Date   

Re: Raspberry Pi

Dan Reynolds
 

Wow, I had no idea there was this much interest in the PI.
That's cool.

I like it but I like playing with the Arduino more. It's more hands on hardware. I've never really been a Linux guy. Although I love the command line in VMware -- weird I know...

Dan -- KB9JLO


Re: 5 watts

Casey
 

Long go when I would tell the guy I was running QRP, and it seemed like they always got a call for supper. One guy in TX commented up front he had just finished eating. A few minutes later when he heard the QRP word, he says "well 73, there's the dinner bell" ~ WHAT are they scared of, is QRP contagious (well, YES it is).

73 de Keith KC9IH
NAQCC 6165, SKCC 9396,
QRP ARCI 5435, Flying Pigs 2926,
GORC 414, MI QRP 1163, 4SQRP, et al


Re: Raspberry Pi

Bill Cromwell
 

On Wed, 2013-04-17 at 10:53 -0500, Tim McDonough N9PUZ wrote:
On 4/17/2013 10:39 AM, Bill Cromwell wrote:

On the Raspberry Pi web site in a FAQ it was mentioned the processor can
be overclocked from something like it's normal ~400 MHz and some of them
will run okay up to 800 MHz. So maybe you meant it is a 'sub 1GHz'
machine.
You are correct. I did in fact mean sub 1 GHz. Just like when I'm
sending code, my fingers and my brain occasionally don't connect well!

73,

Tim N9PUZ
Hi,

I don't usually point at things like that but I really was asking a
question. It's possible for me to misinterpret what I read in that FAQ.
Most of the things I spot are typos and I let most of those slide right
on by. Once in a while a typo is pretty humorous and I'll jump right on
those (evil grin).

I remember how impressed I was with performance when I got a 100 MHz 486
PC in place the old 4.88 MHz XT! The higher speed and wider bus...

My XYL ran indexing on documents in Word Star and we went out for lunch
while it was running. I invited her to run that job on my new computer
and it took something like 2 minutes! We went out for lunch that day to
celebrate and make plans for *her* new computer (grin). I have several
light speed computers here and one has a dual core gizmo in it that
loafs most of the time.

I plan to make the most use of a Pi for field and portable operation in
some of the parks around here. Somebody has said it will run PSK 31 and
some other stuff and I'm sure logging will be trivial.

73,

Bill KU8H


Re: 5 watts or less

Donald Kelly
 

My elmer was K5SAM, Henry (SK) up in Edmond, OK. He mostly operated a homebrew DX100 clone, a 300W homebrew 250TH and a 2B. His main antenna was homemade 20M ground plane with four radials.

 

It was late summer and I had just finished a homebrew 14W 20M CW transceiver and was showing it to Henry in his shack. I was just getting Henry interested in simple QRP gear.

He was a hard sell as he loved his homebrew amp.

 

At the time we had been using the small, flat +5.5vdc battery packs inside Polaroid film packs to power some small transmitters. Two of them would give about 11vdc.

Good enough for small QRP transmitters and DC receivers.

 

Our favorite was a 1W 10M transmitter and though we worked into Europe with a 3 el mono-band beam Henry wasn’t ready to admit QRP was pretty amazing.

 

We were having a few 807’s and listening to the 2B around 4PM Sunday Oklahoma time when Ascension Island came on calling CQ.

 

We were down to only one small 5.5v battery pack but we decided to try using the 20M transceiver TX to make a contact. It was the Beck’s bravado working here.

 

We hooked up and power out was not registering on Henry’s old Heath power meter. Later we figured output was about 50mw and using Henry’s GP with the rusty steel radials ERP was anyone’s guess.

 

BTW - We didn’t have a cable to connect to Henry’s TO keyer so we stuck a short RCA audio cable in the key jack and tapped out a response on the top of the rig.

 

Even though it had taken about 5 minutes to get set up, the DX  station came back right away. It was the normal quick exchange of RST, name and QTH but a solid QSO.  

Next Henry made contact even as the little battery struggled to make an output.

 

From then until the end of the cycle Henry was bitten by the QRP bug. I have a log of the station’s call somewhere and I have polaroid pictures of the shack from that day.

 

The top the transceiver still has the scratches from the improvised key.

 

I think everything about radio is amazing.

 

But some days when propagation is just so, the wind is blowing in the right direction, the coffee is hot or the beer is cold……

 

72 K5UOS

 


Re: Raspberry Pi

Tim N9PUZ
 

On 4/17/2013 10:39 AM, Bill Cromwell wrote:

On the Raspberry Pi web site in a FAQ it was mentioned the processor can
be overclocked from something like it's normal ~400 MHz and some of them
will run okay up to 800 MHz. So maybe you meant it is a 'sub 1GHz'
machine.
You are correct. I did in fact mean sub 1 GHz. Just like when I'm sending code, my fingers and my brain occasionally don't connect well!

