Date   
Re: uBITX V6 heat sink temperature

Jerry Gaffke
 

I believe Joel is talking about the LM7805 regulator on the Raduino.
The LM7805 is spec'd to continue working at temps as high as 150 C.

I have no idea how hot it should get on a v6 with the new display, but on the older uBitx's
the Raduino typically drew around 60ma from the 12v supply.
So about (12-5)*0.060) = 0.42 Watts dissipated as heat in the LM7805.
They figure the part rises about 19 degrees C per watt to be dissipated above the ambient air,
so 60 C does seem kind of high.  But it's not about to burn up.

Would be interesting to hear reports about how much current the Raduino on a v6 draws.

Some of the Nano's on the Raduino have been found to draw more current than others.
Some uBitx owners felt the LM7805 was way too hot, and put a heatsink on it.
The Raduino should get just as hot during receive as during transmit.

Jerry, KE7ER


On Mon, Dec 30, 2019 at 04:26 PM, Alex Netherton wrote:
Wow, when I have my SB-200 just turned on, it heats the room. When I in a long QSO, I have to open the window!

Warm finals are just a fact of life.If you are running Class B, your duty cycle is 50%, meaning that you are feeding the transistors with 20 to 25 watts, dissipating around 10 watts (or so). This will indeed heat up the heat sink, but most JFETS are rated for such temperatures. If the transistors are biased for Class AB, then you are likely putting close to 30 watts in to get 10 out.
 
Just put a hot dog on top of the finals!
Hide quoted text

 


On Fri, Dec 27, 2019 at 12:11 PM Joel Caulkins/N6ALT <caulktel@...> wrote:
Hi all,

I have my V6 all hooked up and calibrated and have checked into a few nets with my own home brew mic, the supplied one got bad reports, however I have noticed that the 5 volt regulator heat sink is running at 142 degrees F or 61.1 C. That seems hot to me. Anyone else?

Joel
N6ALT

Re: Alternatives to Baofeng mic?

Ken Hansen
 

Is the Baofeng mic giving you bad audio, or would you just prefer a mic that is perceived to be of higher quality?

A microphone is a very simple device, and very basic mics can provide excellent audio (I have heard many great audio reports about the hand mics included with the last few Icom radios - the 7300, the 7610 in particular.), but some people don't like hand mics and prefer other options (boom or desk stand microphones).

Microphones are one of those areas where a Ham can sink a lot of money without meaningfully improving their signal. Many/most new commercial radios have elaborate equalization capabilities, but a basic rig like the uBitx lacks such niceties, opting to focus on functionality, intelligibility, and affordability.

That's my $0.02,

Ken, N2VIP

On Dec 30, 2019, at 18:35, John AE5X <ae5x@...> wrote:

I'm new to the uBITX scene (had a V1 way back) and was wondering what other mics others are using for improved audio over the Baofeng? Or audio mods that improve the tx audio?

Tnx/73,
--
John AE5X
https://ae5x.blogspot.com/

S-Meter on Nextion Display

Richard Spohn
 

Hi, have decided to forge ahead with a v5 and Nextion 3.2 Enhanced,
using KD8CEC's software. I have watched the videos several times, I
understand about loading the CEC firmware for v5 using Xloader, and
about installing the 32_E tft file onto the sdisk, the video makes it
all clear. Question: I see their is an NX_S option, and I do like
the S-Meter. Is this S-meter implemented in the firmware and can I
get it into the Nextion via a raduino pin, or is there a necessary
hardware addition or mod to make before this will work? Thanks - Rich
WB2GXM

Alternatives to Baofeng mic?

John AE5X <ae5x@...>
 

I'm new to the uBITX scene (had a V1 way back) and was wondering what other mics others are using for improved audio over the Baofeng? Or audio mods that improve the tx audio?

Tnx/73,
--
John AE5X
https://ae5x.blogspot.com/

Re: uBITX V6 heat sink temperature

Alex Netherton
 

Wow, when I have my SB-200 just turned on, it heats the room. When I in a long QSO, I have to open the window!

Warm finals are just a fact of life.If you are running Class B, your duty cycle is 50%, meaning that you are feeding the transistors with 20 to 25 watts, dissipating around 10 watts (or so). This will indeed heat up the heat sink, but most JFETS are rated for such temperatures. If the transistors are biased for Class AB, then you are likely putting close to 30 watts in to get 10 out.

