Search found 366 matches
- 13 Aug 2014, 13:55
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Wampler Ecstasy bass control
- Replies: 54
- Views: 6284
Re: Wampler Ecstasy
I would check/remelt all solder joints. Then the next step to me is to check for bad capacitors, first in the feedback loops, then elsewhere. Make sure that you have the right orientation for the electrolytic caps.
- 12 Aug 2014, 13:25
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Wampler Ecstasy bass control
- Replies: 54
- Views: 6284
Re: Wampler Ecstasy
Hello,
Do you get the same results with wall-wart and battery? Is it boxed?
Do you get the same results with wall-wart and battery? Is it boxed?
- 03 Jul 2014, 22:37
- Forum: ICs (Integrated Circuits)
- Topic: Building A 4558 opamp from scratch.
- Replies: 20
- Views: 17512
Re: Building A 4558 opamp from scratch.
A discrete opamp has not much reason to sound better than an IC. If you don't like the sound of distortion of high gain / high feedback devices, then it will sound the same to you when distorting. You should try cascaded jfets designs if you haven't tried yet (low gain / no feedback).
- 03 Apr 2014, 01:27
- Forum: Printed/Published Online Designs
- Topic: "Personal monitoring system" design
- Replies: 24
- Views: 13081
Re: "Personal monitoring system" design
1M of input impedance will be fine, and yes, your should connect both L and R to the output.
DO NOT use R5 and C6, unless you want to have distortion and/or blow up your ears! It will be probably pretty loud without it already.
DO NOT use R5 and C6, unless you want to have distortion and/or blow up your ears! It will be probably pretty loud without it already.
- 02 Apr 2014, 15:42
- Forum: Printed/Published Online Designs
- Topic: "Personal monitoring system" design
- Replies: 24
- Views: 13081
Re: "Personal monitoring system" design
Actually, if I had to use discrete transistors as a buffer after an opamp, I would use a diamond follower (resistor biased). It uses 4 transistors instead of 2, but it is a perfect design.
- 01 Apr 2014, 20:18
- Forum: Printed/Published Online Designs
- Topic: "Personal monitoring system" design
- Replies: 24
- Views: 13081
Re: "Personal monitoring system" design
Alternatively, to simplify the design a the headphone amp, you could use a LM386. It is more than enough for the purpose and sounds decent.
- 01 Apr 2014, 02:50
- Forum: Printed/Published Online Designs
- Topic: "Personal monitoring system" design
- Replies: 24
- Views: 13081
Re: "Personal monitoring system" design
Hey, It looks good,except R3 and R7 that are way too high for the purpose: I would limit both of them to 2.2Mohms (or even less actually, like 470k if you intend to never plug a passive source in B). And make R2 and R4 2.2Mohms too by the same occasion to have a nice 1M as input impedance for the gu...
- 17 Mar 2014, 12:32
- Forum: Boutique Stompboxes dissected...
- Topic: Amptweaker - Tight Metal [traced]
- Replies: 634
- Views: 284815
Re: Amptweaker - Tight Metal [traced]
So it is just mainly a difference in scooping factor in the post-eq... Predictable, but also a little disappointing. It makes me wonder if I did not make a mistake on the TM t-filter. Could that 100n be in series with the thrash switch toward the ground? It would make the thrash switch less violent,...
- 12 Feb 2014, 17:22
- Forum: Boutique Stompboxes dissected...
- Topic: Wampler - Triple Wreck [traced]
- Replies: 420
- Views: 206332
Re: Wampler -Triple Wreck- [traced]
You can try to bump R22 to 1 meg or even 2 meg. It should not create any significant noise as it is far in the chain of gain stages.
- 17 Jan 2014, 15:04
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Wampler Ecstasy bass control
- Replies: 54
- Views: 6284
Re: Wampler Ecstasy
That explains everything... I firmly believe that triple checking values is the minimum in electronics!
- 10 Dec 2013, 18:38
- Forum: Switching & Wiring
- Topic: Wires - Stranded vs Solid?
