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Technology Tag BU208

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Tuesday, 10 June 2014
Gauteng, South Africa
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In Sentier de promenade Spirou 6

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Current Goal

To pay tribute to the inventor of the TV set, this technology tag, BU208, would like to travel to Nipkow's bithplace, Lębork in Poland. The nearest cache to Lębork is GC4W9T0 Lębork - Okolice 1 - samotne drzewo. Please help to move this TB to that cache and please post some photos of Lębork in the gallery. Any photos of the travels to get there are also welcome.

About This Item


About the BU208:

The item attached to this technology tag is a BU208, high voltage power transistor, manufactured by the multiepitaxial mesa process, designed for fast switching horizontal deflection circuits in color televisions in the 1970's.

With his 1884 patent of the Nipkow disc, German technician Paul Nipkow is regarded as the inventor of the TV set. Nipkow was a German born on 22 August 1860 in Lauenburg (Lębork) in Pomerania, now in Poland

This TB would like to travel to the birthplace of Paul Gottlieb Nipkow, inventor of the TV Set.


Paul Gottlieb Nipkow Biography (1860-1940):


Nipkow, now considered the forefather of the television age, received littlerecognition for his   contribution during his lifetime. Italian physicist Guglielmo Marconi demonstrated a device that could transmit an audio signal in thelate 1890s. Nipkow was born on August 22, 1860, in Lauenburg, now Lębork in Poland. Inspired by the work of Marconi, Nipkow began thinking about the challenge of transmitting a visual image while still a student in Germany. It was well known that any successful transmission device required three essential components: adevice to translate the visual image into an electronic impulse, a second device to reassemble that impulse into an image, and a third device by which totransmit the impulse from the first device to the second. In 1884, even before completing his degree, Nipkow had developed and patented a transmissions system that achieved all three requirements.

Nipkow's television was based upon an ingenious device called a Nipkow disk, which was a metal or cardboard disk that was perforated with twenty square holes arranged in a spiral so that each hole was a little closer to thecenter than the last. As Nipkow spun the disk, he shined a strong light through the holes and onto the subject. Because each hole was slightly offset, theimage was scanned in a series of twenty horizontal lines.

In order to translate these lines into an electrical signal, Nipkow employeda selenium photoelectric cell (a device with which he had previously worked with extensively). The cell recorded the light and dark areas within each of the twenty scanned lines, converting these into a transmittable signal. In order to view the signal, Nipkow essentially reversed the process. He used a light source that flashed brightly or dimly according to the incoming signal. Tothis he added a second scanning disk, placed in front of the flashing lightand synchronized with the first disk, so that the light shone through the holes and projected twenty scanned lines onto a screen.

The main drawback to Nipkow's invention was not its design but its timing: the concept of television was so advanced that no producer or investor could envision a practical use for it. Though Nipkow used his device to transmit a visual image via telegraph wire from London to Paris, his mechanical televisionnever quite caught on. Nipkow himself eventually abandoned electronics and spent the rest of his life as a railway engineer. He died in Berlin, Germany,on August 24, 1940.

It was not until 1929 that another scientist, the Scottish engineer John Logie Baird, made certain improvements upon the Nipkow design and reintroduced itto the world. While Baird's design was still essentially mechanical, it cameat a time when the world was ready to embrace the concept of television. Photomechanical televisions were soon replaced by completely electronic devices,but even today's models rely upon the horizontal-scanning method first conceived of by Nipkow.

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Gallery Images related to BU208

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Tracking History (48188.6mi) View Map

Write note 08/22/2021 thiran posted a note for it   Visit Log

TB non présent dans la cache

Write note 02/26/2021 dlx12 posted a note for it   Visit Log

Objet récupéré, merci pour l'échange, il va continuer son chemin, je donnerai suite.. c est le premier du genre pour nous. Le temps de se renseigner et il poursuivra sa route... Maëna, Emy Dlx12

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Dropped Off 02/22/2021 LstephyL placed it in Sentier de promenade Spirou 6 Namur, Belgium - 94.06 miles  Visit Log

Bon voyage

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Discovered It 08/17/2020 MisterT. discovered it   Visit Log

Discovered it. Thank you for sharing.

Discovered It 08/17/2020 Lucky'7 discovered it   Visit Log

Discovered it. Thank you for sharing.

Retrieve It from a Cache 08/15/2020 LstephyL retrieved it from Welcome at the Bug House- TB HOTEL Namur, Belgium   Visit Log

En Balade avec Luis 💪

Discovered It 08/08/2020 dagarjaira discovered it Namur, Belgium   Visit Log

Vu sur une photo d'une cache d'un potentiel futur parcours. Merci pour le partage

Discovered It 08/07/2020 Theodd1 discovered it Namur, Belgium   Visit Log

Discovered in the TB/GC Gallery
Thank you very much for sharing.

Discovered It 08/07/2020 CCCL68 discovered it Namur, Belgium   Visit Log

Discovered in the TB/GC Gallery
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Discover: ZEZ2DP and more

Discovered It 03/11/2020 tihamster discovered it Namur, Belgium   Visit Log

vu dans logbook photo de GC81M4M

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