Date   
Re: Updated to a larger Nextion screen

Mark Hatch
 

Love solutions like this!  Usually, i blow a transistor or something. :-)

73
Mark

Re: [JackAl] JackAl & uBITX for sale

Jack, W8TEE
 

Neither. Is a touch screen display and board that adds a bunch of features to the µBITX. Here's a copy of ours:

Inline image

Its features include:

5” or 7” TFT Touch Screen 800x480 TFT Color Display
Dual VFO
RIT
S Meter
Real Time Clock (add optional battery)
50 CW Preset Messages, selectable at runtime
Touch Screen Band Selection
Touch Screen Buttons for function selection and control
Dual Encoders: Frequency Tuning, ALS Tuning, Program Input
Frequency Tuning: Standard and ALS Tuning
ALS Tuning: Special tuning using the second encoder. If the frequency increment is set to 1KHz,
    ALS Tuning sets the second encoder to one-tenth the increment of the primary tuning
    rate. This allows for rapid tuning to an approximate frequency using the main encoder
    and then using ALS Tuning with the second encoder to fine tune the signal.
Filter Selection:
    CW presets (3dB bandwidth): 150 Hz, 300 Hz, 400 Hz, 600 Hz
    SSB presets (3dB bandwidth): 1500 Hz, 1800 Hz , 2200 Hz, 3000 Hz
EEprom storage of user preferences and CW code presets
3 external hardware buttons for CW code messages (e.g., contest exchanges)
Based on Teensy 3.6 Microcontroller with Audio Shield
Hardware AGC using IF take-off
Mic Compressor with adjustable threshold
Mic 8-band equalization
Receive Audio Filter
48 dB/octave (8 pole equivalent DSP filters)
2 Variable bandwidth filters – user defined knee frequencies with Rotary Encoder control
Audio AGC with adjustable threshold
Variable Notch filter, encoder adjustable, use specified Q
CW code to Text converter
Code Practice Oscillator Mode
About a dozen I/O pins to play with plus 800K of free flash memory, 200K of free SRAM, all clocked at 180MHz

Jack, W8TEE


On Friday, June 7, 2019, 1:12:43 PM EDT, tmize57@... <tmize57@...> wrote:


For those of us that are not up on versions and models can you provide pictures and a description?  Is this the Antenna Analyzer or QRP transceiver?
Thanks
Tim N7XAU

Re: 24 volt

 

That is where I got mine last I check though he was out of them. The one I made was overkill on the Heatsink as well, I did end up putting in the T-Pad so I could use 5W drive. It was a nice project and fun to build/use. I am running mine at 24v since I couldn't find a good solution to a nice 28v supply.
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Updated to a larger Nextion screen

Ian Reeve
 

Cheers Mark as an aside I have read that the 7805 regulator on the arduino gets rather warm in use.Without a Heatsink it does indeed but a modest Heatsink designed for such devices keeps the device nicely cool.A reduced supply to it instead of the 12 volts would do equally well but more difficult to implement than a screw fixed Heatsinks.  73. Ian


From: BITX20@groups.io <BITX20@groups.io> on behalf of Mark Hatch <mark2382@...>
Sent: Friday, June 7, 2019 6:12:26 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Updated to a larger Nextion screen
 
Love solutions like this!  Usually, i blow a transistor or something. :-)

73
Mark

V5 audio Help !

chuckr@hostu.org
 

Hi all , got my new V5 all together and all looked, good. The audio when cranked near full would about run you out of the room. So started the calibration and bfo routine and after that all seemed to work fine,So then a day or so later turned the radio on and no  audio!  Crank all the way up and you can hear but  not enough to work with, on a scale of 10 audio went from 10 to 1 or 1.5. Changed the lm386 out twice to no avail.  If anyone can direct me in the right direction or give their guess and any and all help appreciated .
thanks
chuck  73

Re: no audio

Sam Tedesco
 

I tried isolating the amp only. Nothing. I tried a radio shack amplified speaker on just the audio section of the main board...pre and post amp. Nothing. I tried isolating only the front panel. Nothing. Receive is gone. ???

Re: no audio

Arv Evans
 

Sam

Difficult to troubleshoot remotely without more information, but if there is no local
oscillator signal into the BFO mixer there would be no audio output from that stage. 
You might connect your external audio amplifier to the output of the BFO mixer to
see if there is audio there.  The level will be low, but audio should be heard on
strong signals. 

Arv
_._


On Fri, Jun 7, 2019 at 1:38 PM Sam Tedesco <stedesco619@...> wrote:
I tried isolating the amp only. Nothing. I tried a radio shack amplified speaker on just the audio section of the main board...pre and post amp. Nothing. I tried isolating only the front panel. Nothing. Receive is gone. ???

Re: Nextion 5/Enhanced for KD8CEC 1.2?

JT Croteau
 

Mark, please share your ESP32 circuit when ready.  Thanks


On Fri, May 31, 2019, 00:28 Mark Hatch <mark2382@...> wrote:
Jack (of JackAl fame), suggested that I might look at replacing that standalone signal analyzer Nano with a ESP32. At $10 for amazon prime for 250mhz + 1.3mb flash and Arduino IDE compatible.... Well, being delivered tomorrow. :-) Yet another project to learn from. :-)

73
Mark
AJ6CU

BTW: Now got horizontal and vertical scaling of spectrum analyzer working on 5". Lots of cosmetics yet....