- Replies: 6
- Views: 7486
Re: wire
You can buy a box containing dozens of solid core jumpers of different pre-cut sizes for a few dollars. It saves a lot of time during wiring, instead of measuring, cutting, stripping, and tinning the stranded wire. Also solid core wire stay tends to stay where you put it and does not spring back lik...
- 09 Dec 2013, 15:19
- Forum: Boutique Stompboxes dissected...
- Topic: Wampler - PINNACLE II [traced]
- Replies: 167
- Views: 95732
Re: Wampler - PINNACLE II [traced]
The Pinnacle fed with 9v can definitely exceed 5 v p-to-p. So can most pedals really... Usually, there is an analog buffer before the digital IC (an ADC?) so this analog IC will clip first. They are protected by diodes classically, so if you exceed the input range it will clip hard. It will sound pr...
- 05 Dec 2013, 15:47
- Forum: Boutique Stompboxes dissected...
- Topic: Wampler - PINNACLE II [traced]
- Replies: 167
- Views: 95732
Re: Wampler - PINNACLE II [traced]
Pin 3 would go to the point between R8 and R18.
- 04 Dec 2013, 17:19
- Forum: Boutique Stompboxes dissected...
- Topic: Wampler - PINNACLE II [traced]
- Replies: 167
- Views: 95732
Re: Wampler - PINNACLE II [traced]
It is better to wire that half as a buffer with the input tied to the mid-point of the PSU
- 04 Dec 2013, 14:19
- Forum: Modern Stompbox Effects (1975 - ...)
- Topic: BBE - AM-64 American Metal [schematic]
- Replies: 30
- Views: 23747
Re: BBE - AM64 [schematic]
Yes, it connect to the mid-point of the power-supply, which I randomly label N for neutral.
- 02 Dec 2013, 19:26
- Forum: Boutique Stompboxes dissected...
- Topic: Wampler - Ecstasy [traced]
- Replies: 93
- Views: 59323
Re: Wampler Ecstasy [traced]
As I stated above: There is just a handful of ways of clipping a signal, but there is an infinite number of pre-EQ and post-EQ voicings. I would say if the ordering of the components is essentially the same between 2 designs (e.g.: TS, SD1, and MXR ZW Overdrive), then it can be considered a "tw...
- 02 Dec 2013, 16:15
- Forum: Boutique Stompboxes dissected...
- Topic: Wampler - Ecstasy [traced]
- Replies: 93
- Views: 59323
Re: Wampler Ecstasy [traced]
My point, they are different enough: I meant to say the Ecstasy is as close to the Timmy as the Timmy is close to the TS: They look vaguely similar from afar, but that is it. The Ecstasy has hard clipping option and the Timmy does not: It is kind of a major difference! And gain is different, biasing...
- 02 Dec 2013, 13:13
- Forum: Boutique Stompboxes dissected...
- Topic: Wampler - Ecstasy [traced]
- Replies: 93
- Views: 59323
Re: Wampler Ecstasy [traced]
The Timmy being already a variation of a Tubescreamer... But really, there are very significant variations between these designs. They may look vaguely similar from afar but it is not the case, and that is why they sound very different.
- 02 Dec 2013, 04:59
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Wampler Ecstasy bass control
- Replies: 54
- Views: 6284
Re: Wampler Ecstasy
Yes, the 1k resistor is there to limit the high cut-off to something less than infinite. In any event, there is more highs when the resistance between lugs 3 and 2 is lower, that is the point, so a log pot will be brighter at mid-point compared to a linear pot. I don't know what pot law would be bet...
- 02 Dec 2013, 01:48
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Wampler Ecstasy bass control
- Replies: 54
- Views: 6284
Re: Wampler Ecstasy
Well, it makes sense to short the 2 pins because it creates a variable series resistor that interacts with the cable at the output. So when you turn the tone pot to have more highs, you introduce more series resistance that shaves highs by interacting with the cable. It is counter-productive. I agre...