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Messages - Rockhorst

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Open Discussion / Re: PedalTrain Nano
« on: November 20, 2013, 05:07:10 AM »
I've been using a Nano for years! It's great for jam sessions! I used to carry around a Pedaltrain Jr. on my bike, ruining my back. None of that since the Nano. Tuner, booster, overdrive, delay and I've got my basic tone. Usually put a wah next to it.

If I used 1590As like you did here, I'd probably be able to get my entire setup sans wah on there. Very pretty. When is your 1590A Wah coming ;) ?

Global Annoucements / Re: 11.01 - Function F(x) Fundraiser Announcement
« on: November 20, 2013, 02:47:51 AM »
@DutchMF: I'm probably in, maybe we should check if Conrad stocks it?

Open Discussion / Re: KOT?
« on: November 16, 2013, 09:12:33 AM »
@Garfo: yes, that capacitor rolls of some high end. Similar trick used in the feedback path of a Tube Screamer. The JHS Morning Glory has an additional switch that controls an extra capacitor in the 2nd feedback path, to roll off even more highs.

Open Discussion / Re: KOT?
« on: November 16, 2013, 07:55:36 AM »
Shameless plug: I'm offering some modded Blues Breaker boards right here:

PCB Pre-order: Boost, Fuzz, OD and Clean Blend

Global Annoucements / Re: 11.01 - Function F(x) Fundraiser Announcement
« on: November 15, 2013, 03:14:23 PM »
Transferred my funds :)

First ;)

General Questions / Re: Using a ICL7660SCPA
« on: November 14, 2013, 04:33:31 PM »
The Z denotes itbeing lead free.

I've used the 7660 quite succesfully, but in combination with some other stompboxes, it gives weird clock noises. So i suggest you socket it, so that you can replace it if at some point it interferes with your setup.

Build Reports / Re: 4 builds & 1 re-decal
« on: November 14, 2013, 04:29:57 PM »
An Emma Reezafratzitz clone built on a THN Technik board fabbed by Haberdasher. Really good distortion this one. I'm surprised it's not built more.

Why minions? Why Reezafratzitz...?

Clearly, all knobs should've been labelled BANANA

General Questions / Re: Attempt at Harbinger One Wiring Diagram
« on: November 07, 2013, 12:11:17 PM »
Don't mind me, but I think you should just use the board mount option with the harbinger. It's a pretty tight build and soldering the switches and pots directly on the board will save you a lot of hassle. Also, the holes on the pcb for the switches are really large, to accommodate the switch: not really meant for wires.

Avidgrim, try the suggestion made by Gledison just above (reverse polarity). This has, in fact, been pointed out a few times in this topic now, but you might not have spotted it. If ever you see an explanation or suggestion you don't understand, don't brush over it but ask about it, just in case. I tried to check it by your photos, but the lack of color coding just made that impossible.

Avidgrim, to get to your problems real fast (at least in the future) include as much information and as many details as you can about your build in the first post. Right now, I just keep coming up with additional questions before I can really help. Like: which transistors are you using?

Additionally, it might be wise to use a more colorful palette for your wiring, at least in the beginning. Really makes it easier. I use:
Red and Black for power
Yellow and Green for input/output signals
White and Purple for LED wiring and additional wiring.

So, what transistor :) Also (because of the wiring) it is very hard to check your wiring on the dc jack. I can't quite make out if you did it correctly or not. Use black for ground from here on.

Global Annoucements / Re: 11.01 - Function F(x) Fundraiser Announcement
« on: November 04, 2013, 02:25:27 PM »
Take my money indeed

Sounds like you're using reverse polarity?

Tech Help - Projects Page / Re: LowRider troubles with 2nd Octave Down
« on: October 27, 2013, 04:09:54 PM »
turned out to be a bad pot!

Tech Help - Projects Page / LowRider troubles with 2nd Octave Down
« on: October 24, 2013, 03:51:56 AM »
I just tested my LowRider build and it almost works, but there seem to be some problems with the 2nd Octave Down. Clean, Oct Up and 1st Oct Down work perfectly fine. The 2nd Octave Down is very much louder than the other channels and when idle (not playing) there's some weird ticking going on. It's not a constant tick, but it does seem to have some regularity to it. Kinda like the pedal sending out Morse code (tr-tr-tr-tr stop tr-tr-tr or something like that). This happens even with my hands on the strings and I can sometimes briefly shut it up by moving my hand slightly, but then it starts again. This would suggest to me some grounding problem? I think my IC readings support this idea, see below.

I've checked the IC voltages with the ones in this topic. Below are my values (half supply is about 5V), the ones I think are off/peculiar are in bold typeface. What I find odd is that it only manifests (at least audibly) on the 2nd octave, yet my readings of the 4013 ICs quite different with the reference ones. Is this consistent?

IC1:  TL072 checks out fine

IC2:  LM324
1  4.9 - 5.3 (periodically goes up and down)
2  5.1
3  5.1
4  9.5
5  5.1
6  5
7  4.9
8  2 mV (stays steady at this and doesn't go down to 0)
9  5
10  5.1
11  0
12  5
13  5.1
14  3.9 - 4.6 (periodically goes up and down)

IC 3:  CD4013 (9, 12 and 13 are really disturbing here, compared to the reference).
1  0
2  9.5
3  0
3.9 - 4.6 (periodically goes up and down)
5  0
6  0
7  0
8  0
9  0
10  0
11  9.5
12  0
13  9.5
14  9.5

IC 4:  CD4013 (lots of differences here)
1  0
2  9.5
3  0
4  0
5  9.5
6  0
7  0
8  0
9  0
10  0
11  0
12  0
13  9.5
14  9.1

IC5:  TL074 checks out fine

IC6:  TL074 checks out fine

Any suggestions?

*Edit*: Just to clarify, when playing everything is fine, also on the 2nd octave down. But when I stop playing it makes noise, sometimes intermittent like Morse code, sometimes a constant chop-chop-chop like there's a helicopter in the room, and it's quite loud. It's seems periodic, which makes me suspect something with the clock? At the moment it's a pedal that literally demands you keep playing ;)

General Questions / Re: Help: OC140 pin out question.
« on: October 24, 2013, 02:28:58 AM »
OC139, OC140 and OC141 are sort of symmetric: they can work both ways. I've had a bunch of OC139 transistors that had higher gains when used reversed.

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