Re: no audio

Evan Hand
 

Sam,
can you fill us in on what test equipment you have?  I would start by measuring voltages on the RX tags listed in th3 schematic.  I would then try supplying a signal to the audio section (sometime the hum from touching th3 test point is enough). 

If I am reading your comments correctly, I think you may have a short somewhere in the RX power supply.  ESP if all of the audio sections are down. That was wh6 testing the voltages first, the going to audio signal injection to see where the signal is lost. 

Good luck, and happy hunting:)
73
Evan
AC9TU

Re: Nextion 5/Enhanced for KD8CEC 1.2?

Mark Hatch
 

Definitely will share it!

However, may be a few months....  After I complete the screen work, I have to go after fixing the spurs and harmonics, then AGC, then amp, then maybe JackAl.  My todo list is too long. :-)

Mark

Re: V5 audio Help !

chuckr@hostu.org
 

No audio at all now. Is there no longer any help available? Please !

Output change.

cf_fizban
 

I have an upcoming qrp sprint that had a max of 5w for ssb. Is there an easy way to back the power output down to this and back after the two hours? I am running a v5 bitx with the updated firmware that uses the manager and will be working 40m ssb only.

Re: no audio

Sam Tedesco
 

Tried injecting audio. No go. I might have to venture before the mixer. I'm lost on this one

Re: Updated to a larger Nextion screen

Mark Hatch
 

Ian

i actually took the extreme step of mounting a 1.5a 7805 on the case.  And then I ran some wires to the Raduino (removing the original one).  Had no choice since the 5” Nextion draws 500ma. 

73
Mark

Re: Output change.

Curt
 

My v4 is a bit below 5w on 40m, but I digress.

First, consider accuracy of your power meter. I won't swear my wm2 is perfect. Some instruments seem to over estimate power a bit.

Possibly your v5 might be doing a couple extra watts. Don't have schematic in front of me, but there is a pot on the board to dial back drive. Hint it is not the 2 pots that adjust bias for clean ssb! Its the one other one. Make sure you tweak the correct pot. My android isn't good at multi tasking, you should figure this out.

Curt

Re: V5 audio Help !

Arv Evans
 

I will try to help.  Since I have not been following your specific thread, can
you bring me up to speed.  The topic indicates you are using a V5 uBITX.
What have you tried thus far?  Did it ever work?  If it once worked, what did
you do last before it stopped?  Does the tuning work (changeable frequency
display on the LCD)?  What type power supply are you using?  What is the
power supply output voltage.

Arv K7HKL
_._


On Fri, Jun 7, 2019 at 7:57 PM chuckr@... <chuckr@...> wrote:
No audio at all now. Is there no longer any help available? Please !

Re: no audio

Arv Evans
 

Sam

Confused here.  You said you do not have an oscope, so what is it that is making weird lines?

If injecting audio at the mixer output did not produce audio at the regular output then you have
probably isolated the problem to between the mixer and the audio output.  Follow the audio
path on the schematic and inject audio (use a 0.1 mfd cap for DC isolation) at each stage
in the signal path from mixer output to audio output.  At the point where you start hearing audio
measure DC voltages and look for any that are different from normal values.  If voltages near the
fault are all normal then you will probably need to look for an open in the circuit path (cold solder
joint or possibly a bad component). 

Arv


On Fri, Jun 7, 2019 at 8:31 PM Sam Tedesco <stedesco619@...> wrote:
I have most test equipment. Except for an oscope. All it ever does is make weird lines! 

Re: V5 audio Help !

chuckr@hostu.org
 

Hi, as mentioned first symptoms was the sudden drop in audio to near nothing after an attempt to wire audio to the mike plug ( second round four pin connector) for digital use. All was working fine until this point , I think i may have caused the Vol-H to get grounded. I have reversed all that I was doing and all wiring etc. to where it was last working at which time the audio would adjust so loud that one would have to cover their ears. For a day or so the audio was  still barely there and you could still tune around . as time went and I tried two lm386 and now the audio is completely gone except for the low clicking of the encoder as it turns.
All i have for testing is a multi-meter. I have checked all wiring for continuity. The radio still tunes and transmits as when it was new a couple weeks ago. I know this info is lacking and not really very tech but I will try to answer / our questions etc.
Thanks much
chuck

ubit-x V5 calibration #bitx20help

Mike Kilpatrick
 

Newbie to uBitx and at 74 years young new to arduino also.
I have a V5 ubitx.
Having trouble calibrating frequency & BFO.
I can adjust the frequency listening to another receiver and I can adjust the BFO to clarify SSB signals.  Problem is I can't work out how to retain the settings.  I've tried using the push button on the encoder and also the mic PTT but the settings always revert to what they were before I start adjusting.   
Any help would be much appreciated

V5 ubitx Calibration

Mike Kilpatrick
 

Newbie to uBitx and at 74 years young new to arduino also.
I have a V5 ubitx.
Having trouble calibrating frequency & BFO.
I can adjust the frequency listening to another receiver and I can adjust the BFO to clarify SSB signals.  Problem is I can't work out how to retain the settings.  I've tried using the push button on the encoder and also the mic PTT but the settings always revert to what they were before I start adjusting.   
Any help would be much appreciated