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Messages - Background Noise

#1
Tech Help - Projects Page / Re: Slambox power issue
April 01, 2011, 08:26:44 PM
Quote from: gtr2 on April 01, 2011, 02:00:39 AM
I don't know what the transistor voltages "off hand" are on this but those are definitely not right.

FET transistors go by the terms drain, gate, source for their terminals.  Data sheets can help you with which leg is which.  Just type the part and google away.  I'll do the first one for you

http://www.fairchildsemi.com/ds/BS/BS170.pdf

Josh


Thanks much.

I may ask many questions, but I only ask them once.
#2
Tech Help - Projects Page / Re: Slambox power issue
April 01, 2011, 12:49:29 AM
Quote from: jkokura on March 31, 2011, 06:46:25 AM
I think you are misunderstanding me.

You are correct sir.  I believe I have now caught up.

I have readings on the BS170 transistor, I am a bit unsure how to report them but, the "D" pad is reading 1.43, the middle pad is reading .71 and the "S" pad in the corner of the pcb is reading 0.

Just to clarify, I took these measurements by placing the red probe on the respective pad and the black probe on the Slambox pcb ground.

I also took some photos..........






I intend on doing the audio probe procedure tomorrow, so feel free to wait for the info to post if it is necessary.  I am sure I am missing something, but hopefully this is a more complete collection of information.

I appreciate the help not just with obtaining a working pedal, but teaching me how to ask the right questions.  

#3
Tech Help - Projects Page / Re: Slambox power issue
March 31, 2011, 06:00:15 AM
Quote from: jkokura on March 31, 2011, 04:33:31 AM
Well, If we had some voltages on your transistor we'd have something that may help us help you.

Jacob

I apologize, I am new to electronics in general.

I obtained a multimeter, what this showed me is that my DC input was actual working (measuring 9.3 at the board), my battery was not (measuring .86 at the board while the battery measured 8.2).  I switched the battery terminals back to the correct places.  Now I am measuring 9.3 with DC power and and 8.2 or so with the battery.

As I said I now get no sound at all out of the pedal.  I just got done creating an audio probe and will probe it tomorrow.  I now believe that the problem is on the pcb.  This is my first pedal so who knows what I have screwed up.  

My post was a little hasty and not well though through, but I only have a few hours a day to make noise and I get a little rushed.  Turns out my children do not appreciate a Super Reverb like I do.

I appreciate your help and patience.  Next time I will try to include far more relevant data.
#4
Tech Help - Projects Page / Re: Slambox power issue
March 31, 2011, 04:06:30 AM
Thank you for your help.

I changed the battery back to its correct orientation and I am now getting consistent power to the board from both the battery and DC jack.

Unfortunately it is now back to its original condition meaning that no sound comes out at any time.

I am need to try some things before I bother you guys with anymore questions.

I am sure I will confused again soon enough.
#5
Tech Help - Projects Page / Slambox power issue
March 31, 2011, 01:52:30 AM
I wired power to the slambox according to the instructions.....

http://www.madbeanpedals.com/forum/index.php?topic=155.0

When I tested it I had a bypass signal, but the pedal signal was silent.  I was hearing a click when I matched the "wrong" terminals on the battery.  So I switched the terminals around to that the red "positive" was attached to the ring on the input jack and the black "negative" was attached to the ring on the power jack.  

Oddly enough the pedal worked, as far as the battery was concerned.  When I took the battery out and connected it to the DC power it will still give a bypass signal but the pedal  signal was silent.  It seems as long as it gets power it is working properly.

The only other issue is that the pot increases gain counter-clockwise, but I assume I just need to switch lugs one and three on the pot around.

The only deviation from the wiring scheme above is I am using a pcb for the switch and have the sleeve connected to ground on the pcb.  Also the SW hole is left vacant because the pcb had no place for it.  Admittedly I don't understand exactly what the SW does, it that my problem?

PCB is listed here http://www.guitarpcb.com/apps/webstore/products/show/1343792

Thanks for any input.
#6
Hate to be dense, but what is done with the sleeve connection on J1 which is output, correct?

