¿ªÔÆÌåÓý

  1. BITX20
  2. Messages
Expanded Topics Messages Polls
Date
Re: uBitxr4 audio distortion fix

 

Tried another uBitxr4 board and had the same problem.

I recommend this mod for everyone. Solder the pot and ZERO it and at low volume with the
band background noise increase the preset and you will notice the volume increasing. Leave
it a little more than the point you get max volume of noise. I am sure that will work for the
best.

Raj

At 29-06-18, you wrote:

Got back to town and plugged in the uBitxr4 and found the audio distorted.

Poking around the finals I found that the two diodes D15 and D16 gave only a drop of 1.2V total
but the final transistors needed more like 1.5V. i.e. 0.75v each.

I simply cut the track between D5 and D16 and soldered a 100 ohms multiturn preset as shown
in picture below. (Preset leads used is center and one side)

Start with the two soldered connections of the preset set to ZERO ohms.

Power on and tune to a station at low volume and slowly increase the preset till the audio
becomes clear. In my board the RX power consumption increased by 25mA at the best sound.
Just check and see that the output transistors are not getting hot.

My board sounded great with 47 Ohms between D15 D16 and I run at 13.6V. If you run at the
same supply voltage then you can try a fixed resistor. For 12V supply you could try a higher value
like 56/62 or even 68 Ohms.

Cheers

--
Raj, vu2zap
Bengaluru, South India.

Emacs! ?
Re: TX frequency? of uBitx at CWL and CWU mode #ubitxcw

hirosmb
 

¿ªÔÆÌåÓý

I am very much looking forward to your blog, Akira-san.

Please kindly post the URL here at this BITX20 ML.

Many thanks in advance.

// hiro, JJ1FXF



2018/07/03 18:07¡¢jj1epe@...¤Î¥á©`¥ë:

lan and everyone who replied me

I did not use uBITX manager.
But I have understood that using uBITX manager is essential to set? CW offset and for uBITX.

Now everything has been cleared by setting uBITX manager as follows
? ?- Enabled Adjust CW Frequency
?? - Shift Display Frequency on CWL, CWU Mode

Frequency displayed by uBITX and my ICOM rig is completely same!!
Thank you for your support!!

I have started to promote uBITX in Japan.
English as the language is the one of the big wall for most of Japanese people.
Even for me, this TX -RX frequency issue was hard to find the solution.
So I will make the article on my blog in Japanese about this topics.

73!
Akira
JJ1EPE
Re: TX frequency? of uBitx at CWL and CWU mode #ubitxcw

 

Ian :?

Yes I am currently using V1.094 beta with the Nextion 2.8" Display.

?I will upgrade to V1.095 and try that.

Cheers

Michael VE3WMB?
Smart Analog/Digital I/O Expansion and LCD Display for the uBITX. #firmware #ubitx #nano #radiuno

 

Hi,

I want to expand the amount of digital and analog I/O pins available to add enhancements to my uBITX.

To do that I created a Smart LCD Backpack to replace the commonly found ones on the inexpensive 2x16 and 4x20 I2C displays found on eBay and Amazon.

I uploaded a library to GitHub that allows you to program a Arduino Nano to emulate the common I2C to parallel backpack used on the I2C displays. The Smart I2C Backpack, additionally, allows you to read and write the analog and digital pins on the Smart I2C Display Backpack.

The package includes a interface library that you include in your code to interface with the Extended I/O functionally. Also included are two example Sketches. One is the code you program into the Smart Backpack. The other is a demo/test program you program into another Arduino and connected via the I2C buss to the Smart Backpack Display.

The Smart Display Backpack should work with firmware using standard I2C LiquidCrystal drivers such as the?KD8CEC firmware.

The code uses the following libraries:
The are all installable from the Arduino library manager, the GitHub URLs are just for reference.
SoftTimer.h ?//https://github.com/prampec/arduino-softtimer
Also requires:

LiquidCrystal_PCF8574.h

I believe these are part of the base Arduino software install.
Wire?
LiquidCrystal

Hope others enjoy this new display and I/O expander.?

Here is the link to the code.








SmartLCDandIOexpander_I2C_02.jpg
SmartLCDandIOexpander_I2C_05.jpg

Re: v4 pop-fix on a v3 board #ubitx

Don Meyerhoff
 

Good stuff. Just put one together myself. A little separate breadboard which I used a small portion so as to have room for another mod or two. Installing the Nextion 3.2 tomorrow. Love the ability to mod and work with it. Great value for the money.

73

Don Meyerhoff
WA2SWX

On Tue, Jul 3, 2018, 8:19 AM Nigel G4ZAL <nigel@...> wrote:
Forgot to mention, I also swapped out R70 from 100 ohms to 1K.

Nigel.

