Date   

Re: FS: Rpi kit and loaded Rpi

JJ
 

On 13-04-14 09:03 AM, Kerry McKenzie wrote:
 

Greetings Ron
I am hearing you loud and clear,.... and have almost put the whole lot
under the wheels of my car on more than one occasion, and have wasted 2
months and a lot of other peoples time trying to get my head around
linux and I have a small IT business, microsoft based.
However when you are dealing with something that is free to begin
with,... you cannot expect it to work every time or the commands to be
the same for every different type there is.
I can see that linux has a long way to go before the average pc user
could even try and use it. And i have to say these RPI's leave me for dead.

--
Kind Regards
Kerry McKenzie

PO Box 4492
Kirwan QLD 4817
Australia

BTW, for a novice, I recommend the live dvd of linux mint....hands-free boot to the desktop where I'm sure almost anyone can click firefox icon and google any needed info....not quite so easy on a PI (yet)
I carry an external 1tb usb bootable drive around with me so I can boot linux on any machine I encounter...used to use a 16g flash drive, but it wore out and I don't think I'll ever buy another flash drive...ssd is getting cheaper.....



Re: FS: Rpi kit and loaded Rpi

JJ
 

On 13-04-14 09:03 AM, Kerry McKenzie wrote:
 

Greetings Ron
I am hearing you loud and clear,.... and have almost put the whole lot
under the wheels of my car on more than one occasion, and have wasted 2
months and a lot of other peoples time trying to get my head around
linux and I have a small IT business, microsoft based.
However when you are dealing with something that is free to begin
with,... you cannot expect it to work every time or the commands to be
the same for every different type there is.
I can see that linux has a long way to go before the average pc user
could even try and use it. And i have to say these RPI's leave me for dead.

--
Kind Regards
Kerry McKenzie

PO Box 4492
Kirwan QLD 4817
Australia

I get a lot of useful info if I google "top ten linux commands".....or "linux commands"....but that'd be useless if all ya want to do is point and click and not care how things work, lol, nowadays it's touch screens...hate the dang things...hate windoze....
although we lose a lot of windows users when they click on "Click here to speed up your PC", lololol! no disrespect to the O.P., but I installed linux mint on an 8 yr olds PC...he'd never used windows, and in one day he had games installed, all multimedia working, and even knew how to chmod by reading up on it....(he googled "linux file permissions")...mind you, not all 8 yr olds are that talented, hi hi...and the fact that he'd never used windows helped alleviate confusion...but it can be a steep learning curve for most of us....I have frustration issues with iptables, lol!
also, just wondering what you are trying to do with linux that can't be solved? many users willing to help...some are even willing to go in and fix it for ya....great bunch on here, and I'm sure even the vaguest question should bring results....


Re: Another alternaive to linix?

Ray Cadmus
 

 I understand some of the frustration that the new Linux users are facing.  I've been using Linux since the mid 90's and still find a need to look up how to do some things.  The old mind just doesn't remember well any more :-(

Anyway...  Here is a link to a command conversion chart - UNIX (Linux) for Dos users.

http://www.yolinux.com/TUTORIALS/unix_for_dos_users.html

Hope this helps,

ray    W0PFO


Re: FS: Rpi kit and loaded Rpi

Jim Tovet <jim@...>
 

Hi Ronny.

I'm just getting started and really don't know exactly
what I need but that sounds like a great deal!

I'll take everything for the $80...unless someone beat me.

73 Jim W1JT


On Sun, Apr 14, 2013 at 2:10 AM, Ronny Julian <k4rjjradio@...> wrote:
 

I have decided this is not for me.  Selling/trading  the whole setup.

Raspberry Pi computer 512Mb B board
Clear case
2 amp PS from MCM

Raspberry Pi TNC-X kit  Unbuilt

13 (yep 13) port USB powered hub

USB Bluetooth dongle
USB sound card adapter
USB WiFi adaptor.  Small type that has removable antenna SMA type
HDMI to VGA converter cable 15 pin D-Sub type for PC monitor
No SD card included.
All in one box shipped CONUS only for $80 Paypal

I will not separate items but I will consider even trades (u ship I ship) for other Amateur radio gear.

