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i've made few Chunk Systems pedals:





pcb layout:



i also built their Agent 00Funk:

nevermind!

this is a really strange one for me. i've built more than 500 different pedals now, and many fuzz faces (both PNP germanium & NPN silicon) that have all sounded great, and for some stupid reason i can't get my hipster's bias down to 4.5V. i socketed the two transistors and have tried a ton of different ones. all of my transistors were checked with my peak atlas DCA55 to be at spec and the 25K trimpot still only adjust from 9V down to 8.98V on all of them.

anybody have any idea as to why this is happening? i even went to the trouble of removing all of the parts and replaced them with measured tested & ones to make sure that i didn't have a faulty component, but i can't figure this out for the life of me.

I just finished this one the other day which is a Southampton fifth gear which as far as I can tell is the same as the earthquaker devices speaker cranker, the only difference on mine is that I used two germanium diodes instead of the silicon 1N60A's in the clipping section.

This stuff looks great!  If you ever did Ferric Acid etching on aluminum, can you tell me if this acid acts similar?

I've used ferric acid on aluminum, but acid magic is much, much better and faster.

Killer response.  I think I need to get some sort of powered sander to get the imperfections out.  Right now everything is done by hand.

Also, what's acid magic?  I just ran out of my bottle of ferric acid and am interested to try something that doesn't stain everything in my basement.

http://www.spadepot.com/Acid-Magic---Muriatic-Acid-Replacement-P662C634.aspx?zmam=55673001&zmas=1&zmac=1&zmap=CA1062&gclid=COehrPe0kc4CFQiSfgodma4CZw

That's a killer etch. Did you etch the polished enclosure or polish it after the etch?  I've been wanting to do something this clean for a while.

thanks. first I sand the enclosure with a Makita orbital sander (150, 220 and 320 grits), then I block the face with 400 grit wet. then I etch it with acid magic, then I block wet sand the face with 600, 800, 2000 and finally with 12000 micro mesh. the block sanded 12K paper results with a polished finish.

I just finished this one the other day. after owning the original, this one sounds just like it but is a LOT smaller in an etched 125B:

Looks great, inside and out.  What kind of 220uf electrolytics did you use?
They look nice and compact.

Panasonics from Mouser.

I have, but it still does something special for me every time 

okay then. just for you  :

what? you've never seen a Sharkfin PCB before?

just finished this one. I added a clean blend and an adjustable (via internal trimpot) booster to the output so it would have unity gain. etched 1590BB with a relayed true bypass and clear knob with a status led.

I made a small daughterboard to make an an AD633AR match an AD633AN's pinout, but it didn't work. either I fried the chip when I tried it before the daughterboard or the one that I got from eBay's pins didn't even match an AR's pinout. i'l have a real AN from Mouser on Monday so hopefully all of the other chips have survived.

I had the same problem too. i'm ordering an AD633AN from mouser now. thanks for clarifying!

I used amphenol enclosed jacks.