Date   
Re: uBITX adjustable power supply?

Tom, wb6b
 

Thanks, that is good to know.

Re: K5BCQ click fix 2nd generation installed #ubitx

W7PEA
 

OK, I am stumped and I could use some help. For context, the issue is no Audio at all when powered on ANT attached or not.

I annotated this drawing to match my pictures.


Here's what I've tested all but the TX test was without mic attached:
  1. Rework
    • I resoldered a few wires that didn't look great.
    • I cleaned up a dropped blob of solder that was all over C250 and R251 on the main board. (oops)
      Ultimately, I had to pull C250 off the board, clean the solder off the board and reattach. The solder caps came off C250. I rebedded it in solder on the pads as best I could. It is firmly attached and continuity around it is correct. <<-- This might be it. Not sure.
    • I cleaned the board and main board anywhere I did work with rubbing alcohol and a q-tip
  2. I replaced my TDA2822 just to see and it had no change.
  3. General Continuity Tests
    • I have continuity from the outboard end of the wire (from the main board) to the next component on the add-on board (i.e., across the next trace) as follows:
      • Blue  to R5
      • Brown to R3
      • Black to C1
      • Purple to Bottom right leg of Q3 (as in drawing above)
      • Yellow to R2
      • Orange to top of Q2
    • My trace breaks on the main board are all good. No continuity across those.
    • My jumper wires at the breaks are good. Continuity across those tested across and not on the jumper wires.
  4. Power Tests (RX)
    • I DO NOT see any voltage on Blue wire to the Black wire (GND) on the board. This makes sense .. its on the TX side.
    • I DO see 12v from on the Brown wire to Black wire (GND) on the board. This is the RX side so again, that makes sense.
  5. TX Tests
    • PTT does enable TX on the display
    • PTT turns on 12V on the Blue TX wire (see above)
    • PTT turns off 12V on Brown RX wire (see above) 
  6. Speakers
    • I tested with a mono speaker that I've used before
    • I've tested with a stereo headphone that I've used before

My fear is that I've messed up the capacitors (that's what those brown things are right?) at C250, C50 and C63.

Am I correct in my sizing of these from the V3 schematic (http://www.hfsignals.com/wp-content/uploads/2017/12/ubitxv3.pdf)
C50 & C63 - 1u
C250 = .1u

Am I also correct that C50 and C63 are polarized? I could have screwed that up when I desoldered them, dropped them 300 times before I barely stood them on end and tombstoned them. ;)

I'm stumped and could definitely use an Elmer.
Thanks!
Patrick W7PEA

Re: uBITX adjustable power supply?

Tom, wb6b
 

My apologies for the stream of consciousness nature of these last few posts. But, if it turns out one of the power converters can't handle the load, I realized the uBITX does not use a center tapped output transformer. I might try supplying each half of the push-pull finals with a separate boost converter.

That will save me the gas of going to the post office to pick up another order of boost converters :)

Tom, wb6b

Re: (Some) Nextion Displays not working

Glenn
 

You need to program the uBITX NANO with the correct Nextion code also.

See this page http://www.hamskey.com/2018/07/ubitx-firmware-cec-version-1095beta.html

vk3pe

Re: (Some) Nextion Displays not working

Glenn
 

Specificially this section of the web page

1.1 uBITX firmware for Nextion LCD
uBITX firmware has released .Hex files for various LCD since 1.073Beta version as below
Since Version 1.091, uBITX Firmware release .Hex files with file names ending in _NX.hex.
  
The file name ends with _NX.hex is uBITX firmware for Nextion LCD.

Re: K5BCQ click fix 2nd generation installed #ubitx

Don, ND6T
 

Very well documented Patrick! The original C50 and C63 are not polarized. C250 is part of the sidetone filter and would not cause your problem, but C50 is certainly suspect. Try substituting something for C50. Anything from 0.1uF to 10 uF. If you use a polarized substitute put the positive side toward Q70 and R50.
Do you have any signal tracing equipment (tone, oscilloscope, outboard audio amp)? Those would be quite helpful at this point and would have saved you a lot of work. It appears that you have done everything properly but it is 3AM and I am not competent enough at this time to be sure. I'll keep studying your message. 73, Don

KD6CEC code and Nextion displays, tuning skips steps #radiuno #ubitx

Glenn
 

Has anybody with this combination of Raduino noticed that the Encoder skips steps when tuning up or down.  ie the tuning is not in the nominated 100Hz steps but often skips 200-300Hz or more, unless the encoder is tuned VERY, VERY slowly.

I have tried several Encoders, but with the same result.   I "think" the Sketch uses polling to read the Encoder which may be the problem, but interested to hear if others have noticed this at all.

glenn vk3pe

Re: logic mod for filter selection #arduino #ubitx

Don, ND6T
 

Bravo! An elegant solution!
I've been eying those feeds to the 1602 display. When the display is not being programmed (which is most of the time) they could be available for some things. -Don

Re: (Some) Nextion Displays not working

Björn Pasteuning
 

Hi Glenn,

I am using the latest firmware for the Ubitx(nano), v1.095beta the NX and the NXU version.

