Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives Magazine Sponsor RF Cafe Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Alliance Test Equipment Centric RF Empower RF ISOTEC Reactel RF Connector Technology San Francisco Circuits Anritsu Amplifier Solutions Anatech Electronics Axiom Test Equipment Conduct RF Copper Mountain Technologies Exodus Advanced Communications Innovative Power Products KR Filters LadyBug Technologies Rigol TotalTemp Technologies Werbel Microwave Windfreak Technologies Wireless Telecom Group Withwave RF Cafe Software Resources Vintage Magazines RF Cafe Software WhoIs entry for RF Cafe.com Thank you for visiting RF Cafe!
Amplifier Solutions Corporation (ASC) - RF Cafe

Axiom Test Equipment - RF Cafe

RF Cascade Workbook 2018 by RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low-priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Holzsworth

Tully Machine Restoration - The National Museum of Computing
Videos for Engineers

The National Museum of Computing - RF Cafe Video for EngineersIn the news recently was restoration to operational condition a Tunny code-breaking machine from the World War II era. It is part of the collection of calculating machines on display at the UK's National Museum of Computing, located in the renowned Blechley Park complex. Tunnys were used to decipher messages generated on the Lorenz SZ42 enciphering machines and sent from Hitler to his generals. Work was at a fever pitch in the days running up to the D-Day invasion. Keep in mind that the computers did not crack the code, they were for rapid deciphering of the volumes of messages sent daily. Restoration work on Tunny was performed by a team led by computer conservationists John Pether and John Whetter. "As far as I know there were no original circuit diagrams left. All we had was a few circuit elements drawn up from memory by engineers who worked on the original," per Mr. Pether. One of the original electrical designers, Sid Broadhurst, reportedly left an envelope filled with his engineering sketches sitting in the building's bathroom during the time when many of the machines were being dismantled. British Telecom (BT) engineers helps by providing expertise and a source of spare parts. I could not find a reference as to how many valves (tubes, to us Yanks), relays, switches, and feet of wire were used, but according to one source, a requirement for the project was that parts count be kept to a minimum in order to assure that it would be operational before the war was over - in favor of the Germans! Here is a really good write-up on the Colossus project that talks about Tully machines that includes detail on how the codes were cracked.

Tunny Deciphering Computer

The National Museum of Computing

Videos for Engineers - RF CafeThis archive links to the many video and audio files that have been featured on RF Cafe.

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
10 | 11 | 12 | 13 | 14 | 15 |
16 | 17 | 18 |19 | 20 | 21 | 22
23 | 24 | 25 | 26 |

Posted September 13, 2011

Holzsworth
Windfreak Technologies Frequency Synthesizers - RF Cafe

ConductRF Phased Matched RF Cables - RF Cafe

LadyBug RF Power Sensors