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Re: Brand new uBiTX v5.0 quality issue ?

 

Hi Ashhar, I agree with you.
I also wrote a serious email to hfsignals attaching several photos but they haven't given me any answer yet..

73's Diego
Re: Brand new uBiTX v5.0 quality issue ?

 

Couple of boards with me with broken pot leads.

If the pots are mounted a little higher above the pcb then they can be twisted without problem.

Raj

At 17/12/2019, you wrote:

i am treating this as a serious quality issue. have others faced this too? by twisting the trimpots, the tracks can potentially come off. please write to hfsignals@... and ask for a replacement.

- f

On Tue, Dec 17, 2019 at 3:32 AM Mike WA0YCN < mgassman@...> wrote:

Diego,

I got my board in early November and my trimmer was skewed as well. I presume they turned it like that because they changed heat sinks and the new ones go closer to the pc board than previous ones.?? Regardless, I haven?€?t experienced any problems.?

Just curious - my family is from Nervesa - where might you call home?

Mike

Re: Brand new uBiTX v5.0 quality issue ?

 

Hi Mike, thanks a lot for infos !?
Therefore it seems that it is only an aesthetic issue. it's not very nice to look at but if it works, that's okay.

I'm from Reggio Calabria, my city is right in front of Sicily island, in southern Italy. Nervesa is located in the north, about 1200km (780 miles) away.

73's Diego
Re: Brand new uBiTX v5.0 quality issue ?

 

i am treating this as a serious quality issue. have others faced this too? by twisting the trimpots, the tracks can potentially come off. please write to hfsignals@... and ask for a replacement.

- f

On Tue, Dec 17, 2019 at 3:32 AM Mike WA0YCN <mgassman@...> wrote:

Diego,

I got my board in early November and my trimmer was skewed as well. I presume they turned it like that because they changed heat sinks and the new ones go closer to the pc board than previous ones.? Regardless, I haven¡¯t experienced any problems.?

Just curious - my family is from Nervesa - where might you call home?

Mike
Re: Nextion question from new member

 

Almost. R253 replaced by a 0.1 Mfd cap.

Philip G7JUR
Re: Nextion question from new member

 

Rick

The display choice indeed is a large factor in case selection. Use your favorite search engine to query ubitx enclosure,? and check out what's being used. I am using a case from amateurradiokits.in that many are happy with.

Your v5 is nice, no must buys required. Choose your display and go from there. I suggest powering up with the stock display first.

Curt
Re: Brand new uBiTX v5.0 quality issue ?

 

Diego,

I got my board in early November and my trimmer was skewed as well. I presume they turned it like that because they changed heat sinks and the new ones go closer to the pc board than previous ones. ?Regardless, I haven¡¯t experienced any problems.?

Just curious - my family is from Nervesa - where might you call home?

Mike
Re: ?BITX & QRP labs 50W PA

 

Farhan,

No its not.? You need to be more than 100ma to get sorta on the linear part of the IRF510 bias curves.

At minimum bias you are on the very curved part of the gate threshold curve and the IMD will be poor with
crossover distortion.? Also we are not switching as its linear from transistor to transistor its complementary.
?
---------------------------------
No direct email, it goes to bit bucket due to spam
Re: uBitx FT8

V Zecchinelli
 

¿ªÔÆÌåÓý

Thanks Jerry,

I purchased from HF Signals website.? Board says 948/4.? I also have a V3 labeled 0705/3.? The silkscreen on both boards says ubitx v3 (c) hfsigs.com, 2017.? On the V3 I had removed the WX chip and installed a socket and TDA2822M.? I disassembled the V3 to use the case for what I thought was a V5.

Thank you,

Vince


On 12/16/2019 3:31 PM, Jerry Gaffke via Groups.Io wrote:

A v4 with a TDA2822 chip driving the speaker/phones is still a bit confusing.

v3 had the TDA2822
v4 had a couple discrete transistors in push-pull.
v5 has the LM386

Did you buy directly from hfsignals.com on Aug 12 2019?
Or some other vendor?

