Any electronics experts?
Full Name:
Highnote
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I'm building my first diy guitar buffer. Having trouble troubleshooting a high pitched noise. It only occurs when I use a 9v dc power jack. If I hook up a battery it works perfectly. I've tried 3 different power supplies and replaced the dc barrel jack. Any electronics wizmos out there?
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Top of Page Bottom of Page PermalinkFull Name: fishcane
How are your grounds
How are your grounds
Top of Page Bottom of Page PermalinkFull Name: GoneGoodbye
The supply your using
The supply your using probably isn't filtered very well, if it has a lot of ripple on it it will bleed into the electronics. Even a good supply still isn't straight DC, it usually has some ripple on it but not enough to cause problems.
Huge filter capacitor on the supply should help if that's the issue,
Top of Page Bottom of Page PermalinkFull Name: jonaspond
Is there anything else in the
Is there anything else in the chain or is it direct guitar>buffer>amp?
Top of Page Bottom of Page PermalinkFull Name: Sycamore Slough
My first thought is RF
My first thought is RF interference picked up by the Wire between Wall-Wart and DC jack. I'm no electronic expert, but some Guitar effects just sound better with 9V battery compared to external DC supply.
Also I've noticed that many effects sound fine with "Genuine Boss PSA" but not so great with one-spot or other generic power supply adaptors.
Top of Page Bottom of Page PermalinkFull Name: Highnote
I've tried isolating it but
I've tried isolating it but no difference. Battery works in all settings, power supplies work but there's a high pitched background noise.
Here's what I'm working with.
Top of Page Bottom of Page PermalinkFull Name: jonaspond
Is it a singular battery
Is it a singular battery supply cable to the buffer that is directly plugged into wall?
Top of Page Bottom of Page PermalinkFull Name: Sycamore Slough
Not a lot of details on
Not a lot of details on buffer circuit but possibly some insight on how Tiger is/was wired up.
Top of Page Bottom of Page PermalinkFull Name: Highnote
Single psu is the goal. Tried
Single psu is the goal. Tried two different psu's and isolated pedal board supply. Same results.
Top of Page Bottom of Page PermalinkFull Name: Highnote
This is a little different
This is a little different than most buffers. It is going to load the pickup with a variable impedance pot.