Date   
Re: Audio AVC

James Lynes
 

Well since Atmel is now Microchip they are probably having problems rationalizing bigger Atmels vs. PIC32s vs. Me-too ARMs vs. RPIs.

The chipKIT and Fubarino boards are nice(digilentinc.com).

James

Re: Audio AVC

Jack, W8TEE
 

Still, there's a large base they could tap into. However, the uC32 resources (512K flash, 32K SRAM, 80MHz clock) for $35 doesn't even come close to the competition. Just makes no sense to me.

Jack, W8TEE

On Tuesday, April 23, 2019, 9:38:22 AM PDT, James Lynes <jmlynesjr@...> wrote:


Well since Atmel is now Microchip they are probably having problems rationalizing bigger Atmels vs. PIC32s vs. Me-too ARMs vs. RPIs.

The chipKIT and Fubarino boards are nice(digilentinc.com).

James

Re: uBitX For Sale #ubitx

Jerry Gaffke
 

Sold already.

SC    Apr 21   

This radio kit and case are SOLD.  Thank you for your interest.  It is going to a good home.  Bill, WB4ME




On Tue, Apr 23, 2019 at 09:01 AM, Martin KM6TCD wrote:
Is this assembled and tested or still in kit form?

Re: uBitX For Sale #ubitx

Mike Wilson
 

Hi Jerry,

 

I have a version 3 kit for sale if you are interested.

 

Mike

VE3WMJ

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Jerry Gaffke via Groups.Io <jgaffke@...>
Sent: Tuesday, April 23, 2019 12:49:07 PM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitX For Sale #ubitx
 
Sold already.

SC    Apr 21   

This radio kit and case are SOLD.  Thank you for your interest.  It is going to a good home.  Bill, WB4ME




On Tue, Apr 23, 2019 at 09:01 AM, Martin KM6TCD wrote:
Is this assembled and tested or still in kit form?

Re: uBitX For Sale #ubitx

Mike Wilson
 

Opps, should have been replying to Martin!

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Mike Wilson <ve3wmj@...>
Sent: Tuesday, April 23, 2019 1:05:03 PM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitX For Sale #ubitx
 

Hi Jerry,

 

I have a version 3 kit for sale if you are interested.

 

Mike

VE3WMJ

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Jerry Gaffke via Groups.Io <jgaffke@...>
Sent: Tuesday, April 23, 2019 12:49:07 PM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitX For Sale #ubitx
 
Sold already.

SC    Apr 21   

This radio kit and case are SOLD.  Thank you for your interest.  It is going to a good home.  Bill, WB4ME




On Tue, Apr 23, 2019 at 09:01 AM, Martin KM6TCD wrote:
Is this assembled and tested or still in kit form?

Adding SOTABEAMS LASERBEAM-VARI Digital Variable Audio f\Filter Module to Your BITX/uBITX

Dennis Zabawa
 

I have developed an Arduino sketch for the SOTAEAMS Vari-filter which includes a nice display.  It utilizes a USB Nano V3.0 ATmega328 16M 5V Micro-controller CH340G board, or similar, available from Amazon and other sources and an OLED display module such as the HiLetgo 1.3" IIC I2C Serial 128x64 SSH1106 OLED LCD Display LCD Module for Arduino AVR PIC, or similar. I am happy to share this but cannot offer any support - so please do not contact me.

You can download the sketch and a schematic, in PDF, from the SOTABEAMS website: DOWNLOAD

Dennis KG4RUL

Re: Audio AVC

Ismo Väänänen OH2FTG
 

People seem to have tried I2C controlled digital AGC before, with TPA2016 amplifier.
Nick VK4PP seems to have had success with it.
https://groups.io/g/BITX20/topic/9586139
https://www.adafruit.com/product/1712

So digital AGC via I2C control is very much possible.

Re: [BITX40] uBitX For Sale #ubitx

Bob Lunsford <nocrud222@...>
 

I have a 40M Bitx for sale. Is in a box with no sides or top, only front and back.

