Category Archives: Uncategorized

Restoring a TPLINK router to Original Firmware

If you have played around with OpenWRT DDWrt or other derivatives like Funnelweb or similar downloads
see http://ofmodemsandmen.com/downloadsf.html

You might reach a point where it would be handy to restore the router to its original TPlink firmware.

In my case made a configuration which worked to relay from one router to a new subnet using WPA. Unfortunately when switched off the connection had to be redone manually on next use.

I was uncertain reading various pages in the Wiki and on Forums whether removal of the boot part of the file was necessary for this particular file and with the web interface which I had installed.

I decided to risk this a direct upgrade using the file downloaded from

http://www.tp-link.com.au/support/download/?model=TL-MR3420&version=V2

mr3420v2_en_3_15_9_up_boot(140912).bin

However this produced an error that the file was not the correct type.

Further research brought me to this page

http://www.friedzombie.com/tplink-stripped-firmware/

Downloading the stripped file from here worked straight away.
So you do need a stripped file and you can use the web interface
instead of putty and WinSCP if its available.

Thanks to friedzombie for providing this resource.

 

IMG_1455

Arduino Radio Projects

Terry Bailey G6CRF gave an interesting talk at the Warrington Amateur Radio Club which highlighted some excellent based Arduino projects for the radio amateur. Some of these are listed below

Antenna Analyser
http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=29105

Simplex HAM Repeater Controller http://www.qsl.net/on7eq/projects/arduino_simplex_repeater.htm

Morse Code Keyer
http://www.instructables.com/id/Morse-Code-Keyer-for-Arduino-and-Amateur-Radio/

Software Defined Receiver
http://m0xpd.blogspot.co.uk/2014/03/arduino-sdr-ii.html

Rotator Computer Interface
http://blog.radioartisan.com/yaesu-rotator-computer-serial-interface/

An automatic antenna tuner.
http://blog.radioartisan.com/arduino-antenna-tuner/

For more amateur radio projects the ARRL book “Ham Radio For Arduino and Picaxe” is a useful Guide. http://www.hamradioprojects.com/

 

 

The DVRTR 3

Advances in Digital Radio

 

Digital Radio systems continue to advance at a rapid rate.

Icoms Dstar based on the JARL standard developed from work by Satoshi Yasuda 7M3TJZ has been operational since 2004 and has gradually been taken up maimly as a mobile mode for repeater use. It is in fact the use of network linking between different repeaters r repeater groups where many of the advantages lie.

There have been other implementations of Dstar such as Dongles and hotspots and the implementations of D star using the raspberry pi have proved fairly popular.

A number of Dstar implementations such as Dutchstar, DVRPTR1 and DVRPTR also have their followings for those which like to take a look under the hood or are looking for an alternative to Icom gear.

Now though with the introduction of Mototrbo into the amateur market there are signs that interest is beginning to heat up.

Connect systems have now announced the introduction of a combined D-Star and Mototrbo compatible radio which will be introduced later this year and will be called the CS 7000.

For more details here is a Youtube video from Ham Radio Now which tells of developments in various forms of digital voice.
You can also follow progress at the rapidly expanding Yahoo group CS7000.

Chester Folk Festival

 

Chester Folk Festival

Friday 23rd – Monday 26th May (Spring Bank Holiday Weekend)
IN THE VILLAGE OF KELSALL, nr. CHESTER

Fay Hield & the Hurricane Party • Jim Moray
Jez Lowe & the Big Bad Pennies • Lucy Ward • Allan Taylor
Chris Sherburn & Findlay Napier • Vicki Swan & Jonny Dyer
Steve Turner • Blackbeard’s Tea Party • Sara Grey
Belshazzar’s Feast • Full House • Wildfire Folk • Fiddlestone
Goat Roper Rodeo Band • Dave Gibb & Elly Lucas
Across the Water  • The Time Bandits • The Deacons
The Waite Collective • Roy Clinging • Rose Price
Deportees • An Croenen • John Finnan
Graham Bellinger • Charlotte Peters Rock • Tom Hughes

Dances:

Blackbeard’s Tea Party • Cupola • Albireo • The Time Bandits
The Black Cat Band • Lisa Heywood • Dave Jolly • Ian Carter • Mo Waddington

Displays:

Chester City Morris Men • Wharfedale Wayzgoose
Earl of Stamford Morris • Bradshaw Mummers
Family Events & Children’s Entertainment with Panic Circus

STILL no charge for camping! (weekend ticket holders only)
Space on main site limited – EARLY BOOKING ESSENTIAL

For more information about this year’s guests, plus Outline Provisional Programme,
Ticket Prices, Booking Form, Route Map etc. or to Buy Tickets Online,

visit our website at www.chesterfolk.org.uk -

SANYO DIGITAL CAMERA

Lymm Village Festival

 

LYMM VILLAGE FESTIVAL 2014 – FOLK CLUB EVENTS

Festival Opening Night: Thursday 19th June at the Spread Eagle
~ THE HOUGHTON WEAVERS ~

Saturday 21st June at the Spread Eagle – Double Bill with LIZ SIMCOCK

Sunday 22nd June at the Spread Eagle – RON TRUEMAN-BORDER

Wednesday 25th June at the Rugby Club…
THE SPINNERS LEGEND! Yes, Hughie Jones, Mick Groves and ‘Count’ John McCormick are coming to Lymm!

Thursday 26th June at the Spread Eagle – THE TIME BANDITS!

Txfactor Regular Internet TV Features For Amateur Radio

 

A new Internet TV program has been launched this month (Feb 2014). It provides insight and News from the world of Amateur Radio.

