Date   

Re: #v5 #power issue #power #v5

 

My boards have worked continuously on 15V with no issues. The power output
increases, you only need to put a heat sink on Raduino 5V regulator as it gets
uncomfortably hot. It may then drop voltage.

If the board has 2822 audio amp then put a 9 or 10 78L09 or 10 in series with
chip supply. This mod is documented.

Trace power on the board and find what is happening.

Raj


At 25/06/2020, you wrote:
Another mystery!

I power my uBitx v5 with a LiFePo 3.5Ah battery from Bioenno. It's a new battery but a little while back, the radio stopped powering up. Long story short, the battery was found to have a bad BMS (battery mgt system). The only symptom that I might have needed to pay more attention to before the radio failed was that the battery put out a little more than the 13.8v that nominal 12v systems typically do. My VOM is analog but it looked to be between 14 and 15v.


Re: DEFECTIVE RADUINO FOR V5

 

How have you concluded that it is defective?

At 24/06/2020, you wrote:
IS IT POSSIBLE TO RETURN THE DEFECTIVE RADUINO THAT WAS SUPPLIED WITH MY V5 DAVE C GW0NVF


Re: has the supply chain for the uBITX been affected by the covid-19

Support HF Signal
 

Hello Dave C,

We have asked you in your post (IS IT POSSIBLE TO RETURN THE DEFECTIVE RADUINO THAT WAS SUPPLIED WITH MY V5    DAVE C  GW0NVF https://groups.io/g/BITX20/topic/75067622#80043) to send us the details of your order ID, Date of Purchase(Paypal Transaction ID) and the Serial number of the board and the Raduino.to sales@...  and we shall ask the technical team to look into this.

Thanks and Regards,

Thomas
--
Support@...


Re: Power supply

Mike WA0YCN
 

I have one of these installed in my uBitx case.  Works great. 


https://www.amazon.com/dp/B00MF70BPU/ref=emc_b_5_t


--
Mike
WA0YCN


Re: uBitX assembled: bit of a challenge with alignment/bfo adj - Volume/switch knob fix

McRuss
 

I finally got the case and antenna adapter for my V6 and figured out how to do the calibration (from the video).  But I had the same issue, problems with getting to the set-up menu.  Once I did get to it but then it seemed be locked and I couldn't get out without a 'cold boot.'  After a number of failures, I realized what the problem was:  the tuning knob was TOO FAR in on the shaft (opposite problem from the volume knob) and wouldn't go in far enough to activate the set-up menu.  I was then able to go in and do the calibration but I'm not sure the frequency setting is right.  I found an AM station, set it to the correct freq and then tuned to zero beat.  But....zero beat was not where the station audio was the clearest.  I listened to the video again and it seems to me zero beat there was not at the clearest audio either.  So that is what I went with.  Will have to wait a week or so before I can get back on during the day and play with it more.

Russ
K5FJR


Re: #v5 #power issue #power #v5

Jerry Gaffke
 

Could indeed be a defect in both the Biennio BMS and in the uBitx, as you suspect.

Very weird that the uBitx works (for awhile) with the Biennio, but not with a bench 12v supply.
You could be right that something in the uBitx needs an the extra volt or two
that the fully charged Biennio offers, but not the bench supply.
That would explain why the BIennio only works for awhile, until the cell voltage drops some.
The Raduino regulator is the first place I'd look.

Good luck!

Jerry, KE7ER


On Wed, Jun 24, 2020 at 01:47 PM, Tim Helming wrote:
Hi Jerry et al
 
The other sources I’ve tried are plenty beefy—the 30A supply I use for my home station (incl Kenwood TS-590s) and some 30Ah AGMs with full charges. Current draw isn’t our culprit. 
 
I’ll try measuring the voltage directly at the regulator—not sure why I hadn’t already thought of that. I doubt it is thermal protection cutout because I’ve tried to power on the rig from dead cold from the 30A supply. Also, when the LiFePo cuts out and I “reset” it, the radio comes right back to life. 
 
Not sure about the BMS. I can’t imagine that I did anything to hurt it, and it did work ok for a while. Never charged it with anything but the charger it came with. I suspect it had a lurking factory defect—a component that was almost dead and then did die once it was put into service. 
 
I’ll reply again when I’ve taken some measurements off the voltage regulator. 
 
