{"id":3393,"date":"2024-01-04T14:42:39","date_gmt":"2024-01-04T05:42:39","guid":{"rendered":"https:\/\/www.kyu.kr\/?p=3393"},"modified":"2024-01-05T11:13:07","modified_gmt":"2024-01-05T02:13:07","slug":"%ea%b3%b5%eb%b6%80-ac-coupled-cathode-follower","status":"publish","type":"post","link":"https:\/\/www.kyu.kr\/?p=3393","title":{"rendered":"(\uacf5\ubd80) AC coupled Cathode Follower"},"content":{"rendered":"\n<p>\uc6d0\ubb38 : https:\/\/www.valvewizard.co.uk\/accf.html<\/p>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uce90\ud314\uc740 \ud55c \ud68c\ub85c\ub97c \ub2e4\ub978 \ud68c\ub85c\uc5d0 \uc5f0\uacb0\ud560 \ub54c \uac00\uc6b4\ub370 \ubc84\ud37c\ub85c \uc8fc\ub85c \uc0ac\uc6a9\ub41c\ub2e4\n<ul class=\"wp-block-list\">\n<li>\ub4a4 \ud68c\ub85c\uac00 \uc99d\ud3ed \uc190\uc2e4\uc744 \uc77c\uc73c\ud0a4\uc9c0 \uc54a\ub3c4\ub85d \ud558\uac70\ub098 \uc55e \ud68c\ub85c\uc5d0 \ubd80\ud558\ub97c \ub354\ud574\uc90c\uc73c\ub85c\uc368 \uc65c\uace1\uc744 \uc99d\uac00\uc2dc\ud0a4\uc9c0 \uc54a\ub3c4\ub85d \ud558\ub294  \uc758\ub3c4\ub85c \uc0ac\uc6a9\ub41c\ub2e4<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\uc785\ub825 \uc800\ud56d\uc740 \ub9e4\uc6b0 \ub192\uace0 \uc785\ub825 \uce90\ud328\uc2dc\ud134\uc2a4\ub294 \ub9e4\uc6b0 \ub0ae\ub2e4\n<ul class=\"wp-block-list\">\n<li>\uad11\ub300\uc5ed\ud3ed\uc774 \uc5bb\uc5b4\uc9c8 \uc218 \uc788\uace0 \uc544\uc8fc \uae34 \ucf00\uc774\ube14\ucc98\ub7fc capacitance\uac00 \ud070 \ubd80\ud558\ub97c \uad6c\ub3d9\ud560 \uc218 \uc788\ub2e4<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\ub2e4\ub9cc, AC coupled \uce90\ud314\uc740 \uc55e\uc5d0 \uc788\ub294 capacitor\uac00 quiescent \uadf8\ub9ac\ub4dc \uc804\ub958\ub97c \ub9c9\uace0 \uc788\uae30 \ub54c\ubb38\uc5d0 \uadf8\ub9ac \uc720\uc6a9\ud558\uc9c0 \uc54a\ub2e4\n<ul class=\"wp-block-list\">\n<li>\uadf8\ub798\uc11c \ud1a4 \ucc44\uc0c9\uc774 \uc5c6\ub294 \ubc84\ud37c \uc2a4\ud14c\uc774\uc9c0 \uc6a9\ub3c4\ub85c\ub9cc \uc4f0\uc778\ub2e4<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"225\" height=\"265\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image.png\" alt=\"\" class=\"wp-image-3394\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image.png 225w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-127x150.png 127w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/figure>\n<\/div>\n\n\n<ul class=\"wp-block-list\">\n<li>\ucd9c\ub825\uc740 Out1\uc5d0\uc11c \ubc14\ub85c \uc5bb\uc744 \uc218\ub3c4 \uc788\uace0, \uc140\ud504 \ubc14\uc774\uc5b4\uc2a4 \ud68c\ub85c\ub77c\uba74 \ubc14\uc774\uc5b4\uc2a4 \uc800\ud56d\uacfc \ub85c\ub4dc \uc800\ud56d \uc0ac\uc774\uc778 Out2\uc5d0\uc11c \uc5bb\uc744 \uc218\ub3c4 \uc788\ub2e4.