I've been playing around with a PCB design that uses a mosfet for reverse polarity protection.? Diodes burn a decent amount of power, this mosfet is significantly less.? It also has over volt protection, and esd/transient protection, and fused.?
I need to stare at the inside of the box to see if there's a way to work it into the box, but I think that's going to be a bit more involved than just making it a dongle/pig tail design.
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Show quoted text
PS another diode the other way round feeding a small buzzer
gives an audible alarm if the power is upside down :-) !!!!!
On Sun, Sep 15, 2024 at 02:58 PM, Gareth Evans wrote:
> Another approach which I have not seen proposed is to
> switch the power to the radio with a relay with
> contacts of suitable current handling.
>
> The relay coil is fed by a diode so only comes in
> when the power is of the correct polarity.
>
> The advantage coming through the relay contacts
> is that there is no voltage drop save for the
> miniscule resistance of the relay contacts.
>
>
> On Sat, Sep 14, 2024 at 09:34 PM, Dean Souleles wrote:
> > Reverse diode and a fuse is all I use on any of my projects. Total cost
> about
> > $0.50. Voltage drop equal zero.
> >
>
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This code will also work on the raspi pico, went to a fast mcu for better perfomance,
?
the virtual machine ie there for develoment.
?
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so I have 2m and 6m code emulations , I have to add in memory storage , but I figure I would share what I have done. its more basic as mine will be for sota/pota and I dont seen the need for alot.?
https://wokwi.com/projects/409109084148115457
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Richard,
I just found time to put the circuits together. I am more like a magazine editor than a writer. Plus, my business experience has allowed us to assemble a very low cost radio manufacturing unit. Talk about being in the right place at the right time.
My rant was out of curiosity alone. I am not sure I would want to run a large business. Been there, done that. It is uninteresting and very taxing, at least for me.
...which is why I am still a member of this group, and have collected a number of agc kits, one of which will be installed in the v5. I think I may have bought a nextion display too. Just sayin', in a perfect world, we all would have the time and energy to tinker with an sbitx. And I repeat, you are one of my heroes.--Rich. Richard, The comparable radio with the Xeigu is the ubitx. It is completely usable out of the box. We do, offer replacements or refunds for non-working radios. I still think this is a matter of perception.? 73, f?
Farhan, you must realize, the Elecraft and Xiegu radios are complete and ready for shipment right away, with warrantees. Its a fastpaced world, many hams have their noses to the grindstone from waking up till bedtime just to keep the lights on (and the tube filaments hot!). I am one of those hams. I was lucky enough to get my job back after covid, now I'm working 2-1/2 jobs just to catch up. I do have your excellent ubitx v5, also a v3, plus Sunil's enclosures, all still in their shipping boxes; someday when I can afford to shut off the fire hose a little, I can build them. I bought a Xiegu x6100 to have an actual radio that I can use, now.? As for the sbitx...interesting radio, may not be practical for me in my present situation. This is the reality... Regardless, thank you for all your wonderful creations! -- Rich It is an odd thing though, the Elecraft KH1 is a CW only radio, selling for 600 USD. Not really, if you add all the essentials, it stacks upto 1000 USD. Yet, they sell about 3000 radios per month. Radioddity sells the Xeigus in even higher numbers.
On the other hand, QRP Labs or HF signals builds open, hackable radios at about 1/5th the price. Yet, they are an acquired taste, to put it mildly.
Some may say that those are complete radios, and these are kits or thst they are not fully functional.
Neither is true, the QMX fully assembled retaila for 220 USD, with the kitchen sink.
The basic function of an sbitx (ssb/cw) is far more stable and superior to the G90. Sure, maybe the FT8 logging doesnt work as expectdd, but the G90 doesnt have it at all!
I guess, this is the nature of open radios and will remain so. Pretty much like Linux.
- f
I think the crowdfund could be the best way to check demand (for the assembled units).
Set up a goal of 20,000$ (200$? * 100) and see what happens.?
If the goal is not reached the money gets back, no harm to anyone.
|
...which is why I am still a member of this group, and have collected a number of agc kits, one of which will be installed in the v5. I think I may have bought a nextion display too. Just sayin', in a perfect world, we all would have the time and energy to tinker with an sbitx. And I repeat, you are one of my heroes.--Rich.
------ Original message------ From: Ashhar Farhan via Date: Sun, Sep 15, 2024 9:30 AM Cc: Ashhar Farhan via ; Subject:Re: [BITX20] Production zBitx #zbitx
Richard, The comparable radio with the Xeigu is the ubitx. It is completely usable out of the box. We do, offer replacements or refunds for non-working radios. I still think this is a matter of perception.? 73, f?