Seems to work but am convinced it needs programming download which I am not prepared to do. Unmodified...

Will sell for $25 plus shipping from E KY.

Let me know if interested to my email address below.

Bob — KK5R
Nocrud222(at)yahoo(dot)com

Re: audio oscillation #ubitx-help

radiomanyo@...
 

Hello to the Group !

I have the same problem.I built the uBitx V3 from scratch.First I thought that I have ground loops ,but doesn't solve the problem. After many days of research I noticed that if I disconnect the BFO signal from the mainboard the oscillation stops.In this condition I can go with the vol potentiometer to 100% and no oscillation. Now comes the mistery part : with disconnected BFO if I short D5 pins 1 and 3 the audio oscillates again. Remark : I am using 1N4148's for all mixers.
By shorting as above, practically I connect one winding of T7 and T6 through R115 to the ground and to the input of the audio chain . I think that T6 or T7 a responsible for picking up some audio radiated from the TDA2822 output. I used even a screened cable to the speaker. Maybe the pick up is on the mainboard. The layout is similar to KMK version.
The only idea at this moment is to use binocular TV balun cores for T7 and maybe for T6.

I ask like Andy ANY IDEAS ??
YO6PO, Zoli

Re: Audio AVC

Jerry Gaffke
 

At $10 for a 2.8W class D audio amp operating from 5v, that looks nice.
Here's what the webpage says:
    I2C interface pins for setting gain, AGC configuration parameters, etc. 
 
So you would use the i2c interface when setting the volume or turning on AGC.
But the AGC action all happens internally to this board once you have set it up.
You don't need to constantly write to it via the i2c interface to make AGC happen.

Apparently worked for Nick.
But be careful with Class D amps.  They send high frequency square waves
out to the speaker, and if not filtered correctly that can be very noisy in a radio.

Jerry, KE7ER 



On Tue, Apr 23, 2019 at 10:13 AM, Ismo Väänänen OH2FTG wrote:
People seem to have tried I2C controlled digital AGC before, with TPA2016 amplifier.
Nick VK4PP seems to have had success with it.
https://groups.io/g/BITX20/topic/9586139
https://www.adafruit.com/product/1712

So digital AGC via I2C control is very much possible.

Re: wiring up a cw paddle ref 54899 #bitx20

Mike Short
 

If you reverse the wiring on your paddle do you get dahs?

Re: Audio AVC

Dexter N Muir
 

If Class-D output is a problem, perhaps the pre-amp/processor could feed a conventional o/p stage? Or is that much available alone as a chip?
73 de ZL2DEX

Re: uBitX For Sale #ubitx

Sam Tedesco
 

I'm interested if it's unbuilt. Whatcha want for it?

Re: Audio AVC

Tom, wb6b
 

On Tue, Apr 23, 2019 at 09:38 AM, James Lynes wrote:
Well since Atmel is now Microchip
I have the PICKit 4 Programmer/Debugger and now that Atmel is under Microchip the new PICKit 4 box will program PIC, AVR and ARM chips. Although I also have an Atmel ICE to fall back on when the PICKit does not handle a particular AVR chip. They are gradually merging their toolsets to handle PIC/AVR/ARM chips more seamlessly. So Microchip may cover all the bases.

The Nordic chips are interesting. When it comes to battery operation, some folks seem to prefer these. I bough a LoRa development module based on one of these chips. I use manufacture toolsets often, but the documentation from the LoRa development board is helter skelter. 

I'm learning more about these chips, as I ended up buying a genuine Nordic development board, a J-Link Programmer/Debugger and installed the Segger toolchain, so I have a known starting point before tackling the Lora board (and disorganized documentation) again. The Segger stuff is first class (fortunately it is supposed to be free to use with Nordic chips), but even with experience on multiple manufactures toolchains, culling through the many disconnected documents and connecting the dots, is making this toolchain one of the longest for me to get set up with. 