Re: Easy, Inexpensive Cooling Fan, Excelway Case

John P
 

On Wed, Jun 27, 2018 at 07:28 am, Jack Purdum wrote:
Is the fan quiet, or does the rcvr pick it up?
I tried a couple of fans from old PC supplies. They were all very noisy. What I did to solve the problem was to put a resistor (maybe 10 ohms; don't remember and not taking the radio apart) in series with the fan and a fairly hefty capacitor across the motor. The fan still moves more than enough air and is both electrically and acoustically quiet.
?
--
John - WA2FZW
Re: v4 pop-fix on a v3 board #ubitx

Nigel G4ZAL
 

Forgot to mention, I also swapped out R70 from 100 ohms to 1K.

Nigel.
v4 pop-fix on a v3 board #ubitx

Nigel G4ZAL
 

I added the v4 pop-fix to my v3 board by placing components directly onto the v3 board.
Start by drilling a small hole (0.7mm in my case) to the right of R70 so as to be able to fix the 2N7000 transistor.? Pin 2 of the 2N7000 is soldered on the underside of the board (ground).
Scrape a little varnish from the tracks and tin ready to fix the 2N7000.
I added some Kapton tape to stop any shorting of components.




Add the remainder of the components and run a bit of enameled wire to the trace near the raduino headers to pickup the T/R line.






Ignore the cutouts on the front of the board, I had to hack away a little to clear the 3.5mm sockets on my case (I had to add a small length of enameled wire on the underside as I had hacked through a board trace).

So far, so good with no problems to report.

Nigel.
Re: Nextion 3.2 Display

 

Hello everyone
I am interested in version 3.5 because I already have the Nextion. Thanks a lot to Allen Merrell and everyone involved, especially Ian Lee.
Michel F1GTX
Re: RFI problem at the encoder switch #ubitx-help

Dave Dixon
 

Hi Len,
?????????? From a unusually hot uk.
???????????????????????????????????????????????? My both my ubitx versions 3 and 4.3 are both ?in plastic cases and I have not encountered any problems on any of the bands I have used,.my only mod is adding KD8CEC software to one of my radios the other is on line for a nextion display and then also Ians software. Regards Dave G0AYD.

On 3 July 2018 at 09:23, <hakan.sjostrom@...> wrote:
Len,
the enclosure is metallic from amateur radio kits in India, so it should be well shielded.


Re: TX frequency? of uBitx at CWL and CWU mode #ubitxcw

Andy V. Borisenko
 

Ian,
at which address do you send a copy of the settings?
Re: TX frequency? of uBitx at CWL and CWU mode #ubitxcw

 

lan and everyone who replied me

I did not use uBITX manager.
But I have understood that using uBITX manager is essential to set? CW offset and for uBITX.

Now everything has been cleared by setting uBITX manager as follows
? ?- Enabled Adjust CW Frequency
?? - Shift Display Frequency on CWL, CWU Mode

Frequency displayed by uBITX and my ICOM rig is completely same!!
Thank you for your support!!

I have started to promote uBITX in Japan.
English as the language is the one of the big wall for most of Japanese people.
Even for me, this TX -RX frequency issue was hard to find the solution.
So I will make the article on my blog in Japanese about this topics.

73!
Akira
JJ1EPE
Re: Homebrew from scratch #ubitx

Peter Carr
 

Hi Nick,

I will make the final Gerbers available along with all the relevant information to enable the PCB's to be manufactured, I'll also share the circuit diagram and a board overlay in PDF so it can be built.?

Please note;

I used 0.5W resistors (as this is what I had), but from a space point of view it would make a lot more sense to use 0.25W so the components aren't so cramped.?

The Arduino is mounted on headers so it can easily be removed for programming.?

I used the following TOKO colis - KXCA K2036 AAY (with the capacitor removed) for the low pass filter and KANS1508 PAM for the broadcast filter in the receive section.?

The Si5351 board is a standard Arduino board that is readily available - do a google search for "SI5351A Clock Generator Breakout Board".?

The Toroids are mounted on DIL headers along with the diodes for the ring modulators as I found it much easier to do this than try and put them directly on the board.

There is no provision for an electret condenser microphone as I specifically wanted to use a standard 600 ohm dynamic mic.

I'll upload a zip file with all the information in it, hopefully in the next few weeks other commitments permitting!

73's

Peter M0HYT
Re: RFI problem at the encoder switch #ubitx-help

 

Len,
the enclosure is metallic from amateur radio kits in India, so it should be well shielded.
Re: Homebrew from scratch #ubitx

 

Hi Peter.
Will you sell boards? or share Gerbers?

Thanks
Nick VK4PLN
Re: TX frequency? of uBitx at CWL and CWU mode #ubitxcw

 

Micheal

Are you using 1.094 Beta with Nextion LCD?
Version 1.094 with Nextion LCD has not yet implemented this.?
Implemented in version 1.095.? Version 1.095 is now ready for release.
(Supported from Version 1.03 on Character LCD)

I recently posted a video on youtube.?
It is an introduction image of some functions of Version 1.095, but Shifted CW Frequency can be checked.

Please wathc the link below.?From 1:30, you will see what you want.


