BLACK FOREST High Gain Preamp - Based on the Bogner Uberschall

[haveyouseenhim]

I'm sad to report that my build is "beyond repair". I've found that the source of my problem is me being an idiot and painting the board with high heat paint. A word to the wise... BBQ paint contains conductive fibers. My entire board is conductive at this point, measures .4v, and if you touch it anywhere it squeals. Sigh.... back to the drawing board.

Sorry to hear that. Had a good laugh at your expense though     
I just used testors lacquer on my x2

[pakrat]

Lesson learned Mike. I don't mind if you laughed, but I do feel kinda stupid  I'll have a new board etched tomorrow no big deal. Removing the components from the old board should be fun......

[pakrat]

@JOK3RX I'm looking at the Rev4 layout and it looks like the pad for the jumper that connects to R19 is touching the pad for D4. It is not on the older layouts.... is this a mistake?

[pakrat]

It's really strange that the board doesn't have continuity to itself, and the ground rail shows 0v. If I measure anywhere the top of the board itself it shows .4v, but if I measure a components ground leg, it shows 0v.

[haveyouseenhim]

Lesson learned Mike. I don't mind if you laughed, but I do feel kinda stupid  I'll have a new board etched tomorrow no big deal. Removing the components from the old board should be fun......

It could just as easily happened to me because I painted my board without checking if it was conductive. It never even crossed my mind..    You say you feel stupid, look at it this way, you're that much smarter now.

[pakrat]

This is true. Not all high heat paints are conductive though, and I'm glad that's true since my Turkey day entry has a painted board and is already populated..... no problems.

[J0K3RX]

It's really strange that the board doesn't have continuity to itself, and the ground rail shows 0v. If I measure anywhere the top of the board itself it shows .4v, but if I measure a components ground leg, it shows 0v.

Yup, I think you found a mistake... I owe you a beer!  

You guys know about this guy right? He has different color boards, bits etc... Ships real fast here is the US. He will send you a business card with your order so you don't have to go through ebay and he will give you a little discount if you order direct. No more painting boards... Unless you like painting them that is..
http://stores.ebay.com/PCB-Laminates-Copper-Clad

[fretzburner]

JOK3RX after hearing your dragon attack clip,i think i'm heading for another soldering battle again.
Thanks

[pakrat]

Thank you Jim, he's on vacation so I'll order them when he gets back. I had also built the tonepad mxr gate and painted that board as well.... it works but has a serious hum, no wonder 

[J0K3RX]

Thank you Jim, he's on vacation so I'll order them when he gets back. I had also built the tonepad mxr gate and painted that board as well.... it works but has a serious hum, no wonder  

Remove your parts and use this to clean your boards...Actually you can probably leave all the parts in..?

http://www.homedepot.com/buy/klean-strip-green-1-gal-odorless-mineral-spirits-gkgo75000.html#.UJ--R-TNbQQ

[pakrat]

I was thinking it would be easier to keep track of the parts if I just etch new boards and transfer part by part. If I take all of the parts off, I was thinking I would just sand the paint off. I think I'll go with new boards though because the pcb will take a beating with all of the desoldering. Plus this way I'll use the new Rev4 board. Can you do me a favor and fix the error in the pcb layout? 

[pakrat]

By the way, you are correct that removing the presence pot and associated cap & resistor totally fixes the tonestack. Maybe you could remove it from the layout to avoid confusion and it would make the board a bit smaller. If you have moved on to better things (ENGL... drool) you could send me the DIYLC files and I'll do it if you want.

[darron]

Where do you get that dark brown PCB you used in the top view mock? I've really been looking for some!

[J0K3RX]

Where do you get that dark brown PCB you used in the top view mock? I've really been looking for some!

7 posts down from the top there is a link.  

Here it is again anyway... And it's black by the way.
http://www.ebay.com/itm/24-shts-Copper-Clad-Laminate-030-4-x-6-SS-BLACK-/160919708838?pt=LH_DefaultDomain_0&hash=item25778fe4a6

[J0K3RX]

By the way, you are correct that removing the presence pot and associated cap & resistor totally fixes the tonestack. Maybe you could remove it from the layout to avoid confusion and it would make the board a bit smaller. If you have moved on to better things (ENGL... drool) you could send me the DIYLC files and I'll do it if you want.

Ok, here ya go... Bout as tight as I can get it!




Here is the giant image so you can see it better 
http://dl.dropbox.com/u/11178619/Noise%20Gate/No%20Presence%20-%20Smaller%20Footprint.png

Here is the transfer it prints to scale!
http://dl.dropbox.com/u/11178619/Noise%20Gate/smaller%20BF.pdf

[pakrat]

Thanks a lot Jim, I will be rebuilding ASAP!

[haveyouseenhim]

Me too. I'm etching atm

[pakrat]

Mike, we're like two vultures waiting to pounce!

[haveyouseenhim]

Mike, we're like two vultures waiting to pounce!

Yep. I just want to be able to achieve the tone from Jim's sound clips. So heavy and beastly. So far mine doesn't have good enough bass.

[pakrat]

Did you substitute any component values?