Date   

a new application of morse code #off_topic

Mark Muller
 

That was amazing, Allard! I will be passing that on to some friends.

Thanks for sharing that with us!  N5KNG


Variable IF

Mark Muller
 

Hi Tom,

Is it possible for you to provide a sketch of the circuit, so we can be sure to understand what you've done and get it right when we hook it up on the board?

If not, then perhaps a little more detail on the connections to the pot, RX and TX voltages, 4.7k voltage control resistors, and 510k bleeder resistor?

I think this would be a fantastic addition to the uBitx operation - thank you for posting!


Re: Should we adopt the KD8CEC firmware?

Ashhar Farhan
 

Dear Konstantinos,

We need about 4 months of lead time to change the circuitry, given the lead times for the PCBs, availability of the SMD pick and place, etc. Instead, we are looking at what we can achieve with the base hardware. It is a software that will be available to everybody who has a ubitx as 'cost-free' upgrade (that is, it won't need you to modify the radio in anyway).

- f

On Mon, May 14, 2018 at 10:38 AM, Konstantinos Konstas <constantine170@...> wrote:
Ashhar,

I am fully in favor of Dr. Lee's software and developments.
When I first got uBitx and fired it up, I was fully disappointed with the poorness of its firmware.
Just to mention the stock Split operation. I am sure more fellow users will agree with me.
Frankly speaking, it is thanks to CEC software that I decided to keep uBITx and play with it.
Memory Manager is a very useful tool, especially if you come to things like the S-meter calibration or the recovery of factory calibration that has been added in version 1.075
I do share some of the concerns of the published responses about the size and perhaps the too many features, but I am convinced about Dr. Lee's ingenuity and I am sure he can come up with a good start up version that can be helpful to beginners and  feature upgradeable.
Also if I may suggest, please consider using an I2C LCD that leaves a certain number of ports free for further experimentation and use. The cost of a I2C adapter for the LCD is minimal and I am sure you can purchase the I2C ready LCD cheaper.  A 20 by 4  LCD would make uBITx more attractive marketing-wise.

Konstantinos, SV1ONW



Re: Should we adopt the KD8CEC firmware?

W2CTX
 

I do not see any issues with the EEPROM.  Everyone protects the first 32 bytes as "stock" delivered

from factory.  All calibration routines place new values there.  Maybe the factory should store a copy

of the delivered calibration up the top of EEPROM.  Each  developer's firmware uses the EEPROM as they

need it.  That is accepted.



rOn

On May 14, 2018 at 9:04 AM "Jerry Gaffke via Groups.Io" <jgaffke@...> wrote:

It will be easier to switch between different firmware if there's an easy way
to set different offsets to the EEPROM address region each flavor of firmware uses. 

For example, Farhan's stock firmware takes 32 bytes, starting at EEPROM address 0.
We could make it 32 bytes starting at EEPROM address 0x124 as follows:


#define EEPROM_OFFSET  0x124

#define MASTER_CAL (EEPROM_OFFSET + 0)
#define LSB_CAL (EEPROM_OFFSET + 4)
#define USB_CAL (EEPROM_OFFSET + 8)
...

Firmware should give an easy way to initialize that EEPROM region to default values. 
There's a total of 1024 bytes of EEPROM available in the ATMega328P.

Jerry


Re: WANTED VK3YE LED LDR AGC diagram

skreblins00@...
 

Hello folks,

could anyone describe where to connect those wires form the AGC circuit to the BITX40 pcb? Photos would also help a lot.
I just got mine BITX40 recently and now I'm in the process of modifying it. AGC is next mod I would like to do.

Thanks in advance.

Stjepan, 9A3DSU

73


Re: How to change the default power-on 7.150 MHz frequency on µBITX

docame12@...
 

Ha! I was wondering what happened. I must have done this by accident as well! Thanks!


Re: UBITX Assembly Wiki Page #ubitx

K9HZ <bill@...>
 

Except you forgot the switch!


