esr schematic 052514

2
 8 1 2 3 4 V + V - + A 7 6 5 B + TL082 8 1 2 3 4 V + V - + A 7 6 5 B + TL082 U 1 C1 1 u F R 1 10 K C2 1 u F R 2 10 K R 18 120 D 5 - 4.5 9 V DC BT 1 + + + + 4.5 - 4.5 + 4.5 - 4.5 + 4.5 + 4.5 U 2 + 4.5 R1 3 1K RED BLACK T es t Leads ESR QST April 14 - by KG4BZW R14 27K R9 1K R8 1K R1 0 22 R11 22 D 1 D 2 R7 47K Q1 R6 27K R5 10K R3 * 2.4K R4 10K C3 0.001 R12 1K R15 27K R1 9 15K R2 0 81 Q2 3904 + C6 1 u F D6 M1 100 uA R17 5K D4 1N4418 D3 C5 1 u F + R16 47K C4 0. 1 104 S 1 KB4_ESR_01.cdd - 05-24-14 S p lit Rai l S upply 10 0 KHz Oscil lat or Co mparator / Ampli fier Pr eci si o n Rectifier Capaci t or S ho rted / Leaky Indic ato r with test leads shorted meter reads full scale (0 ohm) with tes t le ad open meter r eads 0 u A ( ) E B C Q1 - 3906 E B C Q2 - 3904 R3 * 2 . 7 K - 86.5 KHz  2.2 K - 96.3 KHz  R10 & 11 match ed T P NOTE: us e 10K po t (R17) wi t h 50 uA me te r a n d 2.2K R3 ( GNX ve rsion )  

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  • 81 2 3 4

    V+

    V -+A

    7 6 5

    B +TL082

    8

    1 2 3 4

    V+

    V -+A

    7 6 5

    B +TL082

    U 1

    C11 uF

    R 110 K

    C21 uF

    R 210 K

    R 18120 D 5

    - 4.5

    9 V DC

    BT 1+

    + +

    + 4.5 - 4.5

    + 4.5

    - 4.5

    + 4.5

    + 4.5

    U 2+ 4.5

    R131K

    RED BLACKTest Leads

    ESR QST April 14 - by KG4BZW

    R1427K

    R91K

    R81K

    R1022

    R1122

    D 1

    D 2

    R747K

    Q1

    R627K

    R510K

    R3 *2.4K

    R410K C3

    0.001

    R121K

    R1527K

    R1915K R20

    81

    Q23904

    +C6

    1 uF

    D6

    M1100 uA

    R175K

    D4 1N4418

    D3C5

    1 uF+

    R1647K

    C40.1104

    S1

    KB4_ESR_01.cdd - 05-24-14

    Split Rail Supply

    100 KHz Oscillator

    Comparator / Amplifier

    Precision Rectifier

    Capacit or Shorted / Leaky Indicator

    with test leads shorted meter reads full scale (0 ohm)with test lead open meter reads 0 uA ( )

    E B C

    Q1 - 3906

    E B C

    Q2 - 3904

    R3 * 2 .7 K - 86.5 KHz 2.2 K - 96.3 KHz

    R10 & 11 matched

    TP

    NOTE: use 10K pot (R17) wit h 50 uA meter and 2.2K R3 (GNX version)