Date   

Re: Changing Desktop

WB5NHL
 

After starting x-windows (aka LXDE desktop) simply right click anywhere on the screen and select (left click) desktop preferences.  This pops up a window allowing you to change the background and how it's shown aka center, stretch etc.

Here is the google'd reference
http://www.linuceum.com/Distros/osDesktopConfigLXDE.php




On 11/11/2012 7:28 PM, Brian wrote:
 

I know this sounds crazy, but I can't get the desktop to change.

I've customised a software 'image' for my school IT department as a favour (I teach Mathematics, not IT), and wanted to add a custom desktop with the school logo.

BUT, the background won't change! I've copied the file across etc. and used the 'preferences' but it simply will not change.

The image includes: SSH server, VNCServer x 2, WebServer, and FTP Server.

73
Brian

G8OSN/W8OSN
www.g8osn.net



Changing Desktop

Brian Reay
 

I know this sounds crazy, but I can't get the desktop to change.

I've customised a software 'image' for my school IT department as a favour (I teach Mathematics, not IT), and wanted to add a custom desktop with the school logo.

BUT, the background won't change! I've copied the file across etc. and used the 'preferences' but it simply will not change.

The image includes: SSH server, VNCServer x 2, WebServer, and FTP Server.

73
Brian

G8OSN/W8OSN
www.g8osn.net


Re: Raspi and Etherkit open beacon

Alan Melia
 

Put an "l" in the end of the URL its dot html
Alan
G3NYK

----- Original Message -----
From: "c6alk" <K7RE@...>
To: <Raspberry_Pi_4-Ham_RADIO@...>
Sent: Sunday, November 11, 2012 4:11 PM
Subject: [Raspberry_Pi_4-Ham_RADIO] Re: Raspi and Etherkit open beacon


I am very interested in WSPR via RP. Your first link appears broken to me. Can you check please?

Thanks
Brian K7RE

--- In Raspberry_Pi_4-Ham_RADIO@..., "Philip" <pcteee@...> wrote:

Got a huge amount of help with this so with that and a lot of head scratching, I got my Etherkit Open Beacon running on WSPR using the Pi
to enter all the commands and to do the timing via USB.

http://www.etherkit.com/transmitters/openbeacon.htm

Quite a low power alternative to being tethered to my main PC.

Here's a link to the RaspberryPi forum thread where I got the help to
get this up and running..

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=41&t=22587


Regards
Philip G4JVF



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

Yahoo! Groups Links



Re: Raspi and Etherkit open beacon

Siegfried Jackstien
 

-----Ursprüngliche Nachricht-----
Von: Raspberry_Pi_4-Ham_RADIO@... [mailto:Raspberry_Pi_4-
Ham_RADIO@...] Im Auftrag von c6alk
Gesendet: Sonntag, 11. November 2012 16:12
An: Raspberry_Pi_4-Ham_RADIO@...
Betreff: [Raspberry_Pi_4-Ham_RADIO] Re: Raspi and Etherkit open beacon



I am very interested in WSPR via RP. Your first link appears broken to me.
Can you check please?

Thanks
Brian K7RE

--- In Raspberry_Pi_4-Ham_RADIO@... <mailto:Raspberry_Pi_4-
Ham_RADIO%40yahoogroups.com> , "Philip" <pcteee@...> wrote:

Got a huge amount of help with this so with that and a lot of head
scratching, I got my Etherkit Open Beacon running on WSPR using the Pi
to enter all the commands and to do the timing via USB.

http://www.etherkit.com/transmitters/openbeacon.htm

Quite a low power alternative to being tethered to my main PC.

Here's a link to the RaspberryPi forum thread where I got the help to
get this up and running..

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=41&t=22587


Regards
Philip G4JVF



Re: Raspi and Etherkit open beacon

Brian
 

I am very interested in WSPR via RP. Your first link appears broken to me. Can you check please?

Thanks
Brian K7RE

--- In Raspberry_Pi_4-Ham_RADIO@..., "Philip" <pcteee@...> wrote:

Got a huge amount of help with this so with that and a lot of head scratching, I got my Etherkit Open Beacon running on WSPR using the Pi
to enter all the commands and to do the timing via USB.

http://www.etherkit.com/transmitters/openbeacon.htm

Quite a low power alternative to being tethered to my main PC.