Is it left open?
#7
General Questions / Re: Noob question number three.
March 19, 2011, 11:41:37 PM
Quote from: jkokura on March 19, 2011, 10:52:33 PM
Hey man, so I read through your post, and i'm not quite sure what your question is.

I get that alot.

Regardless, you answered the unspoken question well.

Thanks, I will get back when I am more coherent.
#8
General Questions / Noob question number three.
March 19, 2011, 10:37:35 PM
After destroying a Pastyface (don't ask), missing a 15 cent part on a Slambox (again don't ask), I figure I screwed up enough PCBs to go after the Yellow Shark. 

Stunningly, I had all the parts and it went, in a fashion, together.  Then I realized that I am not a Cowboy because I need the graphical representation of how the bypass and power connections work.

I understand the pots standard, post down, the "order" on pots get revered in relation to the PCB.

I have seen to much variety in the in the true bypass switch and power connections to generalize.

Is there a an equatable switch and power layout graphically represented.

I don't mind doing research so links are cool. 

Thanks much.

#9
General Questions / Re: Pastyface Capacitor question
February 26, 2011, 06:49:39 PM
Ok back to confused.

I went to Small Bear they are out of the Malory 150 at 10uF at C3.  I am willing to order from Newark who obviously has a wide selection of axial caps.  What I am not sure of is the voltage rating.  Am I correct that the pedal runs at 9 volts?  A meager rating for axial caps correct?  The Malorys are a massive 640 volt.  What voltage rating (and brand if it matters) would you recommended.

http://www.newark.com/jsp/search/browse.jsp?N=500003+1001309+5509174+209416+5491252&No=0&Ns=PRICE_PLS_001_PRICE1|0&Ntk=gensearch_001&Ntt=axial+capacitior&Ntx=mode+matchallpartial&locale=en_US&appliedparametrics=true&getResults=true&catalogId=&prevNValues=500003+1001309+5509174+209416&filtersHidden=false&appliedHidden=false&originalQueryURL=/jsp/search/browse.jsp%3FN%3D500003%2B1001309%26Ntk%3Dgensearch_001%26Ntt%3Daxial%2Bcapacitior%26Ntx%3Dmode%2Bmatchallpartial%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Den_US%26catalogId%3D%26prevNValues%3D500003%2B1001309

Second C6 is listed at 15n.  According to a conversion chart I saw this comes out to .015.  This seems to be an odd axial cap to find.  Is this what I am looking for?

http://www.newark.com/cornell-dubilier/wmf1s15k-f/capacitor-polyester-0-015uf-100v/dp/66K4996

#10
General Questions / Re: Pastyface Capacitor question
February 26, 2011, 01:13:34 AM
Thanks.

It was the only thing I was not sure about my order, lesson learned.

I will go ahead and buy the axials.  I will experiment at later date, with some experience under my belt.

I don't make it down there often, but I have family in Smyrna.  I may have the opportunity to buy you a beer.

Thanks again.
#11
General Questions / Pastyface Capacitor question
February 25, 2011, 11:44:41 PM
Newbie question number 2.

I believe I have ordered incorrect caps.

I have ceramic caps at C2 and C7, which I believe to be correct.

Clearly the box caps I order for the other values will not work.

Is this what I should have ordered?
http://www.smallbearelec.com/Categories.bok?category=Capacitors,+Mallory+150+Series+Poly+Film

I am also making a slambox and a yellow shark.  What type if cap is C1 on the slambox?  I believe the yellow shark is all box caps correct?

Thanks for the help, an active forum is better than a manual.
#12
Thanks.

I figured the 51R was something simple.

I will stride boldly forward using 33k.
#13
General Questions / Finding parts for the Yellow Shark
February 11, 2011, 05:40:13 AM
Hello.  For my fist of what promises to be a host of newbie questions.

I purchased the pcb for a Yellow Shark.  

My first problem is finding all of the resistors.

I cant seem to locate 51R or 31k6 resistors.

I bought some of the parts through PPP, but need to place an order to Small bear soon.

Thanks for the assistance.

I also could not find 31k6 resistors and bought 33k instead, will they work?.