Help with Rangemaster clone build

Discussion in 'Burnt Fingers DIY Effects' started by 6stringcowboy, Mar 31, 2019.

  1. 6stringcowboy

    6stringcowboy Tele-Afflicted

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    Hi all,

    I chose the Aion Radian (Rangemaster clone) as my first pedal build.

    It went together well, but when I tested it, there is a constant high frequency whine in the background that I cant figure out. The boost works as expected, but the whine is hurtful.

    Any of you experts have any thoughts on where to start looking? Schematic below.

    Any assistance would be greatly appreciated.

    upload_2019-3-31_14-38-32.png
     
  2. sirbergersworth

    sirbergersworth Tele-Holic

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    What chip did you use for the 1044? I can’t remember of the top of my head but some whine and some don’t.


    Sent from my iPhone using Tapatalk
     
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  3. zippofan

    zippofan Tele-Afflicted

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    What did you use for the charge pump? I built the same board with the LT1054 and it's quieter than my BYOC build.
     
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  4. 6stringcowboy

    6stringcowboy Tele-Afflicted

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    Thanks guys!

    Microchip TC1044S

    I have a couple more I can try.
     

    Attached Files:

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  5. Armo

    Armo Tele-Holic

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    Had similar prob (different project), found the MAX1044 sorted it. Read that some of these chips oscillate at frequencies with in the audible range and some outside of it.

    Just looked at datasheet and to increase oscillation speed jumper where schematic says OSC. See build note 5. If you've done that and still noisy then change the chip.
     
    Last edited: Apr 1, 2019
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  6. 6stringcowboy

    6stringcowboy Tele-Afflicted

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    Not sure how I missed that in the build instructions but thanks for pointing it out! I installed the jumper last night and will test it this evening.
     
    Last edited: Apr 2, 2019
  7. 6stringcowboy

    6stringcowboy Tele-Afflicted

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    Update: installing the "OSC" jumper got rid of the offensive whine. Nothing but treble boost goodness now. What I really dig about the Radian is the switch that let's you choose the frequency range you are boosting; treble, midrange, or full!. Biased the transistor on the hot side of normal and I'm loving it. Does exactly what I wanted it to do!

    Thanks everyone for your help!
     
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