Jerry, KE7ER




On Mon, Dec 16, 2019 at 12:18 PM, V Zecchinelli wrote:
Jerry, Sarma, Gordon,

Wow, am I confused.? I purchased 12 August 2019 and I thought it was a V5 however after Jerry's response I looked and it is a V4.? My bad for not checking things better.? Live and learn.

I am using a stereo cable I bought on ebay cheap.? After your responses I decided to check the 3.5mm connectors to see if there could be a short there.? Well, there are only 2 wires in the cable and shield and ring are connected together.? Lesson, don't buy cheap cables on ebay.? I will order some quality stereo cables from Amazon and see how things go.

Thank you so much for your responses.

Vince
Re: uBitx FT8

 

A v4 with a TDA2822 chip driving the speaker/phones is still a bit confusing.

v3 had the TDA2822
v4 had a couple discrete transistors in push-pull.
v5 has the LM386

Did you buy directly from hfsignals.com on Aug 12 2019?
Or some other vendor?

Jerry, KE7ER




On Mon, Dec 16, 2019 at 12:18 PM, V Zecchinelli wrote:
Jerry, Sarma, Gordon,

Wow, am I confused.? I purchased 12 August 2019 and I thought it was a V5 however after Jerry's response I looked and it is a V4.? My bad for not checking things better.? Live and learn.

I am using a stereo cable I bought on ebay cheap.? After your responses I decided to check the 3.5mm connectors to see if there could be a short there.? Well, there are only 2 wires in the cable and shield and ring are connected together.? Lesson, don't buy cheap cables on ebay.? I will order some quality stereo cables from Amazon and see how things go.

Thank you so much for your responses.

Vince
Re: uBitx FT8

V Zecchinelli
 

¿ªÔÆÌåÓý

Jerry, Sarma, Gordon,

Wow, am I confused.? I purchased 12 August 2019 and I thought it was a V5 however after Jerry's response I looked and it is a V4.? My bad for not checking things better.? Live and learn.

I am using a stereo cable I bought on ebay cheap.? After your responses I decided to check the 3.5mm connectors to see if there could be a short there.? Well, there are only 2 wires in the cable and shield and ring are connected together.? Lesson, don't buy cheap cables on ebay.? I will order some quality stereo cables from Amazon and see how things go.

Thank you so much for your responses.

Vince


On 12/16/2019 12:46 PM, Gordon Gibby wrote:

Are you DC shorting out the output with a transformer in the sound card??


On Dec 16, 2019, at 12:07, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

I'd guess your USB soundcard cabling is somehow (almost) shorting out the audio from that 2822 chip.
Look for a short.
Perhaps add an 8 or 10 ohm resistor in series with the TDA2822 to protect it from shorts like that.

The TDA2822 amp was used on v3.
Some discrete transistors were used on v4.
On v5, as Sarma has stated, the trusty (crusty?) old LM386 was used.

If you have a TDA2822 chip installed, it is probably v3.
A search of the forum for 2822 will reveal that a few v3 uBitx boards went out
with a WX branded TDA2822.? This clone of the TDA2822 works fine up to about 8v,
above 8v it can sometimes self destruct.? ?If you have a WX branded TDA2822 on
your board, I suggest you get an NJM2073D ordered from a reputable distributor
It is pin compatible with the TDA2822, works fine, good to 15v or so.

The original TDA2822 in the DIP package from ST is no longer available,
though ST does still sell it in an SOIC.
There are a half dozen different makers of clone TDA2822's, many of them work fine.

Some of the clones work ok but only with a maximum supply voltage of around 6v.
With the WX TDA2822 clone operating at 12v in the uBitx, the chip might work fine
for weeks and then suddenly decide to blow bits of silicon across the room.


A fun bit of trivia from?
? "The LM386 was invented by Ernie Leroy Long at Motorola in 1969. It was originally for part of a fuel injection system for a Ford Car."