Here's a link to the RaspberryPi forum thread where I got the help to
get this up and running..

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=41&t=22587


Regards
Philip G4JVF


Re: Greetings from New member

g0ukb
 

The 'fix' for sound to work well as a media centre is to use HDMI :)  HDMI sound is excellent but the built in analog sound drivers crackle badly every time they are started and stopped. AFAIK there has not been a fix for this and iti s supposed to be quite hard to ramp up the Alsa volume on starting a sound stream.

Normally to change soundcards in linux you can use Alsamixer - I haven't got an external soundcard for my shack Pi yet (the other PI is indeed a media centre using HDMI for both sound and video) so I haven't tried this. I will be interested in your results when you get an external USB sound card working to know whether the Alsa crackling problem is only on the built-in card or whether it occurs on USB cards too. I've been playing about with speech synth and the startup-stop noise is annoying.

Brian G0UKB


Re: usb sound?

Alan Melia
 

OK sorry that idea didn't work. I am sure I have seen a "fix" somewhere. One of the mags describes using the raspi as a media centre and I am sure that would not accept poor audio.....so it may involve an non-distro download.
Good luck with it
Alan
G3NYK

----- Original Message -----
From: "kb9mwr" <kb9mwr@...>
To: <Raspberry_Pi_4-Ham_RADIO@...>
Sent: Sunday, November 11, 2012 4:21 AM
Subject: [Raspberry_Pi_4-Ham_RADIO] Re: usb sound?


Thanks, that was the first thing I did however.

All my USB sound cards are CM108 chipset based.

I just ordered a Griffin iMic, and will see if I get different results when it arrives.



--- In Raspberry_Pi_4-Ham_RADIO@..., "Alan Melia" <Alan.Melia@...> wrote:

A number og the mags covering the raspi (Linux Format) have noted on the
poor quality of the audio. I would make sure you have the absolutely latest
version of rasbian, because I think it has been updated since the first
edition was posted. Possibly after a few "raspberries" on this subject :-))

Alan
G3NYK
----- Original Message -----
From: "kb9mwr" <kb9mwr@...>
To: <Raspberry_Pi_4-Ham_RADIO@...>
Sent: Saturday, November 10, 2012 8:39 PM
Subject: [Raspberry_Pi_4-Ham_RADIO] usb sound?


I have been playing around with USB soundcards (as I need a line/mic input)

They are detected, and I can set them as the default audio device, but
when I try and make recordings and play them back they sound terrible.

Does anyone have any experience in this area?

I have read things about sample/rate conversion problems and tried some of
the remedies but am not getting anywhere.



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

Yahoo! Groups Links





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

Yahoo! Groups Links



Re: usb sound?

kb9mwr <kb9mwr@...>
 

Thanks, that was the first thing I did however.

All my USB sound cards are CM108 chipset based.

I just ordered a Griffin iMic, and will see if I get different results when it arrives.

--- In Raspberry_Pi_4-Ham_RADIO@..., "Alan Melia" <Alan.Melia@...> wrote:

A number og the mags covering the raspi (Linux Format) have noted on the
poor quality of the audio. I would make sure you have the absolutely latest
version of rasbian, because I think it has been updated since the first
edition was posted. Possibly after a few "raspberries" on this subject :-))

Alan
G3NYK
----- Original Message -----
From: "kb9mwr" <kb9mwr@...>
To: <Raspberry_Pi_4-Ham_RADIO@...>
Sent: Saturday, November 10, 2012 8:39 PM
Subject: [Raspberry_Pi_4-Ham_RADIO] usb sound?


I have been playing around with USB soundcards (as I need a line/mic input)

They are detected, and I can set them as the default audio device, but
when I try and make recordings and play them back they sound terrible.

Does anyone have any experience in this area?

I have read things about sample/rate conversion problems and tried some of
the remedies but am not getting anywhere.



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

Yahoo! Groups Links



Re: usb sound?