73,

Tim N9PUZ


Re: 5 watts?

Chris Howard w0ep
 

I had a guy once, mid QSO, I told him I was qrp
and he came back "life is too short for QRP 73" and
started calling CQ.

Fortunately I don;t remember his call.


Re: Raspberry Pi

Bill Cromwell
 

On Wed, 2013-04-17 at 08:05 -0500, Tim McDonough N9PUZ wrote:
--snip----


The Raspberry Pi is a very cool little computer. Especially if you
always keep in mind that is a sub-1MHz processor which is probably
not
the same as what you use day to day.
----snip--

73,

Tim N9PUZ
Hi Jim,

On the Raspberry Pi web site in a FAQ it was mentioned the processor can
be overclocked from something like it's normal ~400 MHz and some of them
will run okay up to 800 MHz. So maybe you meant it is a 'sub 1GHz'
machine. My old radio Shack Color Computer was a sub 1 MHz machine at
somewhere around 750 kHz. My Apple II is way faster between 1 and 2 MHz!
I get dizzy running that one. Did I miss something when I read that
about ~400 MHz?

73,

Bill KU8H


Re: Raspberry Pi

Michael McShan <n5jky@...>
 

I just got a Pi this week; took it to work to hook up to an extra monitor and keyboard I had in the office to see if it works.  Just for the heck of it I installed several commonly used UNIX bioinformatics packages on it to see how it would handle some heavy data crunching, and the Pi passed the test quite respectably!  I know bioinformatics is of little interest here, but it shows that this is really a nice little platform for serious computing.  I hope to get it to work as a TNC/APRS unit.

I ordered a Motorola ATRIX Laptop Dock to go with my Pi.  The dock will provide a HDMI display, keyboard, trackpad and battery for the Pi in one neat unit.  There is a description here:


I'll let everyone know how it turns out.  Still waiting for it.

72/73,
Mike N5JKY
OK City


On Apr 16, 2013, at 9:44 PM, Ray Cadmus <rcadmus@...> wrote:

 

The Pi is a neat little computer - unfortunately not enough zip to handle fldigi.  There is an alternative that works.  Check out the linpsk demo on AmateurLogic.tv episode 53.  George has tried fldigi and gave up.  linpsk seems to work OK.   An older episode of AmateurLogic.tv has George making a nice case for the Pi from a common electrical box.  Then a later episode still he builds a 12v to 5v regulator to power his from the shack power supply.



Re: 5 watts

Michael McShan <n5jky@...>
 

I mainly operate CW but occasionally do a foray into SSB.  Once I had been working CW at the 500 mW level for a month or so and decided to tune 20M sideband just to see what was happening.  I heard a CQ and answered the station.  "I'm sorry, OM, you're only 5 by 5 here,"  he told me.  I looked at my rig and saw that I never changed the power level.  So I switched the FT-817 back up to 5W and answered back "how's this now?" "Oh, much better, much better, solid 5 X 9."  Then I told him that he originally copied me at 500 mW and he was amazed.

By the way, the station was NU5DE; you can look them up on QRZ.com.  I did not ask him what he was wearing.

72/73,
Mike N5JKY
OK City

On Apr 17, 2013, at 7:35 AM, sshin02143@... wrote:

 

I have had that experience too, where the other station is in a state of disbelief about my 5 watts. Often I get a power report from the other station, and I've been told of anywhere from 300 to 900 watts, and I'm doing just fine with my 5!

It all really comes down to propagation doesn't it? I've worked Australia a couple of times at 5 watts and once I was given a 599 RST, that's over 10,000 miles away, and with a simple wire antenna.

72,
Rick
WU1V



Re: 5 watts

Stephen Roberts <steverob@...>
 

Amen brother. My ham world changed a billion fold when I got my OCF up 80' in my maple trees. It will remain the best $150 I ever spent in this hobby. Before that I had a Par End Fed cut for 40M sloping up to about 30'.

73
Steve, W1SFR


On Apr 17, 2013, at 9:21 AM, Tim McDonough N9PUZ wrote:

 

On 4/17/2013 7:48 AM, Wayne Dillon wrote:
> The stations taht make me smile are the ones (and there are a few) that
> run the full legal limit into a G5RV or a short(ish) random wire, then
> wonder why a particular DX station can't copy them. Oh well...
> 72/3 es God Bless de Wayne - KC0PMH

It's an interesting study in human nature that after studying for their
license, passing the tests, and participating in this great hobby that
there are so many people will ignore the laws of physics and buy big
buck radios, amplifiers, etc. to use with tiny, ineffective antennas. I
guess it's easier to write a check than it is to think about how you can
add the best antler possible for your location.

I wonder if those people "pray" before going on the air?

