Industrial - technical

A preserved steam roller on a plinth at Karystos, Greece. (DSCN0523) This work is licensed under a Creative Commons Attribution 4.0 International License .

Processed with GIMP 2.10.18 A preserved steam roller on a plinth at Karystos, Greece. (DSCN0522) This work is licensed under a Creative Commons Attribution 4.0 International License .

A mobile low-pressure steamboiler on wheels, used in the past for passenger wagon preheating, on display outside Thessaloniki Passenger Railway Station. (DSCN0430) This work is licensed under a Creative Commons Attribution 4.0 International License .

Unimog U1400 "95026" of Hellenic AF 331 Squadron at Tanagra Air Base LGTG (DSC 0015). This work is licensed under a Creative Commons Attribution 4.0 International License .

A Unimog 1450 tows a boat into the sea near Anavyssos, Greece. (IMG_0256) This work is licensed under a Creative Commons Attribution 4.0 International License .

A large industrial X-ray tube, on display at the Welding and NDT Institute . (IMG_0104) This work is licensed under a Creative Commons Attribution 4.0 International License .

A radio-controlled hail cannon installed near Eleftheres village in Eastern Macedonia, Greece. (IMG_0080) This work is licensed under a Creative Commons Attribution 4.0 International License .

Specialized raised platform truck of OSY , used for the maintenance and repail of overhead trolley-bus electrical conductors. (20210911_184004) This work is licensed under a Creative Commons Attribution 4.0 International License .

The original USB — Unified S-Band, a common communication channel used during the Apollo missions. With just 20 Watts, they could communicate with Houston from the moon. And a single antenna combined voice, television, command, tracking and ranging. From the Future Ventures’ Space Collection. This fully redundant Command Module S-Band Amplifier output was routed to the High Gain and Omni-Directional antenna's on the CSM. It is stamped Serial No. 0006 Even today, this type of specialty vacuum tube is among the most efficient and compact types of RF amplifier. As a result, many high-tech satellites still feature these devices. This photo and detailed analysis come from the Ken Shirriff blog, which became popular with places like Hackaday: “How did the Apollo astronauts communicate 240,000 miles back to Earth? With an amplifier that was just 20 watts, built from special traveling-wave tubes. I look inside this amplifier in my latest blog post” Flickr file: www.flickr.com/photos/jurvetson/51319874206/in/feed-22706-1626635793-1-72157719556711443 This work is licensed under a Creative Commons Attribution 4.0 International License .