Alan Melia
 

A number og the mags covering the raspi (Linux Format) have noted on the poor quality of the audio. I would make sure you have the absolutely latest version of rasbian, because I think it has been updated since the first edition was posted. Possibly after a few "raspberries" on this subject :-))

Alan
G3NYK

----- Original Message -----
From: "kb9mwr" <kb9mwr@...>
To: <Raspberry_Pi_4-Ham_RADIO@...>
Sent: Saturday, November 10, 2012 8:39 PM
Subject: [Raspberry_Pi_4-Ham_RADIO] usb sound?


I have been playing around with USB soundcards (as I need a line/mic input)

They are detected, and I can set them as the default audio device, but when I try and make recordings and play them back they sound terrible.

Does anyone have any experience in this area?

I have read things about sample/rate conversion problems and tried some of the remedies but am not getting anywhere.



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

Yahoo! Groups Links



usb sound?

kb9mwr <kb9mwr@...>
 

I have been playing around with USB soundcards (as I need a line/mic input)

They are detected, and I can set them as the default audio device, but when I try and make recordings and play them back they sound terrible.

Does anyone have any experience in this area?

I have read things about sample/rate conversion problems and tried some of the remedies but am not getting anywhere.


Raspi and Etherkit open beacon

Philip <pcteee@...>
 

Got a huge amount of help with this so with that and a lot of head scratching, I got my Etherkit Open Beacon running on WSPR using the Pi
to enter all the commands and to do the timing via USB.

http://www.etherkit.com/transmitters/openbeacon.htm

Quite a low power alternative to being tethered to my main PC.

Here's a link to the RaspberryPi forum thread where I got the help to
get this up and running..

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=41&t=22587


Regards
Philip G4JVF


Re: Greetings from New member

gkidsonpetlem <gordon@...>
 

Thanks, Will check it out.

73.

Gordon

--- In Raspberry_Pi_4-Ham_RADIO@..., Perry Chamberlain <canoeman@...> wrote:

Adafriut makes a nice gps sheil that connects up to R PI, and a active puck antenna that
Connect to it.
Check out adafruit.com.

Ke6anm


Sent from my iPad

On Nov 7, 2012, at 4:42 AM, "gkidsonpetlem" <gordon@...> wrote:

Hi All.

I'm Gordon, 2e0KPG, located in South Hampshire, UK.

I'm a not very experienced Ham, and even less experienced in Linux - I've ordered, but not yet recieved, my RPi. I have little programming experience in programming, but reasonable experience with netwroking and non-standard software in Windows (back to 3.1...)

I have several ideas for applications for my Pi, I can imagine more than one may be needed in future:

In Car Entertainment/Navigation - I currently use a butchered
old XP laptop hooked up to a lilliput Touchscreen, but its a
cumbersome setup. Anyone know of a GPS Dongle workw with RPi?

APRS/Marine AIS Igate - I use both these technologies, but find
coverage locally to me is very limited. I'd like a setup which
recieves AIS and gates to internet, and an APRS Igate to
web/ digipeater on 144.800... Possibly using one of the really
cheap chinese handies as a transciever on ham side?

Mobile APRS message handler/mapping software/BEacon - Interested
in the TNC that John is working on here... Any chance of adding
a GPS as well??

So, Its evident my main ham use is APRS - I currently use an old XP toshiba laptop, and one of the Cross-country wireless tnc/tracker (USB version). I then hook it into either my antique Yaesu Ft8100, or my little Alinco handy. The mobile rig in my Land Rover works best, as I find that 5 watts from handy is not quite enough in my area (low-lying, fairly heavily built up, hills inland...)

In an ideal world, I'd probably build a box containing a TNC/tracker, a 10w transciever (fixed on 144.800) and a Pi (if they turn out to be powerful enough) so I can just plug it into power, an antenna, keyboard, mouse and VDU and off we go... Messaging, tracking, mapping etc all in one box... Anyone done anything similar?

Anyways,
That's me, and what I'm working on...

