Changeset 283 in t29-www for en


Ignore:
Timestamp:
Aug 15, 2012, 2:30:21 PM (7 years ago)
Author:
heribert
Message:

Heriberts Änderungen an der alten Homepage, während die neue entwickelt wurde.

Location:
en
Files:
6 edited

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  • en/communication/measurement.shtm

    r244 r283  
    2020    <h2><!--#echo var="title" --></h2>
    2121
    22     <p>Measurement- and Experimental technology can link Communication and Computer
     22    <p>Measurement and Experimental technology can link Communication and Computer
    2323       Technology. Measurement technology has a long history and there have been nice and
    2424       remarkable devices.</p>
     
    4242            <img src="/shared/photos/kommunikationstechnik/universalmessgeraet.jpg" alt="Fotografie des Universalmeßgerätes" width="396" height="325" />
    4343            <p class="bildtext">
    44                This is a remarkably functional, big and beautiful all-purpose measurement device made by Siemens &amp; Halske (about 1905). At that time even simple objects of utulity were made lovely detailed. This device was used as auxiliary device for morsing purposes in the national administration of the German Empire.
     44               This is a remarkably functional, big and beautiful all-purpose measurement device made by Siemens &amp; Halske (about 1905). At that time even simple objects of utility were made with lovely details. This device was used as an auxiliary device for morsing purposes in the national administration of the German Empire.
    4545            </p>
    4646      </div>
     
    8383        <img src="/shared/photos/kommunikationstechnik/loewe-kathodenstrahl.jpg" alt="Photography of the cathode ray tube" width="396" height="189" />
    8484        <p class="bildtext">
    85             At the time where there was no television and no oscilloscope yet, the
    86             <b>Cathode Ray Tube</b> was a sensation, especially at school. This was one of
    87             the very first experiments where students could see that electrons have
    88             almost no inertia, so they can be deflected easily at the presence of an
    89             electric field.
    90             <br/>This tube (with power supply on the left) from the German company
    91             <b>Loewe</b> is an historical piece from the 1930s. It measures about
    92             50&nbsp;cm!
     85            Before television and oscilloscopes, the <b>Cathode Ray Tube</b> was a sensation, especially in schools. This was one of the very first experiments where students could see that electrons have almost no inertia, so they can be deflected easily in the presence of an electric field. This tube (with power supply on the left) from the German company <b>Loewe</b> is an historical piece from the 1930s. It measures about 50 cm!
    9386        </p>
    9487   </div>
     
    10093                  <p class="bildtext">
    10194              After the currency reform in West Germany, the production
    102               of mesurement devices got going again. This AEG
     95              of mesurement devices got going again. This <b>AEG</b>
    10396              oscilloscope was built in 1949. It seems to be an exact
    10497              replica from an AEG device of the late thirties. It is
     
    10699              market at 1938. Neither the time base of the horizontal
    107100              deflection nor the amplitude of the vertical deflection
    108               are callibrated by the manufacturer. To measure
     101              are calibrated by the manufacturer. To measure
    109102              absolutely with this device, you always need reference sizes.
    110103          </p>
     
    114107          <img src="/shared/photos/kommunikationstechnik/phywe-oszi.jpg" alt="Photography of a Phywe demonstration oscilloscope" width="396" height="269" />
    115108          <p class="bildtext">
    116              The "Physikalischen Werkst&auml;tten" (<i>phsyical facilities</i>), <b>Phywe</b>,
    117              have built this small oscilloscope for demonstration purposes that can be
     109             The "Physikalischen Werkstätten" (<i>phsyical facilities</i>), <b>Phywe</b>,
     110             built this small oscilloscope for demonstration purposes. It can be
    118111             used to show the electromagnetic interaction of an electron beam in E/B fields.
    119              Since (CRT driven) television got a mass medium, these experiments
    120              were state-of-art at those days.
     112             Since (CRT driven) television was not yet a mass medium, these experiments
     113             were state-of-art in those days.
     114                         
    121115          </p>
    122116       </div>
     
