Recent Posts

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21
Building your own stompbox / My pandemic feature SOT
« Last post by aron on Today at 01:14:53 AM »
This is my Shaka through my amp.
Anyway I was featured in an interview about COVID and how it affects us musicians that play live.


https://covidpau.org/aron-i-hope-that-soon-we-can-once-again-share-the-gift-of-live-music/
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I love treble boosters, i use the runoffgroove omega which can be biased to be a treble booster and a full range
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What did he have against Duracell?
duracell doesn't have more charge than other batteries, but the voltage stays near 95% until the very last bit of charge and then drops to 0 very quickly, instead of gradually going lower and lower.
normally, you can see the led darken and the sound get more and more compressed, this warns you to replace the barrery, Duracell doesn't warn you, it will just cut out during a gig.
[yes i have had this happen to me]

cheers, Iain

Interesting! Thanks for the details:)
Then, what kind of battery should i use for this pedal?
Can you recomend one?
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Building your own stompbox / Re: 1 pot, 2 switches or vice versa?
« Last post by idy on Today at 12:37:45 AM »
What about push/pull pots that allows you to turn them on and adjust them?
Then three pots (distortion gets gain and level, booster gets level) two have switches in them.
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Building your own stompbox / Re: AB bypass looper pop
« Last post by idy on Today at 12:32:32 AM »
You check for DC like you said: with pedal powered up and engaged you use your meter on DC volts on a cable plugged in. You'll probably see at least a little...

4PDT are in my limited experience noisy, worse than 3pdt, just more work for the plunger, more to go wrong. But they allow you to do am LED. I have made A/B loopers for testing pedals and for the kind of set up you are using, but 3pdt no LED.
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The two outputs of the 3007 are tied together, so thatís an error on the schematic I posted. The trimmer seems to be functioning and altering the bias voltage, but I canít hear an audible impact. I audio probed the 3007 output while adjusting the trimmer, and at every setting itís just SO mild, it canít be right.

Iím suspecting the LFO - thoughts on how I can test that itís putting out a properly ďdeepĒ signal to the 3101? I canít get a good read of its output on my old school scope - Iím guessing I need to adjust settings to capture such a low frequency signal but Iím not sure how.

Thank you all for your input, please keep it coming!

Crooked Man - you can also try replacing C11 with a larger cap, Boss uses a 47pf.
27
Building your own stompbox / Re: DOD FX-25 filter-type mod confirmed
« Last post by PRR on Yesterday at 10:17:00 PM »
The Iabc pin (called ABI here) is a "zero impedance".

Why do you need to know?
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Building your own stompbox / Re: AB bypass looper pop
« Last post by kr2p on Yesterday at 09:31:28 PM »
Have you tested to see if any of your pedals is leaking DC on the input or output? Really the question would be if the string of pedals in the "clean" side is doing it.

No I havenít tested the pedals in the chain for DC leakage, how would I go about doing this? Is it simply a case of measuring across the tip and sleeve of the output/input patch cable using a multimeter?

You may not need all that, the caps and such. I would be suspicious of the stomp switches, the cheapies don't always perform noiselessly. It's a simple pedal, I would try to build another (if this works, you'll want two anyway) and maybe spring for a "better" stomp switch.
Iíve been thinking the route of caps/resistors might not work as I would have thought something would have made a difference. I can have a look at getting a different switch, although the pedal was actually one I bought from bright onion pedals who do really great high quality hand wired stuff that I tried modding a bit with the resistors and so on. It feels like a really solid 4pdt switch and the wire and jack sockets are all high quality so I donít think itís a cheapie.
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Building your own stompbox / Re: AB bypass looper pop
« Last post by idy on Yesterday at 08:35:03 PM »
Have you tested to see if any of your pedals is leaking DC on the input or output? Really the question would be if the string of pedals in the "clean" side is doing it.

You may not need all that, the caps and such. I would be suspicious of the stomp switches, the cheapies don't always perform noiselessly. It's a simple pedal, I would try to build another (if this works, you'll want two anyway) and maybe spring for a "better" stomp switch.
30
Building your own stompbox / AB bypass looper pop
« Last post by kr2p on Yesterday at 08:12:23 PM »
Iím having a little trouble with an AB bypass looper popping when I switch between the two loops - a clean one which has a load of pedals, and a dirty one with just a Rat thatís always on. The pop is most noticeable when I have a delay on in the clean circuit as you get all of the repetitions which is quite annoying.

Itís a completely passive AB looper and Iíve tried a bunch of things. Originally it was just a plain true bypass switcher which linked the unused send to ground and left the unused output floating. This popped. I tried the most basic thing of putting 1M pull down resistors on all sends and returns. Still popped. I then added .1uF capacitors at each send and return along with the pull down resistors, the idea being to treat the effects in the loop as one big active circuitry requiring its own input and output caps. This still popped. I also tried 1k current limiting resistors before the capacitors at the sends and after the capacitors at the returns. This still popped. For clarity the latest setup looked like the final figure in this link

https://www.mrblackpedals.com/blogs/straight-jive/6629778-what-really-causes-switch-pop

with the ďcircuit blockĒ in the diagram essentially being all of the pedals in the loop.

The pedal has an LED but the ground is separate to the audio ground, so as far as the audio path is concerned thereís no LED or power going to the pedal so this isnít the problem. And to verify this it also pops when I donít plug in the power.

Iíve tried going straight in with my guitar into the input, as well as going through a buffer and it makes no difference. Iíve tried moving it next to and away from a power supply to see if it is some sort of induced noise but thereís absolutely no difference so this isnít it either.

I feel like Iíve run out of ideas here so if anyone has thoughts that would be amazing. I should mention that I have a boss LS2 which doesnít pop as itís an active buffered circuit, but Iím trying to avoid using it as it adds a bit of hiss which seems unnecessary since a passive pedal should be able to do the same thing.
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