Just put a hot dog on top of the finals!


On Fri, Dec 27, 2019 at 12:11 PM Joel Caulkins/N6ALT <caulktel@...> wrote:
Hi all,

I have my V6 all hooked up and calibrated and have checked into a few nets with my own home brew mic, the supplied one got bad reports, however I have noticed that the 5 volt regulator heat sink is running at 142 degrees F or 61.1 C. That seems hot to me. Anyone else?

Joel
N6ALT

Re: How-to Request

Gary Anderson
 

Yes. You are correct. Calibration values are stored in EEPROM. Updating HFsignals firmware will not change these settings. Ian's firmware also uses the same calibration addresses (although he has added more to the memory map)
...I fear I may have inadvertently sparked a question based on one of the posts I made today. I had ported the firmware to an ARM core that does not have EEPROM.  Sorry if this caused confusion.
Rgds,
Gary

Re: nextion 2.8 installation

Erwin Serlé
 

I am just in the process of handling my first Nextion a 3.5 type.

What are you doing with what software when you get the messages here?
The Nextion Editor?
Did you try anything else with it like the examples via the LTS Editor version?

How did you put the tft file one the SD card? What SD card?

The more data the more we can understand what is happening. And try to reproduce your situation.

--
PE3ES - F4VTQ - Erwin
73

Re: How-to Request

Mike W7SQL Ex KD7ZPC
 

Not to hijack the thread, but I have a related question: does updating the firmware affect the alignment? I upgraded mine yesterday, but I did go the download and compile route because I wanted to take a look at the code. 

I suspect it does not, because the alignment values are inserted by the raduino code into EEPROM memory.

is that correct?

~Mike
KD7ZPC

Re: How-to Request

Gary Anderson
 

Ken,
I would recommend buying an inexpensive Nano 'clone' like the one used in the uBITX (you can get them for < USD $4 with shipping included on eBAY from US 'stock')  Buy one without pins soldered.
Go through some Arduino tutorials. Get a LED 'blinky' to work.  Work through the common issues of the CH340 driver installation, realizing you need to use the 'old bootloader' and sometimes issues with the USB connectors.
You will then have the experience to quickly compile and update the firmware as it progresses, plus have a Nano for you other tinker projects and no worries about 'harming' your uBITX while learning.

GitHub download is simple so you don't really need to be fully into that ecosystem.  You need to be mindful that the project needs to be in one folder/directory.
What trips up some folks is that the folder/directory must be named the same as the primary .ino file for the Arduino IDE (thankfully there is now only 1 .ino file! improvements!)
so when you download the zip file it will be named, for example, "ubitxv6-master".  You need to change to match the .ino file. For example to "ubitx_v6.3.1_code" 
(or whatever name you want, as long as it matches)  for me: it would be ubitxv6_3p1 Also deconvoluting hardware and firmware revisions. 
At one time, the zip had nested directories, this appears to be fixed too.

You can upload compiled code directly with avrdude as Laurence does. (Great to have a script document of the command line options, although my ports seem to hop around)
But, having the source allows you to 'see' what is going on and modify to your liking.
avrdude will be a part of the Arduino IDE install.  You can get to it from the command line on a Windows, Apple OSX machine too.  I expect Pi also, but I don't have one.

Rgds,
Gary

Re: How-to Request

Bill
 

Ken,

You may find this short video useful at an introduction to the Arduino family even though it's not specific to the uBITX:
https://www.youtube.com/watch?v=nL34zDTPkcs

- Bill KB3T

On 2019-12-30 11:47, Ken Hansen wrote:
With my new V6 uBitx competed (Latest design, bought with case) I've
seen/heard there were some small software issues, discovered as the
units are tested. I'm not an arduino or github guru, and I suspect
many here are like me - willing to tinker, but this github/arduino
ecosystem is totally new to me.
Does anyone have a link to a document/webpage that outlines the needed steps to:
1) set up a computer to load software onto uBitx,
2) download corrected software (once available),
3) load corrected software onto uBitx,
And 4) perform any needed calibration/alignment once loaded?
I understand updated software is not available yet, But I want to be
ready when it is.
Thanks in advance,
Ken, N2VIP

Re: Need uBITX Memory Manager help?