From the Future Ventures’ Space Collection. Photos by technoarchaeologist Curious Marc, who is getting my heroic Apollo artifacts working again! Stay tuned, so to speak. This unit takes the phase-modulated signal and FM TV signal, combines them, modulates them, and amplifies them before sending them to the main amplifier. It also has the receiver circuitry. It also has interesting ranging circuitry: NASA sent a pseudo-random ranging sequence to the spacecraft and this box amplified and returned the signal. On the ground, they measured how long the signal took (by correlating the returned signal with the sent signal), which gave them an accurate distance to the spacecraft. Since this box includes amplification, it can be used without the main amplifier, and they could do that on Apollo if the main amplifier failed. From Spaceaholic: "Apollo Command Module Unified S-Band Transponder (manufactured by Motorola, Inc., Military Electronics Division, Scottsdale, Ariz.). The Unified S-Band Transponder was the only method of exchanging voice communications, tracking, biomedical, and ranging, transmission of pulse code modulated (PCM) data and television, and reception of uplinked data from Mission Control once the Apollo Command Module was outside a range of 1500 nautical miles and line of sight from Manned Space Flight Network (MSFN) ground stations strung around the Earth (within that range, VHF was available). The term "Unified" is applicable because the communications system combined the functions of (signal) acquisition, telemetry, command, voice, television and tracking on one radio link. This design resulted in fewer antennas/electronics assemblies (and thus decreased complexity and weight) on both the spacecraft and the ground station segments of the MSFN. The Unified S-Band Equipment (USBE) onboard the Apollo Command Module, Lunar Module, Lunar Rover were absolutely critical to the successful execution of the Apollo program; and reliability was assured through the implementation of full redundant, heavily tested design. The Electronic assembly hosts a redundant architecture consisting of two phase-locked transponders and one frequency modulated transmitter housed in single, gasket-sealed, machined aluminum case, 9.5 by 6 by 21 inches. The unit weighs 32 pounds, operated from 400 Hertz power, with RF output of 300 milliwatts, with a fixed transmit frequency of 2287.5 Megahertz (MHZ) / receive frequency 2106.4 MHZ. The S-band transponder is a double-superheterodyne phase-lock loop receiver that accepted a phase-modulated radio frequency signal containing the updata and up-voice subcarriers, and a pseudo-random noise code when ranging was desired. This signal is supplied to the receiver via the triplexer integral to the S-band power amplifier equipment and presented to three separate detectors: the narrow- band loop phase detector, the narrow-band coherent amplitude detector, and the wide-band phase detector. In the wide-band phase detector, the intermediate frequency is detected, and the 70-kiloHertz up-data and kilohertz up-voice subcarriers are extracted, amplified, and routed to the up-data and up-voice discriminators in the premodulation processor. When operating in a ranging mode, the pseudo-random noise ranging signal is detected, filtered, and routed to the S-band transmitter as a signal input to the phase modulator. In the loop- phase detector, the intermediate frequency signal is filtered and detected by comparing it with the loop reference frequency. The resulting dc output is used to control the frequency of the voltage-controlled oscillator. The output of the voltage controlled oscillator is used as the reference frequency for receiver circuits as well as for the transmitter. The coherent amplitude detector provided the automatic gain control for receiver sensitivity control. In addition, it detected the amplitude modulation of the carrier introduced by the high-gain antenna system. This detected output was returned to the antenna control system to point the high- gain antenna to the ground station. When the antenna pointed at the ground station, the amplitude modulation was minimized. An additional function of the detector was to select the auxiliary oscillator to provide a stable carrier for the transmitter, whenever the receiver lost lock. The S-band transponders could transmit a phase- modulated signal with the initial transmitter frequency obtained from one of two sources: the voltage controlled oscillator in the phase-locked disband receiver or the auxiliary oscillator in the transmitter. Selection of the excitation was controlled by a coherent amplitude detector. The S-band equipment also contains a separate FM transmitter which permitted scientific, television, or playback data to be sent simultaneously to the ground while voice, real-time data, and ranging were being sent via the transponder." Flickr file: www.flickr.com/photos/jurvetson/51319733651/in/feed-22706-1626631616-1-72157719561989546 This work is licensed under a Creative Commons Attribution 4.0 International License .

From Curious Marc. I bet the original Soviet designers of this device never imagined it could be revived as a cuckoo clock with sounds from Soviet space transmissions. From the FV artifact tour, Part I. Flickr file: https://www.flickr.com/photos/jurvetson/51319535682/ This work is licensed under a Creative Commons Attribution 4.0 International License .

Internal (recessed) pressure relief valve of an ADR Class 2 (LPG) tank. (20210506_105533)

A vintage Broadcom BCM95821 Crypto Accelerator PC card, featuring a BCM58201A2KTB secure microcontroller. This PCI card supports encryption with 3DES-CBC and DES-CBC, secure hashing using MD5 and SHA-1 algorithms and RSA asymetric key operations. (DSC_0778.JPG) This work is licensed under a Creative Commons Attribution 4.0 International License .

Model of an old industrial installation for the production of coal gas. (DSC_0527) This work is licensed under a Creative Commons Attribution 4.0 International License .

An ICOR Technology Caliber remote control vehicle (bomb disposal robot) of the Hellenic Police on display at Zappeion Exhibition Center. (DSC_0471) This work is licensed under a Creative Commons Attribution 4.0 International License .

Poster: "A Rough Guide to Spotting Bad Science". created by Compound Interest (2015)

Inside of an INALAN optical fibre splicebox in downtown Athens, Greece. (DSCN1316) This work is licensed under a Creative Commons Attribution 4.0 International License .

Optical fibre splicebox for a high speed (100 Mbps) INALAN internet connection in downtown Athens, Greece. (DSCN1284) This work is licensed under a Creative Commons Attribution 4.0 International License .