\n<ul class=\"wp-block-list\">\n<li>\ud6c4\uc790\uac00 \ub354 \uc88b\ub2e4\uace0 \ubcf4\ub294\ub370, Rb\uac00 \uc9c4\uacf5\uad00\uc744 \ubd80\ud558 \uce90\ud328\uc2dc\ud134\uc2a4\ub85c\ubd80\ud130 \uaca9\ub9ac\uc2dc\ucf1c\uc8fc\uace0, \uc774\uac8c \uc548\uc815\uc131\uc744 \ub192\uc5ec\uc8fc\ub294 \ud6a8\uacfc\uac00 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4.<\/li>\n\n\n\n<li>\ubc18\ub300\ub85c \uc774\uc57c\uae30\ud558\uba74 \uae34 \ucf00\uc774\ube14\uc774 \ub2ec\ub9ac\ub294 \uc2dd\uc73c\ub85c \ubd80\ud558 \uce90\ud328\uc2dc\ud134\uc2a4\uac00 \ucee4\uc9c0\uba74 \uce90\ud314\uc740 \uc5c4\uccad\ub098\uac8c \ubc1c\uc9c4\ud560 \uc218 \uc788\ub2e4.<\/li>\n\n\n\n<li>\ub9ce\uc740 \ud68c\ub85c\uc5d0\uc11c Rb\uc5d0 \ubc14\uc774\ud328\uc2a4 \ucea1\uc744 \ub2e4\ub294\ub370, \uc774\ub7ec\uba74 \uc785\ub825 \uc784\ud53c\ub358\uc2a4\ub294 \ucee4\uc9c0\uc9c0\ub9cc, Rb\uac00 \uac00\uc9c4 \uc548\uc815\ud654 \ud6a8\uacfc\ub97c \ub2e4 \uc5c6\uc560\ubc84\ub9ac\uae30 \ub54c\ubb38\uc5d0 \uc194\uc9c1\ud788 \uc2dc\uac04 \ub0ad\ube44\uc774\ub2e4.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uce90\ud314\uc740 100% NFB\ub85c \ub3d9\uc791\ud558\ub294\ub370 \ub355\ubd84\uc5d0 \uc5c4\uccad\ub098\uac8c \ub9ac\ub2c8\uc5b4\ud558\uace0 \ucd9c\ub825 \uc800\ud56d\uc744 \ucd5c\uc18c\ud654\ud55c\ub2e4.\n<ul class=\"wp-block-list\">\n<li>\uc774\ub807\uac8c \uc7a5\uc810\uc774 \uc788\uc73c\uba74 \uc783\ub294\uac8c \uc788\ub294\ub370 \ubc14\ub85c gain\uc774\ub2e4 (1\ubc30 \ubbf8\ub9cc)<\/li>\n\n\n\n<li>\uadf8\ub7ec\ub2c8 \ubc84\ud37c\ub85c \uc368\uc57c \ud558\uace0 \uc804\ub958\ub97c \uc911\uac04 \ud639\uc740 \ub9ce\uc774 \ud758\ub9ac\ub294 \uad00\uc774 \uc88b\ub2e4. \uc989 12AX7 \uac19\uc740 \ub188\uc740 \ud0c8\ub77d\uc774\ub2e4.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>AC \uce90\ud314\uc758 \uc124\uacc4<\/p>\n\n\n\n<p>\uce90\ud314\uc5d0 \uc798 \uc5b4\uc6b8\ub9ac\ub294 12AU7\uc744 \uc368\ubcf4\ub3c4\ub85d \ud558\uc790. \ud754\ud558\uace0, \ud50c\ub808\uc774\ud2b8 \ub0b4\ubd80\uc800\ud56d\uc774 \ub0ae\uc544\uc11c \ud070 \ubd80\ud558\uc5d0 \uc0c1\ub300\uc801\uc73c\ub85c \ud070 signal swing\uc744 \ub9cc\ub4e4 \uc218 \uc788\uace0, \ud2b8\ub79c\uc2a4 \ucee8\ub355\ud134\uc2a4\uac00 \ub0ae\uc9c0 \uc54a\uc544\uc11c \uaf64 \ub0ae\uc740 \ucd9c\ub825 \uc784\ud53c\ub358\uc2a4\ub97c \ubcf4\uc774\ub294\ub370 \uc774 \ub355\ubd84\uc5d0 \uad11\ub300\uc5ed \ud2b9\uc131\uc774 \uac00\ub2a5\ud558\ub2e4. \uc30d\uc0bc\uadf9\uad00 \uc911\uc5d0 \ub0a8\ub294 \ud558\ub098\ub294 \uae30\ud0c0 \uc570\ud504\uc5d0\uc11c \ub3cc\uc544\uc624\ub294 \uc774\ud399\ud2b8 \uc2e0\ud638\ub97c \uc99d\ud3ed\ud558\ub294\ub370 \uc4f0\uba74 \ub41c\ub2e4<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub85c\ub4dc\ub77c\uc778 \uc120\uc815\n<ul class=\"wp-block-list\">\n<li>\ud50c\ub808\uc774\ud2b8 \ub85c\ub4dc\uac00 \uc544\ub2c8\uace0 \uce90\uc18c\ub4dc \ub85c\ub4dc\uc774\uc9c0\ub9cc \uc77c\ubc18\uc801 \ubc29\ubc95\uc73c\ub85c \uadf8\ub0e5 \ub85c\ub4dc\ub77c\uc778\uc744 \uadf8\ub9ac\uba74 \ub41c\ub2e4. <\/li>\n\n\n\n<li>\uc77c\ubc18\uc801\uc73c\ub85c Rk\ub294 \ub4dc\ub77c\uc774\ube0c\ud574\uc57c \ud560 \uc678\ubd80 \ub85c\ub4dc\uc758 \uc784\ud53c\ub358\uc2a4\ubcf4\ub2e4 \uc791\uac8c \uc120\uc815\ud55c\ub2e4. \uc548 \uadf8\ub7ec\uba74, \ub85c\ub4dc\ub77c\uc778\uc774 \ub108\ubb34 \ub9ce\uc774 \ud68c\uc804\ud574\uc11c \ucd9c\ub825\uc2e0\ud638\uc758 \uc2a4\uc719\uc774 (\ud5e4\ub4dc\ub8f8) \uc6d0\ud558\ub294 \uac83\ubcf4\ub2e4 \ub108\ubb34 \uc791\uac8c \ub41c\ub2e4<\/li>\n\n\n\n<li>\uadf8\ub7ec\ub2c8 \uad00\uc758 \ub0b4\ubd80 \uc800\ud56d\uc774 \uac00\ub2a5\ud55c \uc791\uc740 \uac83\uc774 \uc88b\ub2e4. (\uc804\uc6d0\ubd80 \uc124\uacc4\uc5d0 \uc720\ub9ac\ud568)<\/li>\n\n\n\n<li>\uac00\ub2a5\ud55c \uac00\uc7a5 \ud070 \ud50c\ub808\uc774\ud2b8 \uc804\ub958\uc5d0\uc11c \ub3d9\uc791\ud558\ub294 \uac83\uc774 \ub300\uc5ed\ud3ed\uc744 \ucd5c\ub300\ud654\ud558\uac8c \ub41c\ub2e4. \uc544\ub798\uc5d0\uc11c\ub294 18K \ubd80\ud558\ub97c \uc120\uc815\ud588\ub294\ub370 10K\ub97c \uc120\uc815\ud588\uc744 \ub54c\uc640 \ube44\uad50\ud574\uc11c \uc2a4\uc719\uc774 \uadf8\ub2e5 \uafc0\ub9ac\uc9c0 \uc54a\ub294\ub2e4. HT\ub294 280V\ub2e4.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"558\" height=\"374\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-1.png\" alt=\"\" class=\"wp-image-3395\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-1.png 558w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-1-150x101.png 150w\" sizes=\"auto, (max-width: 558px) 100vw, 558px\" \/><\/figure>\n<\/div>\n\n\n<ul class=\"wp-block-list\">\n<li>Biasing\n<ul class=\"wp-block-list\">\n<li>\ubc84\ud37c\ub97c \uc124\uacc4\ud558\ub294 \uc911\uc774\ubbc0\ub85c \ud5e4\ub4dc\ub8f8\uc744 \ucd5c\ub300\ud654\ud558\uace0 \ucd9c\ub825 \uc784\ud53c\ub358\uc2a4\ub97c \ucd5c\uc18c\ud654\ud560 \uc218 \uc788\ub294 \ubc14\uc774\uc5b4\uc2a4 \uc810\uc744 \ucc3e\ub3c4\ub85d \ud558\uc790. \uc704\uc5d0\uc11c\ub294 -3.5V\ub97c \uc120\ud0dd\ud588\ub294\ub370 \ubcf4\ub77c\uc0c9 AC \ub85c\ub4dc\ub77c\uc778\uc740 \uc120\ud0dd\ud55c 18K\uc5d0 \ubcd1\ub82c\ub85c 10K\uc758 \uc678\ubd80 \ubd80\ud558\ub97c \uc92c\uc744 \ub54c\uc758 \ub85c\ub4dc\ub77c\uc778\uc774\ub2e4. \uc774 \ub54c \ubcf4\uba74 \ucd5c\ub300 \ucd9c\ub825 \uc2a4\uc719\uc740 32Vpeak\ub85c more than enough \ud558\ub2e4<\/li>\n\n\n\n<li>\ucd9c\ub825 \uc784\ud53c\ub358\uc2a4\ub294 Z<sub>o<\/sub> = 1 \/ g<sub>m<\/sub> \uc774\ubbc0\ub85c\n<ul class=\"wp-block-list\">\n<li>\ubc14\uc774\uc5b4\uc2a4 \ud3ec\uc778\ud2b8\uc5d0\uc11c \ubcf4\uba74 g<sub>m<\/sub> \uc740 2.5mA\/V\uc774\ubbc0\ub85c 1 \/ g<sub>m<\/sub> \uc740 1\/0.0025 = 400 ohm\uc774\ub2e4. \ucda9\ubd84\ud788 \ub0ae\ub2e4.<\/li>\n\n\n\n<li>\ub300\ub7b5\uc801\uc73c\ub85c gain\uc744 \uad6c\ud574 \ubcf4\uba74 A = mu \/ (mu+1) = 19\/(19+1) = 0.96<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"217\" height=\"258\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-2.png\" alt=\"\" class=\"wp-image-3397\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-2.png 217w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-2-126x150.png 126w\" sizes=\"auto, (max-width: 217px) 100vw, 217px\" \/><\/figure>\n<\/div>\n\n\n<ul class=\"wp-block-list\">\n<li>\uc140\ud504 \ubc14\uc774\uc5b4\uc2a4: \n<ul class=\"wp-block-list\">\n<li>\ud604\uc7ac Ia\ub294 \uc57d 8mA, Vg=\uc57d -3.5V \uc774\ubbc0\ub85c Rb = Vg\/Ia = 3.5\/0.008 = 437.5 ohm. \uc2dc\ud310 \uc800\ud56d\uac12\uc5d0\uc11c \uac00\uae4c\uc6b4 \uac83\uc744 \ucc3e\uc73c\uba74 470R\uc774 \ub41c\ub2e4. \uc774 \ub54c Rk\uc758 \uc804\ub825 \uc18c\ubaa8\ub294 8mA^2 * 18K = 1.15W \uc815\ub3c4 \ub41c\ub2e4. \uadf8\ub9bc\uc5d0\uc11c\ub294 2W\uae09\uc744 \uc120\ud0dd\ud588\ub2e4<\/li>\n\n\n\n<li>Rgk\ub294 \ub298 \uc4f0\ub294 1M\ub97c \uc368\ub3c4 \ub418\ub294\ub370 \ub192\uc740 \uc785\ub825 \uc784\ud53c\ub358\uc2a4\ub97c \uc720\uc9c0\ud558\ub294 \ud55c\uc5d0\uc11c \ub354 \ub0ae\ucdb0\ub3c4 \ub41c\ub2e4. \uadf8\ub798\ub3c4 \ub418\ub294 \uc774\uc720\ub294 bootstrapped\ub77c\ub294 \ud604\uc0c1 \ub54c\ubb38\uc778\ub370, AC \uc2e0\ud638\uc5d0 \uad00\ud574\uc11c\ub294 \uadf8\ub9ac\ub4dc \ub9ac\ud06c \uc800\ud56d\uce58\uac00 \ud655\ub300\ub418\uc5b4 \ubcf4\uc774\uae30 \ub54c\ubb38. \uc774\ub7f0 \ud604\uc0c1\uc774 \uc0dd\uae30\ub294 \uc774\uc720\ub294 \uce90\uc18c\ub4dc\uc5d0 \ub098\ud0c0\ub098\ub294 \uc2e0\ud638\ub294 gain\ub9cc \uc0b4\uc9dd \uc904\uc5b4\ub4e4\uc5c8\uc744 \ubfd0, \uc704\uc0c1\uc774 \uac19\uc544\uc11c, Rgk \uc544\ub798\uc758 \uc2e0\ud638\uc640 Rgk \uc704\uc758 \uc2e0\ud638\ub294 \uac70\uc758 \uac19\uac8c \ub418\ubbc0\ub85c AC \uc804\ub958\uac00 \uac70\uc758 \ud750\ub974\uc9c0 \uc54a\uac8c \ub418\uae30 \ub54c\ubb38\uc774\ub2e4. R = V\/I\uc774\ubbc0\ub85c I\uac00 \ub9e4\uc6b0 \uc791\uc73c\uba74 R\uc774 \ub9e4\uc6b0 \ucee4\uc9c0\ub294 \uc148\uc774\ub2e4. \ub2e4\uc74c\uc758 \uc218\uc2dd\uacfc \uac19\ub2e4.