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton - J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com


email:  bill@...

 


On May 14, 2018, at 7:22 AM, MAX <max@...> wrote:

Someone asked for a better schematic.  Ask and ye shall receive.

 

I don’t know how to insert an attachment directly into the text body of the email.  You will have to click on it to open it.

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of MAX
Sent: Monday, May 14, 2018 6:59 AM
To: BITX20@groups.io
Subject: Re: [BITX20] UBITX Assemly Wiki Page #ubitx

 

That’s the best one yet.

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of K9HZ
Sent: Sunday, May 13, 2018 10:39 PM
To: BITX20@groups.io
Subject: Re: [BITX20] UBITX Assemly Wiki Page #ubitx

 

There is a really trivial solution to this reversing diode-fuse thing.  My drawing is awful but you get the idea…  You just need a 50 cent 10A 12V relay. 

 

<image002.jpg>

 

 

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com

Like us on Facebook! <image003.png>

 

Moderator – North American QRO Group at Groups.IO.

 

email:  bill@...

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Sunday, May 13, 2018 10:08 PM
To: BITX20@groups.io
Subject: Re: [BITX20] UBITX Assemly Wiki Page #ubitx

 

A search for 'reverse polarity" in this forum shows dozens of hits since the uBitx was released in early Dec.
Here's a few of mine:
  https://groups.io/g/BITX20/message/35353
  https://groups.io/g/BITX20/message/39877

  https://groups.io/g/BITX20/message/44499

I've given up trying to right that particular absurdity.

Unfortunately, we have hundreds of new hams with no fuse (or too big of one)
assuming they are protected when they are not.  
And some of them are bound to be a bit too careless as a result.
 
Jerry


On Sun, May 13, 2018 at 07:23 pm, ajparent1/KB1GMX wrote:

One small point. 

If your using diode for reverse polarity protection it is better to place the
fuses BEFORE the diode as then the fuse blows and the diode is less
likely to be fried and also down stream circuits.


Allison

<uBITX Reverse Polarity Protect.gif>


Re: UBITX Assembly Wiki Page #ubitx

ajparent1/KB1GMX <kb1gmx@...>
 

That is my favorite reverse power protection circuit.  
I add a kickback diode across the coil as diodes are cheap.

Allison


Re: Should we adopt the KD8CEC firmware?

Jerry Gaffke
 

It will be easier to switch between different firmware if there's an easy way
to set different offsets to the EEPROM address region each flavor of firmware uses. 

For example, Farhan's stock firmware takes 32 bytes, starting at EEPROM address 0.
We could make it 32 bytes starting at EEPROM address 0x124 as follows:


#define EEPROM_OFFSET  0x124

#define MASTER_CAL (EEPROM_OFFSET + 0)
#define LSB_CAL (EEPROM_OFFSET + 4)
#define USB_CAL (EEPROM_OFFSET + 8)
...

Firmware should give an easy way to initialize that EEPROM region to default values. 
There's a total of 1024 bytes of EEPROM available in the ATMega328P.

Jerry


Re: uBitX PA @ 24V? #ubitx

ajparent1/KB1GMX <kb1gmx@...>
 

Why?

I believe the answer is yes, but cooling is still an issue and the higher power is barely twice.

That said I have a backup amp that runs a pair of IRF510s at 28V that has proven reliable
though the heat sink is nearly as large as the uBitx board.  Nominal power with 1W of drive
is about 50W on 80 and 40 dropping to 37W on 10M.  

That said the driver stage does not provide more power as it runs at nominal 12V (dont try 24!)
so the increase in power is driver power limited.


Allison


Re: UBITX Assembly Wiki Page #ubitx

MAX <max@...>
 

Someone asked for a better schematic.  Ask and ye shall receive.

 

I don’t know how to insert an attachment directly into the text body of the email.  You will have to click on it to open it.