If true, I assume it went by a different name at the time.
I'm a bit suspicious, a google for "LM386 Ernie" gets many copies of exactly the above phrase with no further information or attribution.
The "LM" prefix suggests National Semiconductor, perhaps it had a different name coming out of Motorola.

Jerry, KE7ER
?

On Mon, Dec 16, 2019 at 07:10 AM, V Zecchinelli wrote:

Good Morning,

I have a quick question on FT8 with uBitx V5 using USB soundcard (7.1 Channel).? Even with the volume of uBitx set very low the 2822 audio amp gets very hot and if volume set over 1/4 it will fail catastrophically.? On phone I can listen to the radio all day with no issues.? Seems odd.? Anyone else seen this problem?

Thanks,
Vince
Re: Brand new uBiTX v5.0 quality issue ?

 

Hi Skip, thank you so much for your precious advice!
Diego, I8TIF
Re: uBitx FT8

 

¿ªÔÆÌåÓý

Are you DC shorting out the output with a transformer in the sound card??


On Dec 16, 2019, at 12:07, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

I'd guess your USB soundcard cabling is somehow (almost) shorting out the audio from that 2822 chip.
Look for a short.
Perhaps add an 8 or 10 ohm resistor in series with the TDA2822 to protect it from shorts like that.

The TDA2822 amp was used on v3.
Some discrete transistors were used on v4.
On v5, as Sarma has stated, the trusty (crusty?) old LM386 was used.

If you have a TDA2822 chip installed, it is probably v3.
A search of the forum for 2822 will reveal that a few v3 uBitx boards went out
with a WX branded TDA2822.? This clone of the TDA2822 works fine up to about 8v,
above 8v it can sometimes self destruct.? ?If you have a WX branded TDA2822 on
your board, I suggest you get an NJM2073D ordered from a reputable distributor
It is pin compatible with the TDA2822, works fine, good to 15v or so.

The original TDA2822 in the DIP package from ST is no longer available,
though ST does still sell it in an SOIC.
There are a half dozen different makers of clone TDA2822's, many of them work fine.

Some of the clones work ok but only with a maximum supply voltage of around 6v.
With the WX TDA2822 clone operating at 12v in the uBitx, the chip might work fine
for weeks and then suddenly decide to blow bits of silicon across the room.


A fun bit of trivia from?
? "The LM386 was invented by Ernie Leroy Long at Motorola in 1969. It was originally for part of a fuel injection system for a Ford Car."

If true, I assume it went by a different name at the time.
I'm a bit suspicious, a google for "LM386 Ernie" gets many copies of exactly the above phrase with no further information or attribution.
The "LM" prefix suggests National Semiconductor, perhaps it had a different name coming out of Motorola.

Jerry, KE7ER
?

On Mon, Dec 16, 2019 at 07:10 AM, V Zecchinelli wrote:

Good Morning,

I have a quick question on FT8 with uBitx V5 using USB soundcard (7.1 Channel).? Even with the volume of uBitx set very low the 2822 audio amp gets very hot and if volume set over 1/4 it will fail catastrophically.? On phone I can listen to the radio all day with no issues.? Seems odd.? Anyone else seen this problem?

Thanks,
Vince
Re: STM32F769-FT8-Transceiver

 

Charles



Begun the build process. I have downloaded all the info from github. Would
you mind sharing some pics of back of your build. The video shows the front
but I need a visual of the back side also



73

Art N2ajo



From: [email protected] <[email protected]> On Behalf Of Charles Hill
Sent: Monday, December 9, 2019 8:32 AM
To: [email protected]
Subject: [BITX20] STM32F769-FT8-Transceiver



Well I finally gotten the
<>
STM32F769-FT8-Transceiver project to a state worth releasing.

I have placed the files required for making the project on Github at this
location: <>


I hope you enjoy the project.

Regards,

Charley

winmail.dat
winmail.dat

Re: uBitx FT8

 

Thanks Jerry.

