Rockman Ultimatum Pedal (Circuit Trace) [Moved]

A collection of original layouts for vintage guitar effects. If you want to build real replica's of vintage pedals, this is the forum you want to look at.
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Cybercow
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Post by Cybercow »

This was originally placed here when it actually belongs in the "Boutique Stompboxes dissected..." section. This is NOT n original circuit :oops:

It has been moved to here: viewtopic.php?t=32200
Last edited by Cybercow on 20 Sep 2022, 00:39, edited 3 times in total.
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bmxguitarsbmx
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Post by bmxguitarsbmx »

really cool! Never even heard of this pedal.

The C19/R44 combo seems off. Can you verify the value of C19 is actually 8.2nF? 8.2nF and 1.2k would make U1a a unity gain buffer for most of the audio range...
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Cybercow
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Post by Cybercow »

bmxguitarsbmx wrote: ↑16 Sep 2022, 18:15 really cool! Never even heard of this pedal.

The C19/R44 combo seems off. Can you verify the value of C19 is actually 8.2nF? 8.2nF and 1.2k would make U1a a unity gain buffer for most of the audio range...
Yes, it is correct. Every component in the original pedal was and-measured. Confirmed by comparing the trace also done by Robert (@PedalPCB).
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