\n<ul class=\"wp-block-list\">\n<li>Zin = Rg \/ (1-A) = 470K \/ (1-0.95) = 9.4Mohm<\/li>\n\n\n\n<li>\ub355\ubd84\uc5d0 \uc800\uc5ed \uc190\uc2e4 \uac71\uc815\uc5c6\uc774 \uc785\ub825 \ucee4\ud50c\ub9c1 \ucea1\uc744 \ub9e4\uc6b0 \uc791\uac8c \uac00\uc838\uac00\ub3c4 \ub41c\ub2e4.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\uc785\ub825 \uce90\ud328\uc2dc\ud134\uc2a4\n<ul class=\"wp-block-list\">\n<li>Anode\uac00 \uc77c\uc815\ud558\uac8c \uba38\ubb3c\ub7ec \uc788\uc73c\ubbc0\ub85c \ubc00\ub7ec \ud6a8\uacfc\ub294 \uc5b5\uc81c\ub418\uace0, \ub0b4\ubd80 \ud53c\ub4dc\ubc31 \ub54c\ubb38\uc5d0 Cgk (grid to cathode capacitance) \ub610\ud55c bootstrapped \ub418\uc5b4 \uc784\ud53c\ub358\uc2a4\uac00 \ud655\ub300\ub418\uc5b4 \ubcf4\uc778\ub2e4. \uc774 \ub9d0\uc740 \uce90\ud328\uc2dc\ud134\uc2a4\uac00 \ucd95\uc18c\ub41c\ub2e4\ub294 \ub9d0\uacfc \uac19\ub2e4. \uadf8\ub7ec\ubbc0\ub85c \uc785\ub825 \uce90\ud328\uc2dc\ud134\uc2a4\ub294 10pF\ubcf4\ub2e4 \uc791\uc544\uc9c0\uba70 \uac70\uc758 \ubb34\uc2dc\ud574\ub3c4 \uc88b\ub2e4.<\/li>\n\n\n\n<li>\ubc1c\uc9c4 \uc5b5\uc81c\uc6a9\uc73c\ub85c \uadf8\ub9ac\ub4dc \uc2a4\ud1a0\ud37c\ub97c 1K~10K \ub123\uc544\ub3c4 \uc0c1\uad00\uc5c6\ub2e4. \uc785\ub825 \uce90\ud328\uc2dc\ud134\uc2a4\uac00 \ub9e4\uc6b0 \uc791\uc73c\ubbc0\ub85c \ub354 \ud070 \uc800\ud56d\uac12\uc744 \uc368\ub3c4 \ub41c\ub2e4.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\uce90\uc18c\ub4dc \uc804\uc555\uc774 \ub9e4\uc6b0 \ub192\uc744 \uc218 \uc788\uc73c\ubbc0\ub85c \ud788\ud130 \ud50c\ub85c\ud305\uc744 (Heater elevation) \ud574\uc57c \ud55c\ub2e4. 12AU7\uc740 Vhk\uac00 180V\uc778\ub370, \uc704\uc758 \uadf8\ub9bc\uc758 \uacbd\uc6b0\uc5d0\ub294 \ub85c\ub4dc\ub77c\uc778\uc5d0\uc11c \ubcf4\uba74 Vak\uac00 140V\uc774\ubbc0\ub85c 280V &#8211; 140V = 140V\uac00 \ub418\uc5b4\uc11c 180V\ub77c\ub294 \uc2a4\ud399\ubcf4\ub2e4 \ub0ae\uae30\ub294 \ud558\ub2e4. \ud558\uc9c0\ub9cc \ud788\ud130 \uc804\uc555\uc744 30V\ucbe4 \ub192\ud600\uc900\ub2e4\uace0 \ud574\uc11c \uc190\ud574\ubcfc \uac83\uc740 \uc5c6\ub2e4.\n<ul class=\"wp-block-list\">\n<li>\ucd9c\ub825\ub2e8\uc73c\ub85c \uc5f0\uacb0\ud560 \ub54c \ucee4\ud50c\ub9c1 \ucea1\uc744 \ub2ec\uc544\uc57c \ub41c\ub2e4.