Tim


Re: #v5 #power issue #power #v5

Tim Helming
 

Hi Jerry et al

The other sources I’ve tried are plenty beefy—the 30A supply I use for my home station (incl Kenwood TS-590s) and some 30Ah AGMs with full charges. Current draw isn’t our culprit. 

I’ll try measuring the voltage directly at the regulator—not sure why I hadn’t already thought of that. I doubt it is thermal protection cutout because I’ve tried to power on the rig from dead cold from the 30A supply. Also, when the LiFePo cuts out and I “reset” it, the radio comes right back to life. 

Not sure about the BMS. I can’t imagine that I did anything to hurt it, and it did work ok for a while. Never charged it with anything but the charger it came with. I suspect it had a lurking factory defect—a component that was almost dead and then did die once it was put into service. 

I’ll reply again when I’ve taken some measurements off the voltage regulator. 

Tim



On Jun 24, 2020, at 12:28, Jerry Gaffke via groups.io <jgaffke@...> wrote:

Tim,

Hmmm, radio only powers up when tied to a big battery capable of supplying several amps,
not when powered from a wimpy 1 or 2 amp 12v supply?
Check current consumption into the uBitx when receiving, should be under a half amp.
Is something getting hot when you power the rig from the big battery?
If the rig is drawing more current than the Bionenno is designed to deliver, the BMS circuit
will shut the rig down.

Maybe try powering an 1157 type incandescent tail light from the battery, see if that behaves?
That's about 0.66 amps on the tail light filament, about 3 amps on the brake light filament.

I haven't looked much at the v6, but I assume the voltage regulator you refer to 
is something like an LM7805 on the raduino.  What is the voltage going into this regulator
when it is failing?   If it's over 7 or 8 volts, it should be doing just fine.
It is possible that the regulator overheats and goes into shutdown (till it cools off)
if the battery voltage is too high or if there is an inadequate heatsink on that regulator.

That BIoenno battery probably has four LiFePO4 cells, from  
    https://www.robotshop.com/media/files/pdf/hyperion-99v-2100mah-lifepo4-transmitter-pack-datasheet.pdf
>  Each LiFePO4 cell has a NOMINAL voltage of 3.3V. A fully charged LiFePO4 cell is 3.6V, and a fully depleted LiFePO4 cell is 2.5V. 

So nominally 3.3*4=13.2volts,  fully charged 3.6*4=14.4volts,  discharged:  2.5*4=10volts

The Bionenno datasheet says the charging voltage maxes out at 14.6volts:
  https://cdn.shopify.com/s/files/1/0219/0154/files/BLF-1220A_User_Manual_rev_04_23_2019.pdf?209

Those are open circuit voltages, when drawing current the internal resistance of the battery will
bring that voltage down a bit.  You will seldom see exactly 12.0 volts out of that battery.

I am curious what symptoms were seen to verify that the BMS of the Bioenno was failing.
And curious why it failed, as that should provide pretty much full protection from abuse.
From the manual:
>    Protection: PCM/BMS Overcharge, overdischarge, overcurrent, temperature, balancing

Was the battery perhaps charged by something other than a Bioenno provided charger
prior to the BMS failure?

Jerry, KE7ER


Re: #v5 #power issue #power #v5

Jerry Gaffke
 

Tim,

Hmmm, radio only powers up when tied to a big battery capable of supplying several amps,
not when powered from a wimpy 1 or 2 amp 12v supply?
Check current consumption into the uBitx when receiving, should be under a half amp.
Is something getting hot when you power the rig from the big battery?
If the rig is drawing more current than the Bionenno is designed to deliver, the BMS circuit
will shut the rig down.

Maybe try powering an 1157 type incandescent tail light from the battery, see if that behaves?
That's about 0.66 amps on the tail light filament, about 3 amps on the brake light filament.

I haven't looked much at the v6, but I assume the voltage regulator you refer to 
is something like an LM7805 on the raduino.  What is the voltage going into this regulator
when it is failing?   If it's over 7 or 8 volts, it should be doing just fine.
It is possible that the regulator overheats and goes into shutdown (till it cools off)
if the battery voltage is too high or if there is an inadequate heatsink on that regulator.