Email DIRECT to k4rjjradio@... for Paypal instructions and/or offers.  I may be slow to respond on Sunday but I will get back to you.

Thanks!

Ronny
K4RJJ



Re: FS: Rpi kit and loaded Rpi

Kerry McKenzie <kermck@...>
 

Greetings Ron
I am hearing you loud and clear,.... and have almost put the whole lot under the wheels of my car on more than one occasion, and have wasted 2 months and a lot of other peoples time trying to get my head around linux and I have a small IT business, microsoft based.
However when you are dealing with something that is free to begin with,... you cannot expect it to work every time or the commands to be the same for every different type there is.
I can see that linux has a long way to go before the average pc user could even try and use it. And i have to say these RPI's leave me for dead.

--
Kind Regards
Kerry McKenzie

PO Box 4492
Kirwan QLD 4817
Australia


Re: Another alternaive to linix?

Richard Bown <richard@...>
 

On Sun, 14 Apr 2013 12:13:02 +0100
Andy Pevy <andypevy@gmail.com> wrote:

Goodness gracious no, back to the dark ages.....
That makes Darwins theory of evolution questionable !


On 14 April 2013 12:03, Kerry McKenzie <kermck@gmail.com> wrote:

**


Greetings all
bingo!! yes there is life as an alternative to Linux for the PI,.... as
I happened along this after yet another frustrating weekend of "wasted
time" with linux.
The best thing is the commands don't change with the flavor like linux
does and they are standard dos.
I guess its only going to be a matter of time before there will be
alternatives to linux for the PI and I have to say that personally I
cant wait.
check out the link below

http://rpix86.patrickaalto.com/rblog.html

--
Kind Regards
Kerry McKenzie

PO Box 4492
Kirwan QLD 4817
Australia




--
--
Best wishes / 73
Richard Bown

Email : richard@g8jvm.info
HTTP :http://www.g8jvm.info
nil carborundum a illegitemis
##################################################################################
Ham Call G8JVM . OS Fedora FC18 x86_64 on a Dell Insiron N5030 laptop
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W ( degs+mins )
QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 350W, 70cms 200W
Microwave 23 cms 140W, 13 cms 100W, 6 cms 0W & 3cms 5W
##################################################################################
Please do not use the e-mail address of richard@g8jvm.com
Mail hosted by 1and1, Domain screwed up by 1and1 and Freeparking


Re: NEWBIE: FROM SW MIAMI, FL LOOKING FOR MENTOR.

Kerry McKenzie <kermck@...>
 

Greetings all
Eldon
I,m sorry but you and so many others who mean well miss the point totally,..... the whole problem with this linux stuff as from a total newbies prospective if you don't know the command that you require how in gods name
can you look it up?

its like trying to explain to an African tribesman in the middle of a deep jungle that you mobile phone has a flat battery !! and the poor bugger looks back at you and says whats a battery??

The biggest problem with linux is the users, as they cannot get down to level of us newbies to even begin to understand that our level of knowledge is almost zero.

You got it right when you quoted "BTW, things are only simple, when you know." and trust me when you don't Eldon it a hell of a climb up the mountain.

2 months into linux and i have gotten nowhere, and by god i have wasted some hours on this.

I mean nobody any disrespect but i for one am finding it near on impossible to understand much at all about linux and can see why windows wins hands down.

regards Kerry VK4TUB


Eldon Brown wrote:

And, . . of course, "man -k" is you friend.

Try "man -k <some key word>". For example: man -k printer

The "-k" option will create a list of commands which contains the "key word" in the description line.

If the created command list (command name as listed on the left) is followed by something other that "(1)", then to access the man page the "number" must be used with the man command, for example:

man 8 lpadmin



Regards,
Eldon Brown
BTW, things are only simple, when you know.

73 - Eldon - WA0UWH - CN88xc - http://WA0UWH.blogspot.com/




On Sun, Mar 31, 2013 at 6:31 AM, John Lawrence <ne3e001@gmail.com <mailto:ne3e001@gmail.com>> wrote:

You can also try the man (for manual ) command for help. If you
know the command you are looking for help on try man (command). If
not man ?

