preamp_line_2_eng.htm

内含各国最基础的电路图,并做了详细的说明,对做底层开发的人员很有用.

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        <td width="100%" height="674"><p align="center"><img
        src="preamp_2c.gif" tppabs="http://users.otenet.gr/~athsam/Circuits/preamp_line_2/preamp_2c.gif" width="1017" height="672"
        alt="preamp_2c.gif (26462 bytes)"></td>
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        <td width="100%" height="7"><b><span lang="EN-US"
        style="font-size:10.0pt;font-family:
Tahoma;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-language:EN-US;
mso-fareast-language:EL;mso-bidi-language:AR-SA">Power
        supply. </span></b></td>
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        <td width="100%" height="2"><span lang="EN-US"
        style="font-size:10.0pt;font-family:
Tahoma;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-language:EN-US;
mso-fareast-language:EL;mso-bidi-language:AR-SA"><font
        face="Tahoma"><span lang="EN-US"
        style="font-size:10.0pt;font-family:Tahoma;mso-ansi-language:EN-US">Essential condition
        for a high-End preamplifier, it is accompanied with proportional quality power supply. In
        the input of network supply exist JF1 plug that contains also filter EMI. Exist different
        supply circuit, for the sound section and the relay section, completely separated with
        different ground line. In the sound circuits section select the solution of double voltage
        stabilization. This topology creates a very powerful filter, which ensures very good
        ripple reject and noise results. Simultaneously it ensures small degree thermic and
        mechanic regulators fatiguing in the duration of time. The output voltage regulation of
        stabilizers becomes with multiturn trimmer that exist in each regulator. All the
        regulators should be placed in small heatsink. Regulator IC6 is not adjusted but constant
        out voltage +12V. In the relay supply line don抰 want something more. The use in the
        place of C31-32 capacitors with small capacity ensures fast uncharged at the main supply
        closure, so that opens fast the relay RL6 disconnect the preamplifier output. Thus no
        noises from uncharge of supply capacitor does not pass in the power amplifiers. The Zener
        D17 in combination with the R11 they create a voltage stable +12V so that is supplied the
        IC7.<span style="mso-spacerun: yes">&nbsp; </span>Transformer T1 good it is placed as long
        as more far it becomes from the sound circuits. <o:p></o:p></span></font></span></td>
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        <td width="100%" height="21"><font color="#FFFFFF">.</font></td>
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        <td width="100%" height="29"><table border="0" width="100%">
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            <td width="33%"></td>
            <td width="33%" bgcolor="#FFFF80"><p align="center"><font face="Tahoma" color="#FF0000"><small><strong>Part
            List For Power Supply [Fig.2]</strong></small></font></td>
            <td width="34%"></td>
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        </table>
        </td>
      </tr>
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        <td width="100%" height="255"><table border="0" width="100%" cellspacing="4">
          <tr>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>R1-6-7-10</strong>=170
            ohms</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">C27=470uF 25V</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>TR1.....TR4</strong>=10K
            ohms Multiturn Trimmer</font></small></td>
          </tr>
          <tr>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">R2-4=3.3K ohms</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">C30-32=4.7uF 25V</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>T1</strong>=230Vac
            @2X22V 50VA //12V 5VA</font></small></td>
          </tr>
          <tr>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">R3-5-8-9=15K ohms</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">C31=47uF 40V</font></small></td>
            <td width="34%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>S1</strong>=2step
            2contact Switch [230Vac 3A]</font></small></td>
          </tr>
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            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">R11=2.2K ohms 1W</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>B1</strong>=<a
            href="rectifier_bridge.jpg" tppabs="http://users.otenet.gr/~athsam/ylika/rectifier_bridge.jpg" target="_blank">Bridge Rectifier</a> 80V-3A</font></small></td>
            <td width="34%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>F1</strong>=1A Slo
            Blo Fuse</font></small></td>
          </tr>
          <tr>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>C1....C4</strong>=22nF
            100V MKT</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">B2=4 Diodes 1N4002</font></small></td>
            <td width="34%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>JF1</strong>=<a
            href="acfilter1.jpg" tppabs="http://users.otenet.gr/~athsam/ylika/acfilter1.jpg" target="_blank">3pin male supply jack with EMI Filter</a></font></small></td>
          </tr>
          <tr>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">C5.....C8=4700uF 63V</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>D1.....D6</strong>=1N4002</font></small></td>
            <td width="34%" bgcolor="#FFF2EC"></td>
          </tr>
          <tr>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">C9-10=1uF 100V MKT</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">D7=12V 0.4W Zener</font></small></td>
            <td width="34%" bgcolor="#FFF2EC"></td>
          </tr>
          <tr>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">C11-12-15-16-19-20-28-29=100nF
            100V</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma"><strong>IC1-2</strong>=LM317T
            [On Small <a href="heatsink.jpg" tppabs="http://users.otenet.gr/~athsam/ylika/heatsink.jpg" target="_blank">Heatsink</a>]</font></small></td>
            <td width="34%" bgcolor="#FFF2EC"><small><font face="Tahoma">All Registors is 1/4W 1%
            Metal film</font></small></td>
          </tr>
          <tr>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">C13-14-21-22-25-26=10uF 25V</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">IC3-4=LM337T [On Small
            Heatsink]</font></small></td>
            <td width="34%" bgcolor="#FFF2EC"><small><font face="Tahoma">For ICs Techical Data see my<strong>
            <a href="database.htm" tppabs="http://users.otenet.gr/~athsam/database.htm">Database</a></strong></font></small></td>
          </tr>
          <tr>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">C-17-18=100uF 40V</font></small></td>
            <td width="33%" bgcolor="#FFF2EC"><small><font face="Tahoma">IC5=LM7812 [On Small
            Heatsink]</font></small></td>
            <td width="34%" bgcolor="#FFF2EC"></td>
          </tr>
        </table>
        </td>
      </tr>
      <tr>
        <td width="100%" height="21"><font color="#FFFFFF">.</font></td>
      </tr>
      <tr>
        <td width="100%" height="18"><ul>
          <li><a href="javascript:if(confirm('http://users.otenet.gr/~athsam/preamp_line_2.htm  \n\nThis file was not retrieved by Teleport Pro, because it is linked too far away from its Starting Address. If you increase the in-domain depth setting for the Starting Address, this file will be queued for retrieval.  \n\nDo you want to open it from the server?'))window.location='http://users.otenet.gr/~athsam/preamp_line_2.htm'" tppabs="http://users.otenet.gr/~athsam/preamp_line_2.htm" target="_blank"><font face="Verdana"><strong><small>Audio
            Line High-End Preamplifier with 5 Line Inputs</small></strong></font></a></li>
        </ul>
        </td>
      </tr>
      <tr>
        <td width="100%" height="18"><ul>
          <li><small><font face="Verdana"><strong><a href="preamp_line_2_gr.htm" tppabs="http://users.otenet.gr/~athsam/preamp_line_2_gr.htm">Audio Line High-End
            Preamplifier with ICs</a> <font color="#FF0000">[In Greek]</font></strong></font></small></li>
        </ul>
        </td>
      </tr>
      <tr>
        <td width="100%" height="88"><p align="center">&nbsp;</p>
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            <td width="100%"><p align="center"><small><strong><font face="Westminster" color="#FF0000">Sam
            Electronic Circuits </font></strong><font color="#FF0000" face="Arial"><small><small>3/04</small></small></font></small></td>
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