 

Thanks guys!  This should help...
Cheers,
Jim W0CHL

Re: DC Connector #v6

Jerry Gaffke
 

On v6, it's a series diode included on the PC board, which should be quite safe.
Downside is that you lose a diode drop worth from your power supply.

Older versions of the uBitx recommended placing a reverse diode in parallel with the DC power jack,
so if the external power supply was reversed the diode would conduct and hopefully blow a fuse somewhere.
For this scheme, your criticism is valid, given that no mention was made in the uBitx instructions of needing a fuse.

Reverse protection has been discussed long and hard over the years:
    https://groups.io/g/BITX20/search?q=reverse+protection
Relatively simple to understand, but lots of different ways to do it.
Everybody has an opinion, most of them are right enough.

Lots of posts to the forum over the years from folks who blew up their rig with a backwards supply.
The Raduino is usually toast, as the LM7805 offers no protection (but some other regulators do).
Much of the rest of the rig should probably survive, though never did hear back from anybody
who succeeded in bringing a ubitx back up, detailing what they had to fix.

Jerry, KE7ER


On Mon, Dec 30, 2019 at 09:51 AM, Ian Reeve wrote:
A diode is not ideal as reverse polarity is going to destroy the diode to open circuit so unless there is a suitable quick bow fuse inline,it may not do the job.Always check and double check. I got caught out with a American cb rig with white and white with a black stripe.Assumed the latter was the negative...but no! The rig survived!

Re: DC Connector #v6

Ian Reeve
 

A diode is not ideal as reverse polarity is going to destroy the diode to open circuit so unless there is a suitable quick bow fuse inline,it may not do the job.Always check and double check. I got caught out with a American cb rig with white and white with a black stripe.Assumed the latter was the negative...but no! The rig survived!


From: BITX20@groups.io <BITX20@groups.io> on behalf of Jim Willis <jimwill172@...>
Sent: Monday, December 30, 2019 5:20:43 PM
To: BITX20@groups.io <BITX20@groups.io>
Subject: Re: [BITX20] DC Connector #v6
 
Hi Evan,

Mine is a different P/N.

Before plugging in, I checked the polarity with a DVM, even though the polarity is shown on the case (see photo).



Best regards,

Jim

On Dec 30, 2019, at 11:51 AM, Evan Hand <elhandjr@...> wrote:

Jim,

As stated, not sure where it came from.  Part number is HP 1044A ac/dc converter.  I looked up the part on Google and found it was for an old HP printer.  I did say a computer device.

I guess the one point not made so far in the thread is to tame your excitement and take your time double checking all before applying the power. 

73
Evan
AC9TU

Re: acg/alc

jim
 

For example ???

Jim

On Monday, December 30, 2019, 3:23:12 PM UTC, poikaa3 <poikaarod@...> wrote:


   Looks like what is used in FRS transceivers......  

Re: acg/alc

jim
 

Not the way I see it ...note the contra wound "control winding"  The original note I found had a variable resistor and 2 coupled toroids ...per attached

Jim

On Monday, December 30, 2019, 10:59:41 AM UTC, Gordon Gibby <docvacuumtubes@...> wrote:


Does that work by saturating the toroid?



On Dec 30, 2019, at 01:22, jim via Groups.Io <ab7vf@...> wrote:

So ..ran across this circuit the other day ..thot maybe those who might be looking at alternative agc circuits as well as transmitter alc  might be interested

xmitter alc I would place the circuit at RV1 between Q90>>>Q911/912 and sample the rf at the output trans before the lpf/relay trees ..

Jim
<Antenna Attenuator.jpeg>

Re: DC Connector #v6

Jim Willis
 

Hi Evan,

Mine is a different P/N.

Before plugging in, I checked the polarity with a DVM, even though the polarity is shown on the case (see photo).



Best regards,

Jim

On Dec 30, 2019, at 11:51 AM, Evan Hand <elhandjr@...> wrote:

Jim,

As stated, not sure where it came from.  Part number is HP 1044A ac/dc converter.  I looked up the part on Google and found it was for an old HP printer.  I did say a computer device.

I guess the one point not made so far in the thread is to tame your excitement and take your time double checking all before applying the power. 