“PRAY, v. To ask that the laws of the universe be annulled in behalf of
a single petitioner confessedly unworthy.”
-― Ambrose Bierce

73,

Tim N9PUZ



Re: 5 watts

Tim N9PUZ
 

On 4/17/2013 7:48 AM, Wayne Dillon wrote:
The stations taht make me smile are the ones (and there are a few) that
run the full legal limit into a G5RV or a short(ish) random wire, then
wonder why a particular DX station can't copy them. Oh well...
72/3 es God Bless de Wayne - KC0PMH
It's an interesting study in human nature that after studying for their license, passing the tests, and participating in this great hobby that there are so many people will ignore the laws of physics and buy big buck radios, amplifiers, etc. to use with tiny, ineffective antennas. I guess it's easier to write a check than it is to think about how you can add the best antler possible for your location.

I wonder if those people "pray" before going on the air?

“PRAY, v. To ask that the laws of the universe be annulled in behalf of a single petitioner confessedly unworthy.”
-― Ambrose Bierce

73,

Tim N9PUZ


Re: Raspberry Pi

Tim N9PUZ
 

On 4/16/2013 6:35 PM, Jim Sheldon wrote:
Well, I did it. Took the plunge and ordered one of those little
Raspberry Pi credit card sized Linux computer boards...
The Raspberry Pi is a very cool little computer. Especially if you always keep in mind that is a sub-1MHz processor which is probably not the same as what you use day to day.

Internet searches will yield days worth of reading on the R-Pi. Make sure to look at sites like ThinkGeek, Adafruit, etc. as they have lots of good tips from people who have gone before you. Also be sure to read all of the (free) back issues of MagPi, an online magazine devoted to the R-Pi computer. <http://www.themagpi.com/>.

Coastal Chipworks, makers of the TNC-X TNC, are now offering a TNC kit that plugs into the expansion header, not the USB port, on the Pi. <http://www.tnc-x.com/TNCPi.htm> I received one this week and plan to use it along with some available Linux software to build a small, inexpensive, diskless Winlink 2000 email gateway and replace the old desktop computer that runs the current one 24x7. Of course with a TNC attached there are all sorts of ham radio applications possible like packet clusters, APRS, etc.

73,

Tim N9PUZ


Re: 5 watts

Dale Putnam
 

I've found a good deal of change, just by having a second dipole at right angles to the first one.
Maybe that would help?... If there is room. Maybe with bent ends?

Have a great day,
 
 
--... ...-- Dale - WC7S in Wy
 
 

 

To: 4sqrp@...
From: sshin02143@...
Date: Wed, 17 Apr 2013 08:35:09 -0400
Subject: [4sqrp] Re: 5 watts

 
I have had that experience too, where the other station is in a state of disbelief about my 5 watts. Often I get a power report from the other station, and I've been told of anywhere from 300 to 900 watts, and I'm doing just fine with my 5!

It all really comes down to propagation doesn't it? I've worked Australia a couple of times at 5 watts and once I was given a 599 RST, that's over 10,000 miles away, and with a simple wire antenna.

I love DXing at QRP. Sometimes I'm hard to read, but most of the time if I can hear the other station they can hear me fine, sometimes even better than I am reading them.

Honestly, I really do wish I had a directional antenna, as I've been working the same areas in Europe and North America over and over again. I really hanker to work more of Africa and Asia as well as Hawaii. But my time will come, I'm sure. I just don't have the space for radials or a place to put up a tower. :(

72,
Rick
WU1V


Re: 5 watts

Wayne Dillon
 

The stations taht make me smile are the ones (and there are a few) that run the full legal limit into a G5RV or a short(ish) random wire, then wonder why a particular DX station can't copy them. Oh well...
72/3 es God Bless de Wayne - KC0PMH


On Wed, Apr 17, 2013 at 7:35 AM, <sshin02143@...> wrote:
 

I have had that experience too, where the other station is in a state of disbelief about my 5 watts. Often I get a power report from the other station, and I've been told of anywhere from 300 to 900 watts, and I'm doing just fine with my 5!

It all really comes down to propagation doesn't it? I've worked Australia a couple of times at 5 watts and once I was given a 599 RST, that's over 10,000 miles away, and with a simple wire antenna.

I love DXing at QRP. Sometimes I'm hard to read, but most of the time if I can hear the other station they can hear me fine, sometimes even better than I am reading them.

Honestly, I really do wish I had a directional antenna, as I've been working the same areas in Europe and North America over and over again. I really hanker to work more of Africa and Asia as well as Hawaii. But my time will come, I'm sure. I just don't have the space for radials or a place to put up a tower. :(

72,
Rick
WU1V




--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - KC0PMH

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 

4 State QRP Group NCS - 40m & 160m
4SQRP #95
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-C #11504
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155
SOC #848
30MDG#1176
NEQRP #693
GORC #192


Re: 5 watts

sshin02143@...
 

