Date   
Re: Loop antennas

Vic WA4THR
 

I have one of these portable loops that covers 3-17mHz and up to 25w. That is plenty of frequency coverage at this point in the solar cycle and the power of a uBitX.
http://doxytronics.com/

=Vic=

Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow — CleanTechnica Exclusive | CleanTechnica

Gordon Gibby
 

THANKS -- I didn't know that.   Yes, we need to keep on going.

On Tue, Mar 24, 2020 at 11:28 PM KD8CGH <rkayakr@...> wrote:
The ventilators that Musk donated were imported from China, he's not producing them.
https://www.forbes.com/sites/iainmartin/2020/03/24/elon-musk-ships-1200-ventilators-from-china-to-los-angeles/#7d7498771a7c
I don't think that those of us working on the ventilator can relax.
    Bob   KD8CGH

Re: Okay last time questions and then i quit

Rene
 

Oké Evan also thanks for you, i don't use the bitx for cw but it was just to try things out. I am.planning to use it for digital modes. If it al should work, i even want to put on an nextion screen on it but i don't want to put money in a box that doesn't work properley. So work is low now,not so many trains to drive so more time to solve things out. Again thanks you all for fast answering

Re: Okay last time questions and then i quit

Rene
 

On Wed, Mar 25, 2020 at 04:40 AM, Mark - N7EKU wrote:
Hi,

Rene said from before that he is using a dummy load, so that is not the problem.

I suppose there could be a problem with the raduino/display connection.  That could be sorted by doing a conductivity test using your multimeter for each pin to socket connection on the raduino connection.  Can you do that Rene?

Another suspected problem with the peeping could be that your HT receiver is too close. It kind of depends on how well shielded the transceiver and dummy load are.  But maybe you can try to have someone listen from another room in your house while you transmit?

I don't remember the status though, of your power out.  You have a known good power meter connected between your transceiver and dummy load?  Do you get power out using CW and a telegraph key plugged into the key jack (or shorted by hand)?  Still no power out when whistling in SSB mode?

You should eliminate the coax cables too.   Unplug the coax connector from your transceiver and measure across the connector.  If you have a dummy load at the other end, you should have a reading of 50 ohms or so.  Sometimes even brand new cables can be bad, so it is good to check them and eliminate them as a suspect.

If after all this, your radio still tests bad, I think something needs to be done via the vendor to help you out.  But do all these tests to make sure first.

Last thing, spinning the dial fast can cause problems for inexpensive encoders.  They should work fine at lower speeds, but can't handle fast rotations.  They kind of have a "speed limit" like a Yugo  :-p

73,


Mark

 Okay Mark thx for fast answereing, tommorroe i am gonna try al those things.. but for now, yes i use an dummy load, and furter no cables in the near. The receiver is an yupiteru mvt 7100 with dummy antenna on it(tryed also normal antenna) and i did put the ATT on so more weak receiving. Mayby i have to try on a diffrent place furter in the house. I have an 3 meters swr meter, swr,modulation and power. Swr stays on 0😉, modulation half but power on 20 meter more then 10, on 40 meter maybe 1 or 1.5 watts.
But i shall try to measure with the multimeter. Not today, beautiful weather so going fushin onsea. Again thanks for the tips. Brings down my frustration 🤣

Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow � CleanTechnica Exclusive | CleanTechnica

Vince Vielhaber
 

Not needed. A group was created for it.

Vince.

On 03/25/2020 01:12 AM, Raj vu2zap wrote:
There is something call sub groups that has been long ignored Arv.


At 25/03/2020, you wrote:
Gordon

Still thinking about how to manage the "hams working on ventilators"
traffic versus
the rest of the BITX-20 group discussions. Wonder if it would work
to let the ventilator
traffic continue but keep it under a very specific #topic header.Â
This would allow
those who are not interested in ventilating to just mute that topic so
they would
never see it again. Your thoughts...?

Arv
_._


On Mon, Mar 23, 2020 at 10:15 PM Gordon Gibby
<docvacuumtubes@... <mailto:docvacuumtubes@...> > wrote:

Thank you Arv.  Probably 35 messages have gone out internal the
group working on the ventilator in the last 24 hours alone. Â
Two programmers have written working or nearly working code to
improve on the tiny stuff that I wrote; one press release was
authorized; a university PIO has come on line, and three
manufacturers have stepped up to potentially assist or
manufacture.  All of that happened with very little email here
(unless I happened to slip up and sned it to the wrong place and
if so, I apologize) -- and now we are at the point of moving
toward a printed circuit board design and final software. Â
Some had ASKED for updates on this forum.  All of this,
including frantic efforts to find suitable pressure transducers
etc, fervent discussions of legal matters, and safety concerns and
some arguments that were a waste of time...all happened outside
this forum (which was appropriate).  97.1 indicates amateur
radio is to be a RESERVOIR of trained people....and this in
keeping with the outworking of precisely that.  Once a
sufficient number became involved, there was no further need to
discuss on this forum (unless by accident I sent the wrong place,
my apologies).

