does anyone have the diagram of the circuits fromt tha amplifier “Johnson Model standart 15″?

I’m building a pedal effect for my guitar.. Ii built a simple overdrive, but it doesn’t sound to good, but ! when I use it along with the distortion from the Amplifier it gives a beautiful metal sound.. and well want that on a pedal… so I thought “ok I’ll open the amplifier and I’ll copy the circuit”. Right now the amplifier is next to me, but it’s not that easy to copy the circuit so if any of you have the diagram of this circuit I would appreciate it a lot, Johnson Standard 15.
By way the in the amplifier I found this IC 45580 jrc 5011A and I’ve been trying to find it’s data sheet but II found nothing, so if any of you know where to find it that would be great, thanks

Chances are the data sheet you’re looking for is for a common 4558 dual op amp. JRC is not the only company that produces them. The D in 4558D designates the package type, in this case an 8 pin DIP. I’ve posted a link to it below.

Try contacting Johnson for the amp schematic.

Don


Guitar Effects Pedals the Practical Handbook  Book/CD (Softcover)


Guitar Effects Pedals the Practical Handbook Book/CD (Softcover)


$15.49


Starting with the dawn of effects building and continuing to the present day, this detailed compendium investigates effects pedals and how they can supercharge a guitarist’s sound. Experienced player Dave Hunter offers insight from the top builders and tips on how to get the most from each pedal. The author also dissects chains used by top guitarists in creating memorable recordings. The accompany…

The Stompbox Cookbook: Build Advanced Effects for Electric Guitar & Bass


The Stompbox Cookbook: Build Advanced Effects for Electric Guitar & Bass


$29.95


A comprehensive guide to electric guitar effects (“stompboxes”), with plans for 38 advanced effects, including shematics, printed circuit-board patterns, wiring layouts, and prototype photos; plus a detailed guide to cooking up entirely new stompbox effects from scratch. Illustrated with over 600 photos, diagrams, and schematics; 8.5 x 11, 259 pages….


Expression pedal for line 6 effects – add 4 more presets to your MM4, DL4, FM4, DM4


Guitar Effects Pedals the Practical Handbook  Book/CD (Softcover)


Guitar Effects Pedals the Practical Handbook Book/CD (Softcover)


$15.49


Starting with the dawn of effects building and continuing to the present day, this detailed compendium investigates effects pedals and how they can supercharge a guitarist’s sound. Experienced player Dave Hunter offers insight from the top builders and tips on how to get the most from each pedal. The author also dissects chains used by top guitarists in creating memorable recordings. The accompany…

The Stompbox Cookbook: Build Advanced Effects for Electric Guitar & Bass


The Stompbox Cookbook: Build Advanced Effects for Electric Guitar & Bass


$29.95


A comprehensive guide to electric guitar effects (“stompboxes”), with plans for 38 advanced effects, including shematics, printed circuit-board patterns, wiring layouts, and prototype photos; plus a detailed guide to cooking up entirely new stompbox effects from scratch. Illustrated with over 600 photos, diagrams, and schematics; 8.5 x 11, 259 pages….


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