    133127The Type 555 was first sold in 1963 and is a true dual-beam oscilloscope with two individual time bases. This makes it superior compared with traditional dual-channel oscilloscopes with only a single time base and an electronic chopper for the dual-channel display. <br>
    134128The 555 features a separate power supply which is sitting on the bottom of the oscilloscope cart (a scope mobile). All in all the 555 contains about 100 tubes - an extraordinary amount for such a device. As a result the power requirement of the 555 is quite high with about 1 kW.<br>
    135 The maximum signal frequency that can be displayed with the 555 is 33 MHz - an outstanding value for the time. Oscilloscopes like the 555 were normally carried from one place to another by a cart (it is next to impossible to lift such a device as a single person). Therefore the scope mobile often had storage space for additional modules that were not regularly used.<br>
    136 The 555 on display is in mint condition - a rare circumstance since most  oscilloscopes from this time show signs of their heavy duty use.<a  class="popup" href="/shared/photos/kommunikationstechnik/555.jpg"><b> A high resolution picture of the 555</b></a> can be seen here.</a><br>
    137 The Type 564 oscilloscope on the scope mobile on the right uses a bistable storage tube - a technology that was not mature at this time. These tubes were characterized by a short life time. Most notably the brightness of the display decreased rapidly with time and the maximum beam velocity for
     129The maximum signal frequency that can be displayed with the 555 is 33 MHz - an outstanding value for the time. Oscilloscopes like the 555 were normally carried from one place to another on a cart (it is next to impossible for a single person to lift such a device). Therefore the scope mobile often had storage space for additional modules that were not regularly used.<br>
     130The 555 on display is in mint condition---a rare circumstance since most  oscilloscopes from this time show signs of their heavy duty use.<a class="popup" href="/shared/photos/kommunikationstechnik/555.jpg">  <b>A high resolution picture of the 555</b></a> can be seen here.<br>
     131
     132The Type 564 oscilloscope on the scope mobile on the right uses a bistable storage tube---a technology that was not mature at this time. These tubes were characterized by a short lifetime. Most notably the brightness of the display decreased rapidly with time and the maximum beam velocity for
    138133storing images was about 500 cm/ms.<br>
    139134Below the 564 is a Tektronix Type 453 - a small oscilloscope which is quite difficult to service and repair due to its small physical size. By the way: Modern Tektronix oscilloscopes offer bandwidths up to 80GHz!
     
    147142        <p class="bildtext">This big white board is an experience system from
    148143          <b>Leybold</b> from the early 1970s. At that time, the subject
    149           "digital electonics" was taught in the school. Students could set up
    150           logic systems like binary counters, full adders, flip-flops, multiplexer,
     144          "digital electronics" was taught in schools. Students could set up
     145          logic systems like binary counters, full adders, flip-flops, multiplexers,
    151146          etc. This was quite fascinating for students at that time. Today, in ordinary
    152           schools, there is no more time for electronics in the curriculars.</p>
     147          schools, there is no more time for electronics in the curriculum.</p>
    153148    </div>
    154        
    155         <h3>The world of electronical calculating</h3> <!-- schleim... -->
     149                 
     150        <h3>The world of electronical calculating</h3>
    156151
    157152    <div class="box left clear-after">
    158153       <img src="/shared/photos/kommunikationstechnik/frequenzzaehler.jpg" alt="Photography of different frequency- and event counters" width="420" height="582" />
    159154       <p class="bildtext"><b>Calculating requires counting</b>
    160          <br/>Last but not least we show a composition of (frequency) counters from
     155         <br/>Last but not least, we show a composition of (frequency) counters from
    161156         different epoches. There are, among others, devices equipped with tubes (57
    162157         electron tubes) or discrete transistor logic (mostly germanium).
  • en/communication/television.shtm

    r243 r283  
    5050        <div class="bildtext">
    5151            <b>Saba Telerama</b>
    52             <p>Since 1956, the German company SABA produced projection TV-sets. The advertisements said you could even watch television in light rooms which are not shaded. This promise was exaggerated: Only with a special projection screen (made by Saba) which reflects the light primarily in one direction, you can see a sufferable image. Clicking on the picture will show you an <a href="/en/devices/saba-telereama.shtm" class="go">explanation of the Telerama projection technology.</a></p>
     52            <p>Since 1956, the German company SABA produced projection TV-sets. The advertisements said you could even watch television in light rooms which are not shaded. This promise was exaggerated: Only with a special projection screen (made by Saba) which reflects the light primarily in one direction, you can see a sufferable image. Clicking on the picture will show you an <a href="/en/devices/saba-telereama.shtm" class="go"> explanation of the Telerama projection technology.</a></p>
    5353            <p>On the right hand in the background you can see a multifunctional device made by Nordmende to see television, hear to broadcasting and gramophone records. On the left the concurrency device with the same features made by Telefunken. They are both made in 1954.</p>
    5454            </div>
  • en/devices/saba-telerama.shtm