If the OP? used mono 3.5 male pin in to the 35 stereo sockt, i am sure the short citcuit created between sleeve and one channel.of audio ( on ring) will kill the audio amplifier.?
Instead? he should use a stereo pin wand use one channel. Infact tip and ring of the socket are looped.?
I expect the OP? to comeout of the scensrio unserwhich this failure is happenong on v5 board!!!!

Sarma vu3zmv


On Mon, 16 Dec 2019, 10:37 pm Jerry Gaffke via Groups.Io, <jgaffke=[email protected]> wrote:

I'd guess your USB soundcard cabling is somehow (almost) shorting out the audio from that 2822 chip.
Look for a short.
Perhaps add an 8 or 10 ohm resistor in series with the TDA2822 to protect it from shorts like that.

The TDA2822 amp was used on v3.
Some discrete transistors were used on v4.
On v5, as Sarma has stated, the trusty (crusty?) old LM386 was used.

If you have a TDA2822 chip installed, it is probably v3.
A search of the forum for 2822 will reveal that a few v3 uBitx boards went out
with a WX branded TDA2822.? This clone of the TDA2822 works fine up to about 8v,
above 8v it can sometimes self destruct.? ?If you have a WX branded TDA2822 on
your board, I suggest you get an NJM2073D ordered from a reputable distributor
It is pin compatible with the TDA2822, works fine, good to 15v or so.

The original TDA2822 in the DIP package from ST is no longer available,
though ST does still sell it in an SOIC.
There are a half dozen different makers of clone TDA2822's, many of them work fine.

Some of the clones work ok but only with a maximum supply voltage of around 6v.
With the WX TDA2822 clone operating at 12v in the uBitx, the chip might work fine
for weeks and then suddenly decide to blow bits of silicon across the room.


A fun bit of trivia from?
? "The LM386 was invented by Ernie Leroy Long at Motorola in 1969. It was originally for part of a fuel injection system for a Ford Car."

If true, I assume it went by a different name at the time.
I'm a bit suspicious, a google for "LM386 Ernie" gets many copies of exactly the above phrase with no further information or attribution.
The "LM" prefix suggests National Semiconductor, perhaps it had a different name coming out of Motorola.

Jerry, KE7ER
?

On Mon, Dec 16, 2019 at 07:10 AM, V Zecchinelli wrote:

Good Morning,

I have a quick question on FT8 with uBitx V5 using USB soundcard (7.1 Channel).? Even with the volume of uBitx set very low the 2822 audio amp gets very hot and if volume set over 1/4 it will fail catastrophically.? On phone I can listen to the radio all day with no issues.? Seems odd.? Anyone else seen this problem?

Thanks,
Vince
Re: uBitx FT8

 

I'd guess your USB soundcard cabling is somehow (almost) shorting out the audio from that 2822 chip.
Look for a short.
Perhaps add an 8 or 10 ohm resistor in series with the TDA2822 to protect it from shorts like that.

The TDA2822 amp was used on v3.
Some discrete transistors were used on v4.
On v5, as Sarma has stated, the trusty (crusty?) old LM386 was used.

If you have a TDA2822 chip installed, it is probably v3.
A search of the forum for 2822 will reveal that a few v3 uBitx boards went out
with a WX branded TDA2822.? This clone of the TDA2822 works fine up to about 8v,
above 8v it can sometimes self destruct.? ?If you have a WX branded TDA2822 on
your board, I suggest you get an NJM2073D ordered from a reputable distributor
It is pin compatible with the TDA2822, works fine, good to 15v or so.

The original TDA2822 in the DIP package from ST is no longer available,
though ST does still sell it in an SOIC.
There are a half dozen different makers of clone TDA2822's, many of them work fine.

Some of the clones work ok but only with a maximum supply voltage of around 6v.
With the WX TDA2822 clone operating at 12v in the uBitx, the chip might work fine
for weeks and then suddenly decide to blow bits of silicon across the room.