73
Gordon 2E0KPG


Re: Greetings from New member

jakefromcf
 

Regarding Power of Pi

Benchmark find all the primes up to 10,000,000 with sieve program (no floating point involved) written in C compiled on target platform no optisimation.
Pi 9 secs
XP 1.8 GB laptop 1.8 sec
Macbook  .9 sec
8 core 3.4 GB Xeon .9 sec (but could run 4 copies simultaneously without slowing)


 #include
 int main(int argc, char **argv) {
        int     top_value = 10000000;
        int     count     = top_value - 1;
        int     *array    = calloc( top_value + 1, sizeof(int));
        int     i, prime, multiple;
        /* mark each int as potentially prime                                    */
        for (i=2; i <= top_value; ++i) 
                array[i] = 1;
        /* for each starting prime, mark its every multiple as non-prime         */
        for (prime = 2; prime <= top_value; ++prime)
        {
                if (array[prime])
                        for (multiple = 2*prime; multiple <= top_value; multiple += prime)
                                if (array[multiple]) {
                                        array[multiple] = 0;
                                        --count;
                                }
        }
        /* Now that we have marked all multiples of primes as non-prime, print   */
        /* the remaining numbers that fell through the sieve, and are thus prime */
        for (i=2; i <= top_value; ++i)
        {
        //        if (array[i])
//                      printf("%d ", i);

  

       }
        printf("\n\n %d primes up to %d found.\n", count, top_value);
        exit(0);
 }




Re: Just joined

Siegfried Jackstien
 

Hi philip

I am a complete newbie in linux ...

What I plan is to build a board for raspi and rtl dongle (or fcd)

That board should contain several switched filters, pream and several
antenna socket ... selectable via the gpio pins (or via usb?!? So also in
shack usable without raspi???)

Now I am collecting parts for a filter board with all bands needed from 50
megs to 2 gig (range of rtl and old fcd) ... maybe with rf mixer and also
preamp / and damping ... for shortwave

The tricky thing is to find the filters for the bands of interest ... or
homebrew them (that is a bit more difficult)

First setup will be a filter board ... switchable from rotary knob ... later
selectable via gpio and/or usb

... as far as I know the "parts" (programming blocks) for switching
something over the gpio pins are ready made ... should not be tooo difficult
to build my "dream net sdr" :-)

Dg9bfc

Sigi

Ps I will come back to you if I have my raspi and have trouble with the
setup .... thanks for offering help

-----Ursprüngliche Nachricht-----
Von: Raspberry_Pi_4-Ham_RADIO@... [mailto:Raspberry_Pi_4-
Ham_RADIO@...] Im Auftrag von Philip
Gesendet: Mittwoch, 7. November 2012 16:15
An: Raspberry_Pi_4-Ham_RADIO@...
Betreff: [Raspberry_Pi_4-Ham_RADIO] Re: Just joined



Hi Sigi

Yes, by all means ask away..
I'm a novice at this to be honest but we can all pool
resources and ideas...

Philip G4JVF

--- In Raspberry_Pi_4-Ham_RADIO@... <mailto:Raspberry_Pi_4-
Ham_RADIO%40yahoogroups.com> , "siegfried jackstien"
<siegfried.jackstien@...> wrote:

Hi Philip

I do not have a raspberry (yet)... but I plan to order one for exactly
that
(remote sdr on the raspi acting as i/q server) ... may I ask you some
questions if I have my raspi and have trouble with the setup ?!?

Greetz dg9bfc

Sigi


-----Ursprüngliche Nachricht-----
Von: Raspberry_Pi_4-Ham_RADIO@... <mailto:Raspberry_Pi_4-
Ham_RADIO%40yahoogroups.com> [mailto:Raspberry_Pi_4-
Ham_RADIO@... <mailto:Ham_RADIO%40yahoogroups.com> ] Im
Auftrag von Philip
Gesendet: Montag, 5. November 2012 13:06
An: Raspberry_Pi_4-Ham_RADIO@... <mailto:Raspberry_Pi_4-
Ham_RADIO%40yahoogroups.com>
Betreff: [Raspberry_Pi_4-Ham_RADIO] Just joined



Hi folks, thanks for having me...