Info is another command. Also use google. Login in and register,
then look throughthe forums at linuxquestions.org
<http://linuxquestions.org>, or ofcourse look at raspberrypi.org
<http://raspberrypi.org>.


--
Kind Regards
Kerry McKenzie

PO Box 4492
Kirwan QLD 4817
Australia


Re: Another alternaive to linux?

JJ
 

On 13-04-14 08:03 AM, Kerry McKenzie wrote:
 

Greetings all
bingo!! yes there is life as an alternative to Linux for the PI,.... as
I happened along this after yet another frustrating weekend of "wasted
time" with linux.
The best thing is the commands don't change with the flavor like linux
does and they are standard dos.
I guess its only going to be a matter of time before there will be
alternatives to linux for the PI and I have to say that personally I
cant wait.
check out the link below

http://rpix86.patrickaalto.com/rblog.html

--
Kind Regards
Kerry McKenzie

PO Box 4492
Kirwan QLD 4817
Australia

linUx is user friendly, it's just picky about it's friends, hi hi!


Re: Another alternaive to linix?

Stephen <squirrox@...>
 

Hi Kerry,

I don't know if you use an Apple Mac but if you do a knowledge of Linux can come in handy. I managed to recover an unusable Mac yesterday to full working order with 4 command lines which I learned from using Linux.

There is a complete listing of alternative operating systems here :-

http://en.wikipedia.org/wiki/Raspberry_Pi

I also know that some really old school operating systems are available for it, including George 3 (an operating system for ICL1900 computers), and I believe various DEC operating systems may well have been ported.

73s Steve G0XAR

--- In Raspberry_Pi_4-Ham_RADIO@yahoogroups.com, Kerry McKenzie <kermck@...> wrote:

Greetings all
bingo!! yes there is life as an alternative to Linux for the PI,.... as
I happened along this after yet another frustrating weekend of "wasted
time" with linux.
The best thing is the commands don't change with the flavor like linux
does and they are standard dos.
I guess its only going to be a matter of time before there will be
alternatives to linux for the PI and I have to say that personally I
cant wait.
check out the link below

http://rpix86.patrickaalto.com/rblog.html

--
Kind Regards
Kerry McKenzie

PO Box 4492
Kirwan QLD 4817
Australia


Re: Another alternaive to linix?

 

Goodness gracious no, back to the dark ages.....


On 14 April 2013 12:03, Kerry McKenzie <kermck@...> wrote:
 

Greetings all
bingo!! yes there is life as an alternative to Linux for the PI,.... as
I happened along this after yet another frustrating weekend of "wasted
time" with linux.
The best thing is the commands don't change with the flavor like linux
does and they are standard dos.
I guess its only going to be a matter of time before there will be
alternatives to linux for the PI and I have to say that personally I
cant wait.
check out the link below

http://rpix86.patrickaalto.com/rblog.html

--
Kind Regards
Kerry McKenzie

PO Box 4492
Kirwan QLD 4817
Australia



Re: Another alternaive to linix?

Kerry McKenzie <kermck@...>
 

Greetings all
bingo!! yes there is life as an alternative to Linux for the PI,.... as I happened along this after yet another frustrating weekend of "wasted time" with linux.
The best thing is the commands don't change with the flavor like linux does and they are standard dos.
I guess its only going to be a matter of time before there will be alternatives to linux for the PI and I have to say that personally I cant wait.
check out the link below

http://rpix86.patrickaalto.com/rblog.html

--
Kind Regards
Kerry McKenzie

PO Box 4492
Kirwan QLD 4817
Australia


Re: FS: Rpi kit and loaded Rpi

Ronny Julian <k4rjjradio@...>
 

Sold.


On Sun, Apr 14, 2013 at 2:10 AM, Ronny Julian <k4rjjradio@...> wrote:
I have decided this is not for me.  Selling/trading  the whole setup.