Farhan, you must realize, the Elecraft and Xiegu radios are complete and ready for shipment right away, with warrantees. Its a fastpaced world, many hams have their noses to the grindstone from waking up till bedtime just to keep the lights on (and the tube filaments hot!). I am one of those hams. I was lucky enough to get my job back after covid, now I'm working 2-1/2 jobs just to catch up. I do have your excellent ubitx v5, also a v3, plus Sunil's enclosures, all still in their shipping boxes; someday when I can afford to shut off the fire hose a little, I can build them. I bought a Xiegu x6100 to have an actual radio that I can use, now.? As for the sbitx...interesting radio, may not be practical for me in my present situation. This is the reality... Regardless, thank you for all your wonderful creations! -- Rich It is an odd thing though, the Elecraft KH1 is a CW only radio, selling for 600 USD. Not really, if you add all the essentials, it stacks upto 1000 USD. Yet, they sell about 3000 radios per month. Radioddity sells the Xeigus in even higher numbers.
On the other hand, QRP Labs or HF signals builds open, hackable radios at about 1/5th the price. Yet, they are an acquired taste, to put it mildly.
Some may say that those are complete radios, and these are kits or thst they are not fully functional.
Neither is true, the QMX fully assembled retaila for 220 USD, with the kitchen sink.
The basic function of an sbitx (ssb/cw) is far more stable and superior to the G90. Sure, maybe the FT8 logging doesnt work as expectdd, but the G90 doesnt have it at all!
I guess, this is the nature of open radios and will remain so. Pretty much like Linux.
- f
I think the crowdfund could be the best way to check demand (for the assembled units).
Set up a goal of 20,000$ (200$? * 100) and see what happens.?
If the goal is not reached the money gets back, no harm to anyone.
|
PS another diode the other way round feeding a small buzzer
gives an audible alarm if the power is upside down :-) !!!!!
toggle quoted message
Show quoted text
On Sun, Sep 15, 2024 at 02:58 PM, Gareth Evans wrote: Another approach which I have not seen proposed is to
switch the power to the radio with a relay with
contacts of suitable current handling.
The relay coil is fed by a diode so only comes in
when the power is of the correct polarity.
The advantage coming through the relay contacts
is that there is no voltage drop save for the
miniscule resistance of the relay contacts.
On Sat, Sep 14, 2024 at 09:34 PM, Dean Souleles wrote:
Reverse diode and a fuse is all I use on any of my projects. Total cost about
$0.50. Voltage drop equal zero.
|
Another approach which I have not seen proposed is to
switch the power to the radio with a relay with
contacts of suitable current handling.
The relay coil is fed by a diode so only comes in
when the power is of the correct polarity.
The advantage coming through the relay contacts
is that there is no voltage drop save for the
miniscule resistance of the relay contacts.
toggle quoted message
Show quoted text
On Sat, Sep 14, 2024 at 09:34 PM, Dean Souleles wrote: Reverse diode and a fuse is all I use on any of my projects. Total cost about
$0.50. Voltage drop equal zero.
|
Richard, The comparable radio with the Xeigu is the ubitx. It is completely usable out of the box. We do, offer replacements or refunds for non-working radios. I still think this is a matter of perception.? 73, f?
Farhan, you must realize, the Elecraft and Xiegu radios are complete and ready for shipment right away, with warrantees. Its a fastpaced world, many hams have their noses to the grindstone from waking up till bedtime just to keep the lights on (and the tube filaments hot!). I am one of those hams. I was lucky enough to get my job back after covid, now I'm working 2-1/2 jobs just to catch up. I do have your excellent ubitx v5, also a v3, plus Sunil's enclosures, all still in their shipping boxes; someday when I can afford to shut off the fire hose a little, I can build them. I bought a Xiegu x6100 to have an actual radio that I can use, now.? As for the sbitx...interesting radio, may not be practical for me in my present situation. This is the reality... Regardless, thank you for all your wonderful creations! -- Rich It is an odd thing though, the Elecraft KH1 is a CW only radio, selling for 600 USD. Not really, if you add all the essentials, it stacks upto 1000 USD. Yet, they sell about 3000 radios per month. Radioddity sells the Xeigus in even higher numbers.
On the other hand, QRP Labs or HF signals builds open, hackable radios at about 1/5th the price. Yet, they are an acquired taste, to put it mildly.
Some may say that those are complete radios, and these are kits or thst they are not fully functional.
Neither is true, the QMX fully assembled retaila for 220 USD, with the kitchen sink.
The basic function of an sbitx (ssb/cw) is far more stable and superior to the G90. Sure, maybe the FT8 logging doesnt work as expectdd, but the G90 doesnt have it at all!
I guess, this is the nature of open radios and will remain so. Pretty much like Linux.
- f
I think the crowdfund could be the best way to check demand (for the assembled units).
Set up a goal of 20,000$ (200$? * 100) and see what happens.?
If the goal is not reached the money gets back, no harm to anyone.
|
Farhan, you must realize, the Elecraft and Xiegu radios are complete and ready for shipment right away, with warrantees. Its a fastpaced world, many hams have their noses to the grindstone from waking up till bedtime just to keep the lights on (and the tube filaments hot!). I am one of those hams. I was lucky enough to get my job back after covid, now I'm working 2-1/2 jobs just to catch up. I do have your excellent ubitx v5, also a v3, plus Sunil's enclosures, all still in their shipping boxes; someday when I can afford to shut off the fire hose a little, I can build them. I bought a Xiegu x6100 to have an actual radio that I can use, now.? As for the sbitx...interesting radio, may not be practical for me in my present situation. This is the reality... Regardless, thank you for all your wonderful creations! -- Rich
------ Original message------ From: Ashhar Farhan via Date: Sun, Sep 15, 2024 8:11 AM Cc: Subject:Re: [BITX20] Production zBitx #zbitx
It is an odd thing though, the Elecraft KH1 is a CW only radio, selling for 600 USD. Not really, if you add all the essentials, it stacks upto 1000 USD. Yet, they sell about 3000 radios per month. Radioddity sells the Xeigus in even higher numbers.