Names Philip (G4JVF), ex TV service engineer, wrong side of 65, not
the
sharpest knife in the drawer nowadays and to cap it all, a total noob
with
Linux.

Anyhoo, I like tinkering with QRP beacons on WSPR and QRSS so I had
thoughts of maybe getting a Raspberry Pi to somehow integrate with all
this.
Last night, following instructions on the HamRadioScience site, I got
my
Pi to serve via TCP, data from an RTL dongle to SDR# on my PC.
Works very nicely...

Holy grail to me would be to get something like ARGO running on a Pi
for
low power usage QRSS grabber sessions but maybe that's not
possible....I
don't know..

OK, off to read through all the posts and files on here...

Regards
Philip G4JVF






Re: Greetings from New member

Perry Chamberlain <canoeman@...>
 

Adafriut makes a nice gps sheil that connects up to R PI, and a active puck antenna that 
Connect to it.
Check out adafruit.com.

Ke6anm



On Nov 7, 2012, at 4:42 AM, "gkidsonpetlem" <gordon@...> wrote:

 

Hi All.

I'm Gordon, 2e0KPG, located in South Hampshire, UK.

I'm a not very experienced Ham, and even less experienced in Linux - I've ordered, but not yet recieved, my RPi. I have little programming experience in programming, but reasonable experience with netwroking and non-standard software in Windows (back to 3.1...)

I have several ideas for applications for my Pi, I can imagine more than one may be needed in future:

In Car Entertainment/Navigation - I currently use a butchered
old XP laptop hooked up to a lilliput Touchscreen, but its a
cumbersome setup. Anyone know of a GPS Dongle workw with RPi?

APRS/Marine AIS Igate - I use both these technologies, but find
coverage locally to me is very limited. I'd like a setup which
recieves AIS and gates to internet, and an APRS Igate to
web/ digipeater on 144.800... Possibly using one of the really
cheap chinese handies as a transciever on ham side?

Mobile APRS message handler/mapping software/BEacon - Interested
in the TNC that John is working on here... Any chance of adding
a GPS as well??

So, Its evident my main ham use is APRS - I currently use an old XP toshiba laptop, and one of the Cross-country wireless tnc/tracker (USB version). I then hook it into either my antique Yaesu Ft8100, or my little Alinco handy. The mobile rig in my Land Rover works best, as I find that 5 watts from handy is not quite enough in my area (low-lying, fairly heavily built up, hills inland...)

In an ideal world, I'd probably build a box containing a TNC/tracker, a 10w transciever (fixed on 144.800) and a Pi (if they turn out to be powerful enough) so I can just plug it into power, an antenna, keyboard, mouse and VDU and off we go... Messaging, tracking, mapping etc all in one box... Anyone done anything similar?

Anyways,
That's me, and what I'm working on...

73
Gordon 2E0KPG


Re: Just joined

Philip <pcteee@...>
 

Hi Sigi

Yes, by all means ask away..
I'm a novice at this to be honest but we can all pool
resources and ideas...

Philip G4JVF

--- In Raspberry_Pi_4-Ham_RADIO@..., "siegfried jackstien" <siegfried.jackstien@...> wrote:

Hi Philip

I do not have a raspberry (yet)... but I plan to order one for exactly that
(remote sdr on the raspi acting as i/q server) ... may I ask you some
questions if I have my raspi and have trouble with the setup ?!?

Greetz dg9bfc

Sigi


-----Ursprüngliche Nachricht-----
Von: Raspberry_Pi_4-Ham_RADIO@... [mailto:Raspberry_Pi_4-
Ham_RADIO@...] Im Auftrag von Philip
Gesendet: Montag, 5. November 2012 13:06
An: Raspberry_Pi_4-Ham_RADIO@...
Betreff: [Raspberry_Pi_4-Ham_RADIO] Just joined



Hi folks, thanks for having me...

Names Philip (G4JVF), ex TV service engineer, wrong side of 65, not the
sharpest knife in the drawer nowadays and to cap it all, a total noob with
Linux.

