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Messages - madbean

#3646
Quote from: midwayfair on March 26, 2015, 01:37:53 PM
Quote from: hobbits on March 26, 2015, 11:53:52 AM
Which resistor is responsible for the drop of volts ?. it is the R25 (47R) . Can I choose a lower value for this?

Yes. You could jumper it and remove D4 if you are going to be using a regulated power supply. Sometimes the charge pump can try to draw too much current and that little bit of resistance becomes a problem. (Did you use the LT1054 for the charge pump?)

Seconded. Jumper the resistor and see what the measurement is after that.
#3647
Open Discussion / Re: Win a Dismal Ax guitar
March 26, 2015, 01:02:56 AM
Yeah that is frikkin awesome. Except it needs one more pickup.
#3648
Open Discussion / Re: Win a Dismal Ax guitar
March 26, 2015, 12:25:00 AM
I like all of these. Very unique.
#3649
Open Discussion / Akai Headrush
March 25, 2015, 03:43:11 PM
http://www.thegearpage.net/board/showthread.php?t=1555991

Liquidation, it seems. Sweetwater has it for $90 but you can get them on eBay for $70, new. I've always wanted to try one of these out so what the hell. The separate outputs plus a looper seems like a win.
#3650
Open Discussion / Re: Bass VI vs Bariton
March 25, 2015, 01:53:17 PM
Baritone, brah. I love it.
#3651
Build Reports / Re: Zefiro Optical Compressor
March 24, 2015, 01:52:05 PM
That is beautiful. Great lighting and super clean look.
#3652
I seriously doubt it. However, I would measure several 100k pots and pick the one that comes closest to an actual 100k. That will directly affect the maximum delay you get.
#3653
Tech Help - Projects Page / Re: BC549b or BC549c
March 23, 2015, 10:48:02 PM
I believe C is also higher gain. Won't matter for a buffer, though. When it comes to gain related I use the C one.
#3654
50k is fine. It will give you more delay. I put 25k as stock to limit the delay (and therefore noise) but there is nothing wrong with using a 50k instead.
#3655
I will get that up this week. Thanks for the reminder.
#3656
You can bend them off to a 90 deg. angle if you do not want to cut them off.
#3657
I don;t think so. At least I don;t think you have a bad part necessarily. You'd really have to sit down and audio probe every single connection/component to determine that.

If the noise is coming right from the output of the brick (pins 1 and 5) then the brick is definitely the culprit. Or, possibly there is some noise from the brick which is then being amplified or accentuated by either the Muff tone stack or the gain recovery stage at IC4_B.

When you turn the tone control way up any hiss present is really going to pop esp. by higher levels of gain recovery with the T1 trimmer. But, this is mitigated somewhat by the filter formed by R30/C26 to reduce highs. From my own builds what was there was enough but it can certainly be a made a more aggressive filter without  too much compromise in the overall tone.

My point is that whether or not a noisy brick is to blame or not I think it's probably better to just fix it with tweaking values at this point.
#3658
General Questions / Vector graphics resources
March 21, 2015, 04:38:27 PM
Does anyone have a link to some free vector files/packs that would be applicable to pedal artwork? Specifically I am looking for things like knob hash marks, either interesting rectangle arrays or crescents...that kind of thing.
#3659
If your noise is isolated to the brick then I would do the following:
Socket C24 and try 470pF.
Socket C26 and try 22n or 47n.

This should cut out more of the highs esp. when the tone control is pushed beyond 50%.

#3660
Open Discussion / Re: NADT!
March 20, 2015, 05:35:56 PM
Super fun stereo setup.