On the other hand, QRP Labs or HF signals builds open, hackable radios at about 1/5th the price. Yet, they are an acquired taste, to put it mildly.
Some may say that those are complete radios, and these are kits or thst they are not fully functional.
Neither is true, the QMX fully assembled retaila for 220 USD, with the kitchen sink.
The basic function of an sbitx (ssb/cw) is far more stable and superior to the G90. Sure, maybe the FT8 logging doesnt work as expectdd, but the G90 doesnt have it at all!
I guess, this is the nature of open radios and will remain so. Pretty much like Linux.
- f
I think the crowdfund could be the best way to check demand (for the assembled units).
Set up a goal of 20,000$ (200$? * 100) and see what happens.?
If the goal is not reached the money gets back, no harm to anyone.
|
It is an odd thing though, the Elecraft KH1 is a CW only radio, selling for 600 USD. Not really, if you add all the essentials, it stacks upto 1000 USD. Yet, they sell about 3000 radios per month. Radioddity sells the Xeigus in even higher numbers.
On the other hand, QRP Labs or HF signals builds open, hackable radios at about 1/5th the price. Yet, they are an acquired taste, to put it mildly.
Some may say that those are complete radios, and these are kits or thst they are not fully functional.
Neither is true, the QMX fully assembled retaila for 220 USD, with the kitchen sink.
The basic function of an sbitx (ssb/cw) is far more stable and superior to the G90. Sure, maybe the FT8 logging doesnt work as expectdd, but the G90 doesnt have it at all!
I guess, this is the nature of open radios and will remain so. Pretty much like Linux.
- f
On Sun, Sep 15, 2024, 1:55 PM IU0KVG via <vincenzo.praturlon= [email protected]> wrote: I think the crowdfund could be the best way to check demand (for the assembled units).
Set up a goal of 20,000$ (200$? * 100) and see what happens.?
If the goal is not reached the money gets back, no harm to anyone.
|
Re: uBITX Digital Adapter Board pinouts
Send me an email at vu3sua@...Will send some pictures.?
|
I think the crowdfund could be the best way to check demand (for the assembled units).
Set up a goal of 20,000$ (200$? * 100) and see what happens.?
If the goal is not reached the money gets back, no harm to anyone.
|
We would produce it if there were demand for it.? It takes 100 pcbs to be viable.
On Sun, Sep 15, 2024, 12:40 PM IU0KVG via <vincenzo.praturlon= [email protected]> wrote: @Farhan Why don't we crowfund this?
200$ each, with a discount coupon for the same amount as perk.
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@Farhan Why don't we crowfund this?
200$ each, with a discount coupon for the same amount as perk.
|
Re: uBITX Digital Adapter Board pinouts
At the risk of replying to my own post ....
?
I found this reference in the list archive but the page no longer exists? ...
?
https://ubitx.com/2018/07/28/digital-adapter-board/
?
The Wayback Machine produced this but there's nothing there of worth either ...
?
https://web.archive.org/web/20181013095916/https://ubitx.com/2018/07/28/digital-adapter-board/
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uBITX Digital Adapter Board pinouts
Does anyone have the pinout/wiring diagram for the "Digital Adapter Board" as sold by
?
Its been a while since I bought the box/boards and now I'm finally getting to them but have lost the paperwork. I tried visiting their site to download it but nothing found. My intention is to add a small USB hub board to the back of the connector (as found on Amazon - 2 for $10) and wire the Radiuno and a CM108 sound interface directly into the box making for a single cable control/audio solution.
?
Thanks!
?
Mark NI2O
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Re: Data recovery from a dead MicroSD card
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Reverse diode and a fuse is all I use on any of my projects. Total cost about $0.50. Voltage drop equal zero.
|
I also use the fet method, not as simple as a diode, but voltage drop way lesd
I use Powerpoles for battery and PSU connections.? I also use KC9ON's FET-based devices in place of diodes.? They're good for up to 50 V and 7 A.
?
?
There are also 'ideal diode' boards that are inexpensive.? I've not used them, yet a guy with a Swiss distortion in the signal seems to like them.?
?
?
73, Andy
?
?
?
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I use Powerpoles for battery and PSU connections.? I also use KC9ON's FET-based devices in place of diodes.? They're good for up to 50 V and 7 A.
?
?
There are also 'ideal diode' boards that are inexpensive.? I've not used them, yet a guy with a Swiss distortion in the signal seems to like them.?
?
?
73, Andy
?
?
?
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Sunil Lakhani
Mark Phillips
Tominaz