Anyhoo, I like tinkering with QRP beacons on WSPR and QRSS so I had
thoughts of maybe getting a Raspberry Pi to somehow integrate with all
this.
Last night, following instructions on the HamRadioScience site, I got my
Pi to serve via TCP, data from an RTL dongle to SDR# on my PC.
Works very nicely...

Holy grail to me would be to get something like ARGO running on a Pi for
low power usage QRSS grabber sessions but maybe that's not possible....I
don't know..

OK, off to read through all the posts and files on here...

Regards
Philip G4JVF




Re: PI TNC - progress report.

Peter
 

Well done John!!!

I hope that you will make these available to the community. Such an incredible idea you have. Can't wait to hear about your progress of your project.

73
Peter

--- In Raspberry_Pi_4-Ham_RADIO@..., "John Wiseman" <john.wiseman@...> wrote:

They are all working here at the moment, but dropbox can be a bit
tempermental at times! If you cant get them after a few attempts let me
konw, and I'll find somewhere else to upload them.

73, John

_____

From: Raspberry_Pi_4-Ham_RADIO@...
[mailto:Raspberry_Pi_4-Ham_RADIO@...] On Behalf Of Perry
Chamberlain
Sent: 05 November 2012 18:40
To: Raspberry_Pi_4-Ham_RADIO@...
Subject: Re: [Raspberry_Pi_4-Ham_RADIO] PI TNC - progress report.





The 0573.png is a dead link for me.


Sent from my iPad

On Nov 5, 2012, at 7:50 AM, "Mike" <mmelnik1@...> wrote:





Very nice job John.

Thanks

Mike N9PMO
<http://www.n9pmo.com> www.n9pmo.com
-----Original Message-----
From: <mailto:Raspberry_Pi_4-Ham_RADIO%40yahoogroups.com>
Raspberry_Pi_4-Ham_RADIO@...
[mailto: <mailto:Raspberry_Pi_4-Ham_RADIO%40yahoogroups.com>
Raspberry_Pi_4-Ham_RADIO@...] On Behalf Of John
Wiseman
Sent: Monday, November 05, 2012 9:12 AM
To: <mailto:Raspberry_Pi_4-Ham_RADIO%40yahoogroups.com>
Raspberry_Pi_4-Ham_RADIO@...
Subject: [Raspberry_Pi_4-Ham_RADIO] PI TNC - progress report.


Hi folk,

The production boards have now arrived, and I've built a couple of them,
Here are some photos of a pi with two TNCs attached.

<https://dl.dropbox.com/u/31910649/PI_1.png>
https://dl.dropbox.com/u/31910649/PI_1.png
<https://dl.dropbox.com/u/31910649/PI_2.png>
https://dl.dropbox.com/u/31910649/PI_2.png
<https://dl.dropbox.com/u/31910649/PI_3.png>
https://dl.dropbox.com/u/31910649/PI_3.png
<https://dl.dropbox.com/u/31910649/PI_4.png>
https://dl.dropbox.com/u/31910649/PI_4.png

As I mentioned in a post earlier today, the RFM22 prototypes are
working, and I hope to have the production boards in 2-3 weeks.

73, John G8BPQ

Hi,

For those new to the group, I have been working on a TNC for use with
the pI that is the same size as the pi and plugs into the expansion
header. The prototype was a TNC-X, with a 26 way header superglued to
board. There is a photo of it on the home page of this group.

I now have two TNC's running, and can connect between them. See photo at
<https://dl.dropbox.com/u/31910649/IMGP0573.png.>
https://dl.dropbox.com/u/31910649/IMGP0573.png. This show the prototype
- the production boards will have a DB9 instead of the Mini-DIN radio
connector. A batch of production boards has been ordered, and should be
here in 2-3 weeks.

I've also built a couple of units using the RMF22B 100 mW 434 Mhz
tranceiver model. They both transmit - I now need to get the receive
side working. There is a photo at
<https://dl.dropbox.com/u/31910649/IMGP0575.png>
https://dl.dropbox.com/u/31910649/IMGP0575.png

I looked at the higher powered (500 mw) RMF12BP, and ordered a couple
for experiments. But when I looked into the module in more detail I
found it was not compatible with the RFM22B, and is less flexible and
more difficult to program. I've since found the RFM23BP, which is a 1
watt unit that is compatible with the RFM22B, so I've ordered a
couple of them for testing, and designed a board that will take either
the 22B or the 23BP. Although it is primarily indended for use with the
PI, it will also have an async port, so it can be used as a standalone
KISS TNC/Radio.