THANKS for all who have volunteered their time and expertise, the
group who started this has been overwhelmed with offers.
Lets hope this does some good.

Gordon Gibby KX4Z



On Mon, Mar 23, 2020 at 11:49 PM Arv Evans <arvid.evans@...
<mailto:arvid.evans@...>> wrote:


A recent ARRL news post highlighted the BITX20 group effort to
work up a low cost design for a safe ventilator. Â

These are strange times that might offer an opportunity for
hams to "make a difference".Â

My request is for those not interested in this subject to mute
the topic for the next few days. Work is ongoing to form a
new group to focus directly on this effort. This will
hopefully move the ventilator messages to that venue. If
off-topic posts persists after the new group is functioning,
those posts can be moderated and redirected to that group. Â

I would ask those who are setting up a new info and control
web site for the ventilator project to post a notification
here when their site is up and running. Once that is done we
can take steps to move ventilator traffic over to that new
discussion site.

Thanks

Arv
_-_


On Mon, Mar 23, 2020, 8:53 PM Jerry Gaffke via Groups.Io
<jgaffke=yahoo.com@groups.io <mailto:yahoo.com@groups.io> > wrote:

Ken,

Your best bet is convince the forum moderator, that would
be Arv:
   https://groups.io/g/BITX20/message/77310

I suppose you could check with Farhan, he may still have
some pull here:
   https://groups.io/g/BITX20/message/2
   https://groups.io/g/BITX20/message/77283

Failing the above, perhaps start your own group?

Talk about this pandemic will be everywhere that people
communicate.
If you want to avoid any such discussion, I suggest you
pull the plug onÂ
your computer, radio and TV till about this time next year.

Back to the topic:Â Â
Hopefully, if I need a ventilator, it will be something
fully vetted by the FDA and UL and whatever.
Hard to imagine Tesla and GM producing enough at
sufficiently low cost to satisfy the needs
of every African village. This Nano + SprinklerValve
thing may or may not be the answer,
but seems an effort well worth supporting.Â

> My vote is to stay on-topic,
I haven't seen a post here about the Bitx20 in ages. ;-)

Jerry, KE7ER


On Mon, Mar 23, 2020 at 05:27 PM, Ken Hansen wrote:

Opinions vary, news of Elon Musk's latest exploits
have never been covered here before - I see no reason
to start now.
Â
Do we want to start debating the suitability of a
first-time medical device maker going from blank sheet
of paper to respirator in a hospital ICU without *any*
meaningful regulatory review in two weeks?
Â
Typically the goal of international groups such as
this one is to remain apolitical and avoid discussions
of topics that only affect one region By staying on
topic. (Remember the "CA State is shutting down all
repeaters" scare? The "France wants to eliminate the
2m band" scare? In my opinion those discussions didn't
belong here either, thought they were arguably Amateur
Radio-related, unlike the Elon Musk link.) This group
has a specific purpose on it's groups.io
<http://groups.io> homepage:
Â
"This group exists for constructors of the various
BITX projects, to discuss all aspects of the design
and construction including problems, components,
modifications and experiences using the rigs."
Â
Source:Â https://groups.io/g/BITX20
Â
My vote is to stay on-topic, but mine is only one of
the 7,833 voices on this reflector. I'll happily
reconsider if/when I hear Elon has ordered a uBitx has
had some feedback or improvements on the design.
Â
Ken, N2VIP
Â

Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow � CleanTechnica Exclusive | CleanTechnica

 

There is something call sub groups that has been long ignored Arv.


At 25/03/2020, you wrote:
Gordon

Still thinking about how to manage the "hams working on ventilators" traffic versus
the rest of the BITX-20 group discussions.  Wonder if it would work to let the ventilator
traffic continue but keep it under a very specific #topic header.  This would allow
those who are not interested in ventilating to just mute that topic so they would
never see it again.  Your thoughts...?

