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Frankenleslie 122 motor issue

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  • Th'Rift
    replied
    Thank you David! Gonna need a little adjustment for horn speed, but otherwise it is working. The thunderstorms have ceased, everything is rotating, and I have finally experienced the genuine vintage hammond leslie sound. Truly inspiring, I'll be sure to show it off once it's settled in its home.

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  • Th'Rift
    replied
    Oh my God there's not though, ever do something stupid when you totally know better?

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  • David Anderson
    replied
    To repeat my earlier question, is there a shorting plug in the brake socket on the top side of the amp chassis? The yellow wire you mentioned connects to this socket, and a shorting plug completes the connection to the Slow motor outlets.

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  • Th'Rift
    replied
    Motors connected properly. The switch was backwards in its housing as well. The relay reed is moving from one contact to the other on switching. I found another relay on hand on case I have to replace this one, but it seems to be functioning mechanically at least. Connections look good. That yellow wire doesn't seem to be bothering anybody, I moved it aside just in case.

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  • David Anderson
    commented on 's reply
    The small motor is the Slow motor. When power is applied, the Slow motors engage the drive wheels on the shaft that goes all the way through the Fast motor; then, when power to the Slow motors is turned off, their shafts disengage the drive wheels. At the same time, power is applied to the larger Fast motors.

    There are pictures of all this stuff in the service manuals, which can be downloaded.

  • Th'Rift
    commented on 's reply
    To clarify, which is the slow motor which is the fast? I've had it connected both ways throughout my experiments, but in the end which one is which?

    I certainly can test the circuit with a volt meter, once I've safely identified what im working with and study the schematic, I'm not an electrical student, electrician, or licensed repair person. Broke rock organist here, with nobody to hire to fix this even if I could afford it.

  • David Anderson
    replied
    For one thing, the white power cord is supposed to be on the Slow motor, and the brown power cord is supposed to be on the Fast motor, so that explains the reversal.

    Is there a shorting plug in the brake socket on the top of the amp chassis? That could interrupt power to the Slow motor sockets.

    Is it not possible for you to determine where power is being interrupted? With apologies, that is very basic electronics.

    More generally, a Leslie amp from this era probably doesn't need complete recapping. Maybe the Black Cats right at the inputs could be replaced, but the orange ones are pretty reliable. Even the filter cans from that era are unusually long-lasting, certainly better than the current replacement cans.

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  • tpappano
    replied
    That yellow wire that passes over the top of the relay, make sure it’s not touching the relay armature and interfering with its free movement. I would dress It to the side.

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  • Th'Rift
    replied
    How I connected the browns and whites

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  • Th'Rift
    replied
    A few of the underside of the amplifier

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  • Th'Rift
    replied
    Here's a video of what happens switching from chorale to trem with a view of the back and a lick.

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  • David Anderson
    replied
    The relay contacts do sometimes get damaged or the reed can get bent so that one side doesn't make good contact. The reed is simply the arm of the relay that moves.

    Sometimes Leslie switches can end up wired backwards. 147 switch logic is opposite 122 logic.

    It doesn't matter what it says on the switch housing. For 122/6H switching, it's closed for Fast, open for Slow.

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  • Th'Rift
    commented on 's reply
    Pictures are coming today, it rained a bunch yesterday so I didn't go out at it.

  • Th'Rift
    replied
    When the lamp is in the fast sockets, the switch turns it on and off, but chorale is on, and trem is off. Doesnt come on at all when it's in the slow sockets. I'm hearing a distinct click when the switch is flipped, but im seeing no motion in the underside of the amp. Where should I look for this reed? Switching relays are what I'll be learning about through this adventure, I've never really had to work on one before.

    Also, I've got the caps and tube kits ordered for the Leslie amp.

    And thanks again David, I do really appreciate your insight.

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  • David Anderson
    commented on 's reply
    You didn't answer the first question: Does the relay's reed move when you toggle the speed switch? As I wrote, the default "normally closed" position of the relay is to supply power to the Fast motor outlet.

    Does the lamp toggle on and off with the speed switch?
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