Problem with Super Hard On

[kaboom]

Hi, I wanted to make a super hard on like this: http://www.diystompboxes.com/smfforum/index.php?topic=82566.0
but I can't get it working!. I've tried 3 different BS170, and still isn't working.I've checked cold solder joints, but there aren't any(In fact,I did it in a perfboard, so I used the leads of the components) I'm getting 8.8v at the +ve, and still 8.8v in D1,R1 and Drain(q1) But I get 0.0v in Gate and source.
What should It be?

[jkokura]

Have you seen the debugging thread? In there there's a list of instructions that might help you give us some good info that could help us help you.

in the meantime, I usually suspect wiring, backwards or wrong parts, and cold soldering joints. I know that it seems frustrating to do this, but triple check and verify you have each part in there correctly, that each part is the right one, and that they are all soldered together right. With perf board it's even easier to check your joints because you can easily do a beep test to check conductivity on each side of the solder joint.

If that's not it, it might be your wiring, but you didn't give us any details about that. See if you can get it working without a switch or LED, just connect jacks, ground and power and see if that will work for you.

Jacob

[JKowalski]

Problem with Super Hard On

Where has Markeebee been?   

[frequencycentral]

Problem with Super Hard On

Where has Markeebee been?   

Dude! 

[Schappy]

Kaboom,

Did you get your Boutique fuzz to work?

I hope you didnt give up on it and decide to work on a new project. I would work on that one till its right then move on.

Knowing how to debug is really a necessity.

Im not for certain but I believe the gate should be 1-2V and the source should be around 0 volts.

Also while your building pedals read through some tutorials on how transistors work.

Im still a beginner and still learning the theory but learning to debug a circuit  with a probe has helped me a tremendous amount.

[stringsthings]

Knowing how to debug is really a necessity.

excellent advice.  and with practice, debugging is a process that can give you a great sense of accomplishment.  and it's free!  

[pleiades]

This sounds like a continuity problem.

Disconnect your circuit from your power supply (battery or wall wart) and set your multimeter to "continuity test."  It's a setting that usually looks like a diode symbol; you will know you are on the right one when you touch the probes together and the meter makes an audible "beep."

Now, with the schematic in front of you, touch together every part of the circuit that SHOULD be hooked together, but touch them as far away as still relevant.  For example, if a resistor is hooked to ground, touch one probe to the "ground bus" (negative battery hookup, for example) and the other probe to the inside of the resistor's leg.  Do this for ALL connections, but especially connections to ground.  After you have verified that everything that should be touching is indeed touching, hook one probe to ground and touch EVERYTHING, especially suspect parts.  In this case it sounds like you are having issues with your FETs.  Also try parts with nearby solder joints.

You will eventually find a connection that should be there but isn't, or vice versa.

[kaboom]

@Schappy

I didn't give up on the Fuzz.I just messed up the PCB while doing soldering and I had to do a new one, so I made a super hard on(was also on my "have to do" list) while I was able to buy the new things or the fuzz

@pleiades
Yeah,definetely was a continuity problem,It works now! I think it was some cold solder joint on the +ve of the battery clip hehe

By the way, It works now, but it kinda works strange.For example, the pot works backwards,I mean, pot to the left=more volume(So I get max boost on 7 o clock) and, this may be my imagination but, when I watch demos of the super hard on, it acts as an overdrive when pot is near to the maximum.Mine doesnt, is always clean

[jkokura]

Sounds like you have the pot wired backwards. Switch the wires around (leave the centre one) and see what that does. Also, it will be clean unless you're pushing your amp's preamp into overdrive. It's a clean boost mostly. Turn up you amp until you're right at the edge of where it drives. Then play clean, turn on the boost and see if you get some overdrive then.

Are you using a tube amp or solid state? That makes a difference too.

Jacob

[petemoore]

  Amp with headroom [turn the volume sorta low] should get a lot louder when boosted [booster on / up], the booster works [biased and correctly wired].
  Should be plenty bright too with that circuit input being very high impedance.
  Boost will push a device next or later down the line that distorts to distort more. It may even cause the onset of distortion in devices that without boost, don't distort, amp headroom/type, and settings may vary.