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Thread: Old Crate amp pot : G40XL

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    Default Old Crate amp pot : G40XL

    Hello, this is the pot in the center labelled : 70-254-22 137/9015 ROC

    2020-01-03_05-42-31 by panixgr, on Flickr

    any one knows where to source this? or anything equivalent?

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    A Ficus ehdwuld's Avatar
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    Default Re: Old Crate amp pot : G40XL

    Thanks, I had seen that, the shipping cost is 37 EUR from Belgium to Greece. I think I may just start looking for alternatives, if any. Or just buy a new amp.
    Last edited by greekdude; 01-03-2020 at 11:22 PM.

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    Ultimate Tone Member JamesPaul's Avatar
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    Default Re: Old Crate amp pot : G40XL

    That is the usual problem when buying any single part. I try and save up repair projects so I can order enough parts that the shipping cost appears reasonable.

    It depends on space available around the pot, but an alternative is to remove the old pot from the board. Solder 3 wires to the board/pads where the old pot mounted.

    Find a cost effective place to buy the equivalent pot with slightly longer shaft threads. Then you put a lock washer on the pot. Mount the new pot in the face plate with the legs 90 degrees or 180 degrees away from the board. Put a lock washer and the old nut on the front of the face plate. You usually need the lock washers to ensure the pot does not rotate when you turn the knob.

    Then solder the other end of the wires to the pot legs. You want the wires to be as short as possible and depending on the circuit this can still induce some noise. There may also be some cosmetic differences where that knob is farther from the face plate than the others.
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    Default Re: Old Crate amp pot : G40XL

    ^^^ thanx, I'll concentrate on the shaft and find similar diameter and shape (split), then all the rest are doable as you say!

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    Ultimate Tone Member JamesPaul's Avatar
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    Default Re: Old Crate amp pot : G40XL

    Now that you know it is a 250k audio taper, if you have a local or online electronics supplier in Greece you may be able to find an equivalent that could still be soldered to the board. It might require slightly bending the legs or the shaft might be a little longer, but any 250k audio taper potentiometer that fits will work. It does not have to be that exact part.

    I am not sure why, but I was assuming those options had been exhausted.
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    Default Re: Old Crate amp pot : G40XL

    ^^^ its hard to find this shaft dimensions. Anyways of course this is doable, I'd like it to not look ugly that's all.
    Last edited by greekdude; 01-04-2020 at 04:54 AM.

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    Default Re: Old Crate amp pot : G40XL

    hey, I think this is getting closer : https://www.soundtronics.co.uk/synth...-250k-log.html

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    Default Re: Old Crate amp pot : G40XL

    Hi, ended up ordering this : https://www.ebay.co.uk/itm/Taiwan-Al...72.m2749.l2649
    I hope the shaft's diameter wont be too large for the knob.

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    Default Re: Old Crate amp pot : G40XL

    Original knob didnt fit. Had to buy one which looks close but still far from the original. Will post photos soon. Luckily the scratchy noises are now gone!

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    Default Re: Old Crate amp pot : G40XL


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    A Ficus ehdwuld's Avatar
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    Default Re: Old Crate amp pot : G40XL

    close enough
    EHD
    Just here surfing Guitar Pron
    RG2EX1 w/ SD hot-rodded pickups / RG4EXFM1 w/ Carvin S22j/b + FVN middle
    SR500 / Martin 000CE-1/Epiphone Hummingbird
    Epiphone Florentine with OEM Probuckers
    Ehdwuld branded Blue semi hollow custom with JB/Jazz
    Reptile Green Gibson Custom Studio / Aqua Dean Shire semi hollow with piezo
    Carvin Belair / Laney GC80A Acoustic Amp (a gift from Guitar Player Mag)
    GNX3000 (yea I'm a modeler)

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