Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Effects => Topic started by: plexi50 on July 22, 2010, 09:40:48 pm

Title: Fulltone 69 / Is This Schematic Correct?
Post by: plexi50 on July 22, 2010, 09:40:48 pm

Is This Schematic Correct?

Title: Re: Fulltone 69 / Is This Schematic Correct?
Post by: SLW on July 23, 2010, 02:15:15 pm

The circuit is correct.  To answer the question in red, no.  Those points are not grounded.
SLW

Title: Re: Fulltone 69 / Is This Schematic Correct?
Post by: plexi50 on July 23, 2010, 02:30:34 pm

Where are the points in red going to?

Title: Re: Fulltone 69 / Is This Schematic Correct?
Post by: HotBluePlates on July 24, 2010, 05:59:46 am

Well, I'm back in the US, but it will still be a couple months before I get back into my storage unit.

When I do, I have a Fulltone '69 pedal that I can open up and tell you for sure. That is, if you can wait that long...  :grin:

Title: Re: Fulltone 69 / Is This Schematic Correct?
Post by: plexi50 on July 24, 2010, 06:20:46 am

No rush. I heard the 69 was just a fuzz face with a Contour & Bias control

HBP time is all we have. Thats the one thing we cant control last time i checked

Of course i am watching the old OUTER LIMITS.

Title: Re: Fulltone 69 / Is This Schematic Correct?
Post by: HotBluePlates on July 24, 2010, 03:50:04 pm

Once I stopped and actually looked at the schematic, the arrows appear to point to unused legs on pots. So they don't go anywhere.

It also looks to me (though I could be wrong and will double-check) like the "Fuzz" and "Bias" pots have their labels swapped.

Title: Re: Fulltone 69 / Is This Schematic Correct?
Post by: SLW on July 24, 2010, 08:59:39 pm

HBP is right the unused lugs go to nothing.  They are just variable resistors this way. 

SLW

Title: Re: Fulltone 69 / Is This Schematic Correct?
Post by: plexi50 on July 28, 2010, 05:47:47 pm

Ok great. Just expanding my pedal knowledge. Thanks!