Arv
_._


On Mon, Mar 23, 2020 at 10:15 PM Gordon Gibby <docvacuumtubes@... > wrote:
Thank you Arv.   Probably 35 messages have gone out internal the group working on the ventilator in the last 24 hours alone.   Two programmers have written working or nearly working code to improve on the tiny stuff that I wrote; one press release was authorized; a university PIO has come on line, and three manufacturers have stepped up to potentially assist or manufacture.   All of that happened with very little email here (unless I happened to slip up and sned it to the wrong place and if so, I apologize) -- and now we are at the point of moving toward a printed circuit board design and final software.    Some had ASKED for updates on this forum.   All of this, including frantic efforts to find suitable pressure transducers etc, fervent discussions of legal matters, and safety concerns and some arguments that were a waste of time...all happened outside this forum (which was appropriate).   97.1 indicates amateur radio is to be a RESERVOIR of trained people....and this in keeping with the outworking of precisely that.   Once a sufficient number became involved, there was no further need to discuss on this forum (unless by accident I sent the wrong place, my apologies).

THANKS for all who have volunteered their time and expertise, the group who started this has been overwhelmed with offers.
Lets hope this does some good.

Gordon Gibby KX4Z



On Mon, Mar 23, 2020 at 11:49 PM Arv Evans <arvid.evans@...> wrote:

A recent ARRL news post highlighted the BITX20 group effort to work up a low cost design for a safe ventilator. Â

These are strange times that might offer an opportunity for hams to "make a difference".Â

My request is for those not interested in this subject to mute the topic for the next few days.  Work is ongoing to form a new group to focus directly on this effort.  This will hopefully move the ventilator messages to that venue.  If off-topic posts persists after the new group is functioning, those posts can be moderated and redirected to that group. Â

I would ask those who are setting up a new info and control web site for the ventilator project to post a notification here when their site is up and running.  Once that is done we can take steps to move ventilator traffic over to that new discussion site.

Thanks

Arv
_-_


On Mon, Mar 23, 2020, 8:53 PM Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io > wrote:
Ken,

Your best bet is convince the forum moderator, that would be Arv:
    https://groups.io/g/BITX20/message/77310

I suppose you could check with Farhan, he may still have some pull here:
    https://groups.io/g/BITX20/message/2
    https://groups.io/g/BITX20/message/77283

Failing the above, perhaps start your own group?

Talk about this pandemic will be everywhere that people communicate.
If you want to avoid any such discussion, I suggest you pull the plug onÂ
your computer, radio and TV till about this time next year.

Back to the topic:Â Â
Hopefully, if I need a ventilator, it will be something fully vetted by the FDA and UL and whatever.
Hard to imagine Tesla and GM producing enough at sufficiently low cost to satisfy the needs
of every African village.  This Nano + SprinklerValve thing may or may not be the answer,
but seems an effort well worth supporting.Â

> My vote is to stay on-topic,
I haven't seen a post here about the Bitx20 in ages.  ;-)

Jerry, KE7ER


On Mon, Mar 23, 2020 at 05:27 PM, Ken Hansen wrote:
Opinions vary, news of Elon Musk's latest exploits have never been covered here before - I see no reason to start now.
Â
Do we want to start debating the suitability of a first-time medical device maker going from blank sheet of paper to respirator in a hospital ICU without *any* meaningful regulatory review in two weeks?
Â
Typically the goal of international groups such as this one is to remain apolitical and avoid discussions of topics that only affect one region By staying on topic. (Remember the "CA State is shutting down all repeaters" scare? The "France wants to eliminate the 2m band" scare? In my opinion those discussions didn't belong here either, thought they were arguably Amateur Radio-related, unlike the Elon Musk link.) This group has a specific purpose on it's groups.io homepage:
Â
"This group exists for constructors of the various BITX projects, to discuss all aspects of the design and construction including problems, components, modifications and experiences using the rigs."
Â
Source:Â https://groups.io/g/BITX20
Â
My vote is to stay on-topic, but mine is only one of the 7,833 voices on this reflector. I'll happily reconsider if/when I hear Elon has ordered a uBitx has had some feedback or improvements on the design.
Â
Ken, N2VIP
Â

input voltage in uBITX v6 #ubitxv6

ca4wqp@...
 

Hola, ¿puedo alimentar mi uBitX-6 con 13.8 voltios? Tengo dudas ya que Arduino recomienda alimentar con 12 voltios.

73
Ca4wqp 

Re: Okay last time questions and then i quit

 

Hi,

Rene said from before that he is using a dummy load, so that is not the problem.

I suppose there could be a problem with the raduino/display connection.  That could be sorted by doing a conductivity test using your multimeter for each pin to socket connection on the raduino connection.  Can you do that Rene?

Another suspected problem with the peeping could be that your HT receiver is too close. It kind of depends on how well shielded the transceiver and dummy load are.  But maybe you can try to have someone listen from another room in your house while you transmit?