I have had that experience too, where the other station is in a state of disbelief about my 5 watts. Often I get a power report from the other station, and I've been told of anywhere from 300 to 900 watts, and I'm doing just fine with my 5!

It all really comes down to propagation doesn't it? I've worked Australia a couple of times at 5 watts and once I was given a 599 RST, that's over 10,000 miles away, and with a simple wire antenna.

I love DXing at QRP. Sometimes I'm hard to read, but most of the time if I can hear the other station they can hear me fine, sometimes even better than I am reading them.

Honestly, I really do wish I had a directional antenna, as I've been working the same areas in Europe and North America over and over again. I really hanker to work more of Africa and Asia as well as Hawaii. But my time will come, I'm sure. I just don't have the space for radials or a place to put up a tower. :(

72,
Rick
WU1V


Re: 5 watts

Wayne Dillon
 

Daniel,
Gotta love it. I've had that reaction a time or two when talking to some of the "Big Gun" west coast stations, mostly I run the "full gallon" of 5 watts but have been known to have some fun with them at a watt or so. When the sun spots are behaving ten meters is a lot of fun with just a few watts. Keep up the good work and stay safe my friend.
72/3 es God Bless de Wayne - KC0PMH


On Tue, Apr 16, 2013 at 9:10 PM, Daniel J. Mullen <hamdad2m@...> wrote:
 

4sqrp,
Tonight I was talking to a station down in Texas and sent that I was running 5 watts. His next exchange was "r r ok Dan did you say 5 watts ?".
Tell me if that wasn't fun!
73 es God Bless KD0SZS

Sent from my iPhone




--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - KC0PMH

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 

4 State QRP Group NCS - 40m & 160m
4SQRP #95
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-C #11504
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155
SOC #848
30MDG#1176
NEQRP #693
GORC #192


5 watts?

Dg Arnholt <dgarnholt@...>
 

that always makes ya feel good huh?  or less! one ham I used to talk to often was always 579  with 100 milliwatts .we were about 800 miles apart .. that was pretty cool and just a dipole at 15 feet... bill that 2 watt qrp story was funny!.. if I ever get an Argonaut or ft815 I think me thinks 15 or 10 qrp will be the attempt on ssb.. what little I use.
dennis wd9dwe


Re: Raspberry Pi

 

You're welcome, Bill, Jim, et. al.

My RPi made a nice show and tell prop at our local club meeting last
night. After 15 years of trying to generate interest in Linux among
hams, here comes this cool little computer that hams are falling all
over themselves to play with and they don't care that it doesn't run
Windows! :-D

Regardless, its price and growing list of accessories makes it an
attractive experiementer's platform as it is a fully functional general
purpose computer with a very well supported general purpose operating
system available. Quite a combination, IMO.

72, de Nate >>

--

"The optimist proclaims that we live in the best of all
possible worlds. The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us


Re: Raspberry Pi

Bill Cromwell
 

On Tue, 2013-04-16 at 21:40 -0500, Nate Bargmann wrote:

A word on the Pi's USB ports, they cannot source much power so it is
wise to connect the USB devices to it using a powered USB hub. A
keyboard and mouse is probably the limit that it can support without a
hub.

72, de Nate >>

Hi Nate,

Thanks for emphasizing that. I already noted the recommendation to use a
powered hub for that reason. The idea is set more firmly in my haid now.

73,

Bill KU8H


Re: Raspberry Pi

Jeremy Utley
 

I have a R-Pi here at home, running an APRS Digi/I-Gate.  I'm a linux guy in the day job, so I'll be happy to help you out with any questions you might have.  Just drop me a line!

Jeremy, N9PH

On 4/16/2013 6:35 PM, Jim Sheldon wrote:
 
Well, I did it.  Took the plunge and ordered one of those little Raspberry Pi credit card sized Linux computer boards.  I've wanted a good reason to learn Linux but I didn't want to set up a dual boot partition on my main Windows computer or the laptop so this little board will fill the bill nicely.  It even has HDMI video out and I ordered an HDMI to VGA adapter so I can hook it to a decent extra flat screen monitor I happen to have laying around here.  I've heard that quite a few of the ham radio apps that have been compiled for Linux will run on it, and FLDIGI for certain, so it looks to become a really nice field companion for my Elecraft KX3.  
 
If anyone on here has one of these, I'd appreciate any help available to get started with it.  I should receive it probably early next week.  These things are so popular that most places can't seem to be able to keep 'em in stock but I lucked out and found that MCM Electronics had some left.  I've dealt with them before and always had good luck with their customer service so I ordered the board from them.  The rest of the stuff I'm getting from www.adafruit.com who was out of the computers but had the accessories I wanted in stock.  I'll probably order one of the add on "real world" controller/breadboard cards to enable all sorts of neat external device control possibilities.
 
Jim - W0EB