The series of programs will be accessible from

http://www.txfilms.co.uk/txfactor/ or on youtube

The company TX Films has been set up to produce lively and informative content for specialist interests including leisure, science and technology.

The program is produced by radio amateurs for radio amateurs.

In the first episode the presenter visits the Marconi Centre which is also home to Poldhu Amateur Radio Club. Here we learn about Marconi’s transatlantic experiments using spark transmitters and coherers.

Also find out about the challenges of working summits on the air and how a 2 metre repeater is run at the Norman Lokyer observatory and radio station GB2NLO.

 

 

 

 

 

Cube Sat

Listening to Funcube 1

Initial Attempts with Funcube 1

I have been interested in Satellites for a while and have heard some transmissions from the ISS in the past.

I decided I would investigate the New Funcube 1 (AO-73)
which has 5 or 6 passes a day which can be heard in the UK.

See link for predictions

http://www.n2yo.com/passes/?s=39417

The satellite downlink is on 145.960 during evening passes
BSPK Telemetry is on 145.935

I have monitored tranmissions with a vertical colinea at about 12 meters above ground. To get more signal from near overhead passes I have installed a loop antenna about 1 meter above ground level.
This is simply a loop of coax almost two meters long supported by
canes stuck into the lawn, a very temporary affair, its fed via 40 cms. (1/4 wave) of 75 ohm satellite impedance to transform the loop impedance of around 100 ohms to 50 ohms.
The loop is horizontal and will give better results for horizontally polarised signals than the vertical.
I am not sure what polarity we should expect from the Funcube but suffice to say it is likely to vary.

On test the horizontal loop supplied some interesting results.
Indeed it was possible to hear several stations calling CQ on the evening passes on both antennas with the loop sometimes providing the stronger signal. Often the S meter on the IC910 did not register but calls could be clearly heard including Germany Spain and the UK.

Various other signals could also be heard on the horizontal loop which were poor or non existant on the vertical they do not drift in frequency and can be received for long periods of time so not from satellites.
I don’t know the source of these signals or even if they are images from out of band signals. There is one at 145.942 USB
S5 on the metre sounds like a burst of very fast CW every second.
At times this is a continuous carrier.

I have installed .net V4 and the Funcube Dashboard software

see

http://funcubetest2.files.wordpress.com/2013/11/funcube-dashboard-install-ops-guidance-notes-release-1-2.pdf

The software is working and can read the downloaded test file,
however as yet I have been unable to match the output from the IC910 8 pin Aux socket to the souncard.

As far as the transponder goes I may need to make another antenna for the 70 cms. uplink.
The frequency for this is 435.140 and the transponder is set up as inverting. This means that the uplink will need to be transmitted on LSB for USB downlink and tuning up on the receive side corresponds to tuning down on transmit.

Raspberry Pi

Xastir On The Raspberry Pi

 

Installing Xastir

Xastir allows you to sent upa location server for your internet connected Pi to show the location of your station on aprs.fi via the APRS network.

Method

1. Get image file
eg
2014-mm-dd-wheezy-raspbian.zip and unzip to get
2014-mm-dd-wheezy-raspbian.img

2. Download and unzip
win32diskimager-binary.zip
3. From the downloaded files in 2 run Win32DiskImager.exe Select the correct image file and destination which will be the raspberry pi’s SD card

4. If a config file is available to work with the screen in use with the correct resolution copy this onto the card.

5. Insert the card and connect monitor, keyboard and mouse.
Insert the power connector.

The raspberry-pi should now boot into the configuration utilty.
raspi-config see http://elinux.org/RPi_raspi-config for details

In the UK the correct Locale is default so you only need to

EXPAND-ROOTFS – Expand Root Partition to Fill SD Card  if the image is smaller than the card you are using. Over time you can then add more data and applcations to make more use of the card.

6. login as pi user to shutdown the system after exiting raspi-config

Plug in the network cable and restart this time an address should be assigned, I checked this in the routers client list.

7. Since this is a new build it requires updating.
sudo apt-get update

Followed by:
sudo apt-get upgrade if you want to look for newer packages

Now’s also a good time to make sure the who Linux distribution is up-to-date. You can do this now, or later (it may take a while). Again make sure you have an internet connection and run:

sudo apt-get dist-upgrade.

I omitted this to save time as the download is recent. When running apt-get you may be prompted with a continue Y/N.  Just type Y and return.

8. sudo apt-get install gdebi
This installer is useful for installing packages from the gui

if required later.
9. sudo apt-get install Xastir this installs Xastir

10 startx start the gui and then locate Xstir and run it.

11 Follow the configuration details as in

http://www.xastir.org/wiki/Configuring_Xastir

 

Licence Revalidation.

Since 2007 it has been necessary for radio amateurs to validate there licence every 5 years.

The validation is a low cost method of keeping track of the location and calls of amateurs.

Page 6 of the licence document states that “By no later than 5 years after the date of issue of this licence, unless during that 5 year period the licensee has given notice to Ofcom of any change to any of the licensees details as set out in section 1 of the licence in accordance with clause 6 2), the licensee must confirm to Ofcom that the details set out in section 1 of the licence remain current and accurate.

The licensee must make further confirmation to Ofcom every 5 years from the later of : (a) the date on which the licensee last confirms to Ofcom that the details set out in section 1 of this licence remain current and accurate  and (b) the date on which the licensee last gives notice to Offcomm of any change to the licensees details. Failure to do so may lead to revocation of the licence.”

The licence may be validated with no charge at www.ofcom.org.uk Amateurs who experience difficulties with this should contact 020 7981 3131 It is necessary to login using the email originally supplied plus your password.

In the license details providing your address and other details are still current click on revalidate in the red section of the panel.

licence validation2