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of MAX
Sent: Monday, May 14, 2018 6:59 AM
To: BITX20@groups.io
Subject: Re: [BITX20] UBITX Assemly Wiki Page #ubitx

 

That’s the best one yet.

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of K9HZ
Sent: Sunday, May 13, 2018 10:39 PM
To: BITX20@groups.io
Subject: Re: [BITX20] UBITX Assemly Wiki Page #ubitx

 

There is a really trivial solution to this reversing diode-fuse thing.  My drawing is awful but you get the idea…  You just need a 50 cent 10A 12V relay. 

 

 

 

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com

Like us on Facebook! facebook icon

 

Moderator – North American QRO Group at Groups.IO.

 

email:  bill@...

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Sunday, May 13, 2018 10:08 PM
To: BITX20@groups.io
Subject: Re: [BITX20] UBITX Assemly Wiki Page #ubitx

 

A search for 'reverse polarity" in this forum shows dozens of hits since the uBitx was released in early Dec.
Here's a few of mine:
  https://groups.io/g/BITX20/message/35353
  https://groups.io/g/BITX20/message/39877

  https://groups.io/g/BITX20/message/44499

I've given up trying to right that particular absurdity.

Unfortunately, we have hundreds of new hams with no fuse (or too big of one)
assuming they are protected when they are not.  
And some of them are bound to be a bit too careless as a result.
 
Jerry


On Sun, May 13, 2018 at 07:23 pm, ajparent1/KB1GMX wrote:

One small point. 

If your using diode for reverse polarity protection it is better to place the
fuses BEFORE the diode as then the fuse blows and the diode is less
likely to be fried and also down stream circuits.


Allison

 

Image removed by sender.

Virus-free. www.avg.com


Re: Should we adopt the KD8CEC firmware?

Daniel Conklin <danconklin2@...>
 

I like features of both.  I have found it to be a simple process to load either one when I want.  One possibility someone may be able to implement is an on-board micro SD card reader and the ability to load settings to and from that.


Re: UBITX Assemly Wiki Page #ubitx

MAX <max@...>
 

That’s the best one yet.

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of K9HZ
Sent: Sunday, May 13, 2018 10:39 PM
To: BITX20@groups.io
Subject: Re: [BITX20] UBITX Assemly Wiki Page #ubitx

 

There is a really trivial solution to this reversing diode-fuse thing.  My drawing is awful but you get the idea…  You just need a 50 cent 10A 12V relay. 

 

 

 

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com

Like us on Facebook! facebook icon

 

Moderator – North American QRO Group at Groups.IO.

 

email:  bill@...

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Sunday, May 13, 2018 10:08 PM
To: BITX20@groups.io
Subject: Re: [BITX20] UBITX Assemly Wiki Page #ubitx

 

A search for 'reverse polarity" in this forum shows dozens of hits since the uBitx was released in early Dec.
Here's a few of mine:
  https://groups.io/g/BITX20/message/35353
  https://groups.io/g/BITX20/message/39877

  https://groups.io/g/BITX20/message/44499

I've given up trying to right that particular absurdity.

Unfortunately, we have hundreds of new hams with no fuse (or too big of one)
assuming they are protected when they are not.  
And some of them are bound to be a bit too careless as a result.
 
Jerry


On Sun, May 13, 2018 at 07:23 pm, ajparent1/KB1GMX wrote:

One small point. 

If your using diode for reverse polarity protection it is better to place the
fuses BEFORE the diode as then the fuse blows and the diode is less
likely to be fried and also down stream circuits.


Allison

 

Image removed by sender.

Virus-free. www.avg.com


Re: Bitx40 turning clicks #bitx40

fvinnerlid@...
 

Hi Marco
I just upgraded and Yes that solved most of my problems.
Very little clicking and overall better performance.Thank for pointing me inthe right direction
Frank


Re: UBITX Assemly Wiki Page #ubitx

W7PEA
 

Thanks David, but I'm looking for pics of the Microphone or the Key jack.

