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I love the 5e3. Just not mine! Please help.

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  • JohnRose81
    replied
    Put the speaker in. Now it reads 155.

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  • g1
    replied
    Try it. Meter set to ohms, one probe at each end of the cap. (the cap that goes to pin3 of the 12AX7)

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  • JohnRose81
    replied
    When I touched pin 3 I got 0. I didn't try each end of the cap.

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  • g1
    replied
    Do you mean you measure 0 ohms across that cap (one probe at each end of cap)?

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  • JohnRose81
    replied
    On the 12ax7, I read zero. I set the multimeter to the ohm logo and put the black to the chassis and the red on pin 3. Read zero. I put it on the cap that the white wire goes to and it tired zero. The resistor that is attached to that cap is verified. It works.

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  • g1
    replied
    What resistance do you measure with one probe on pin3 and one probe to chassis?

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  • JohnRose81
    replied
    The back of the board is wired correctly.

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  • JohnRose81
    replied
    Pins one and three look good, so do their solders and resistors. Pin 4 and 5 is hooked up right. Slightly sloppy but no concern. The back of the board may be flawed. Easy to get turned around with it being mirrored from the schematic. I'll check now.

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  • loudthud
    replied
    Originally posted by g-one View Post
    Yes, pin1 of 12AX7 is high, pin3 is low. Check there are good connections from pin1 to the 100K, from pin3 to the 1.5K, and from the 1.5K to ground. Also check that the resistor measures 1.5K.
    Also check the connection to pin 4. (Pin 4 should be connected to pin 5). The voltage on pin 1 shouldn't be higher than on the filter cap F3 so that doesn't make any sense unless there is some bizaar mis-wire on the back of the board.

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  • Chuck H
    replied
    Have we re flowed all the connections yet?

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  • g1
    replied
    Yes, pin1 of 12AX7 is high, pin3 is low. Check there are good connections from pin1 to the 100K, from pin3 to the 1.5K, and from the 1.5K to ground. Also check that the resistor measures 1.5K.

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  • JohnRose81
    replied
    I'm Seeing the #1 post for the 12AX7 is really high. The rest look normal.

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  • JohnRose81
    replied
    Starting on far right for tubes

    12AY7

    1. 142
    2. 0
    3. 2.3
    4. 0
    5. 0
    6. 141
    7. 0
    8. 2.4
    9. 0


    12AX7

    1. 298
    2. 0
    3. .6
    4. 0
    5. 0
    6. 240
    7. 18
    8. 51
    9. 0


    6V6

    1. X
    2. 0
    3. 422
    4. 382
    5. 21
    6. 22mv
    7. 0
    8. 23


    6V6
    1. X
    2. 0
    3. 417
    4. 382
    5. 184mv
    6. 184mv
    7. 0
    8. 2.3


    5Y3

    1. X
    2. 428
    3. X
    4. 0
    5. X
    6. 0
    7. X
    8. 428


    FILTER CAPS STARTING WITH ONE CLOSEST TO POWER SUPPPLY

    F1 - 428
    F2 - 380
    F3 - 280

    FUSE HOLDER - 70V for some reason. Will check socket, again.

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  • g1
    replied
    Measure and post tube voltages like you did in post #39.

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  • JohnRose81
    replied
    Found I had a cold Solder on one of the posts for the fuse holder. Fixed now. VERY quiet guitar through the speaker (Success) and very very distorted. Input?

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