Tube Screamer Debug - No treble

[strungout]

I'm at a loss :/

I need fresh brains. I built a TS9 with a clean blend. The clean blend works perfectly. On the TS9 side I found a few error that I fixed. Wrong orientation on Q1 caused hum. Wrong component connections. Now my problem is, well, it sounds like a fuzz with a tone knob rolling off ALL treble.

Notes:
-27n cap replaced by 33n (other wasnt available)
-Opamp: NE5532
-Q1-2: 2n5088
-Q1 is inverted on the layout but I switched it around.
-Ommited the volume pot (no adverse effect on my breadboard)
-Voltages:

Source: 9.33V

IC1 (on the right):
1-4.62
2-4.63
3-4.63
4-0
5-4.62 (this is the clean side)
6-4.62
7-4.63
8-9.33

IC2 (on the left):
1-4.63
2-4.62
3-4.61
4-0
5-4.60
6-4.60
7-4.60
8-9.37

Q1:
E-3.36
B-3.78
C-9.33

Q2:
E-3.63
B-4.04
C-9.35

Layout:


Schematics (Both in parallel):
http://www.muzique.com/schem/ts808.gif

http://diystompboxes.com/pedals/schems/shakaboost.jpg

Hoping for some thoughts I might not have had!

[PRR]

> I found a few error that I fixed

My 2 cents says errors come in packs and you have not found all of them.

Look especially to the "1K" "0.22u" network, and all around the tone pot. 100K can look a lot like 1K.

[duck_arse]

have you corrected the orientation of those transistors Q1 yet, or are you really using BC548's?

[edit :] second and third look. and fourth.

[strungout]

@duck_arse: Yes that was one of the few mistakes I caught, it cause a loud hum, which is why I was posting in the first place. Then a new problem reared its head.

@PRR: Ive check my values and caught two more errors. 1- a 10n in the fb loop of IC1a. Changed it to 47p cause I couldn't find a 51p. 2- On the shaka boost side I used a 470 instead of a 470k. But like I said, that side works well.

I'm in the process of checking my connections for the nth time... Because of the sound I get, that no treble fuzz, I'm thinking a cap might be shorting somewhere and creating a lowpass filter or something...


UPDATE: I replaced the 470ohm with the right value and it opened up the sound a good deal. Still not what I get from the one on my breadboard. The only difference between the two is I have a 22n input cap instead of the 33n I chose in my build. I know raising it lets in more bass, but can it make THAT much of a difference? Think I'll try it in... Not it.

[PRR]

> Wrong orientation on Q1 caused hum.
> Wrong component connections.
> 10n in the fb loop of IC1a.
> a 470 instead of a 470k

I see a pattern.

When you find one mouse in your house, there's more you have not found yet.

I'm not laughing. At least you found a variety of wrongs. I once did a fairly complex circuit, from a kit, with OK instructions, yet managed to put in *all* TWO DOZEN 0.1uFd caps WRONG. Not to mention my adventures with a furnace fan, where a wrong-wire would blow-up an expensive furnace, and I KEPT doing it wrong.

[strungout]

> Wrong orientation on Q1 caused hum.
> Wrong component connections.
> 10n in the fb loop of IC1a.
> a 470 instead of a 470k

I see a pattern.

When you find one mouse in your house, there's more you have not found yet.

I'm not laughing. At least you found a variety of wrongs. I once did a fairly complex circuit, from a kit, with OK instructions, yet managed to put in *all* TWO DOZEN 0.1uFd caps WRONG. Not to mention my adventures with a furnace fan, where a wrong-wire would blow-up an expensive furnace, and I KEPT doing it wrong.

No worries.


Think it's time to call it. Retraced everything again and can't find any more faults. Maybe this is just how this build sounds... Trying to make myself feel better 

Thanks for the help!

[turdadactyl]

Not a single "all about that bass" comment? 

[strungout]

Now, THIS is awesome. I needed that: I just built another one of this circuit using the components on my breadboard and it worked right away. Right. Away. No debug at all! Sounds good too.

But now I got another problem... because I got that damn song stuck in my head!