That BIoenno battery probably has four LiFePO4 cells, from  
    https://www.robotshop.com/media/files/pdf/hyperion-99v-2100mah-lifepo4-transmitter-pack-datasheet.pdf
>  Each LiFePO4 cell has a NOMINAL voltage of 3.3V. A fully charged LiFePO4 cell is 3.6V, and a fully depleted LiFePO4 cell is 2.5V. 

So nominally 3.3*4=13.2volts,  fully charged 3.6*4=14.4volts,  discharged:  2.5*4=10volts

The Bionenno datasheet says the charging voltage maxes out at 14.6volts:
  https://cdn.shopify.com/s/files/1/0219/0154/files/BLF-1220A_User_Manual_rev_04_23_2019.pdf?209

Those are open circuit voltages, when drawing current the internal resistance of the battery will
bring that voltage down a bit.  You will seldom see exactly 12.0 volts out of that battery.

I am curious what symptoms were seen to verify that the BMS of the Bioenno was failing.
And curious why it failed, as that should provide pretty much full protection from abuse.
From the manual:
>    Protection: PCM/BMS Overcharge, overdischarge, overcurrent, temperature, balancing

Was the battery perhaps charged by something other than a Bioenno provided charger
prior to the BMS failure?

Jerry, KE7ER


Re: #v5 #power issue #power #v5

Dale Parfitt
 

Hi Tim,

It is a simple procedure to measure the output of the regulator and see whether it is nominal  or not. A 7805CV is rated as max input (from memory) of around 25V.  Let us know what you find.

 

Dale W4OP

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of wt1im@...
Sent: Wednesday, June 24, 2020 2:51 PM
To: BITX20@groups.io
Subject: [BITX20] #v5 #power issue

 

Another mystery!

I power my uBitx v5 with a LiFePo 3.5Ah battery from Bioenno. It's a new battery but a little while back, the radio stopped powering up. Long story short, the battery was found to have a bad BMS (battery mgt system). The only symptom that I might have needed to pay more attention to before the radio failed was that the battery put out a little more than the 13.8v that nominal 12v systems typically do. My VOM is analog but it looked to be between 14 and 15v. 

With the LiFePo out of commission, I thought, no problem, I have lots of 12v sources. 

NONE of them would power up the radio. All verified good power sources that work fine on other things, test well, etc.

Meanwhile, the fellow ham who diagnosed the BMS issue charged my LiFePo by bypassing its BMS and using an external one. 

With the LiFePo back, it, and *only* it, will power the radio. But not for long, due to the BMS issues (I'm going to get a new BMS)--it cuts the voltage to zero. I can "reset" it by momentarily connecting it to a charger. Not a viable solution, just part of the troubleshooting chain. 

I do notice that the LiFePo shows 12v now--not the higher voltage it was showing before all of this happened.

My best guess is that the voltage regulator in the uBitx is bad, and will only power the rig with a very narrow range of voltages. The LiFePo is the only DC source I have handy that delivers less than 13.8v. 

I have read that the uBitx "wants" 12v or less. But the symptoms of running it with a bit more seem to be things like distorted RX audio. I haven't seen anyone say that 13.8v actually kills the radio. 

My best guess is that the 7805cv voltage regulator is bad It's not fully dead since I can get the rig to turn on with (only) the LiFePo, but perhaps it's gravely injured. Maybe the 14-15v that the LiFePo originally delivered fried it? Is my best next step to replace the regulator and see what happens? 

And--if 13.8+v really did kill this regulator, does it make sense to swap it with another part that can accept slightly higher voltages? I really am hoping I don't have to do deeper hacking on the power supply system to drop the voltage below 13.8 since that is such a universal DC voltage. A swap-in regulator replacement would be ideal. 

Thanks in advance!

Tim


#v5 #power issue #power #v5

Tim Helming
 

Another mystery!

I power my uBitx v5 with a LiFePo 3.5Ah battery from Bioenno. It's a new battery but a little while back, the radio stopped powering up. Long story short, the battery was found to have a bad BMS (battery mgt system). The only symptom that I might have needed to pay more attention to before the radio failed was that the battery put out a little more than the 13.8v that nominal 12v systems typically do. My VOM is analog but it looked to be between 14 and 15v. 

With the LiFePo out of commission, I thought, no problem, I have lots of 12v sources. 