I don't remember the status though, of your power out.  You have a known good power meter connected between your transceiver and dummy load?  Do you get power out using CW and a telegraph key plugged into the key jack (or shorted by hand)?  Still no power out when whistling in SSB mode?

You should eliminate the coax cables too.   Unplug the coax connector from your transceiver and measure across the connector.  If you have a dummy load at the other end, you should have a reading of 50 ohms or so.  Sometimes even brand new cables can be bad, so it is good to check them and eliminate them as a suspect.

If after all this, your radio still tests bad, I think something needs to be done via the vendor to help you out.  But do all these tests to make sure first.

Last thing, spinning the dial fast can cause problems for inexpensive encoders.  They should work fine at lower speeds, but can't handle fast rotations.  They kind of have a "speed limit" like a Yugo  :-p

73,


Mark

Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow — CleanTechnica Exclusive | CleanTechnica

Bob Benedict, KD8CGH
 

The ventilators that Musk donated were imported from China, he's not producing them.
https://www.forbes.com/sites/iainmartin/2020/03/24/elon-musk-ships-1200-ventilators-from-china-to-los-angeles/#7d7498771a7c
I don't think that those of us working on the ventilator can relax.
    Bob   KD8CGH

Re: Okay last time questions and then i quit

Curt
 

Rene

There is a fine transceiver in that box, so do not quit please.

Try tuning slowly, is it better?  if encoder is very very bad, request replacement.  if not so bad, it may be like mine, just he gentle.

Describe your antenna or dummy load? Also what kind of power supply? A bad antenna can cause RF leakage back into the transceiver.

Please get your license, in good conditions ubitx can reach to USA from Netherlands.

73 curt wb8yyy

Re: SOLICITAÇÃO DE AJUDA - HELP

Curt
 

Rubens

I doubt this is due to bias if other bands are okay.

My v4 was outputting about 2 to 3 watts on 40m, while more than 7 watts on 80 and 30 meters. Add a few hundred pF in parallel with C81, leaded part okay. That may cure it.

Search on C81 to see Farhan's discussion.

Curt wb8yyy

Re: SOLICITAÇÃO DE AJUDA - HELP

AndyH
 

Hi Rubens,

   The first part of this document has instructions for setting PA bias:  http://ubitx.net/wp-content/uploads/2018/06/uBITX-tune-up-instructions.pdf
   
    73, Andy, KG5RKP


On Tue, Mar 24, 2020 at 05:26 PM, Rubens Kamimura wrote:
Help !!!

I have an uBITX v4, it has low power problems in 40m, so I would like to check the power output settings. How do I adjust the idle current in the uBITX v4? I have a milliammeter connected to the PA's + V supply.
 

--
Saudações fraternais, 73/51 PY2PVB
 
Rubens Kamimura
Tel. (18) 3746-8680 ramal 116
Cel. (18) 9-9819-2225 WhatsApp ou (18) 9-9819-2255 

SOLICITAÇÃO DE AJUDA - HELP

Rubens Kamimura
 

Help !!!

I have an uBITX v4, it has low power problems in 40m, so I would like to check the power output settings. How do I adjust the idle current in the uBITX v4? I have a milliammeter connected to the PA's + V supply.


--
Saudações fraternais, 73/51 PY2PVB

Rubens Kamimura
Tel. (18) 3746-8680 ramal 116
Cel. (18) 9-9819-2225 WhatsApp ou (18) 9-9819-2255 


---------- Forwarded message ---------
De: Rubens Kamimura <rubens.kamimura@...>
Date: ter., 24 de mar. de 2020 às 11:54
Subject: SOLICITAÇÃO DE AJUDA - HELP
To: <BITX20+help@groups.io>


Grupo, bom dia.

Tenho um uBITX v4, está com problemas de baixa potência em 40m, então gostaria de conferir os ajustes da saída de potência. Como faço para ajustar a corrente de repouso no uBITX v4?
Estou com miliamperímetro conectado na alimentação +V do PA.

@English

I have an uBITX v4, it has low power problems in 40m, so I would like to check the power output settings. How do I adjust the idle current in the uBITX v4? I have a milliammeter connected to the PA's + V supply.

--
Saudações fraternais, 73/51 PY2PVB

Rubens Kamimura
Tel. (18) 3746-8680 ramal 116
Cel. (18) 9-9819-2225 WhatsApp ou (18) 9-9819-2255 

Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow — CleanTechnica Exclusive | CleanTechnica

Arv Evans
 

Gordon

Yes.  Seeing Jacks post about the new group relieves some of the pressure to do more here regarding ventilator development.  I will be doing research over the next couple of days to see if some sort of cross-linking is possible.  Not sure how this might work, or if it is even possible.  More later as needed.

