Just fixed my Ibanez TS-808 pedal.

[Simon Barden]

They normally come up quickly on the images section of a Google search, but I've had no luck so far. However this particular rage of pedals were only made for a couple of years around 82/83, so they are relatively rare and the schematics may never have been made available. I bought an Octaver pedal at the time, it was far better than the Boss one). But I expect they failed to compete with Boss, or their corporate philosophy changed and decided they weren't going to do guitar FX any more, so stopped making them.

But thanks for the offer Dave, and I'll have a look through the sites when you get the links up.

[dave.king1]

Sorry I'm late back to the party with this, we are minding grandchild No.8 today and I've been on poppy duty

I can't remember who referred me to these, I was looking for an old Electronics Today magizine circuit for a guitar box called an attack delay unit. No one could help with that but included in these links is the Boss Slow Gear ( Boss SG-1 ) which is/was the same thing it fades onto the note so you can get a nice violin effect and the one I built back around 1970 gave a beautiful creamy overdrive on bypass so I probably stuffed something in the build.

Here's a bunch of schematics and kits
http://www.generalguitargadgets.com/...lp/schematics/

And another site with just kits and stuff
https://www.pedalempire.com.au/collections/byoc-pedals

[dave.king1]

A quick google found this

https://www.google.com.au/search?q=p...w=1440&bih=791

And then this

http://s853.photobucket.com/user/ber...Audio.jpg.html

[DrNomis_44]

Cheers for the schematics links dave.king1, those will definitely be useful, I seem to remember that ETI Attack/Release circuit, well it does sound familiar to me anyway.

[dave.king1]

The circuit diagram link I posted up doesn't include the tone stage, but it is there I'll post the link later

[DrNomis_44]

The circuit diagram link I posted up doesn't include the tone stage, but it is there I'll post the link later

Cheers mate.

[dave.king1]

Power cct
http://s853.photobucket.com/user/ber...Power.jpg.html

Pretty sure this is the tone stage
http://i853.photobucket.com/albums/a...PH44-Phase.jpg

Probably easier to go here and pick the bones out of it
https://www.google.com.au/search?q=p...ih=791#imgrc=_

[Simon Barden]

Fortunately Dave, my PH-44 works well. Unfortunately it's the CE-22 Chorus and the AD-33 delay that I need the diagrams for and which I couldn't find. I can find something for the Pearl single pedal delay, but not the dual one. Couldn't see anything in those links you put up either.

[DrNomis_44]

Fortunately Dave, my PH-44 works well. Unfortunately it's the CE-22 Chorus and the AD-33 delay that I need the diagrams for and which I couldn't find. I can find something for the Pearl single pedal delay, but not the dual one. Couldn't see anything in those links you put up either.

It may be that you might be able to use the schematic for the single delay to service the dual delay pedal, often you'll find that manufacturers will cut manufacturing costs by just using existing circuits and doing minor mods on them to create new pedal designs, there should be enough similarities between the single and dual delay to enable you to get some idea where the cause of the non-functioning pedal may be, that's something you could try if you can't find a schematic anywhere.

[Simon Barden]

Possibly, though the higher supply voltage (18V vs 9V) means that the power regulation chips will certainly be different and power rails will probably be higher voltages to increase the headroom (maybe converted to +9V, 0V and -9V rails).