Only my 2.8" works, not the 3.2" nor 4.3"  will work..

Cant figure out, why 2.8 works and my others wont.
--
73' Björn de PD5DJ
www.pd5dj.nl

K5BCQ AGC gain control and audio link. #ubitx-help #ubitx

derek (G4VWI)
 

Version 4 board installation is going well and thanks to K5BCQ for an excellent AGC board and SMT components.
However, I am not sure about mounting a remote gain control for this. I wonder what others have done?

Can you tell me what your experience has been connecting this board using the three header pins directly to the main board.

Where have you taken the 5v supply from and the gain control wires from. Have you found it necessary to use screened cable to the potentiometer?

Are you using the original 5K Pot or as shown on the circuit diagram a 1K Pot. Probably doesn't make a difference in this application.

Your findings are most welcome prior to cutting and drilling the board and adding a front panel gain control.

Best wishes Derek G4VWI.

Re: surprising CW sidetone value in uBITX Manager 0.11 #ubitx

Jack Purdum
 

Virgin EEPROM on the Arduino family is set to 0xFF. My guess is that some value the software needs from EEPROM has not been set.

Jack, W8TEE

On Thursday, July 19, 2018, 11:52:48 PM EDT, Mike KK7ER <groupio@...> wrote:


Alas, having the correct version of uBITX Manager did not solve the problem.  Now the CW Side Tone and CW Speed both show as 65535 (0xFFFF).  They are still just as meaningless as before and do not correspond to the values shown on the LCD display.
FYI.

73 Mike KK7ER

Re: KD6CEC code and Nextion displays, tuning skips steps #radiuno #ubitx

 

I had an issue with encoders several years ago, in a PIC application.  I looked at the A/B outputs and noticed spikes on the square waves.  Adding two .001uF caps across the outputs to ground, cured the issue.  Maybe that will help?  Most likely you encoder is easy to get to...
Your mileage may vary,
Jim W0CHL

uBitX CAT problem on 40m #ubitx #ubitx-help #ft8

John
 

Hello all,

I just put my antenna in a u-shape in the attic and have a better swr now so I was able to try the uBitX on 40m for the first time.
What I experience only on 40m is that while using WSJT-X my uBitX locks up and gets stuck on TX. All the shorter bands (30/20/17/15/12 and 10) don't cause this issue.

Running CEC firmware v1.095 with Nextion 2.4 display.

When the lock up happens I get the warning message "RIG Control Error, Do you want to reconfigure the radio interface" and when I look on the uBitX the TX symbol is lit.

I don't have any chokes on my audio cables and have been working on the higher bands without any problems.

Any clues?

John

Re: uBitX CAT problem on 40m #ubitx #ubitx-help #ft8

Marc Jones
 


Sounds like a Bit of RF is getting in there ...


Gw0wvl

On Fri, 20 Jul 2018 at 13:24, John
<jjczon@...> wrote:

Hello all,

I just put my antenna in a u-shape in the attic and have a better swr now so I was able to try the uBitX on 40m for the first time.
What I experience only on 40m is that while using WSJT-X my uBitX locks up and gets stuck on TX. All the shorter bands (30/20/17/15/12 and 10) don't cause this issue.

Running CEC firmware v1.095 with Nextion 2.4 display.

When the lock up happens I get the warning message "RIG Control Error, Do you want to reconfigure the radio interface" and when I look on the uBitX the TX symbol is lit.

I don't have any chokes on my audio cables and have been working on the higher bands without any problems.

Any clues?

John

Re: uBitX CAT problem on 40m #ubitx #ubitx-help #ft8

M Garza <mgarza896@...>
 

I would suggest putting a clip on ferrite core on the USB cable, right at the Raduino connector and one on the wires from the Raduino connector going to the encoder.
Others have brought this issue up and this was the easiest and quickest solution.
73s,

Marco - KG5PRT 

On Fri, Jul 20, 2018, 8:04 AM Marc Jones via Groups.Io <gw0wvl=yahoo.co.uk@groups.io> wrote:

Sounds like a Bit of RF is getting in there ...


Gw0wvl

On Fri, 20 Jul 2018 at 13:24, John
<jjczon@...> wrote:

Hello all,

I just put my antenna in a u-shape in the attic and have a better swr now so I was able to try the uBitX on 40m for the first time.
What I experience only on 40m is that while using WSJT-X my uBitX locks up and gets stuck on TX. All the shorter bands (30/20/17/15/12 and 10) don't cause this issue.

Running CEC firmware v1.095 with Nextion 2.4 display.

When the lock up happens I get the warning message "RIG Control Error, Do you want to reconfigure the radio interface" and when I look on the uBitX the TX symbol is lit.

I don't have any chokes on my audio cables and have been working on the higher bands without any problems.

Any clues?

