5Y3

wtfactory

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font size="3"><span lang="ZH-CN" style="FONT-FAMILY: SimSun; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-fareast-language: ZH-CN; mso-ansi-language: ES;">请问</span><span lang="ES" style="mso-ansi-language: ES;"><font face="Times New Roman">5AR4 </font></span><span lang="ZH-CN" style="FONT-FAMILY: SimSun; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-fareast-language: ZH-CN;">和</span><span lang="ES" style="mso-ansi-language: ES;"><font face="Times New Roman">5U4G</font></span><span lang="ZH-CN" style="FONT-FAMILY: SimSun; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-fareast-language: ZH-CN;">可否直接代替</span><span lang="ES" style="mso-ansi-language: ES;"><font face="Times New Roman">5Y3?<p></p></font></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="ES" style="mso-ansi-language: ES;"><p><font face="Times New Roman" size="3">&nbsp;</font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="ZH-CN" style="FONT-FAMILY: SimSun; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-fareast-language: ZH-CN; mso-ansi-language: ES;"><font size="3">谢</font></span><span lang="ES" style="mso-ansi-language: ES;"><p></p></span></p>[em01]

wtfactory

<p>明白了,谢谢!</p><p>&nbsp;</p><p>&nbsp;</p>[em07][em07][em07]

Julien

<p>5U4G替换5Y3可能会造成变压器灯丝绕组过载，5U4G灯丝电流3A，5Y3灯丝电流2A，变压器灯丝绕组有裕量则替换无问题</p><p>5AR4和5Y3灯丝电流相同，但是为旁热式整流管，输出电压较高</p><p>当变压器次级交流有效电压较高，且滤波电容耐压裕量不足时，5AR4可能会造成电容击穿。当然这种可能性很小，因为5AR4预热时间更长，电源不处于空载状况，电压不会过高，一般是可以替换的</p>