Raspberry Pi computer 512Mb B board
Clear case
2 amp PS from MCM

Raspberry Pi TNC-X kit  Unbuilt

13 (yep 13) port USB powered hub

USB Bluetooth dongle
USB sound card adapter
USB WiFi adaptor.  Small type that has removable antenna SMA type
HDMI to VGA converter cable 15 pin D-Sub type for PC monitor
No SD card included.
All in one box shipped CONUS only for $80 Paypal

I will not separate items but I will consider even trades (u ship I ship) for other Amateur radio gear.

Email DIRECT to k4rjjradio@... for Paypal instructions and/or offers.  I may be slow to respond on Sunday but I will get back to you.

Thanks!

Ronny
K4RJJ



FS: Rpi kit and loaded Rpi

Ronny Julian <k4rjjradio@...>
 

I have decided this is not for me.  Selling/trading  the whole setup.

Raspberry Pi computer 512Mb B board
Clear case
2 amp PS from MCM

Raspberry Pi TNC-X kit  Unbuilt

13 (yep 13) port USB powered hub

USB Bluetooth dongle
USB sound card adapter
USB WiFi adaptor.  Small type that has removable antenna SMA type
HDMI to VGA converter cable 15 pin D-Sub type for PC monitor
No SD card included.
All in one box shipped CONUS only for $80 Paypal

I will not separate items but I will consider even trades (u ship I ship) for other Amateur radio gear.

Email DIRECT to k4rjjradio@... for Paypal instructions and/or offers.  I may be slow to respond on Sunday but I will get back to you.

Thanks!

Ronny
K4RJJ


Re: Powering the Raspberry & TNC.

Charles Gallo
 

On 4/7/2013 Robert Nickels wrote:

Switchers are noisy. Not just ripple or conducted noise on the power
leads and back onto the AC line, which can be mitigated, but they
radiate EMI as well. If you start unplugging things with a sensitive
receiver going, I'll bet you find this to be true.
Robert,
switchers CAN be noisy, but not always. "Back when' I was an electronics tech, who went on to run an environmental test lab, and part of my job was to arrange for EMI/RFI testing of 'stuff', including switching power supplies, which the company made (Nope, you can't buy them, they are out of business). Anyway, I'd put any of our switching units up against any of our linear supplies, but we KNEW we had to meet some serious EMI and RFI criteria, some to classified level. Our basic was RE, CE, RS and CS 01 thru 03

Of course, you pay for this, but


--

--
Charlie
www.baysidephoto.com
www.thegallos.com


Re: Powering the Raspberry & TNC.

Alan Melia
 

Well not exactly! You need a capacitor and a load. The capacitor charges to the peak rectifed voltage, then decays as the sinewave falls away. On the next half cycle no current flows into the cap until the sinewave exceeds the reservoir capacitor voltage, then there is a big current spike as the cap charges to peak voltage again. The current spike is a few msec wide but it can be several amps even on a small unit with a big reservoir cap.

Alan
G3NYK

----- Original Message -----
From: "Javier Henderson" <javier@kjsl.org>
To: <Raspberry_Pi_4-Ham_RADIO@yahoogroups.com>
Cc: <Raspberry_Pi_4-Ham_RADIO@yahoogroups.com>
Sent: Saturday, April 13, 2013 11:08 PM
Subject: Re: [Raspberry_Pi_4-Ham_RADIO] Re: Powering the Raspberry & TNC.




On Apr 13, 2013, at 17:35, Richard Bown <richard@g8jvm.info> wrote:

On Sat, 13 Apr 2013 17:04:11 -0400
Jim Thisdale <n1jmm1@gmail.com> wrote:

Even in the old fashion 'linear' supplies there is still switching components, namely those
rectifiers/diodes/bridges. The big heavy transformers tend to radiate quite a large magnetic
field, often affecting radio's with-in 3 feet of the transformer. There is definitely pros & cons
to both types but a good switcher is much more efficient, clean, quiet, compact, light weight and
doesn't radiate that much. Of course there are switchers that are not as well designed/made.

-Jim- N1JMM, KB1YPL_B
Visit my Pi running ircddb, dvrptr, Apache & many other things:
Please explain how a diode or bride rectifier switches on a sinusoidal waveform

this should be interesting
The switching occurs as each diodes goes from on to off.

