AB763 Blackface Deluxe Micro Annotated Schematic

[robrob]

[EDIT: Not AB763 Deluxe Micro, Deluxe Reverb]

I finally got around to doing a blackface annotated schematic that shows all of the component functions. I'm working on a "How the AB763 Deluxe Reverb Works" webpage. As always let me know if you have any suggestions or corrections.

The graphic may be compressed here on the forum but the original image is here:
https://robrobinette.com/images/Guitar/Deluxe_Models/AB763_Deluxe_Reverb_Annotated_Schematic.gif

 

[elpico]

Looks great Rob. I see one small typo, the 220k resistors off the grids of the 6v6 should be "grid leak" right?

 

[Mike Simpson]

Thanks !

 

[robrob]

I see one small typo, the 220k resistors off the grids of the 6v6 should be "grid leak" right?

Yep, good catch. Corrected.

 

[robrob]

Here is the annotated layout:

 

[robrob]

The How the AB763 Deluxe Reverb Works webpage is live but I can't link to it (forum rules).

I have also updated the annotated schematic in the first post.

 

[moosie]

Oh boy, these are SOOO helpful!

I've looked at your 5e3 stuff before, but the BF stuff is more where my interests lie.

Thanks for doing all this.

EDIT: I forgot, do you have plans to do later add highlighting for the paths? Signal, Power, etc... That's very useful, and impossible to find, too. If I recall you did this with some of your other diagrams, which is why I'm mentioning it.

 

[R. Stratenstein]

Outstanding, Rob, great job. Fascinating stuff. I'm beginning to think someday I might actually develop at least a little understanding of this stuff. Thanks for taking the time and sharing with us!

 

[robrob]

moosie, the webpage does have a signal path schematic. I'll do a signal path layout later.

 

[King Fan]

Great stuff, Rob. Can't thank you enough. You're making the world better one explanation at a time -- and this is *so* timely for my (related) PR build.

BTW, admins, if I'm right, it looks like Rob wants to re-title this thread. Is there a way to do that? The thread will be more useful in the future if folks don't assume it's a micro thread....

 

[robrob]

Here's the layout signal path for the Vibrato Channel:

 

[moosie]

Web page looks great! Thank you!

 

[kleydejong]

Great information, thanks Rob!