Breadboarding is pretty notorious for having open circuits. My way of troubleshooting audio breadboard circuits is to have it plugged in, run a wire between the input and output; you should hear your clean signal, then from the input go to the next point in the audio chain: you should be able to hear your signal in some form or another. Keep following it until you find where it's not getting through and investigate why.

I've never yet made a breadboard circuit that was hassle free, and have even restarted them before after finding I just couldn't fix it. Good luck!
Bought one from an op shop for $130, was a super cheap Chinese strat rip off.... I put a new nut in it, aluminium foiled the inside for shielding, rewired it to how a Strat normally is (tone knobs were in a different config) and then proceeded to rock out and have heaps of fun with it while doing massively inappropriate dive bombs on a no name classic tremolo - didn't snap it

In the end, I sold it for $160 in a shop, so after commission I got back the same amount I bought it for. Definitely well worth it for the fun of modding and playing it!
Solved my problem from the previous page, I bought some 2SK30ATMs and it completely fixed it Maybe as my SD-1 is fairly new, the MPF102s weren't quite the right transistor. Who knows. (Someone will I guess)

Next mod is to add a switch to swap one clipping diode with a different one, and another switch to take a diode out of the circuit for softer symmetrical clipping. May end up not doing either, will see how I like the sound after experimenting!

EDIT: put in a switch for symmetrical/asymmetrical clipping, didn't add any diodes in the end. Here's a pic showing the three mods done to the circuit board. Thanks all.

They just haven't yet heard the music that is right for them.

I wasn't into music so much until I heard the stuff that sounds amazing to me
Yep, three different datasheets tell me that the transistor is in the correct way... and the pedal wouldn't work if it was wrong, I'm guessing.
Hey guys, long time no see! I'm currently modding my SD-1 with the bleed fix, stacked op amp and a switch to change one of the diodes. The last two will be simple enough, it's the bleed fix that's causing me trouble!

I'm using this particular fix, but decided to use MPF102s MOSFETs as they were easiest for me to get, and someone posted that they worked. I've done things as per the the threadstarter's instructions - have even mounted the FET and C2 on a bit of vero in the holes for C2 - just with the different FET. In the third post, someone says that they add an extra diode, but that doesn't seem to be included in the original method, so I left out the diode.

So... can anyone help at all? It'd be greatly appreciated! I'll post pics of the end result when the whole thing is done!

Hmm... power light is on.... So could be an issue anywhere in the signal chain inside the amp. You could maybe find it yourself if you're confident with electronic troubleshooting, if not, well... if you don't have a friend that's good with circuits, and you really want the amp fixed, take it to a tech. Or maybe try and get an opinion free of charge from an expert to see what the problem could be and if it's worth fixing! Hope it goes well!
Hmm, after looking up some photos of it, it seems it doesn't have a fuse you can change from the outside. Can't find a schematic, so can't say if it's meant to have one internally or not. It should though, but if it doesn't, well then something could have been damaged...

Actually, I'm assuming that the power light is off, or is the unit still on but you're not getting sound?

And is there a chance that maybe a wire in your guitar has come off, if the answer to the last question is that the light is on. Just trying to work out all the possibilities here!
A great place to start would be "The Ultimate Pedal Building Thread" found here:

You can google schematics for different pedals, but there's some sites listed there which have schematics. You would also probably get better help there, from all the experts!

Quote by the_perdestrian
this is what im trying to do.

a lot of guitarists have just a single volume knob. what I am trying to build is a pedal that is just a tone knob. input jack, pot, input jack. no switches or anything. what I wanna know is this. is it possible?

right now the knob effects the volume and all the high end is sucked out. im kinda new to how everything works on a mechanical level and im trying to figure this one out on my own, but before I move on I just want to make sure if its even do-able.

Just making sure this is right: You're building a tone knob into a pedal, as your guitar doesn't have one?

If that's what you want to do, the difference between tone controls and volume controls is that the tone pots have a capacitor connected, meaning that as the resistance of the pot is changed, different frequencies are cut/allowed to pass. I'm not sure if it would cause any impedance issues having this in your signal chain between the guitar and amp though.

