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Started by dogbox, February 06, 2018, 04:10:04 AM
Quote from: Katoda on February 06, 2018, 07:56:11 AMEDIT: Terribly sorry for spreading misinformation, after a thorough reading I realized I was wrong. Apparently for the sallen-key filter, the gain bandwith product should be greater than 100*fc. Did not know that. So uA741 is out, but the others are good replacements.
Quote from: Enzo on February 06, 2018, 08:44:15 AMI agree with the first part^^^^It just doesn't much matter. These are just guitar amps, not lab gear, and not even hifi sets. Guitar amps and their speakers rarely care about anything over about 5kHz. Notice guitar amps have no tweeter?When the MG10 was made, 4560 were the common op amps of choice, just as 4558 had been for a long time before them. TL072 was in general use the whole time of the other two. Note that later the 4580 became the common op amp of choice.741 op amps were indeed used in early guitar amps.Note the MG10CD and MG15CD use 4558.Put a socket there and try whatever you have, then you report if it makes a difference.