NONE of them would power up the radio. All verified good power sources that work fine on other things, test well, etc.

Meanwhile, the fellow ham who diagnosed the BMS issue charged my LiFePo by bypassing its BMS and using an external one. 

With the LiFePo back, it, and *only* it, will power the radio. But not for long, due to the BMS issues (I'm going to get a new BMS)--it cuts the voltage to zero. I can "reset" it by momentarily connecting it to a charger. Not a viable solution, just part of the troubleshooting chain. 

I do notice that the LiFePo shows 12v now--not the higher voltage it was showing before all of this happened.

My best guess is that the voltage regulator in the uBitx is bad, and will only power the rig with a very narrow range of voltages. The LiFePo is the only DC source I have handy that delivers less than 13.8v. 

I have read that the uBitx "wants" 12v or less. But the symptoms of running it with a bit more seem to be things like distorted RX audio. I haven't seen anyone say that 13.8v actually kills the radio. 

My best guess is that the 7805cv voltage regulator is bad. It's not fully dead since I can get the rig to turn on with (only) the LiFePo, but perhaps it's gravely injured. Maybe the 14-15v that the LiFePo originally delivered fried it? Is my best next step to replace the regulator and see what happens? 

And--if 13.8+v really did kill this regulator, does it make sense to swap it with another part that can accept slightly higher voltages? I really am hoping I don't have to do deeper hacking on the power supply system to drop the voltage below 13.8 since that is such a universal DC voltage. A swap-in regulator replacement would be ideal. 

Thanks in advance!

Tim


Re: ubitxv6 mic not working fine #ubitxv6

KB9WOO
 

Are you putting batteries in that power mic?

--
Mark, kb9woo
Milwaukee, WI uBITX v6


Re: IF shift needed for listening correctly V4 UBITX #bitx20help

andrea@...
 

the firmware version is correct. 

I can think that it is mostly related to a missing calibration.
I overwrite the firmware directly on the original nano but as you wrote this shouldn't affect the data in the eeprom. I also used the KD8CEC software manager for donwloading the data. The calibration settings are acccessible from the software?
In any case I think i'll go for calibration procedure as soon 

Thank you for the references.
Ciao
Andrea


Re: uBitX assembled: bit of a challenge with alignment/bfo adj - Volume/switch knob fix

Richard West <rewest71@...>
 

You're right, Gordon. Thank you.


Re: Beta Readers, closed!

Jack, W8TEE
 

Rob:

I don't know what happened to them.

Jack, W8TEE

On Wednesday, June 24, 2020, 12:02:43 AM EDT, Robert Campbell <kg6hum@...> wrote:


Jack,

Did those developers move over to Volkswagen after Aztec shut down?

--
Rob Campbell
KG6HUM


On Tue, Jun 23, 2020, 10:20 AM Jack, W8TEE via groups.io <jjpurdum=yahoo.com@groups.io> wrote:
I remember Aztec C. Byte Magazine always used to benchmark C compilers and one of the tests was The Sieve of Eratosthenes. There were about a dozen C compilers in the tests, including mine, and while Aztec was so-so on most tests, it beat everyone on the Sieve test. It was later found out that they wrote a section in their compiler that could recognize the test code and, instead of compiling it, dumped out hand-tweaked assembler code for it. They pretty much died after that was discovered. I think they are also the only company that used -1 for NULL.

After that, there were a bunch of benchmark tests that use the Drystone and Whetstone benchmark tests. The problem with both of those tests is that they really didn't test the code generation of the compiler, but rather the implementation of the Standard C library function calls used in the tests. As a result, I wrote the Dhamstone (get it?) benchmark test ("Philosophy and Methodology of Benchmarks", Computer Language, Feb., 1986) as a better benchmark for testing code generation. Running that benchmark serious scrambled the test results!