Arv

On Tue, Mar 24, 2020, 1:53 PM Gordon Gibby <docvacuumtubes@...> wrote:
Hi arv --- whatever works best,, I'm fine with -- there is this new forum now and I think quite a few peopple are there.
It is possible that SOME people in the wider group would like periodic updates (altruism, pride in thehobby, that sort of thing) so maybe a topic or something woud be wide.   Whatever you think best!  We have a LOT of helping people now!
THANKS!
Gordon


On Tue, Mar 24, 2020 at 3:33 PM Arv Evans <arvid.evans@...> wrote:
Gordon

Still thinking about how to manage the "hams working on ventilators" traffic versus
the rest of the BITX-20 group discussions.  Wonder if it would work to let the ventilator
traffic continue but keep it under a very specific #topic header.  This would allow
those who are not interested in ventilating to just mute that topic so they would
never see it again.  Your thoughts...?

Arv
_._


On Mon, Mar 23, 2020 at 10:15 PM Gordon Gibby <docvacuumtubes@...> wrote:
Thank you Arv.   Probably 35 messages have gone out internal the group working on the ventilator in the last 24 hours alone.   Two programmers have written working or nearly working code to improve on the tiny stuff that I wrote; one press release was authorized; a university PIO has come on line, and three manufacturers have stepped up to potentially assist or manufacture.   All of that happened with very little email here (unless I happened to slip up and sned it to the wrong place and if so, I apologize) -- and now we are at the point of moving toward a printed circuit board design and final software.    Some had ASKED for updates on this forum.   All of this, including frantic efforts to find suitable pressure transducers etc, fervent discussions of legal matters, and safety concerns and some arguments that were a waste of time...all happened outside this forum (which was appropriate).   97.1 indicates amateur radio is to be a RESERVOIR of trained people....and this in keeping with the outworking of precisely that.   Once a sufficient number became involved, there was no further need to discuss on this forum (unless by accident I sent the wrong place, my apologies).

THANKS for all who have volunteered their time and expertise, the group who started this has been overwhelmed with offers.
Lets hope this does some good.

Gordon Gibby KX4Z



On Mon, Mar 23, 2020 at 11:49 PM Arv Evans <arvid.evans@...> wrote:

A recent ARRL news post highlighted the BITX20 group effort to work up a low cost design for a safe ventilator.  

These are strange times that might offer an opportunity for hams to "make a difference". 

My request is for those not interested in this subject to mute the topic for the next few days.  Work is ongoing to form a new group to focus directly on this effort.  This will hopefully move the ventilator messages to that venue.  If off-topic posts persists after the new group is functioning, those posts can be moderated and redirected to that group.  

I would ask those who are setting up a new info and control web site for the ventilator project to post a notification here when their site is up and running.  Once that is done we can take steps to move ventilator traffic over to that new discussion site.

Thanks

Arv
_-_


On Mon, Mar 23, 2020, 8:53 PM Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io> wrote:
Ken,

Your best bet is convince the forum moderator, that would be Arv:
    https://groups.io/g/BITX20/message/77310

I suppose you could check with Farhan, he may still have some pull here:
    https://groups.io/g/BITX20/message/2
    https://groups.io/g/BITX20/message/77283

Failing the above, perhaps start your own group?

Talk about this pandemic will be everywhere that people communicate.
If you want to avoid any such discussion, I suggest you pull the plug on 
your computer, radio and TV till about this time next year.

Back to the topic:  
Hopefully, if I need a ventilator, it will be something fully vetted by the FDA and UL and whatever.
Hard to imagine Tesla and GM producing enough at sufficiently low cost to satisfy the needs
of every African village.  This Nano + SprinklerValve thing may or may not be the answer,
but seems an effort well worth supporting. 

> My vote is to stay on-topic,
I haven't seen a post here about the Bitx20 in ages.  ;-)

Jerry, KE7ER


On Mon, Mar 23, 2020 at 05:27 PM, Ken Hansen wrote:
Opinions vary, news of Elon Musk's latest exploits have never been covered here before - I see no reason to start now.
 
Do we want to start debating the suitability of a first-time medical device maker going from blank sheet of paper to respirator in a hospital ICU without *any* meaningful regulatory review in two weeks?
 
Typically the goal of international groups such as this one is to remain apolitical and avoid discussions of topics that only affect one region By staying on topic. (Remember the "CA State is shutting down all repeaters" scare? The "France wants to eliminate the 2m band" scare? In my opinion those discussions didn't belong here either, thought they were arguably Amateur Radio-related, unlike the Elon Musk link.) This group has a specific purpose on it's groups.io homepage:
 
"This group exists for constructors of the various BITX projects, to discuss all aspects of the design and construction including problems, components, modifications and experiences using the rigs."
 