You can look up some guitar tone schematics, or there's some slightly more advanced tone controls for pedals out there too you could try.
There's a few small luthiers about the place if you do a google search, but due to distance you might have to do a phone or email interview.

The two big Australian guitar manufacturers are Maton and Cole Clark if you want to talk to them about guitars. They're mostly acoustic, but do do some electrics. Good luck!
I use the credit card method, you slide a credit, debit, whatever kind of solid plastic card under it to lever it up. Once it starts to come up on one side, lever it on the other. Would recommend NOT using a screwdriver, I've damaged a knob trying that before!
Long hair does not a metalhead make.

You want to make a metal first impression? Wear a band shirt, it's what the vast majority of people do.

A lot of metallers look a lot more metal with bald heads anyhow.

I've had long hair before, and have to say, while you think it's really cool at the time, when you look at photos years later it's always like "Why oh why, I look like a girl". Maybe not for everyone, but for a lot of people. Well, me anyhow haha. Short hair is a lot easier!
You're going to have to go into a shop, try one out, and crank it!

Otherwise, it has a line out, so you could put it through a PA, which is the better option at a lot of gigs.

I have a normal Night Train, the 15W one, which is definitely fine for small gigs. Pedalwise, I've only ever had an overdrive pedal, which sounds great, but not sure about others (and I'm assuming here that the lil' Night Train would handle pedals the same way).

The head is 2W though. I remember trying a 5W amp and thinking it wasn't quite loud enough, but as I said, try it out, you may be surprised! But PAing it may be the way to go.

Or you could get the original Night Train, which doesn't have a line out, but has the volume!

You'll be able to find a schematic for the guitar on the internet, and that should clear up what goes where. If you can't find a schematic for the exact brand and model of your guitar, the Seymour Duncan pickup site has wiring diagrams for pretty much every pickup and control pot combination there is!

You could even try putting strings on the guitar and playing it while touching the wire to different places, but maybe not the best method...

Also, with the size of your pots, you mean the resistance size yeah? I think they tend to be the same size, though some might be audio log pots, and the others standard. I can never remember which is used most often for what task in guitars.
Why do you need to replace everything? And how can the wire keep falling off inside the guitar!? If it's soldered good, it should pretty much never come off (I've only had this happen once, on a badly soldered jack).
Thanks, trueamerican!

FoolOnThePlanet, I was after total freedom, but didn't really get it here, also financially it sucks...

FireHawk, yeah it can be harder to do music if you're living with some non-musos...
Son was good haha.

Sounds like he really didn't get the point of having a dorm!

I'm shipping out of this place tomorrow back to the parentals, to then start saving to buy my own place in the distant future!
^ We may now never know...
Hey all, this thread is too good to die.

I need to contribute still, but just thought I'd bump it a bit, as I've been watching it from the start.

trueamerican, that last guy does sound a bit weird! What was in his tiny bag anyhow?

p-nutz, I was after freedom, but didn't really get it so much here. I think being by myself, or with the friend who is living by herself, who I was going to move out with a couple of years ago but never happened, would be a lot more free feeling, especially in the city. I've got several music loving friends in the city, so do go there occasionally for awesome times! I thought my friend would be lonely, but she's always travelling about and seeing other friends, she would probably never be lonely! I think flatemate trouble should be sorted out as soon as possible, as otherwise it'll go downhill from what I've seen...
Jackal58, that's great! With house prices the way they are here, might be a while before I can afford one :/

p-nutz, I moved out into the same town, which is a sort of between urban and rural areas... the town is built up enough, has everything, but there's heaps of bushland and open space nearby! I guess I moved out for the hell of it, as it was a good deal, but now in hindsight it wasn't the best decision. I'd love to move to the city for a bit though, and explore all the music venues!

And I can understand with your flatmate problem, I have a friend who has been in several different places, due to not getting along with one person normally, she's now happily living by herself!
Getting some good stories here, all a lot better than mine!

