Uploaded April 2012 | Updated September 2026, 1 day ago
Bletchley Park is an estate located in the town of Bletchley, in Buckinghamshire, England, which currently houses the National Codes Centre and the National Museum of Computing.
During World War II, Bletchley Park was the site of the United Kingdom's main decryption establishment, the Government Code and Cypher School (GC&CS), where ciphers and codes of several Axis countries were decrypted, most importantly the ciphers generated by the German Enigma and Lorenz machines.
Bletchley Park tour [ docu in full ]
Your presenter Linden Stead
1. The early days
2. Station X - The First breakthrough
3. Enigma revisited
4. The Bombe machine
5. The Lorenz and Baudot code
6. Breaking Lorenz - The Germans mistake
7. Tunny and Robinson
8. Colossus
9. The final chapter
Link : bletchleypark.org.uk
Link : Linden Stead - twitter.com/#!/stratman1
Link : en.wikipedia.org/wiki/Bletchley_Park
Bletchley Park is an estate located in the town of Bletchley, in Buckinghamshire, England, which currently houses the National Codes Centre and the National Museum of Computing.
During World War II, Bletchley Park was the site of the United Kingdom's main decryption establishment, the Government Code and Cypher School (GC&CS), where ciphers and codes of several Axis countries were decrypted, most importantly the ciphers generated by the German Enigma and Lorenz machines.
Bletchley Park tour [ docu in full ]
Your presenter Linden Stead
1. The early days
2. Station X - The First breakthrough
3. Enigma revisited
4. The Bombe machine
5. The Lorenz and Baudot code
6. Breaking Lorenz - The Germans mistake
7. Tunny and Robinson
8. Colossus
9. The final chapter
Link : bletchleypark.org.uk
Link : Linden Stead - twitter.com/#!/stratman1
Link : en.wikipedia.org/wiki/Bletchley_Park


![7MHz cw - am transmitter
I made a simple cw/am transmitter for 7 MHz [hamradio]
The design is from Nitin VU3GAO.
Just one tube [EL84] and you are on the air.
As a modulator for AM I used a TDA2005, just one section because its a stereo amp.
To finish it off a boxed it in a cabinet I had on the shelf.
Hamradio is always fun :-)
Link : http://animals.home.xs4all.nl/files/7MHz_Tube_El84.png [my design for 7 MHz]
Link : http://nmwilliam.tripod.com/el84.html [original design - website VU3GAO]
Link : http://animals.home.xs4all.nl/files/TDA2005_AM_Modulator.jpg [Modulator] 7MHz cw - am transmitter](https://i.ytimg.com/vi/PzNo0gQR44k/mqdefault.jpg)
![IW3FZQ 10 meter beacon received in Amsterdam
More info on the beacon [ click show more ]
QRG : 28.226.80 MHz
Mode : CW
Date : 27 june 2026
GMT : 17:18
QTH : Near Monselice (Padova) Italy
QRA : JN55VF
Power : 5 Watt
Antenna: GP
Receiver : FT897
Antenna : Endfed
My QTH : Amsterdam
QRA : JO22KI
RST : 569
Distance : 592.2 mi ( 953.1 km) Monselice to Amsterdam
Text send : IW3FZQ / B JN55VF IW3FZQ 10 meter beacon received in Amsterdam](https://i.ytimg.com/vi/QCRfEotXfjs/mqdefault.jpg)

![Grateful Dead in Space - NASA STS-119 wake up call
This recording [Box of rain] I made during a live broadcast. Two things I like come together : Space and the Dead :-)
Day 6 [03202009] STS-119 wake up call - Deployment of the S6 solar array on the ISS
Box of rain - Grateful Dead
Music played for mission specialist John Phillips
Discoverys crew attached the segment to the end of the S5 truss, completing the starboard side of the stations structure. The segment includes the fourth and final set of solar arrays and batteries for generation, storage, regulation and distribution of electrical power for the station.
Link : http://www.dead.net/ [Website]
Link : http://community.deadvids.com/ [Streaming audio / video]
Link : http://www.gdradio.net/gd.asx [Streaming audio]
Link : http://en.wikipedia.org/wiki/Box_of_Rain
Link : http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts119/main/index.html
Link : http://www.nasa.gov/images/content/293532main_119patch_226.jpg [Crew patch] Grateful Dead in Space - NASA STS-119 wake up call](https://i.ytimg.com/vi/RZWxIRso33w/mqdefault.jpg)


![My Rockmite 2.0
Today I repaired my Rockmite QRP tranceiver. There was a resistor in the 12 Volt-line of the amplifier burned. It works again :-)
I added a SWR-meter and an antennatuner for when im using an wire-antenna.
So now I have a working Rockmite 2.0
Sorry for the shaky video ... I have only 2 hands ...
Link : http://www.smallwonderlabs.com/ [Get your Rockmite here]
Link : http://www.qsl.net/n0rc/rm/ [The Rockmite-files]
Link : http://groups.yahoo.com/group/Rock-Mite_Group/ [The Yahoo Rockmite-group] My Rockmite 2.0](https://i.ytimg.com/vi/S-UM9xJMTqY/mqdefault.jpg)

![F5ZUU 10 meter beacon received in Amsterdam
F5ZUU 10 meter beacon received in Amsterdam
More info on the beacon [ click show more ]
QRG : 28.2415 MHz
Mode : CW
Date : 2nd of june 2024
GMT : 10:54
QTH : Malataverne
QRA : JN24IL
Power : 5 Watt
Antenna: Vertical
Receiver : FT897
Antenna : Endfed homemade
My QTH : Amsterdam
QRA : JO22KI
RST : 559 + QSB
Text send : F5ZUU JN24IL ant vert 5 W qsl web F5ZUU
QSL via F5IOG F5ZUU 10 meter beacon received in Amsterdam](https://i.ytimg.com/vi/SwlLWc7dFKY/mqdefault.jpg)