 
My vote is to stay on-topic, but mine is only one of the 7,833 voices on this reflector. I'll happily reconsider if/when I hear Elon has ordered a uBitx has had some feedback or improvements on the design.
 
Ken, N2VIP
 

Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow — CleanTechnica Exclusive | CleanTechnica

Gordon Gibby
 

Well, if you guys can get those ventilators made within the next few days, that would be great.   Otherwise people will die.
I don't know what else to say.    Get your companies cranking out free ventilators on 24-hour shifts and then the rest of us won't need to worrry.



On Tue, Mar 24, 2020 at 5:05 PM Compton <comptonallen@...> wrote:
The designs for cost effective ventilators already exist.

If production facitlites were to adapt to be able to produce existing curretnly FDA etc approved ventilators then that may be the fastest way to produce effective and safe ventilators.
The IMV designs that I am seeing being discussed are likely to produce many unintended consequenes if used on patients. The legal systems in developed contries will be clogged for decades as a result.
Support modes such as PSV, CPAP is what are needed.
I have worked in the ventilator industry for 30 years and have sat on the national standards committee in Australia that writes the local standards and contributes to the internationl standards.

Compton
Sydney, Australia

Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow — CleanTechnica Exclusive | CleanTechnica

Compton
 

The designs for cost effective ventilators already exist.

If production facitlites were to adapt to be able to produce existing curretnly FDA etc approved ventilators then that may be the fastest way to produce effective and safe ventilators.
The IMV designs that I am seeing being discussed are likely to produce many unintended consequenes if used on patients. The legal systems in developed contries will be clogged for decades as a result.
Support modes such as PSV, CPAP is what are needed.
I have worked in the ventilator industry for 30 years and have sat on the national standards committee in Australia that writes the local standards and contributes to the internationl standards.

Compton
Sydney, Australia

Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow — CleanTechnica Exclusive | CleanTechnica

Gordon Gibby
 

Hi arv --- whatever works best,, I'm fine with -- there is this new forum now and I think quite a few peopple are there.
It is possible that SOME people in the wider group would like periodic updates (altruism, pride in thehobby, that sort of thing) so maybe a topic or something woud be wide.   Whatever you think best!  We have a LOT of helping people now!
THANKS!
Gordon


On Tue, Mar 24, 2020 at 3:33 PM Arv Evans <arvid.evans@...> wrote:
Gordon

Still thinking about how to manage the "hams working on ventilators" traffic versus
the rest of the BITX-20 group discussions.  Wonder if it would work to let the ventilator
traffic continue but keep it under a very specific #topic header.  This would allow
those who are not interested in ventilating to just mute that topic so they would
never see it again.  Your thoughts...?

Arv
_._


On Mon, Mar 23, 2020 at 10:15 PM Gordon Gibby <docvacuumtubes@...> wrote:
Thank you Arv.   Probably 35 messages have gone out internal the group working on the ventilator in the last 24 hours alone.   Two programmers have written working or nearly working code to improve on the tiny stuff that I wrote; one press release was authorized; a university PIO has come on line, and three manufacturers have stepped up to potentially assist or manufacture.   All of that happened with very little email here (unless I happened to slip up and sned it to the wrong place and if so, I apologize) -- and now we are at the point of moving toward a printed circuit board design and final software.    Some had ASKED for updates on this forum.   All of this, including frantic efforts to find suitable pressure transducers etc, fervent discussions of legal matters, and safety concerns and some arguments that were a waste of time...all happened outside this forum (which was appropriate).   97.1 indicates amateur radio is to be a RESERVOIR of trained people....and this in keeping with the outworking of precisely that.   Once a sufficient number became involved, there was no further need to discuss on this forum (unless by accident I sent the wrong place, my apologies).

THANKS for all who have volunteered their time and expertise, the group who started this has been overwhelmed with offers.
Lets hope this does some good.

Gordon Gibby KX4Z



On Mon, Mar 23, 2020 at 11:49 PM Arv Evans <arvid.evans@...> wrote:

A recent ARRL news post highlighted the BITX20 group effort to work up a low cost design for a safe ventilator.  

These are strange times that might offer an opportunity for hams to "make a difference". 

My request is for those not interested in this subject to mute the topic for the next few days.  Work is ongoing to form a new group to focus directly on this effort.  This will hopefully move the ventilator messages to that venue.  If off-topic posts persists after the new group is functioning, those posts can be moderated and redirected to that group.  

I would ask those who are setting up a new info and control web site for the ventilator project to post a notification here when their site is up and running.  Once that is done we can take steps to move ventilator traffic over to that new discussion site.