Ian KD8CEC


2018-07-03 5:10 GMT+09:00 Michael Babineau <mbabineau.ve3wmb@...>:

Ian :?

I did as you suggested within the uBITX Manager :?

?- Enabled Adjust CW Frequency
?- Shift Display Frequency on CWL, CWU Mode

I encoded and wrote to the uBITX and then reset and I see no difference in operation.

Note that I am using your v1.094 beta with the Nextion Display.

With my main radio set to 7.050 Mhz (CWU) the uBITX must still be tuned to 7.049.300 Mhz (700 Hz Sidetone/Offset selected) CWU
in order for each Radio to hear the other, so the Display Frequency on the uBITX is still the RX frequency, not the TX Frequency.

Both radios should display 7.050 Mhz or very close to it.

Cheers

Michael VE3WMB?



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
(my blog)
Re: TX frequency? of uBitx at CWL and CWU mode #ubitxcw

 

Andy
I will check if you send me your uBITX backup file.
You can back up your uBITX settings to a file in uBITX Manager. Send it to me

Simply put, the order is as follows.
Connect -> Read from uBITX -> Decode -> Selected Options for CWL, CWU Shift -> Encode -> Write to uBITX -> Reset uBITX

I used this feature a few months ago, and I'll check it again.

Ian KD8CEC

2018-07-03 13:21 GMT+09:00 Andy V. Borisenko via Groups.Io <rw9rn@...>:

I also do not have a difference.?I did all the changes in uBitx manager.?
+600Hz CWU, -600Hz CWL?from the desired frequency.
v 1.08



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
(my blog)
Re: TX frequency? of uBitx at CWL and CWU mode #ubitxcw

 

JJ1EPE

Maybe it is related to the side tone.?
Check the side tone of ICOM Transceiver and the side tone of uBITX.?
Set ' Shift Display Frequency on CWL, CWU Mode ' in uBITX Manager software.
Probably the error will be reduced.

Thanks
Ian KD8CEC


2018-07-02 17:09 GMT+09:00 <jj1epe@...>:

Hi!

Thank you for your advice and comment.

Firstly, I did not consider that frequency displayed on the commercial rigs is TX frequency even though frequency of uBitx is RX.

But I am still wondering why the difference of frequency between my ICOM transceiver and uBitx is 1.5Hz but not off set .
1.5KHz might be double of 700 or 800 Hz off set.

I think many uBitx user have been making the contact on CWL or CWU?mode by uBitx.
So there is something I have not understood about offset of CW.
I would like to examine the cause of the frequency difference of 1.5KHz.

73!
Akira
JJ1EPE










--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
(my blog)
Re: TX frequency? of uBitx at CWL and CWU mode #ubitxcw

 

Glenn

The latest version is not supported, but can be downloaded from the link below.


It is also briefly described below.


After this Version 1.1, I will post a description of the uBITX Manager program.

Ian KD8CEC

2018-07-02 11:48 GMT+09:00 Glenn Anderson <ve3jau@...>:

Sorry if I'm missing something but is there a "user manual" for the Memory Manager? I've never used it before...

Thanks

On Sun, Jul 1, 2018 at 9:04 PM, Ian Lee <kd8cec@...> wrote:
Michael

I agree with you opinion, yes?There is not enough explanation for them :)
I liked it the first time I implemented this feature.?
So I adopted it as a basic specification. That is, if no setting is made, 'TX' frequency is displayed unconditionally.
However, it is inconvenient for users who are familiar with the existing method.
So I decided to let the user choose by uBITX Manager.

Ian KD8CEC

2018-07-02 9:41 GMT+09:00 Michael Babineau <mbabineau.ve3wmb@...>:
Ian :

Thanks for the reply. I noticed that option in the uBITX Manager but I couldn't find any documentation on what I meant.
Now I know, so I will give it a try.? I am not sure that this will "fix" the issue in switching back and forth between CWU and CWL,
but I will recheck after I try with this option enabled.?

What I have observed is ?that the RX Frequency stays the same when you switch from CWU to CWL, but the TX frequency is changed, which should not
be the case.

Thanks for the clarification.

Cheers

Michael VE3WMB?



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
(my blog)




--
73 de Glenn VE3JAU
Thunder Bay, Ontario



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
(my blog)
Re: RFI from uBitx TX after AGC and other mods installed

 

Thanks guys, Don and I appreciate it.?

Glad to see so much "building enthusiasm".?As of today we're up to 676 AGC kits and/or Click kits ordered?and?shipped.

73 Kees K5BCQ

----------------------------------------------------------------------------------------------------------
New Topic.............
I'm just about ready to make a pass on an OLED display, Nano microcontroller, and 2x AD8307s mWattmeter/SWR device.??So far, it's all mounted on a 50mm x 50mm board
(2x2 or qty 4 on a 100mm panel) including the Stockton bridge, BNC/SMA connectors, Nano, and header attached OLED. Still looking for firmware to run.
?
?
63581 - 63600 of 116829