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"215\" height=\"249\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-3.png\" alt=\"\" class=\"wp-image-3398\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-3.png 215w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2024\/01\/image-3-130x150.png 130w\" sizes=\"auto, (max-width: 215px) 100vw, 215px\" \/><\/figure>\n<\/div>\n\n\n<ul class=\"wp-block-list\">\n<li>\uace0\uc815 \ubc14\uc774\uc5b4\uc2a4\n<ul class=\"wp-block-list\">\n<li>\uc140\ud504 \ubc14\uc774\uc5b4\uc2a4 \ub300\ube44 \uace0\uc815 \ubc14\uc774\uc5b4\uc2a4\uc758 \uc774\uc810\uc740 \uc8fc\ud30c\uc218\/\ubd80\ud558 \ubcc0\ub3d9\uc5d0 \ub300\ud574\uc11c \uc785\ucd9c\ub825 \uc784\ud53c\ub358\uc2a4\uac00 \ub354 \uc77c\uc815\ud558\ub2e4\ub294 \uc810\uc774\ub2e4. \uc885\uc774\uc5d0 \uadf8\ub9ac\uba74\uc11c \uc0c1\uc0c1\ud558\ub294 \ub3d9\uc791\uc740 \uc140\ud504\ubcf4\ub2e4\ub294 \uace0\uc815\uc5d0\uc11c \ub354 \uc27d\uac8c \uc5bb\uc744 \uc218 \uc788\ub2e4.<\/li>\n\n\n\n<li>\ub85c\ub4dc\ub77c\uc778\uc73c\ub85c \ub2e4\uc2dc \ub3cc\uc544\uac00\uc11c \ud50c\ub808\uc774\ud2b8-\uce90\uc18c\ub4dc \uac04 \uc804\uc555\uc740 140V\uc774\ubbc0\ub85c \uce90\uc18c\ub4dc-\uadf8\ub77c\uc6b4\ub4dc \uac04 \uc804\uc555\uc740 280-140=140V\uc5ec\uc57c \ud55c\ub2e4. -3.5V \ubc14\uc774\uc5b4\uc2a4\uc774\ubbc0\ub85c \uadf8\ub9ac\ub4dc\ub294 (136.5V) \uce90\uc18c\ub4dc\ubcf4\ub2e4 (140V) 3.5V \ub0ae\uc544\uc57c \ud55c\ub2e4. \uc804\uc555 \ubd84\ubc30 \uc800\ud56d\uc73c\ub85c 136.5V\ub97c \ub9de\ucd94\ub824\uace0 \uc2dc\ub3c4\ud560 \uc218\ub3c4 \uc788\uc73c\ub098 \uadf8\ub7f4 \ud544\uc694\ub294 \uc5c6\uc73c\ub2c8, \ud68c\ub85c\ub294 \uad49\uc7a5\ud788 self-adjust \ud558\uae30 \ub54c\ubb38\uc774\ub2e4.\n<ul class=\"wp-block-list\">\n<li>\uadf8\ub7ec\ubbc0\ub85c \uadf8\ub0e5 10Meg ohm \uc800\ud56d\uc744 \ub450 \uac1c \uc368\uc11c 140V\ub97c \ub9de\ucdb0\ub3c4 \ub41c\ub2e4. \uc774\ub807\uac8c \ud070 \uc800\ud56d\uc744 \uc4f0\ub294 \uc774\uc720\ub294 \ud604\uc7ac \uac78\ub9ac\uace0 \uc788\ub294 100% NFB\uac00 \uadf8\ub9ac\ub4dc \uc804\ub958\uc5d0 \ub300\ud574\uc11c \ubc14\uc774\uc5b4\uc2a4\ub97c \ub9de\ucd94\ub824\uace0 \ud558\uae30 \ub54c\ubb38\uc774\ub2e4.<\/li>\n\n\n\n<li>\uc785\ub825 \uc784\ud53c\ub358\uc2a4\ub294 10M ohm\uc758 \ubcd1\ub82c \uc131\ubd84\uc774 \ub418\uc5b4 5M ohm\uc774 \ub418\ub294\ub370, \uc140\ud504\uc758 9.4M ohm\ubcf4\ub2e4 \ub0ae\uae30\ub294 \ud558\uc9c0\ub9cc \uc5ec\uc804\ud788 \ucda9\ubd84\ud558\ub2e4.