Changeset 219 in t29-www for en/computer/electron-tubes.shtm
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en/computer/electron-tubes.shtm
r185 r219 27 27 modern-looking monster features 188 electron tubes and belongs consequently to the first 28 28 generation of calculators. It has a wonderful glowing display. However, the 29 tube based computer can only compute withthe four basic arithmetic operations and30 cost ed the price of a VW beetle and an holiday trip.</p>29 tube based computer can only perform the four basic arithmetic operations and 30 cost as much as a VW Beetle and an holiday trip.</p> 31 31 32 32 <div class="box center auto-bildbreite"> … … 40 40 For the first time, you could multiply and divide without mechanics or noise. With a 41 41 3 kHz clock the device calculated ten times faster than the best contemporary 42 mechanical calculators. Anyway, technically speak en, the device was actually43 obsolete in 1962. The calculator works in decimal system, just as every other44 mechanical sprocket wheel machine . It still took twoyears until a transistorized desk42 mechanical calculators. Anyway, technically speaking, the device was actually 43 obsolete in 1962. The calculator works in decimal system, just like 44 mechanical sprocket wheel machines. It took two more years until a transistorized desk 45 45 calculator (IME 84) came onto the market. 46 46 </p> … … 50 50 <img src="/shared/photos/rechnertechnik/anita-innen.jpg" width="694" height="520" alt="Photography of Anita's 'inner life'" /> 51 51 <p class="bildtext"> 52 The "nightly" Anita inner life: The thyratrons flow redly, flashing during calculating.52 The "nightly" Anita inner life: The thyratrons glow red, flashing during calculations. 53 53 </p> 54 54 </div> … … 58 58 <img src="/shared/photos/rechnertechnik/anita-anzeige.jpg" width="396" height="268" alt="Anita's display" /> 59 59 <p class="bildtext"> 60 This is a part fromthe numeric display. The gas-filled nixie tubes61 (glow lamp 's principe) came onto the marktet just in time.60 This is part of the numeric display. The gas-filled nixie tubes 61 (glow lamp principle) came onto the marktet just in time. 62 62 </p> 63 63 </div> … … 69 69 <p> 70 70 The upper circuit board contains a ring counter. The gas-filled thyratrons are very small. This 71 was the only way to place approx. 177 pi ces into a manageable case. These relay tubes71 was the only way to place approx. 177 pieces into a manageable case. These relay tubes 72 72 have only two states like mechanical relays. 73 73 Additionally there are 11 vacuum tubes (ECC 81, left side) built into the calculator. 74 74 </p><p> 75 The complete counting decade with a nixie tube is shown below.75 The lower circuit board is a complete counting decade with a nixie tube. 76 76 </p> 77 77 </div>
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