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Using a scope to setup a delay pedal?

Started by gutsofgold, May 16, 2009, 05:05:37 PM

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gutsofgold

May 16, 2009, 05:05:37 PM
I got my hands on an oscilloscope and would like to attempt to setup an old Memory Man delay pedal correctly. Could anyone offer some guidance? I don't even know where to begin  :icon_redface:

JKowalski

#1
May 16, 2009, 10:29:03 PM
"Setup"? Do you mean fix from a non-working condition?

gutsofgold

#2
May 17, 2009, 03:17:21 PM
Yeah, it has a few issues dealing with the BBD chips. I'd imagine it just needs to be "setup" as if I just built it.

Thomeeque

#3
May 17, 2009, 04:46:27 PM
Quote from: gutsofgold on May 17, 2009, 03:17:21 PM
Yeah, it has a few issues dealing with the BBD chips. I'd imagine it just needs to be "setup" as if I just built it.

You can check the clock signals by a scope and you can use scope to set BBD DC bias properly (put signal from generator at input and set bias for maximal unclipped signal at the output - you can find some factory setup instructions e.g. at nelson's page or in BBD datasheet)..

T.
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devnulljp

#4
July 04, 2009, 05:44:10 PM
Quote from: Thomeeque on May 17, 2009, 04:46:27 PMYou can check the clock signals by a scope and you can use scope to set BBD DC bias properly (put signal from generator at input and set bias for maximal unclipped signal at the output - you can find some factory setup instructions e.g. at nelson's page or in BBD datasheet)..

T.
I have the same question as the OP ... so how do you do that? What are you looking for? I have an old Tokai MN3205-based analog delay that has a lot of clock noise and I'd like to try to get it in spec but don't know where to begin.
What do you do -- throw a sine wave through it into an oscilloscope, then what do you look for?
Thanks   
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