Thanks

Arv
_-_


On Mon, Mar 23, 2020, 8:53 PM Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io> wrote:
Ken,

Your best bet is convince the forum moderator, that would be Arv:
    https://groups.io/g/BITX20/message/77310

I suppose you could check with Farhan, he may still have some pull here:
    https://groups.io/g/BITX20/message/2
    https://groups.io/g/BITX20/message/77283

Failing the above, perhaps start your own group?

Talk about this pandemic will be everywhere that people communicate.
If you want to avoid any such discussion, I suggest you pull the plug on 
your computer, radio and TV till about this time next year.

Back to the topic:  
Hopefully, if I need a ventilator, it will be something fully vetted by the FDA and UL and whatever.
Hard to imagine Tesla and GM producing enough at sufficiently low cost to satisfy the needs
of every African village.  This Nano + SprinklerValve thing may or may not be the answer,
but seems an effort well worth supporting. 

> My vote is to stay on-topic,
I haven't seen a post here about the Bitx20 in ages.  ;-)

Jerry, KE7ER


On Mon, Mar 23, 2020 at 05:27 PM, Ken Hansen wrote:
Opinions vary, news of Elon Musk's latest exploits have never been covered here before - I see no reason to start now.
 
Do we want to start debating the suitability of a first-time medical device maker going from blank sheet of paper to respirator in a hospital ICU without *any* meaningful regulatory review in two weeks?
 
Typically the goal of international groups such as this one is to remain apolitical and avoid discussions of topics that only affect one region By staying on topic. (Remember the "CA State is shutting down all repeaters" scare? The "France wants to eliminate the 2m band" scare? In my opinion those discussions didn't belong here either, thought they were arguably Amateur Radio-related, unlike the Elon Musk link.) This group has a specific purpose on it's groups.io homepage:
 
"This group exists for constructors of the various BITX projects, to discuss all aspects of the design and construction including problems, components, modifications and experiences using the rigs."
 
 
My vote is to stay on-topic, but mine is only one of the 7,833 voices on this reflector. I'll happily reconsider if/when I hear Elon has ordered a uBitx has had some feedback or improvements on the design.
 
Ken, N2VIP
 

Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow — CleanTechnica Exclusive | CleanTechnica

Arv Evans
 

Farhan

Still thinking about how to handle traffic related to this mostly-ham effort and still
not offend the rest of the group?  What about making a specific #topic header
so that those not interested in the topic could just mute that #topic and never
again see those posts? This approach might allow those who are interested in
both BITX-xxx and ventilators to see all the discussions, and at the same time
provide a way for those not interested in venting to not see ventilator focused
postings. 

Comments and suggestions are welcome. 

Arv
_._


On Tue, Mar 24, 2020 at 2:46 AM Ashhar Farhan <farhanbox@...> wrote:
I vote to moving these discussions to a separate group. Jack, will you be able to create a new group? It is best to take this discussion into that.

- f

On Tue, Mar 24, 2020 at 12:45 PM Ken Hansen <ken@...> wrote:
Jerry,

It's not that big a problem for me, I have no need to try and force my opinion on others - I simply shared my opinion, and when challenged, I responded.

As I said, I'm just one of 7,833 members of this group - my opinion only represents 1/7,833 of the members.

Thanks,

Ken, N2VIP

> On Mar 23, 2020, at 9:53 PM, Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io> wrote:
>
> Your best bet is convince the forum moderator, that would be Arv:




Re: Elon Musk: Should Have 1000 Ventilators Next Week, + 250,000 N95 Masks For Hospitals Tomorrow — CleanTechnica Exclusive | CleanTechnica

Arv Evans
 

Gordon

Still thinking about how to manage the "hams working on ventilators" traffic versus
the rest of the BITX-20 group discussions.  Wonder if it would work to let the ventilator
traffic continue but keep it under a very specific #topic header.  This would allow
those who are not interested in ventilating to just mute that topic so they would
never see it again.  Your thoughts...?

Arv
_._


On Mon, Mar 23, 2020 at 10:15 PM Gordon Gibby <docvacuumtubes@...> wrote:
Thank you Arv.   Probably 35 messages have gone out internal the group working on the ventilator in the last 24 hours alone.   Two programmers have written working or nearly working code to improve on the tiny stuff that I wrote; one press release was authorized; a university PIO has come on line, and three manufacturers have stepped up to potentially assist or manufacture.   All of that happened with very little email here (unless I happened to slip up and sned it to the wrong place and if so, I apologize) -- and now we are at the point of moving toward a printed circuit board design and final software.    Some had ASKED for updates on this forum.   All of this, including frantic efforts to find suitable pressure transducers etc, fervent discussions of legal matters, and safety concerns and some arguments that were a waste of time...all happened outside this forum (which was appropriate).   97.1 indicates amateur radio is to be a RESERVOIR of trained people....and this in keeping with the outworking of precisely that.   Once a sufficient number became involved, there was no further need to discuss on this forum (unless by accident I sent the wrong place, my apologies).

