ARLA/CLUSTER: Horarios e Frequencias para o desafio " Colossal " para 15 e 16 de Novembro de 2007.

[João Gonçalves Costa]

Caros Colegas,

O desafio proposto é conseguir decifrar primeiro, recorrendo aos PC domésticos actuais, n vezes mais potentes que o velhinho Colossus Mk2 reconstruido, algumas mensagens transmitidas via rádio por maquinas alemães da II Guerra Mundial nos dias 15 e 16 de Novembro de 2007.

Planned Transmission Timetable

We will be using the Amateur 20 Metre, 40 Metre and 80 Metre bands for the transmissions.

The 20 Metre band lies between 14.000 MHz and 14.350 MHz
The 40 Metre band lies between 7.000 MHz and 7.200 MHz
The 80 Metre band lies between 3.500 MHz and 3.800 MHz

Each of these bands is split into sections with preferred operating modes. It is impractical to define exactly what frequency within each band will be used during the Cipher Challenge - the spot frequencies in the table below have proven workable during early testing.

Date Time Frequency Band Mode  Plain/Cipher

15 Nov 2007 15:00  7.038 MHz 40m J2B Challenge 1
15 Nov 2007 16:00  3.590 Mhz 80m J2B Challenge 2
15 Nov 2007 17:00  3.590 Mhz 80m J2B Challenge 3
15 Nov 2007 18:00  3.590 Mhz 80m J2B Challenge 1
16 Nov 2007 09:00  7.038 MHz 40m J2B Challenge 2
16 Nov 2007 10:00  14.090 MHz 20m J2B Challenge 3
16 Nov 2007 11:00  14.090 Mhz 20m J2B Challenge 1
16 Nov 2007 12:00  14.090 Mhz 20m J2B  Challenge 2
16 Nov 2007 13:00  7.038 MHz 40m J2B Challenge 3
16 Nov 2007 14:00  7.038 MHz 40m J2B Challenge 1
16 Nov 2007 15:00  7.038 MHz 40m J2B Challenge 2
16 Nov 2007 16:00  3.590 Mhz 80m J2B Challenge 3
16 Nov 2007 17:00  3.590 Mhz 80m J2B Challenge 1
16 Nov 2007 18:00  3.590 Mhz 80m J2B Challenge 2

All times UTC

O famoso computador Colossus Mk2, de 1944, com 1.500 válvulas e considerado o "Pai" de todos os computadores actuais, foi reconstruído desde o "zero", pela equipa de Tony Sale no Reino Unido, tendo demorado 13 anos, entre 1993 e 2006 para acabar.

Mais info em: http://radio-amador.net/pipermail/cluster/2007-October/004618.html

João Costa
CT1FBF