If Nordic chips get more support in the Arduino IDE it would be a real benefit to the casual user. I Like the ease of Arduino IDE with the consistent libraries and the (at least most of the time) just works programming environment. For the Arduino environment it might be good if they try supporting the inexpensive ST-Link V2 clone programmers to program boot loaders into the Nordic chips. 

Tom, wb6b


Re: wiring up a cw paddle ref 54899 #bitx20

Kelly Mabry
 

No.  i am currently working  on the fix. More info soon.
73,
Kelly K5AID 

Re: wiring up a cw paddle ref 54899 #bitx20

Kelly Mabry
 

Update!! Success! But not without a casualty. I cut the speaker trace by accident, but i wired point to point to fix it. So now all i need do is plug the keyer paddle in and go!  

Note this is needed to be done only if you are using one of the amateurradiokits.in cases. This was good practice for the AGC from kit-projects.com but i'm scared to install it. Lol. I shook so much and i only have a cheap dremel knock off with one speed....high! But the switch is in my case, all i need to figure out is "how to drop it in"

73 for now...

Kelly K5AID 

Re: Audio AVC

Jack Brabham - KZ5A
 

I like the TPA2016.    I've been using a 15W/ch class D amp to drive my main station speakers for 2 or 3 years and haven't noticed any RF noise.

One aspect of the uBitx AGC consideration I haven't heard much on is.... to what extent, if any, do strong signals outside of the recovered audio pass band, but inside the 45 or 12 mhz passbands affect the mixers and amps in the RX chain?   Is there an optimum max signal level?

73 Jack KZ5A








On 4/23/2019 5:30 PM, Tom, wb6b wrote:
On Tue, Apr 23, 2019 at 09:38 AM, James Lynes wrote:
Well since Atmel is now Microchip
I have the PICKit 4 Programmer/Debugger and now that Atmel is under Microchip the new PICKit 4 box will program PIC, AVR and ARM chips. Although I also have an Atmel ICE to fall back on when the PICKit does not handle a particular AVR chip. They are gradually merging their toolsets to handle PIC/AVR/ARM chips more seamlessly. So Microchip may cover all the bases.

The Nordic chips are interesting. When it comes to battery operation, some folks seem to prefer these. I bough a LoRa development module based on one of these chips. I use manufacture toolsets often, but the documentation from the LoRa development board is helter skelter. 

I'm learning more about these chips, as I ended up buying a genuine Nordic development board, a J-Link Programmer/Debugger and installed the Segger toolchain, so I have a known starting point before tackling the Lora board (and disorganized documentation) again. The Segger stuff is first class (fortunately it is supposed to be free to use with Nordic chips), but even with experience on multiple manufactures toolchains, culling through the many disconnected documents and connecting the dots, is making this toolchain one of the longest for me to get set up with. 

If Nordic chips get more support in the Arduino IDE it would be a real benefit to the casual user. I Like the ease of Arduino IDE with the consistent libraries and the (at least most of the time) just works programming environment. For the Arduino environment it might be good if they try supporting the inexpensive ST-Link V2 clone programmers to program boot loaders into the Nordic chips. 

Tom, wb6b



First ubitx lsb contact!

Kelly Mabry
 

Got my first contact with my little low power radio; AD4PF, Billy in Dyersburg TN 7.155.4 mhz my dial said 7.153.767
By the way, around 175m between Brinkley AR and Dyersburg, TN
Yahoo! 
What a great day!
73, 
Kelly K5AID 

Re: First ubitx lsb contact!

Gigabyte
 

Congrats!


On Tue, Apr 23, 2019, 19:41 Kelly Mabry <kmabry2007@...> wrote:
Got my first contact with my little low power radio; AD4PF, Billy in Dyersburg TN 7.155.4 mhz my dial said 7.153.767
By the way, around 175m between Brinkley AR and Dyersburg, TN
Yahoo! 
What a great day!
73, 
Kelly K5AID 

Re: Audio AVC

William R Maxwell
 

No issue with being considered a fossil but I really want to delay becoming a fossil!