-jav

------------------------------------

Yahoo! Groups Links



Re: Powering the Raspberry & TNC.

Richard Bown <richard@...>
 

On Sat, 13 Apr 2013 18:08:13 -0400
Javier Henderson <javier@kjsl.org> wrote:



On Apr 13, 2013, at 17:35, Richard Bown <richard@g8jvm.info> wrote:

On Sat, 13 Apr 2013 17:04:11 -0400
Jim Thisdale <n1jmm1@gmail.com> wrote:

Even in the old fashion 'linear' supplies there is still switching components, namely those
rectifiers/diodes/bridges. The big heavy transformers tend to radiate quite a large magnetic
field, often affecting radio's with-in 3 feet of the transformer. There is definitely pros &
cons to both types but a good switcher is much more efficient, clean, quiet, compact, light
weight and doesn't radiate that much. Of course there are switchers that are not as well
designed/made.

-Jim- N1JMM, KB1YPL_B
Visit my Pi running ircddb, dvrptr, Apache & many other things:
Please explain how a diode or bride rectifier switches on a sinusoidal waveform

this should be interesting
The switching occurs as each diodes goes from on to off.

-jav
Yes at 0.5V for a silicon diode and 200mV for Schottky that is not the same as switching in a SMPS

--
--
Best wishes / 73
Richard Bown

Email : richard@g8jvm.info
HTTP :http://www.g8jvm.info
nil carborundum a illegitemis
##################################################################################
Ham Call G8JVM . OS Fedora FC18 x86_64 on a Dell Insiron N5030 laptop
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W ( degs+mins )
QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 350W, 70cms 200W
Microwave 23 cms 140W, 13 cms 100W, 6 cms 0W & 3cms 5W
##################################################################################
Please do not use the e-mail address of richard@g8jvm.com
Mail hosted by 1and1, Domain screwed up by 1and1 and Freeparking


Re: Powering the Raspberry & TNC.

Ray Wells
 

If I had a transformer that affected a receiver three feet away I'd give it to someone who owns a boat. If I had a receiver that was affected by the magnetic field of a transformer three feet away I also give that to the fellow with the boat.

RFI from bridge rectifiers? Yep, had that, right up to the 6m band. I didn't care why it happened, I just went ahead and located the source - a 35A bridge rectifier. Problem cured with a 0.01uF ceramic cap across the AC terminals of the rectifier.

Ray vk2tv

On 14/04/13 07:04, Jim Thisdale wrote:
 

Even in the old fashion 'linear' supplies there is still switching components, namely those
rectifiers/diodes/bridges. The big heavy transformers tend to radiate quite a large magnetic field,
often affecting radio's with-in 3 feet of the transformer. There is definitely pros & cons to both
types but a good switcher is much more efficient, clean, quiet, compact, light weight and doesn't
radiate that much. Of course there are switchers that are not as well designed/made.

-Jim- N1JMM, KB1YPL_B
Visit my Pi running ircddb, dvrptr, Apache & many other things:
http://n1jmm.no-ip.org

On 4/7/13 9:50 AM, Robert Nickels wrote:
> I guess I'll add my two cents worth on this issue since everything
> that's been said is missing what to me is the most important point.
>
> Switchers are noisy. Not just ripple or conducted noise on the power
> leads and back onto the AC line, which can be mitigated, but they
> radiate EMI as well. If you start unplugging things with a sensitive
> receiver going, I'll bet you find this to be true.
>
> That's why I'm running my Pi and associated devices from a 5 volt 3 A
> linear power supply from the dark ages (i.e. 1970s). My 5 mW Wsbrry Pi
> "transmitter" is being heard up to 10000 km away, which I attribute in
> small part to having as clean a signal as possible to begin with. I
> don't have lab measurements to back it up but in my opinion, if all you
> want to do is learn linux and run the GUI, use a $5 phone charger and
> have fun. But if you're interested in having a radio anywhere nearby, a
> linear power supply with no switching elements anywhere in sight is the
> best way to go. Alert the 'green police', but the last thing I'm going
> to worry about is the piddly difference in power consumption.
>
> 73, Bob W9RAN
>



Re: Powering the Raspberry & TNC.