73
Evan
AC9TU

Re: DC Connector #v6

Evan Hand
 

Jim,

As stated, not sure where it came from.  Part number is HP 1044A ac/dc converter.  I looked up the part on Google and found it was for an old HP printer.  I did say a computer device.

I guess the one point not made so far in the thread is to tame your excitement and take your time double checking all before applying the power. 

73
Evan
AC9TU

Re: How-to Request

Laurence Oberman
 

I use Linux and avrdude, sharing but may be easier to use the Arduino
GUI if using Windows

I think this may be useful, I wrote it to use it to update firmware
using Linux command line.
Save as program_ubitx.sh or whatever name you want.

--------------------- Snip -----------
#!/bin/bash
# Script to use avrdude on Linux to program HEX file into Ubitx
#Laurence Oberman
# KB1HKO
if [ -z "$1" ]
then
echo "USAGE: ./program_ubitx.sh <fw_name.hex>"
return
exit
fi

fw=$1
### Set your path to avrdude here
### Also ensure you are using the correct ttyUSBx port and that its
access is correct
avrdude="/home/loberman/.arduino15/packages/arduino/tools/avrdude/6.3.0-arduino14/bin/avrdude"
echo "Programming Ubitx with $fw"
$avrdude -C/home/loberman/.arduino15/packages/arduino/tools/avrdude/6.3.0-arduino14/etc/avrdude.conf
-v -patmega328p -carduino -P/dev/ttyUSB0 -b57600 -D -Uflash:w:$fw:i

---------------Snip --------------

On Mon, Dec 30, 2019 at 11:47 AM Ken Hansen <ken@...> wrote:

With my new V6 uBitx competed (Latest design, bought with case) I've seen/heard there were some small software issues, discovered as the units are tested. I'm not an arduino or github guru, and I suspect many here are like me - willing to tinker, but this github/arduino ecosystem is totally new to me.

Does anyone have a link to a document/webpage that outlines the needed steps to:

1) set up a computer to load software onto uBitx,

2) download corrected software (once available),

3) load corrected software onto uBitx,

And 4) perform any needed calibration/alignment once loaded?

I understand updated software is not available yet, But I want to be ready when it is.

Thanks in advance,

Ken, N2VIP


How-to Request

Ken Hansen
 

With my new V6 uBitx competed (Latest design, bought with case) I've seen/heard there were some small software issues, discovered as the units are tested. I'm not an arduino or github guru, and I suspect many here are like me - willing to tinker, but this github/arduino ecosystem is totally new to me.

Does anyone have a link to a document/webpage that outlines the needed steps to:

1) set up a computer to load software onto uBitx,

2) download corrected software (once available),

3) load corrected software onto uBitx,

And 4) perform any needed calibration/alignment once loaded?

I understand updated software is not available yet, But I want to be ready when it is.

Thanks in advance,

Ken, N2VIP

Re: Need uBITX Memory Manager help?

Gary Anderson
 

I dumped the EEPROM when I first got my V3.  As you know, each requires it's own calibration.
This may just get you started:

MASTER_CAL 171500 // 0x00029DEC
SB_CAL 11995250  // 0x00B70872

Rgds,
Gary


/*
EEPROM_HEX_DUMP:
    |   0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F
----------------------------------------------------------
0   |  EC 9D 02 00 FF FF FF FF 72 08 B7 00 FF FF FF FF
10  |  FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
*/
 
 
/**
 * These are the indices where these user changeable settings are stored  in the EEPROM
 */
#ifndef NO_EEPROM // use address
   #define MASTER_CAL 0
   #define LSB_CAL 4
   #define USB_CAL 8
   #define SIDE_TONE 12
   //these are ids of the vfos as well as their offset into the eeprom storage, don't change these 'magic' values
   #define VFO_A 16
   #define VFO_B 20
   #define CW_SIDETONE 24
   #define CW_SPEED 28
#else // use values
   #define MASTER_CAL 171500 // 0x00029DEC
   #define LSB_CAL 0         // ?not used?
   #define USB_CAL 11995250  // 0x00B70872 (would be set by code if out of range to 11997000)
   #define SIDE_TONE 0       // ?not used?
   #define VFO_A 7150000     // default value from orig code
   #define VFO_B 14200000    // default value from orig code
   #define CW_SIDETONE 800   // default value from orig code
   #define CW_SPEED 100      // default value from orig code
#endif