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Looper True Bypass, not so easy like it seems

Started by JackSkellington, May 25, 2018, 07:33:02 AM

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JackSkellington

Hi, I'm looking some layout of the some DIY True Bypass Looper, one loope effects.
This is the basic schematic:


I found the Keeley one's gutshot:

It' includes a pair of extra resistors. ???
I'd say those resistors are between tip and sleeve of the jacks Send & Return. Pull Down Resistors, just in case we need of them?
Confirm, please?

And then I found some kits that includes a pair of caps (looking at the size I'd say 100nF). I can't imagine the purpose. :(
https://www.dhresource.com/0x0s/f2-albu-g3-M01-3D-B0-rBVaHVWWJNKAcD4PAALdQsq2u7E062.jpg/diy-true-bypass-looper-effect-pedal-guitar.jpg
https://www.dhresource.com/0x0s/f2-albu-g2-M01-A6-C8-rBVaG1WWJQiAd1jqAAK2s6DfiCs398.jpg/diy-true-bypass-looper-effect-pedal-guitar.jpg
https://ae01.alicdn.com/kf/HTB1xhUOHVXXXXbdXXXXq6xXFXXX3/Looper-DIY-Guitar-Pedal-footswitch-true-bypass-Aluminum-Pedals-RED-Box-Foot-Pedal-Switch-handmade-kit.jpg_640x640.jpg

Help, please.

Thank you! ;)
«Just because I cannot see it doesn't mean I can't believe it»

sonnyboy27

I've built multiple true bypass loopers based on the diagram you have there and they've all worked out great. The added resistors and such on the keeley aren't necessary. You'll be fine with the plain diagram. If you have some switch pops you can go in and add those pulldown resistors if you need to but you probably won't.

JackSkellington

Thanks. :)
Actually, I already built a ABY looper, and with my DIY pedals it works fine.
I still want to know something more about those caps. I am just curious. ;)
«Just because I cannot see it doesn't mean I can't believe it»

jkokura

Quote from: JackSkellington on May 25, 2018, 08:18:05 PM
Thanks. :)
Actually, I already built a ABY looper, and with my DIY pedals it works fine.
I still want to know something more about those caps. I am just curious. ;)

Since it's just a picture, and there's no schematic or build document, it's very hard to say. If the caps are there between the input and ground, that's much different than being inline with the circuit.

In any case, they're unnecessary.

Jacob
JMK Pedals - Custom Pedal Creations
JMK PCBs *New Website*
pedal company - youtube - facebook - Used Pedals

somnif

Digging around on aliexpress's comments, apparently the caps aren't on the schematic included with purchase.

gordo

Gordy Power
How loud is too loud?  What?

JackSkellington

Yeah, cool wiring! 8)

Anyway, about those caps... It will remain a mystery? :(
«Just because I cannot see it doesn't mean I can't believe it»