pipes callcq map

http://pipes.yahoo.com/pipes/pipe.run?_id=8f305e9fb12845891d03f3cf366454e2
some reason it gives me an odd loaction?

spot of DIY

one of those things we all need now and again.
http://vk5ajl.com/projects/SWRMeter.php
knowing the principals full well from my days in a radio job, so I had a go.
work you know but with one error swap names of FWR and REV meeasure port.
to this:

With matched terminations on the output ports,

1. A portion of the wave traveling from port 1 (input) to port 4 (output) is

coupled to port 3 (forward coupled), but not to port 2.

2. A portion of the reflected wave traveling from port 4 to port 1 is coupled

to port 2, but not port 3.

3. A portion of the wave incident on port 2 to port 3 is coupled to port 4, but

not port 1; and a portion of the wave incident on port 3 is coupled to port 1, but not

port 4.

 

thought I had a total miss-match with 50R load but did a few tests and googleing and got it right.

The reflected voltage is r times the incident voltage.  Since power is proportional to the square of the voltage, the reflected power, Prefl is (5/7)2 x 4 W = 2.04 W

and the power to the antenna = 4 W  - Prefl = 1.96 W

when I work out how to add gerber plot files I will

and a picture of my work.

how to get your own QrCode badge.
use http://imagecharteditor.appspot.com/ and copy paste away
and

Bob's your aunties cat??
works with Zebra apps J2ME
see more at https://developers.google.com/chart/image/docs/making_charts
graphs charts so on.

twitter call cq

a bit of code I've run up baseed on twitter search api. If you put #callcq tag in your post it will show up here by javascript magic. working on a map if you add geo coding data postcode, gps, QTH etc....
got the idea from http://www.twitwx.co.uk/.

I've stuck my first example on extra page on this site. but this is the main working. it wont run in a post.

<div id="results">
</div>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
var url='http://search.twitter.com/search.json?callback=?&q=';
var query='%23callcq';;
  $.getJSON(url+query,function(json){
   $.each(json.results,function(i,tweet){
      $("#results").append('<p><img src="'+tweet.profile_image_url+'" widt="48" height="48" />'+tweet.text+'</p>');
   });
  });

});
</script>

it's the spots

acrding to this http://hamwaves.com/propagation/
more spots higher the band you can use?

forcasting http://hamwaves.com/propagation/forecast.html

stil no muf(Mhz) = SUNspot*K

Gadget wigets continued

Why are not all Gadget widgets the same of HF predictions?

and

http://rigreference.com/solar

don't always show same traffic lights colors.
badge one has an explanation at http://www.hamqsl.com/solar2.html
that I'm trying to understand. but does not have any explanation I can find.
I'm going to compare them to what I hear on my trusty Sony portable and let you know which is more accurate.

CQ MAP?

Any one know how I could write a Gadgets, widgets or javascript to search twitter for #callingCQ and show anyones tweets with this tag. eventualy it could go on a map like http://uksnowmap.com/ or http://www.twitwx.co.uk/ had a look at their code but not sure about it can't get to bottom of it.

I suppose I could e-mail them?

HF-DATA BADGES

I'm collecting together a pile of radio data widgets/gadgets on my site. http://sites.google.com/site/gw6pfk/HF-data

see example, I'm also working on gadget wrapper for some of the more awkward ones to go on google sits.
I you see any I may be interested in drop me a line.

The UV-3R is a very interesting beasty.

The UV-3R is a very interesting beasty. Can cover 136-174Mhz and 400-470Mhz, up to 99 set channels and a vast array of tone and repeater option. weighing in at 130g and fitting in the smallest pocket, cool ha!

See I like it and take it everywhere with me but why is the user interface designed by a mad man? Here are a few examples:

1/ You have to press a very sticky button to adjust volume or switch it off with a loud beep if you need it quiet.

2/ Setting up a memory channel is so difficult that you could not work it out without the manual which is a little obscure itself.  There is a yahoo group that is and exalt help.

3/ Once you have your 99 memories set you have to remember what they are. 2M I know well so not to bad but 70cm has got me confused on a number of occasions. Not really the rigs fault all together the band plan is a bit odd any way. A name label would be good.

4/ Scanning needs two key presses and it’s all memories or the whole band UHF/VHF.

5/ Antenna you need to swap it for each band and a nice screw fitting.

The last is more of a hardware problem along with the head phone connector that sends it into transmit if you put normal headphones in. it also locks it transmit if you use the one supplied, see ferrite mod on my picture.

With this taken it’s pretty good for its price range does two bands and gives good reports on the air.

Anyone think they’ll do D-star or a 6M rig??

something you should read if you're into Antennas

http://www.strobbe.eu/on7yd/136ant/
it's about LF but very enlightening about all antenna design.
such as  loading coils and their calculation
A good read in my book