This is a vanilla install kids. I'll add a note about adding a fuse in the power line. Or yo know it is a wiki... hint hint. I run my power supply into a RIGrunner 4004U. 

West Mountain Radio RR/4004/USB - West Mountain Radio RIGrunner DC Outlet Panels

KJ6ETL... good suggestions! I'll see how we can make it easier on the eyes.

Thanks everyone.
W7PEA


Re: UBITX Assemly Wiki Page #ubitx

kj6etl
 

THANKS!
Can you please upload a higher resolution version of the diagram?
Also the yellow wire is very hard to see against the white backgrond. Perhaps a darker yellow or a light grey background?


Re: uBitX PA @ 24V? #ubitx

kj6etl
 

I prepared my uBitx for it by wiring up a double throw switch.


Re: Should we adopt the KD8CEC firmware?

Konstantinos Konstas
 

Ashhar,

I am fully in favor of Dr. Lee's software and developments.
When I first got uBitx and fired it up, I was fully disappointed with the poorness of its firmware.
Just to mention the stock Split operation. I am sure more fellow users will agree with me.
Frankly speaking, it is thanks to CEC software that I decided to keep uBITx and play with it.
Memory Manager is a very useful tool, especially if you come to things like the S-meter calibration or the recovery of factory calibration that has been added in version 1.075
I do share some of the concerns of the published responses about the size and perhaps the too many features, but I am convinced about Dr. Lee's ingenuity and I am sure he can come up with a good start up version that can be helpful to beginners and  feature upgradeable.
Also if I may suggest, please consider using an I2C LCD that leaves a certain number of ports free for further experimentation and use. The cost of a I2C adapter for the LCD is minimal and I am sure you can purchase the I2C ready LCD cheaper.  A 20 by 4  LCD would make uBITx more attractive marketing-wise.

Konstantinos, SV1ONW


Re: PA breaking into oscillation? (uBitx)

Mike
 

Update:

Did more experimenting . . . problem goes away when bypassing output filters/relays. Connecting antenna directly to pin 5 of T11 works perfectly - gives me 10W key down at 7.050mhz, and about 15W PEP at 7.200mhz on SSB. Bobby dazzler!

The relays I'm using are branded "HUI KE" HK19F, physically and electrically identical to the VRS2H. They look kinda beat-up, but appear to be not used.
Best thing to do is just replace them . . . they're sealed anyway.

I still may need to re-route my RF out path . . . I'll post another update.

-Mike


Re: can I bypass the CP2102 chip on the NANO with an FTDI based serial adapter? #arduino #cp2102 #ftdi #nano

Clark Martin
 

You could try forcing the USB chip into the reset state by holding the reset\ line low (FT232RL - pin 19, CP2102 - pin 9).  Test it out by connecting a 100 ohm resistor from ground to the reset pin.  The resistor should pull down any pull up resistor but not short out the supply if Vcc is tied directly to the pin.  it shouldn’t hurt anything to try this but it might keep something from working.

Doing this MAY turn off the clock.  It should certainly reduce noise induced on the power supply lines.

If it does work you could add a jumper so you could still use the serial port when needed.

Clark Martin
KK6ISP

On May 13, 2018, at 6:38 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

Should work fine.
Note that the Nano has an FT232RL USB-to-serial chip that includes a 5v to 3.3v regulator. 
This currently powers the si5351 through the Nano's J2 pin 14.  On the clones, it's CH340 chip.
    https://www.arduino.cc/en/uploads/Main/Arduino_Nano-Rev3.2-SCH.pdf

You will need to replace that regulator with something else if you remove our CH340 chip.
This new 3.3v regulator could be mounted on the Raduino board.

Jerry


On Sun, May 13, 2018 at 06:21 pm, Nick VK4PLN wrote:
I was wondering something similar, to remove the USB section of the Arduino Nano to clean up any birdies caused by it.. thoughts?