THANKS for all who have volunteered their time and expertise, the group who started this has been overwhelmed with offers.
Lets hope this does some good.

Gordon Gibby KX4Z



On Mon, Mar 23, 2020 at 11:49 PM Arv Evans <arvid.evans@...> wrote:

A recent ARRL news post highlighted the BITX20 group effort to work up a low cost design for a safe ventilator.  

These are strange times that might offer an opportunity for hams to "make a difference". 

My request is for those not interested in this subject to mute the topic for the next few days.  Work is ongoing to form a new group to focus directly on this effort.  This will hopefully move the ventilator messages to that venue.  If off-topic posts persists after the new group is functioning, those posts can be moderated and redirected to that group.  

I would ask those who are setting up a new info and control web site for the ventilator project to post a notification here when their site is up and running.  Once that is done we can take steps to move ventilator traffic over to that new discussion site.

Thanks

Arv
_-_


On Mon, Mar 23, 2020, 8:53 PM Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io> wrote:
Ken,

Your best bet is convince the forum moderator, that would be Arv:
    https://groups.io/g/BITX20/message/77310

I suppose you could check with Farhan, he may still have some pull here:
    https://groups.io/g/BITX20/message/2
    https://groups.io/g/BITX20/message/77283

Failing the above, perhaps start your own group?

Talk about this pandemic will be everywhere that people communicate.
If you want to avoid any such discussion, I suggest you pull the plug on 
your computer, radio and TV till about this time next year.

Back to the topic:  
Hopefully, if I need a ventilator, it will be something fully vetted by the FDA and UL and whatever.
Hard to imagine Tesla and GM producing enough at sufficiently low cost to satisfy the needs
of every African village.  This Nano + SprinklerValve thing may or may not be the answer,
but seems an effort well worth supporting. 

> My vote is to stay on-topic,
I haven't seen a post here about the Bitx20 in ages.  ;-)

Jerry, KE7ER


On Mon, Mar 23, 2020 at 05:27 PM, Ken Hansen wrote:
Opinions vary, news of Elon Musk's latest exploits have never been covered here before - I see no reason to start now.
 
Do we want to start debating the suitability of a first-time medical device maker going from blank sheet of paper to respirator in a hospital ICU without *any* meaningful regulatory review in two weeks?
 
Typically the goal of international groups such as this one is to remain apolitical and avoid discussions of topics that only affect one region By staying on topic. (Remember the "CA State is shutting down all repeaters" scare? The "France wants to eliminate the 2m band" scare? In my opinion those discussions didn't belong here either, thought they were arguably Amateur Radio-related, unlike the Elon Musk link.) This group has a specific purpose on it's groups.io homepage:
 
"This group exists for constructors of the various BITX projects, to discuss all aspects of the design and construction including problems, components, modifications and experiences using the rigs."
 
 
My vote is to stay on-topic, but mine is only one of the 7,833 voices on this reflector. I'll happily reconsider if/when I hear Elon has ordered a uBitx has had some feedback or improvements on the design.
 
Ken, N2VIP
 

Re: Capacitive Keyer Requirements? #bitx40 #ubitx #cw

AndyH
 

Hi Barry,

   Thanks for sharing your experience.  I'll start a search for something mechanical!  
   
   73, Andy


On Tue, Mar 24, 2020 at 12:18 PM, barry halterman wrote:
I have tried various touch paddles in the past and did not like them. One model (home brew), would stop working after awhile. I never found the cause of this issue. The second one I purchased and it had a metal plate to rest one's fist on....paddle worked fair but was tough to get used to as my fingers would tend to wander to the front of the sensing pad and would miss dits or dashes after awhile.
Art, W8CIT had an article in QST last year about a force touch paddle that sounded intriguing but I never built it up.
Being a mechanical type, I like paddles that have many adjustments available.
Good luck with your endeavors.
Barry

On Mon, Mar 23, 2020, 10:03 PM Curt via Groups.Io <wb8yyy=yahoo.com@groups.io> wrote:
Andy

There are circuits needed to convert touch into closed switch action. A search should turn up US and other sellers of this type of paddle kits.

I find a mechanical paddle more to my liking. Qrpguys and maybe n8dah has paddle kits that are inexpensive.

Have fun exploring. 

Curt wb8yyy