Jack, W8TEE

On Tuesday, June 23, 2020, 1:04:33 PM EDT, Tom Frobase <tfrobase@...> wrote:


Jack,

 had your book on my shelf next to "K&R" and "Learning to Program in C".    We were using Astec "C"in those days with a $500 removable 10 Meg hard drive.  My staff always told me my favorite programming language was solder! ha ha ... tom, N3LLL

On Tue, Jun 23, 2020 at 9:39 AM Jack, W8TEE via groups.io <jjpurdum=yahoo.com@groups.io> wrote:
I don't think any author thinks he can reach every potential reader successfully. But to say you've never read a single book that helped you seems unlikely. Indeed, to me it says that they aren't doing any combing of the book reviews before they buy, or they have unrealistic goals about reading a book. Also, I know that students who read the book and do the exercises will learn more than those who don't. For those, like yourself, who have a reading disability, perhaps they would be better served with a video or some other medium. Jeff makes it seem like he keeps buying books even though his mind is made up that they don't work for him. That seems like the repeat-the-same-experiment-and-expect-different-results problem. Simple solution for Jeff: Quit buying books.

Jack, W8TEE

On Tuesday, June 23, 2020, 10:22:16 AM EDT, Christopher Miller <djmalak2k6@...> wrote:


I think Jeff makes a good point. I personally have a reading disability. Writing a book for everyone is impossible.

Chris 

--
Jack, W8TEE


--
Jack, W8TEE


--
Jack, W8TEE


Re: Power supply

Dean Souleles
 


Re: Power supply

Bill Cromwell
 

Hi Dean,

I don't homebrew batteries. That would involve handling more hazardous materials than I would be comfortable. I homebrew the maintenance and charging gear. My approach is not entirely unique but some of my implementations might be close to unique in some cases. I am pretty sure other people - not necessarily hams - use the same methods. It is just too obvious. Additionally, methods from the past seem to be lost to younger people who can't be bothered to read those useless *olde* books from the 70s or 80s. Never mind about "prewar" (WW2) publications. We all know the laws of physics are completely different now <evil grin>. You might have a look at a charger for small batteries that use a series light bulb to accomplish a tame, tapered charge. Somebody here already mentioned the series bulb. Search on "lightbulb battery charger". It might be a good place to start and pretty safe too.

73,

Bill KU8H

bark less - wag more

On 6/23/20 11:39 PM, Dean Souleles wrote:
Bill -
100% with you on homebrew rigs.  I've spent the last few months building a 100% scratch built 40 meter SSB transceiver, and I have learned a ton along the way.  I've been documenting it on my blog- check out kk4das.blogspot.com if you have a few minutes.   But I will admit homebrewing batteries is outside of my area of interest.
73,
Dean
KK4DAS


Re: Power supply

MVS Negi
 

Could you give a bit more detail on the batteries and a link if possible? I was looking for a lightweight reasonably priced battery and to use a solar panel to charge them on my trips to the hills.
Mahendra
VU2MNX

On Tue, Jun 23, 2020 at 7:07 PM Dean Souleles <dsouleles@...> wrote:
Bob - 

If you are interested in Lithium batteries the Talentcells are inexpensive and light-weight.  I used a Velcro strap to put on inside my uBitx case.  It weighs about 6 ounces and runs the uBitx all day long.   The 6 Amp hour version is now only $35 - with charger.  For me, at those prices its not worth spending any time to build anything. 

Lead acid batteries are so 20th century. :)

Dean
KK4DAS


Re: uBitX assembled: bit of a challenge with alignment/bfo adj - Volume/switch knob fix

Evan Hand
 

Please review the following video before you do the calibration.  As is stated in this thread, it is very easy to get it wrong, and then can be difficult to get it back to working.

Since you have determined that it is off frequency, here is how Ashhar Farhan suggests recalibrating:
https://www.youtube.com/watch?v=t6LGXhS4_O8

73
Evan
AC9TU 


Re: uBitX assembled: bit of a challenge with alignment/bfo adj - Volume/switch knob fix

MVS Negi
 

I tried that, nothing happens...Checked with my friends on the Air, I find the freq out by different amount on different Bands. It is disconcerting. The receiver is pretty good though. 
Thanks

On Wed, Jun 24, 2020 at 1:04 PM Reed N <greenkid336600+groupsio@...> wrote:
Mahendra,

With the stock software, you need to press and HOLD for ~10 seconds before the menu will come up. Then you can adjust your oscillator cal to zero beat.


Reed


Re: DEFECTIVE RADUINO FOR V5

Support HF Signal
 

Hello Dave,

Kindly let us know the order ID, Date of Purchase and the Serial number of the board and the Raduino. Do send us a mail on sales@... and send us the required details.

Thanks and Regards,

Thomas
--
Support@...

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