A fun bit of trivia from?
? "The LM386 was invented by Ernie Leroy Long at Motorola in 1969. It was originally for part of a fuel injection system for a Ford Car."

If true, I assume it went by a different name at the time.
I'm a bit suspicious, a google for "LM386 Ernie" gets many copies of exactly the above phrase with no further information or attribution.
The "LM" prefix suggests National Semiconductor, perhaps it had a different name coming out of Motorola.

Jerry, KE7ER
?


On Mon, Dec 16, 2019 at 07:10 AM, V Zecchinelli wrote:

Good Morning,

I have a quick question on FT8 with uBitx V5 using USB soundcard (7.1 Channel).? Even with the volume of uBitx set very low the 2822 audio amp gets very hot and if volume set over 1/4 it will fail catastrophically.? On phone I can listen to the radio all day with no issues.? Seems odd.? Anyone else seen this problem?

Thanks,
Vince
Re: bitx v6 is here

 

I managed to download the v6 code from github.com/afarhan a couple days ago.
Today I no longer see the v6 code

I assume it has been removed while a bug or two gets fixed,
and a new version will be posted when it's ready.

Jerry, KE7ER



On Mon, Dec 16, 2019 at 01:40 AM, Matt 9V1MH / VK3AMH wrote:
Hi Farhan

I went to the link for the v6 code??

however the underlying URL to that text is?

if i change the v5 to v6 i.e.?

github says page not found??

v6 also does not appear in any of the repositories listed

cheers

Matt
Re: Raduino - what do I need to update (and learn to update) it?

 

The original Arduino Nano has an FTDI FT232 chip on it for translating USB communications
from you computer into UART TX and RX signals that the ATMEGA328P processor can understand.
? ??
? ??

The $3 Nano clone that comes on the Raduino from HFSignals has the CH340 chip on it, not the FT232.
? ??
? ??
? ??
Under Ubuntu Linux, software drivers for both chips are already present, and communication to the Nano over the USB cable just works.
I am quite happy with using the Arduino IDE under Linux.

As I recall, under Windows the FT232 driver is present, but the CH340 drive is not.
You will have to download the CH340 software driver from the web to your Windows machine
before it will talk over the USB cable to a CH340 Nano clone.

On a Mac, it is possible to get either chip to work, but some people have had trouble.
I am not entirely sure what the issues were, should be up on our wiki.


The FT232 chip was the standard for years and years.
There have been fake FT232 chips, and FTDI's driver decided to brick any fake FT232 chips
to keep the FTDI help lines from being deluged by people with FT232 clone chips that didn't work.
Probably not an issue anymore, as anything much under $20 has moved to the CH340.

Nothing like this has ever come up with the CH340 chips.
The CH340 chips work just fine.
Though I suspect there are malware laden CH340 driver downloads to be had if you look hard enough.

Jerry, KE7ER


On Mon, Dec 16, 2019 at 06:34 AM, Jack, W8TEE wrote:
Many use the CH340 driver instead of the "true" Arduino driver.
Re: uBitx FT8

 

Version 5 used lm386. It is expected to withstand 12v.?
If you are ging much higher, pl reduce to 12v.

On Mon, 16 Dec 2019, 8:41 pm V Zecchinelli, <n1vin@...> wrote:
Good Morning,

I have a quick question on FT8 with uBitx V5 using USB soundcard (7.1 Channel).? Even with the volume of uBitx set very low the 2822 audio amp gets very hot and if volume set over 1/4 it will fail catastrophically.? On phone I can listen to the radio all day with no issues.? Seems odd.? Anyone else seen this problem?

Thanks,
Vince

uBitx FT8

V Zecchinelli
 

Good Morning,

I have a quick question on FT8 with uBitx V5 using USB soundcard (7.1 Channel).? Even with the volume of uBitx set very low the 2822 audio amp gets very hot and if volume set over 1/4 it will fail catastrophically.? On phone I can listen to the radio all day with no issues.? Seems odd.? Anyone else seen this problem?

Thanks,
Vince
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