John

Re: uBitX CAT problem on 40m #ubitx #ubitx-help #ft8

Gordon Gibby
 

Radio interference! Happens on whatever bands you get currents through sensitive junctions. 

Experiment try to fix it, add grounds, single point ground, try ferrites lots of different places, eventually you will stop the current that is locking up the rig.


On Jul 20, 2018, at 08:24, John <jjczon@...> wrote:

Hello all,

I just put my antenna in a u-shape in the attic and have a better swr now so I was able to try the uBitX on 40m for the first time.
What I experience only on 40m is that while using WSJT-X my uBitX locks up and gets stuck on TX. All the shorter bands (30/20/17/15/12 and 10) don't cause this issue.

Running CEC firmware v1.095 with Nextion 2.4 display.

When the lock up happens I get the warning message "RIG Control Error, Do you want to reconfigure the radio interface" and when I look on the uBitX the TX symbol is lit.

I don't have any chokes on my audio cables and have been working on the higher bands without any problems.

Any clues?

John

Re: KD6CEC code and Nextion displays, tuning skips steps #radiuno #ubitx

 

I have noticed this as well. For example when you set the step size to 50 Hz if you tune quite quickly it seems that the step-size
increases. 

Are you sure that this isn't intentional ?  I see to recall Ian making a passing comment about variable rate tuning at some point.

Michael VE3WMB

P.S. I am really enjoying the ability to select the step size via touch screen in V2 of Ian's "Nextion" display code. This was a great addition.

I may have found another bug though. More on this later when I have had more of a chance to test it out. 

Re: uBitX CAT problem on 40m #ubitx #ubitx-help #ft8

Bill Cromwell <wrcromwell@...>
 

Hi John,

I assume that you are using a computer connected to the radio since you are running WSJT-X AND CAT. It may be the computer that is being tickled by stray RF.

How is your RF ground configured? The shrortest cable possible to a good earth ground is desirable but may have a length that presents a high impedance to ground for RF at one or more bands. Before you put a lot of effort into that (assuming you already have some sort of grounded cable) try to connect your computer 'common' to the same RF ground you use for your radio. At least bond the radio chasis ground and computer ground. If I don't have that RF ground included on the computer frame I have some nasties that show up too.

The suggestions in the other replies this far are good too.

73,

Bill KU8H

On 07/20/2018 08:24 AM, John wrote:
Hello all,

I just put my antenna in a u-shape in the attic and have a better swr
now so I was able to try the uBitX on 40m for the first time.
What I experience only on 40m is that while using WSJT-X my uBitX locks
up and gets stuck on TX. All the shorter bands (30/20/17/15/12 and 10)
don't cause this issue.

Running CEC firmware v1.095 with Nextion 2.4 display.

When the lock up happens I get the warning message "RIG Control Error,
Do you want to reconfigure the radio interface" and when I look on the
uBitX the TX symbol is lit.

I don't have any chokes on my audio cables and have been working on the
higher bands without any problems.

Any clues?

John

--
bark less - wag more

Re: calibrate v4 ubitx

 

Jerry,

I agree that calibration is a 'exercise', why does it need to be this hard. I'm no coder, but Don ND6T's calibration routine worked really good for me when I was calibrating my Bitx 60, http://www.nd6t.com/bitx/Calibration.htm  All we need to know is what our actual 25Mhz crystal frequency is and change that line in the sketch, then all we need to adjust is the BFO frequency which is easy when the rig is on frequency. I don't know how to code so I'm not sure what is involved in adding something like this to the existing sketch but it sure beats zero beating.

Joel
N6ALT

Re: uBITX adjustable power supply?

Jerry Gaffke
 

Maximum available output current will fall drastically as the output to input voltage ratio rises.
You might get 4A out if the input voltage were about equal to the output voltage,
it falls off from there as you ask for higher output voltages.
Also, as that voltage ratio rises, the output current gets much choppier and noisier,
demanding more from the inductor and diode and output filter cap for acceptable results.

These things can work, but as you have found the spec's they give are "optimistic" at best.

Here's a tutorial on boost converters:
    https://en.wikipedia.org/wiki/Boost_converter

And a datasheet for the chip used:
    http://www.haoyuelectronics.com/Attachment/XL6009/XL6009-DC-DC-Converter-Datasheet.pdf

Note that pin 2 of the chip is an ENABLE pin, could pull that low during receive.
Most of these modules don't give you an explicit connection on the board to shut it down,
but if you study the data sheet of the part used it is often possible.

Using two modules, one for each FET as you suggest, should work on the uBitx.
Though that means two spots to adjust output voltage, and twice the number of places it can fail.
A single large boost switcher might be better.

Jerry, KE7ER


On Fri, Jul 20, 2018 at 01:28 AM, Tom, wb6b wrote:
My apologies for the stream of consciousness nature of these last few posts. But, if it turns out one of the power converters can't handle the load, I realized the uBITX does not use a center tapped output transformer. I might try supplying each half of the push-pull finals with a separate boost converter.