Offboard wiring without using a switch

SomeNoob · October 27, 2011, 04:27:23 AM

Quote from: deadastronaut on October 27, 2011, 04:22:35 AM
you want 2 x 4.7 uf's...the can type ones with a positive and negative for this.... not pf's...(lentils..that made me laugh.. )

Lentil is what they call them in my country

Anyway,
can type capacitor under 47uf is what i mean, i'm not sure if i can get of them. So if i have to replace these to caps with can types, should i just replace them with a 47uf?

deadastronaut · October 27, 2011, 04:34:36 AM

4 . 7 uf's........ 4 point 7...

what country?..

find an old radio or something and rip em out of that ok.....

SomeNoob · October 27, 2011, 04:36:27 AM

Quote from: deadastronaut on October 27, 2011, 04:34:36 AM
4 . 7 uf's........ 4 point 7...

what country?..

Turkey
what do you mean by 4.7uf?

old radio okay... but how much old

deadastronaut · October 27, 2011, 04:40:47 AM

read the @#$%ing parts list dude!...

http://tonepad.com/getFile.asp?id=86

SomeNoob · October 27, 2011, 04:42:38 AM

Quote from: deadastronaut on October 27, 2011, 04:40:47 AM
read the @#$%ing parts list dude!...

http://tonepad.com/getFile.asp?id=86

okay sorry

Alright then ill try to find an old radio then, ill be back here when i'm done thanks for the help!

deadastronaut · October 27, 2011, 04:45:02 AM

no problem, good luck with finding an old radio/stereo with those in...they will probably be in there ok...

SomeNoob · October 28, 2011, 08:16:33 AM

That didnt do the trick Doc,
I've replaced the two caps with can-caps, 4.7uf. Nothing comes out of the amp just a very very weak static.

Is there anything else i can do?

Main.Ace.FX · October 28, 2011, 08:27:44 AM

exactly how many parts have changed values from the original parts list....where did you get these parts from?

SomeNoob · October 28, 2011, 08:47:24 AM

For the resistors, only 1 resistors value is slightly lower (5k2 or something like that instead of 8k2)

2 capacitors, 0.01 and 0.1 are replaced with a 10 times higher cap (0.1 and 1)

Log. pots are replaced with linear ones.

And the transistors are not germanium, they are silicone.

I got these parts from a small electronics shop.

artifus · October 28, 2011, 09:07:23 AM

do you have a multimeter available? if not you could put together a continuity tester with a led, resistor and battery. check all connections and for shorts.

Main.Ace.FX · October 28, 2011, 09:10:49 AM

don't worry about the resistors, the change in value will be ok

I would try to get the capacitors closer to the correct values.... the .1uF should be ok for the .01, but replace the 1uF with another .1 (if you can use the required values, that would be best) different values will change tone, but i've found in the past that changing them too much will make the circuit inaudible.

check your transistors again....do the emitters on all three face the bottom and go to ground? make sure the collectors and bases are soldered to the correct holes also

check your grounds again...make sure everything that needs to be grounded all connects together.

you will need to do a continuity test if all of this is correct

SomeNoob · October 28, 2011, 09:39:30 AM

Quote from: artifus on October 28, 2011, 09:07:23 AM
do you have a multimeter available? if not you could put together a continuity tester with a led, resistor and battery. check all connections and for shorts.

I checked every single part with a multimeter right after i soldered them, each of them.

Quote from: Main.Ace.FX on October 28, 2011, 09:10:49 AM
don't worry about the resistors, the change in value will be ok

I would try to get the capacitors closer to the correct values.... the .1uF should be ok for the .01, but replace the 1uF with another .1 (if you can use the required values, that would be best) different values will change tone, but i've found in the past that changing them too much will make the circuit inaudible.

check your transistors again....do the emitters on all three face the bottom and go to ground? make sure the collectors and bases are soldered to the correct holes also

check your grounds again...make sure everything that needs to be grounded all connects together.

you will need to do a continuity test if all of this is correct

I'll try to find the exact values for the caps tomorrow. I'm sure about the transistors, the emitter is on the right slot.
I did the offboard wiring exactly as you told, everything that needs to be grounded is grounded now.

How do i do the continuity test?

artifus · October 28, 2011, 09:40:15 AM

but before you do any of that: take a break. get some air. go for a walk. have a coffee. chill.

when you return with a clear head have an idiot check (here i am! check!). it's often easy to overlook the 'obvious' stuff. i was debugging for hours the other day when i eventually noticed that my previously good jack to jack cable had decided to develop an intermittent fault. then look over your circuit again referencing the schematic.

*edit*

QuoteHow do i do the continuity test?

set your multimeter to continuity. it should beep at you when you touch the two probes together. attach one probe to ground. touch the other probe to all other ground points, one by one, and you should hear a beep if the connection is good. then check to see if anything beeps that shouldn't. hint: signal should not connect to ground (beep!). signal input jack tip.

SomeNoob · October 28, 2011, 09:42:47 AM

Quote from: artifus on October 28, 2011, 09:40:15 AM
but before you do any of that: take a break. get some air. go for a walk. have a coffee. chill.

when you return with a clear head have an idiot check (here i am! check!). it's often easy to overlook the 'obvious' stuff. i was debugging for hours the other day when i eventually noticed that my previously good jack to jack cable had decided to develop an intermittent fault. then look over your circuit again referencing the schematic.

Well i wish i could take a break and think about all this but... I barely have a knowledge about electronics

I just know about the basics, some parts, how they work and stuff. I dont even know how a transistor works

artifus · October 28, 2011, 09:46:44 AM

the trick is to take a break and not think about it!

deadastronaut · October 28, 2011, 10:00:46 AM

^ good advice...

Main.Ace.FX · October 28, 2011, 10:06:39 AM

yeah man, just relax!

SomeNoob · October 28, 2011, 05:37:23 PM

I am relaxed

But i dont know what the problem could be, as i said, and dont know much about electronics, for me, its pure magic

But the next thing ill do is to find the proper parts, at least the 0.1 and 0.01 caps. Hope thisll do, otherwise i'll be out of choices.

artifus · October 28, 2011, 05:42:59 PM

knowing it's magic is all you need to know.

look at the schematic. look at your circuit board. compare and contrast.

imagine yourself as an electron. you were created by the guitar and you desperately want to meet ground. but you've gotta make your way thru this circuit in order to get there. what would you do? in which direction would you flow? would you make it to the output?

LucifersTrip · October 29, 2011, 02:22:42 AM

This is a fun read and I hope SomeNoob is learning something, but I honestly don't know how this thread has gone so long while completely ignoring the debug thread
http://www.diystompboxes.com/smfforum/index.php?topic=29816.0

from the beginning, it was never about "Offboard wiring without using a switch". It was about debugging a circuit. I do not believe SomeNoob
ever stated that it actually worked

SomeNoob, since you have a multimeter, the voltage readings would be a cool starting point

good luck

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Offboard wiring without using a switch