Javier Henderson <javier@...>
 

On Apr 13, 2013, at 17:35, Richard Bown <richard@g8jvm.info> wrote:

On Sat, 13 Apr 2013 17:04:11 -0400
Jim Thisdale <n1jmm1@gmail.com> wrote:

Even in the old fashion 'linear' supplies there is still switching components, namely those
rectifiers/diodes/bridges. The big heavy transformers tend to radiate quite a large magnetic
field, often affecting radio's with-in 3 feet of the transformer. There is definitely pros & cons
to both types but a good switcher is much more efficient, clean, quiet, compact, light weight and
doesn't radiate that much. Of course there are switchers that are not as well designed/made.

-Jim- N1JMM, KB1YPL_B
Visit my Pi running ircddb, dvrptr, Apache & many other things:
Please explain how a diode or bride rectifier switches on a sinusoidal waveform

this should be interesting
The switching occurs as each diodes goes from on to off.

-jav


Re: Powering the Raspberry & TNC.

Richard Bown <richard@...>
 

On Sat, 13 Apr 2013 17:04:11 -0400
Jim Thisdale <n1jmm1@gmail.com> wrote:

Even in the old fashion 'linear' supplies there is still switching components, namely those
rectifiers/diodes/bridges. The big heavy transformers tend to radiate quite a large magnetic
field, often affecting radio's with-in 3 feet of the transformer. There is definitely pros & cons
to both types but a good switcher is much more efficient, clean, quiet, compact, light weight and
doesn't radiate that much. Of course there are switchers that are not as well designed/made.

-Jim- N1JMM, KB1YPL_B
Visit my Pi running ircddb, dvrptr, Apache & many other things:
Please explain how a diode or bride rectifier switches on a sinusoidal waveform

this should be interesting

--
--
Best wishes / 73
Richard Bown

Email : richard@g8jvm.info
HTTP :http://www.g8jvm.info
nil carborundum a illegitemis
##################################################################################
Ham Call G8JVM . OS Fedora FC18 x86_64 on a Dell Insiron N5030 laptop
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W ( degs+mins )
QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 350W, 70cms 200W
Microwave 23 cms 140W, 13 cms 100W, 6 cms 0W & 3cms 5W
##################################################################################
Please do not use the e-mail address of richard@g8jvm.com
Mail hosted by 1and1, Domain screwed up by 1and1 and Freeparking


Re: Powering the Raspberry & TNC.

Jim Thisdale
 

Even in the old fashion 'linear' supplies there is still switching components, namely those rectifiers/diodes/bridges. The big heavy transformers tend to radiate quite a large magnetic field, often affecting radio's with-in 3 feet of the transformer. There is definitely pros & cons to both types but a good switcher is much more efficient, clean, quiet, compact, light weight and doesn't radiate that much. Of course there are switchers that are not as well designed/made.

-Jim- N1JMM, KB1YPL_B
Visit my Pi running ircddb, dvrptr, Apache & many other things:
http://n1jmm.no-ip.org

On 4/7/13 9:50 AM, Robert Nickels wrote:
I guess I'll add my two cents worth on this issue since everything
that's been said is missing what to me is the most important point.

Switchers are noisy. Not just ripple or conducted noise on the power
leads and back onto the AC line, which can be mitigated, but they
radiate EMI as well. If you start unplugging things with a sensitive
receiver going, I'll bet you find this to be true.

That's why I'm running my Pi and associated devices from a 5 volt 3 A
linear power supply from the dark ages (i.e. 1970s). My 5 mW Wsbrry Pi
"transmitter" is being heard up to 10000 km away, which I attribute in
small part to having as clean a signal as possible to begin with. I
don't have lab measurements to back it up but in my opinion, if all you
want to do is learn linux and run the GUI, use a $5 phone charger and
have fun. But if you're interested in having a radio anywhere nearby, a
linear power supply with no switching elements anywhere in sight is the
best way to go. Alert the 'green police', but the last thing I'm going
to worry about is the piddly difference in power consumption.

73, Bob W9RAN

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