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\uadf8\ub9ac\ub4dc\uc640 \uce90\uc18c\ub4dc \uc0ac\uc774\uc5d0 \ub2e4\uc774\uc624\ub4dc\ub97c \ud558\ub098 \ub123\uc5b4\uc8fc\uc5b4\uc57c \ud788\ud130\uac00 \ucda9\ubd84\ud788 \ub2ec\uad88\uc9c0\uae30 \uc804\uc5d0 \ubc88\uac1c\uac00 \uce58\ub294 \uac83\uc744 \ubc29\uc9c0\ud560 \uc218 \uc788\ub2e4. \uc9c4\uacf5\uad00\uc774 \uc815\uc0c1\uada4\ub3c4\uc5d0 \uc624\ub974\uba74 \ub2e4\uc774\uc624\ub4dc\ub294 \uaebc\uc9c0\uac8c \ub41c\ub2e4. <\/li>\n\n\n\n<li>\uc774\uc81c Rb\uac00 \uc5c6\uc73c\ubbc0\ub85c \uc9c4\uacf5\uad00\uc744 \ubd80\ud558 \uce90\ud328\uc2dc\ud134\uc2a4\ub85c\ubd80\ud130 \ubd84\ub9ac\uc2dc\ucf1c\uc8fc\uae30 \uc704\ud574 100\uc634 &#8216;build out&#8217; \uc800\ud56d\uc744 \ub2ec\uc544\uc8fc\uc5b4\uc57c \uc548\uc815\uc131\uc744 \ub3c4\ubaa8\ud560 \uc218 \uc788\ub2e4. \ub9c8\uce58 \uadf8\ub9ac\ub4dc \uc2a4\ud1a0\ud37c\ucc98\ub7fc&#8230;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\uc6d0\ubb38 : https:\/\/www.valvewizard.co.uk\/accf.html AC \uce90\ud314\uc758 \uc124\uacc4 \uce90\ud314\uc5d0 \uc798 \uc5b4\uc6b8\ub9ac\ub294 12AU7\uc744 \uc368\ubcf4\ub3c4\ub85d \ud558\uc790. \ud754\ud558\uace0, \ud50c\ub808\uc774\ud2b8 \ub0b4\ubd80\uc800\ud56d\uc774 \ub0ae\uc544\uc11c \ud070 \ubd80\ud558\uc5d0 \uc0c1\ub300\uc801\uc73c\ub85c \ud070 signal swing\uc744 \ub9cc\ub4e4 \uc218 \uc788\uace0, \ud2b8\ub79c\uc2a4 \ucee8\ub355\ud134\uc2a4\uac00 \ub0ae\uc9c0 \uc54a\uc544\uc11c \uaf64 \ub0ae\uc740 \ucd9c\ub825 \uc784\ud53c\ub358\uc2a4\ub97c \ubcf4\uc774\ub294\ub370 \uc774 \ub355\ubd84\uc5d0 \uad11\ub300\uc5ed \ud2b9\uc131\uc774 \uac00\ub2a5\ud558\ub2e4. \uc30d\uc0bc\uadf9\uad00 \uc911\uc5d0 \ub0a8\ub294 \ud558\ub098\ub294 \uae30\ud0c0 \uc570\ud504\uc5d0\uc11c \ub3cc\uc544\uc624\ub294 \uc774\ud399\ud2b8 \uc2e0\ud638\ub97c \uc99d\ud3ed\ud558\ub294\ub370 \uc4f0\uba74 \ub41c\ub2e4<\/p>\n","protected":false},"author":1,"featured_media":3394,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[453,473,108],"tags":[471,472],"class_list":["post-3393","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-453","category-473","category-108","tag-ac-coupled-cathode-follower","tag-the-valve-wizard"],"_links":{"self":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/3393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3393"}],"version-history":[{"count":2,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/3393\/revisions"}],"predecessor-version":[{"id":3399,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/3393\/revisions\/3399"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/media\/3394"}],"wp:attachment":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}