Home Forums GuitarPCB Build Support 4 – Track Fuzz (solved)

Viewing 8 posts - 18 through 25 (of 25 total)
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  • #8589
    Billy
    Moderator

    Did you check your cables using other pedals

    I’m not sure I follow are you saying with your 4 track fuzz disconnected you still get a squeal

    You should get audio at pin 1 it being the output, you do sometimes need to mess around to get good contact with your probe

    Is your guitar fitted with humbuckers or high output pickups

    #8591
    Jeff
    Participant

    Not disconnected but pressing the foot switch to bypass it. The no input I mean I don’t even need something plugged into to the input jack for it to oscillate. If there is power to the pedal, it outputs a squeal (really faint in bypass and quite loud when the effect is switched on)

    I hope that helps clear up the confusion.

    The guitar is an old Teisco with single coils but I have used others.

    #8592
    Billy
    Moderator

     

    Sounds like it could be something to do with your power supply the only way to know for sure is to either get a 9v regulated and filtered power supply or use a battery with it being present at pin 3 ie audio into the op amp that tells me it’s there at the clean signal input and is then being amplified

    Check if you get it on the pcb input pad and R1 and C1 that’ll let us know if the noise is there prior to going into the effects circuit

    #8593
    Jeff
    Participant

    update

    I was able to get a 9 volt battery hooked to this and it worked perfectly without oscillating. It appears my power supplies are the problem.

    #8594
    Billy
    Moderator

    Typing at the same time Jeff!

    That’s great it’s sorted

    I always advise people not to go for the cheap option when it comes to pedal power mine are all boss filtered and regulated they cost 3 times as much but save a lot of hassle and unwanted noise

    Make yourself a few of the battery snap connectors really cheap and always handy if your power supply goes South

    Where are you located they’re cheap as chips at

    https://www.bitsbox.co.uk/index.php?main_page=product_info&cPath=225_232&products_id=2365

    #8603
    Jeff
    Participant

    I live in the US so I will have to find a place here that sells those.

    In the meantime are there any components I can add to quiet it down or is down to to a better power supply?

    #8604
    Billy
    Moderator

    With a battery you shouldn’t get any noise

    A power supply will add noise from AC ripple if it’s not filtered and will put out more voltage if it’s not regulated very few cheap ones put out 9v I’ve had them as much as 14v

    You’re much more likely to get noise with higher gain pedals I use a battery a cheap adaptor and a boss adaptor to demo my pedals just to show you can get significant noise with cheap adaptors most musicians don’t have the faintest idea how cheapo equipment can affect their set up

    There is filtering in the circuit if you look at the power section C7 check that’s got good solder joints

    #8611
    Jeff
    Participant

    I ordered some battery adapters so I will use one of those until I decide on a power supply.

    Thanks!

Viewing 8 posts - 18 through 25 (of 25 total)
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