Any house owners on here? I know there's a few older people on here that are sure to own a house. That said, I have a 20 year old friend who has just bought one :/
I think I would of felt better by myself, as then I could have my own rules, instead of my friend's ones. Too much of a change for me I think, apart from not being sure if we could live together for an extended period of time. This way, we get more space and I can stay friends with them.
So everyone, I moved out of the parent's house three weeks ago to live with some friends, and am already moving back, as I feel like I have less space here, haven't gained that much really, and can save for my own place quicker if I were to live at home.

Now I want to hear some stories from all you guys about moving out and living with other people, how it went for you, how it might still be going for you, if you like it, etc.

Rough up the area of plate you want to solder to with sandpaper or something to give the solder a place to stick to. Also "tin" the end of the wire, meaning to melt solder onto it first.
^Salgala, I've got a board like the second board, and for a power supply I have a small bit of pcb between the breadboard and the power/ground lugs with a voltage regulator and couple of caps on it. Pretty simple, and can be removed or bypassed if necessary!
Quote by blandguitar
What is Trend Micro? I've got no threats on my computer afaik. It hasn't even been 2 weeks since I ran a complete scan of my computer.

Anti-virus security program. It does a good job, but costs money.

It says "The website you wanted to see might transmit malicious software to your computer, or has done that before to someone else. It may also show signs of involvement in online scams or fraud."

That's not to say those pages are bad, it's just suspicious for some reason.
For some reason Trend Micro is telling me that all those links are dangerous? No idea why.
You may have to get a bit of sand paper or very small file and widen the gaps in the nut very slightly. I put 11 to 52s on my Epiphone LP and had to widen the spot for the low E string.

The extra stress on the neck means you might have to adjust it back slightly.
ICs work fine on a breadboard, you plug one row of pins into one of the A-E columns, and the other row into the F-J side! That's how we did it in my electronics course.

One drawback I can think of with breadboards is when the wires don't sit properly, and you have to go through your whole circuit, wiggling wires to try and get it to work. The more complicated the project, the harder it is to breadboard.
Try and keep the wiring neat and flat on the board if it's a big project, as otherwise you'll end up with a bird's nest, which aren't fun to troubleshoot.
All the best for the pedal building!
Not as many frets as that other guitar posted earlier, but Michael Angelo Batio plays a 29 fret guitar quite well in this video:
It's not amplifying the ground, it's a PNP transistor. It's also using germanium transistors. The next picture uses NPN silicon transistors, which will sound different, but they're more reliable then germanium. Note how the power supplies are in different directions in each picture. It's just how the transistors work.
Two moments, out of a few I could pick...

Saw Alice in Chains, was watching Mike Inez. He nodded at me and threw a bass pick at me! There's a chance he may of been looking at the person next to me but oh well.

Saw Metallica not too long ago, and amazingly they played Orion and said a few words about Cliff Burton. At the end of the show James got us all to sing happy birthday to Kirk as a guy dressed as Snow White got him in the face with a pie. Pretty memorable!
Hmm... cutting the treble can get you closer to the sound of a neck pickup, as the sound they put out tends to have more bass to it. But I'm not sure if there'd be a way to get an exact "neck pickup" sound from it.
Well that really simplifies things a bit! Thanks.
Hey guys, just wondering what different methods you all use to mount LEDs in your project boxes? I'm in the situation where the perfboard won't be underneath where the LED will be, and there's no spot nearby to screw a bit on to mount it. Surely anyone using a general jiffy box would have this issue! I've thought about using glue to keep it in place, but there must be a better way!
It sounds like you want tubes just because everyone says you need tubes?

If you think it's "good and versatile" then that's good. Any audiences watching you aren't going to be like "oh he's crap, that's not an ALL tube amp" and any guitarists watching you won't care either, especially if you're blowing them away with your awesome tone and killer playing, whatever the amp may be!

But if you really do prefer the sound of the other one over it, then go with that then.