    r151 r283  
    3030  <img src="/shared/photos/kommunikationstechnik/telerama-schmitt-optik.jpg" alt="Telerama-Schmitt-Optik" width="574" height="356" />
    3131  <div class="bildtext-bildbreite" style="width: 574px;">
    32       <p>The <b>Schmitt lenses</b>, demounted from the Saba Telerama projection TV-set.
     32      <p>The <b>Schmitt lenses</b>, as used in the Saba Telerama projection TV-set.
    3333  </div>
    3434</div>
    3535
    3636<p>
    37          The CRT (6&nbsp;cm diameter) is partly visible in the pice. The light
    38          coming from this tube caroms on the concave mirror (in the picture laying on
    39          the floor). Afterwards it is adjusted by an special lens (on the right of the
    40          box) and leaves the box, arriving at the projection screen.
    41          <br />During this long way the original picture which is about
    42          4,5cm&nbsp;x&nbsp;3,5cm big is scaled up to 123cm&nbsp;x&nbsp;97,5cm on the
    43          projection screen. Consequently, the luminosity is decreasing enormously.
    44          If you compute the final fraction of the original luminosity, you'll
    45          understand, why this projection TV had to be set in a totally shaded room.</p>
     37         The CRT (6 cm diameter) is partly visible in the picture. The light coming from this tube reflects on to the concave mirror (on the floor). The reflected light is adjusted by a special lens (on the right of the box) and leaves the assembly, arriving at the projection screen. During this process, the original picture, about 4,5cm x 3,5cm, is scaled up to 123cm x 97,5cm on the projection screen. Consequently, the luminosity is reduced enormously. Consequently, this projection TV needed to be viewed in an almost totally shaded room.</p>
    4638</p>
    4739
  • en/inc/menu.inc.shtm

    r210 r283  
    112112
    113113<div id="copyright">
    114     &copy; 2003-2010 technikum29. You must not use contents and photographies without the permission of the owner.
     114    &copy; 2003-2012 technikum29. You must not use contents and photographies without the permission of the owner.
    115115    <a class="go" href="/en/contact.shtm">Legal Information</a>.
    116116</div>
  • en/index.shtml

    r184 r283  
    4646           <h2>What's special about it?</h2>
    4747           <ul>
    48                <li>Our museum shows the interesting development of technology
     48              <li>Our museum shows the interesting development of technology
    4949                   that strongly influences our life</li>
    5050               <li>In contrast to similar museums that normally only exhibit
    5151                   the history of technology without showing their functionality,
    52                    almost all devices in the technikum29 are operative and are
     52                   almost all devices in the technikum29 are operational and are
    5353                   demonstrated during the guided tours. So you get a totally
    5454                   different picture of that time. This is quite absolutely
     
    9090            <h2>Opening hours</h2>
    9191            <ul>
    92                 <li>We currently accept only group registrations (at least 5
    93                     persons). Dating requests are accepted until five days
    94                     before the favored date.</li>
     92                       
     93                <li>We currently accept only group bookings (at least 8 people). Requests are accepted until five days before the favored date. </li>
    9594                </li>
    9695            </ul>
  • en/miscellaneous.shtm

    r253 r283  
    2828
    2929    <p>
    30        It's a great experience see and hear such old jukeboxes, typically made
    31        only of natural materials like leather, gum, wood, bone glue, felt, metal, paper,
    32        ivory and glas.
    33        <br/>By assembling these elements on an intelligent way, one could
    34        build a simple mechanical machine which is especially impressive
    35        for today's people. Here at the technikum29, we will show you how
    36        this device works, we will explain the basic functionality and
    37        play challenging compositions. While having covers removed, you can
    38        even see the fascinating mechanics working.
     30         It's a great experience see and hear such old jukeboxes, typically made only of natural materials like leather, gum, wood, bone glue, felt, metal, paper, ivory and glass.<br/>
     31         By assembling these elements in an intelligent way, one could build a simple mechanical machine which is especially impressive for today\'s people. Here at the technikum29, we will show you how this device works, we will explain the basic functionality and play challenging compositions. While having covers removed, you can even see the fascinating mechanics working.
    3932    </p>
    4033
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