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Re: Are flat top cells compatible with zBitx battery holder or are button tops required?

 

Dear JJ,

Thanks a lot for the quick response. What about the compatibility of the battery box???Are button tops required?

I have never used the flat top cells. That is why this question.

73
Jon, VU2JO

On Fri, Apr 4, 2025 at 8:43?AM JJ - W9JES via <jj=[email protected]> wrote:
Flat Top cells preferred.
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-JJ
Re: zbitx Memory

 

My development system is a zbitx with Raspberry Pi zero 2. It takes a couple of seconds to build zbitx?
- f

On Fri, Apr 4, 2025 at 8:43?AM Ryan Wesolowski via <cosmo1stgen=[email protected]> wrote:
I will be trying zram when I have time.? Much faster than swap but uses cpu cycles.? So far the little I have played memory isn’t much of an issue. We will see what zram does.
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Ryan
kk6dzb
Re: zbitx Memory

 

I will be trying zram when I have time. ?Much faster than swap but uses cpu cycles. ?So far the little I have played memory isn’t much of an issue. We will see what zram does.
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Ryan
kk6dzb
Re: Are flat top cells compatible with zBitx battery holder or are button tops required?

 

Flat Top cells preferred.
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-JJ
Are flat top cells compatible with zBitx battery holder or are button tops required?

 

I was asked this question on zBITX:

"Are flat top cells compatible with the zBitx battery holder or are button tops required? Got my radio on order and want to get some batteries before it arrives. Appreciate your comments."

I know that VU2ESE was using flat top cells as I read it in one of the earlier emails.

73
Jon, VU2JO
Re: zbitx Memory

 

It's an RPi 3B+ with half as much memory - it was selected for the purpose of RUNNING the radio, not building/compiling applications.
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The 300 Meg swap is on the microSD card, not memory, not sure why you mentioned that...
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Ken, N2VIP
Re: zbitx Memory

 

That is exactly what I have been thinking I need to do?
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Leo, AI5II
zbitx stl files

 

the zbitx slt files are now on the github.
- f
Re: zbitx Memory

 

Building applications is always going to be slow on the Zero 2 W. If you have another more capable Raspberry Pi, including the Raspberry Pi 4 in the sBitx, you'll be better off building them there and moving the applications over.


On Thu, Apr 3, 2025 at 10:25?PM Leo Aniol, AI5II via <leomaniolone=[email protected]> wrote:
But that is not doing anything.
300m swap?
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Wait til I run Cqrlog and wsjt-z at the same time.
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Compiles and loading apps take forever and sometimes lock up the system while running?
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Leo, AI5Ii
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Re: zbitx Memory

 

But that is not doing anything.
300m swap?
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Wait til I run Cqrlog and wsjt-z at the same time.
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Compiles and loading apps take forever and sometimes lock up the system while running?
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Leo, AI5Ii
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Re: zbitx Memory

 

I run wsjtx all the time, flawlessly. Run top to see memory and cpu consumption.
- f


On Fri, Apr 4, 2025, 7:50 AM Ken N2VIP via <ken=[email protected]> wrote:
It's only using 272 Megs out of 512 Megs on-board, seems OK to me...
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Ken, N2VIP
Re: zbitx Memory

 

It's only using 272 Megs out of 512 Megs on-board, seems OK to me...
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Ken, N2VIP
Re: CW on zbitx

 

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The link is an article on the history of electronic keyers.? It is quite lengthy but if you read it you will learn a lot.? It seems that with each major product introduction a new subtle or not so subtle difference in timing was also introduced.
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From the article, the major difference between mode A and B is that mode B polls the opposite paddle for a pressed state during the sending of the element and the following element space.? Whereas mode A polls the opposite paddle for a changed of state from not pressed to pressed.? This difference is what prevents mode A from not sending an extra un-keyed element that turns letter K's into C's.
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The current Zbitx code for mode A polls for a pressed state of the opposite paddle same as mode B during the carrier on? period and does not poll at all during the element carrier off period.?? It would be interesting if some of the users who say it works or say it doesn't work would report what mode they use.? I can't see that a Mode A user would have a good time at all with it working mostly as mode B.
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The mode B code still has the bug I pointed out twice that will change a DIT paddle contact to sending an unwanted DAH if the paddle contract is made during the carrier off period.
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? ? ? ? if (cw_mode == CW_IAMBICB){
? ? ? ? ? ? if (cw_next_symbol == CW_IDLE && cw_last_symbol == CW_DOT && (symbol_now & CW_DASH)){
? ? ? ? ? ? ? ? cw_next_symbol = CW_DASH;
? ? ? ? ? ? }
? ? ? ? ? ? if (cw_next_symbol == CW_IDLE && cw_last_symbol == CW_DASH && (symbol_now & CW_DOT)){
? ? ? ? ? ? ? ? cw_next_symbol = CW_DASH;
? ? ? ? ? ? }
? ? ? ? }
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zBitx Battery Cover STL

 

Is available at
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- JJ
zbitx Memory

 

Not a lot of memory to do stuff?
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Leo? AI5II

Screenshot_20250403-214840.png

Re: Does sequence of updates matter?

 

Okay, so I replaced the OTG adapter and now keyboard and mouse are working as they should. I used this one
I am back to a fully working radio again :)
I remain watching the thread on CW updates with keen interest as mine is behaving exactly like AE5X's.
73
Re: Received my zbitx.

 

Looking forward to the case files when you can please Ragav. Thank you
Re: Zbitx power cord connector

 

This is unfortunate. We actually ordered a die to be made for this connector!


On Thu, Apr 3, 2025, 8:01 AM Matt via <rehash_dolor_0b=[email protected]> wrote:
My plug failed on like the third start. I ordered this and they transmit power fine (one to replace the failed plug and one for the power supply), but they’re slightly longer. A very small o-ring would take up the space if that’s a concern.?
Re: Waiting for the zBitx to start…

 

In addition to the uSD card, you need to buy a uSD card reader, which can be read via USB and written with a writing program.
Make sure that the USB can be connected to both the PC and zbitx. To the PC when you download the Image, to zbitx when you want to make a backup.
Since the published Image is in .zip format, you have to unpack it first, which is 32GB in size here.
It may happen that during production, the 32 GB SD card cannot be written to, because the new card is a few bytes smaller than the Image.
That is why you may have to buy a 64 GB card.
If the creator of the Image is more skilled, he will remove the empty part of the card using the shrink method, and the Image could be much smaller.
It is advisable to buy a good quality uSD card, which can also be used for Backup.
Don't worry, if you insert a 64GB uSD into the device, you can copy it to a smaller size than Backup using Raspberry->Menu->Accessories->SD Card Copier.
It is advisable to make a Backup, if you have successfully set the .ini files, you can use the Backup to restore in case of an error.
--
Gyula HA3HZ
zBITx Power Plug Intermittant

 

The only thing Which jumped out at me was a highly intermittent power cable between the batteries and the unit which was supplied by HF Signals. Rotate the connector or barely touch the cable and it would recycle power. I replaced it with a new 5.5mm outer barrel and 2.1mm inner barrel cable and it now works fine and is very stable.
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The new cable has a full 360 degree "tube/barrel" to make GOOD contact with the center pin in the female connector,?the original does not....take a look at it.?
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Great Little Radio?
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73 Kees K5BCQ
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