ARLA/CLUSTER: Centenário do nascimento de Alan Turing

[João Costa > CT1FBF]

Centenary of Alan Turing's birth

The Milton Keynes Amateur Radio Society (MKARS) will celebrate 100
Years since Alan Turing's birth with
a series of special events using the specially issued Notice Of
Variation (NOV) callsign GB2AMT (Alan Mathison Turing).

On 16th and 17th June, we at MKARS will be receiving multiple Enigma
transmissions using CW (Morse code) from GCHQ's tent at the Cheltenham
Science Festival.

A special NOV has been issued by Ofcom for this occasion, allowing the
encrypted transmission to take place. GCHQ will be transmitting using
the call sign GB5AMT and we will be receiving this particular
transmission using the GB2BP call sign.

What's unique with this NOV is that GB5AMT can only transmit directly to
GB2BP and cannot receive any transmissions. However, we will confirm
receipt of transmission to GB5CSF, which is the call sign of the
Cheltenham Science Festival.

As far we are aware, this is the first time Ofcom has granted permission
for an encrypted transmission on the amateur radio bands.

We will be using at least 2-3 receiving stations, in order to more closely
imitate reception conditions as they were during the war.
The messages received by each station will then be compared/collated
at a central point and then fed into the Bombe machine in Block B at
Bletchley Park.
This part of the event will be transmitted by video link to
Cheltenham, and the decoded message will then be sent back to
Cheltenham using Twitter.

On 23 and 24 June, we will be operating using the GB2AMT call sign.

We will also be operating on 30th June and 1st July,  however this time
using our standard GB2BP call sign.

On both occasions we hope to operate the station from the green
outside the Mansion at Bletchley Park, however this is weather
dependant and might change!



Mike

http://www.mkars.org.uk/news/ article/23/centenary_of_alan_ turing_s_birth