>
 

Ensure you have your antenna jack grounded. At least that's what the Ham Radio Crash Course podcast found - he did a live build during the podcast:  https://www.youtube.com/watch?v=ZJRak2571Sk


On Tue, May 28, 2019 at 4:17 PM giant_g2 via Groups.Io <giant_g2=yahoo.com@groups.io> wrote:
Hi everyone,

I just built my uBITX kit, but it won't turn on. So far I have been able to check voltage at the power jack and the volume pot. Is there a guide for checking the radrino or other parts? Any other ideas?

Re: uBITX will not turn on

giant
 

I couldn't see exactly what he did in the video. Is there somewhere else that I have to run a ground wire other than the black and brown wires on the 2 pin connector? I'm using a plastic case if that makes any difference.

Re: uBITX will not turn on

Bob Recny <n8sqt@...>
 

I'm not sure. I don't have my kit yet (due in Thu) to do a closer inspection.


On Tue, May 28, 2019 at 4:34 PM giant_g2 via Groups.Io <giant_g2=yahoo.com@groups.io> wrote:
I couldn't see exactly what he did in the video. Is there somewhere else that I have to run a ground wire other than the black and brown wires on the 2 pin connector? I'm using a plastic case if that makes any difference.

New Arduino Nano Every - new life for Ubitx software?

Mark Hatch
 

Just announced...

https://store.arduino.cc/usa/nano-every

Pin for Pin compatible....

                       Flash       SRAM      EEPROM .     Clock
Nano .            32kb .      2kb .        1kb .               16mhz
Nano every .  48kb .      6kb .         256 .               20mhz

Know that CEC was getting close to the max memory. :-) . Perhaps a typo, surprised that EEPROM went down.

73
Mark
AJ6CU

Re: uBITX will not turn on

Sam Tedesco
 

Pic of your wire up? If u have a cable, plug the raduino to 5v and make sure it fires up on its own. 

Re: uBITX will not turn on

Curt
 

Use your dvm to verify continuity fron dc input to the board, power off just use ohms setting.

Its easy to misinstall raduino one pin off in the connector.

Patiently look for a simple cause.

Curt

Re: Multiple Nextions *AND* Standalone Signal Analyzer (KD8CEC)

Mark Hatch
 

To answer my own question....

Yes, it will work!  Connect everything in parallel as Lee explains, *Including* routing the yellow wire on the second display through the second nano's DS9 pin.

Works great, now I can check the UX of the 5" Nextion (thanks Joe!) vs the 3.2 in real time.

Mark

Re: uBITX will not turn on

giant
 

How do I hook up the 5v directly to it? Is it the miniUSB?

I verified that all the pins are lined up for all connectors. With the power on, I verified that I have power to main board using the black wire at the power port as my ground. I'm not sure if this is the correct way to measure it.