73, John G8BPQ

__,_._
,___


Greetings from New member

gkidsonpetlem <gordon@...>
 

Hi All.

I'm Gordon, 2e0KPG, located in South Hampshire, UK.

I'm a not very experienced Ham, and even less experienced in Linux - I've ordered, but not yet recieved, my RPi. I have little programming experience in programming, but reasonable experience with netwroking and non-standard software in Windows (back to 3.1...)

I have several ideas for applications for my Pi, I can imagine more than one may be needed in future:

In Car Entertainment/Navigation - I currently use a butchered
old XP laptop hooked up to a lilliput Touchscreen, but its a
cumbersome setup. Anyone know of a GPS Dongle workw with RPi?

APRS/Marine AIS Igate - I use both these technologies, but find
coverage locally to me is very limited. I'd like a setup which
recieves AIS and gates to internet, and an APRS Igate to
web/ digipeater on 144.800... Possibly using one of the really
cheap chinese handies as a transciever on ham side?

Mobile APRS message handler/mapping software/BEacon - Interested
in the TNC that John is working on here... Any chance of adding
a GPS as well??


So, Its evident my main ham use is APRS - I currently use an old XP toshiba laptop, and one of the Cross-country wireless tnc/tracker (USB version). I then hook it into either my antique Yaesu Ft8100, or my little Alinco handy. The mobile rig in my Land Rover works best, as I find that 5 watts from handy is not quite enough in my area (low-lying, fairly heavily built up, hills inland...)

In an ideal world, I'd probably build a box containing a TNC/tracker, a 10w transciever (fixed on 144.800) and a Pi (if they turn out to be powerful enough) so I can just plug it into power, an antenna, keyboard, mouse and VDU and off we go... Messaging, tracking, mapping etc all in one box... Anyone done anything similar?

Anyways,
That's me, and what I'm working on...

73
Gordon 2E0KPG


Re: Group Activities.

Siegfried Jackstien
 

I have a nice idea for a net sdr (kind of) ...

Raspberry pi acts as server for raw iq data (so far so good)

Rtl dongle makes the sampling ... decoding is done via sdr sharp
Now the tricky idea:

GPIO pins on the raspberry are used to switch in different filters and added
preamp + different antenna inputs

First of all I plan to build a filter and preamp board ...

That can be used in the shack (filters selected with rotary knob on front of
a shielded metal case)

So it can be used without raspberry only with a rtl stick (or a funcube
dongle) to help rejecting out of band signals

That board is connected to the front knob with a header that can be
disconnected and put on a small driver board (safety for the raspi!!!) and
from there a ribbon cable to the raspi gpio pins

So ... I have to build a filter bank (with preamp)

A second board with coax relays (if you wanna use several antennas)

2 driver boards for the above banks

And a shielded case for all that stuff

... first will be the filters (and the raspberry) and then start to upgrade
step by step

Dg9bfc

Sigi

Last upgrade would be that switching is done direct from sdr sharp!
Depending on frequency

-----Ursprüngliche Nachricht-----
Von: Raspberry_Pi_4-Ham_RADIO@... [mailto:Raspberry_Pi_4-
Ham_RADIO@...] Im Auftrag von Kutche, Jerry (Mitchell) USA
Gesendet: Dienstag, 6. November 2012 19:13
An: Raspberry_Pi_4-Ham_RADIO@...
Betreff: [Raspberry_Pi_4-Ham_RADIO] Group Activities.




If anyone has any files or config examples that they wish to share on
various RPi setups feel free to fill up the files, links, photos, sections
etc...

73 Jerry N9LYA


Group Activities.

Kutche, Jerry (Mitchell) USA <JKutche@...>
 

 
If anyone has any files or config examples that they wish to share on various RPi setups feel free to fill up the files, links, photos, sections etc...
 
73 Jerry N9LYA