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Messages - dorrisant

#1
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 24, 2014, 05:37:50 PM
Thanks again guys!

I really hate it when posters have an issue , get great advice and then never post what the answer to the problem was. That is a waste of cyberspace. I have been guilty of it from time to time. If anyone is searching for those voltages they can find them quick enough now. So now we can have closure.  :)

Tony
#2
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 23, 2014, 03:39:49 AM
Ok... Voltages as promised:
1- 5.78
2- 2.77
3- 2.78
4- 2.78
5- 2.78
6- 5.78
7- 0
8- 0
9- 0
10- 5.78
11- 0
12- 5.78
13- 0
14- 0
15- 5.78
16- 0

#3
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 19, 2014, 10:11:49 PM
Quote from: selfdestroyer on September 19, 2014, 10:06:14 PM
Nice man.. glad you got it going. Its a rocking pedal for sure. I recently built one for my aunt and she loves it.

Cody

I only got to play it for about five minutes... I have to get back to the bench (translated=money). Sounded REALLY good! Can't wait to get some free time with it.

Thanks again for the encouragement and knowledge!!

Tony
#4
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 19, 2014, 08:17:28 PM
Quote from: mgwhit on September 19, 2014, 08:14:14 PM
Quote from: mgwhit on September 17, 2014, 03:32:35 PM
If you've got another 4049UBE laying around, feel free to try it, but on an etched board a bad component is the last thing I would suspect.

Well, I eat my words.  Congratulations!

No worries... You were doing what you could to help and I appreciate that.

Besides, when have you ever seen four chips in a row fail?

Tony
#5
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 19, 2014, 07:56:03 PM
It was a set of four bad chips... I got new ones from a local store. Popped the first one in and saw big pretty signal at the output jack. ;D

I had to plug it in and try it out... 8) I will open it later and post the voltages.

Thanks to all for taking a look and helping... MUCH APPRECIATED!!!

Tony
#6
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 19, 2014, 03:47:54 AM
Using a One-Spot , the only pedal loading it... 9.54v.

No continuity between pin 4 and ground.

Three out of four of the chips I have show 1.4v on pin one... >:(

Just for S&Gs I replaced R7 with a 1W MF... I have changed and confirmed values on all of the onboard parts at least three times... Oh, I'm not giving up.

One of the chips showed 6.7v or so... None of them show any voltage on pin 4 at all.

Hmm... Thanks to all for the comments, you are all helping me preserve some sanity. I definitely need that right now.  :-[

Tony
#7
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 18, 2014, 10:28:17 PM
If I lift the ground side of C5 I get signal through it. Using my Behringer CT100 I get .135vac at the input and .115vac at the ground side of C5 with the  gain maxed. I have now tried 4 different chips and find it hard to believe that all are bad. I have rechecked all the values of components.

I have built hundreds of pedals... Many are way more complicated than this.

I am at the point where throwing the whole thing at a wall and watching it explode is starting to sound like the only way to achieve any satisfaction from this project.

At my wits end...

Tony
#8
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 18, 2014, 08:13:26 PM
Quote from: mgwhit on September 18, 2014, 01:33:15 AM
There are a couple of dodgy joints on pin 7 and R3, but I doubt those would cause your problem.  Check for continuity between pin 8 and the positive leg of C5.  There's some detritus on the board there, and a short to ground in that location would totally explain your problem.

No short there... Meter shows 20 megs and climbing.

Voltages:
1- 6.67
2- 2.99
3- 2.91
4- 0
5- 6.11
6- 6.88
7- 0
8- 0
9- 0
10- 6.68
11- 0
12- 6.88
13- 0
14- 0
15- 6.68
16- 0

Reflowed all joints and  pulled the chip and socketed it. Tried two more with the same results.

Tony
#9
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 17, 2014, 11:05:58 PM
The other end. I put a light behind to shine through the board.
#10
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 17, 2014, 11:04:44 PM
I cut the ends of the board off... Had to fit it in the box.
#11
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 17, 2014, 11:03:00 PM
I cut these pics down to half size... Still pretty big.
#12
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 17, 2014, 10:59:57 PM
Ok... Here some pics of my build.

I did install the boost switch with 100k/10M resistors.

The in/out jacks function correctly, it passes signal just fine when it is in bypass. The #2 and #3 terminals of the gain pot are tied at the pot (no need for that wire).

Tony
#13
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 17, 2014, 04:23:01 PM
Thanks !

I will post some pics when I get back to the bench later today.

Tony
#14
Tech Help - Projects Page / Re: Snarkdoodle problem...
September 17, 2014, 02:54:41 PM
I guess I should post some pictures...

Can anyone post the chip voltages?

Tony
#15
Tech Help - Projects Page / Snarkdoodle problem...
September 17, 2014, 02:15:23 AM
I built the Snarkdoodle 2012 Edition.

I can trace signal to the input side of the CD4049 pin 5, also C4 and R5. No signal on pin 4. I have pulled C4 and R5 and confirmed their values as well as C5. I did make my own pcb from the document... All traces look fine , no crossed traces etc..  Does this sound like a bad chip?

Thanks in advance for any help...
Tony