Search results

Have you actually read my writing? I never questioned the cost of a relay bypass system. A look at my local dealer tells me that a Gorva 3p2t switch, which I trust, is about 6 bucks, and one of the momentary ones I would trust like Alpha or APEM, are 9-10 bucks. I have no means of validating...

Clocks... I have a circuit with an LFO. There is some evidence with feedthrough. The PCB layout, although stringent, inevitably is vulnerable, so the cable to the input... Point taken. So a proprietary design, as you describe it above, will help. But not one of the retro-fit units that reside...

The extra capacitance (against ground?) for this small piece of cable can not be more than a few pF. Where should noise come from? External noise is completely shielded by the metal case. The switching pops come from either inrush currents, or from voltage steps caused by the contacts itself...

The term „professional“ hast recently undergone severe deterioration. I have to talk about that for a bit. Somebody is deemed „amateurish“ if a person is not good at the elusive task he is trying to accomplish. This is most certainly the case for music-electronics forae like this, where there...

A look at claims to improve reliability and performance using a Relay Bypass. I recently felt impelled to haul out my knowledge on programming microcontrollers and try that on a relay bypass. Invariably, I tripped over several statements on web pages that turn out to be untenable claims it you...

In case you don't like it, try Soulsonic's "Crackle Not Ok!" mod to a SHO stage. For super bright LED's as bounding network: I have tried those on occasion, and they do sound different. They can be lit with such a ridiculously low current, that they seemingly have a different behavior in their...

... which I was indeed. I thought Chuck's version was just an improved version. But incidentally, the demo I heard sounded dark, and I thought I heard the ole MOSFET. So much for perceiption...

Ah, the ole' interstage attenuation. The heart and soul of all tube amps. Yes, this would probably need to be revisited. But truly, I don´t expect sonic miracles out of the technology. Your self-knitted push-pull approach is remarkable though.

The Muff doesn't, but the inverters do. To my ears a discrete MOSFET stage like has the same "something" in its tone. Something dark. I agree, Muffs can sound ugly - and they generally do to my ears. Unless you noodle along with some Gilmour-ish chords, then they work. BTW, the inverter drive...

I once aimed a shot at an inverter overdrive. I used N.O.S. Motorola MC14049UB, which are very quiet. I used the output stage of the Fat Sandwich WH-301, which wires the unused inverters in parallel for even lower noise, with a front end like above. Indeed, there is no perceivable noise. Note...

It was touted as being marshall-esque, but what unit is not? ;) It is very flexible indeed. You like it overall?

I once made one of those in pursuit of the Marshall tone. I just looked, it was 15 years ago. I made a second one for my friend, and for a while we thought it was the bees knees, but then we got bored with it. Maybe this is some kind of listening fatigue. Back then, I noticed that the reference...

I can see what Willmott is driving at. You can wind the drive up and it does the bee-hive, BUT only if you don't limit the bass into it. It behaves like an early Marshall amp, which was nothing but a Bassman put upside down. With the advent of the Plexi a 720 Hz highpass was introduced that made...

I have made a few designs with TMK (too many knobs) just to determine their value. I found a pre-distortion bass cut is invaluable in units like fuzz-faces, and also in units that get bass-heavier the more your increase the drive. I usually make provision for such a control in the PCB, and...

Your compound version the Sziklai pair I have not seen anywhere else. Really neat if you get it working. The larger ground leg resistor made the feeling of the pedal totally different. Even engaging the TURBO switch is now palatable, although too much for me. I find BMP tonestacks a PITA, I...

I built a unit. I appreciate the engineering work you have done, some of which was new to me. I built it because I found the distortion mechanism intrigueing and alluring. Such as the compound j-fet / bjt Sziklai pair. I did quite a bit of research to understand that. I had to, because it did...

Ah that makes sense. I was aware that the parts were chosen with intent. I did not think too much about the bass filter. I had initially thought that maybe there was a sonic reason, comparable to what a higher hfe transistor does in a fuzz face, something that came out of practical experience...

Chuck, May I ask why you chose to use darlingtons for the differential pair? It ist not quite obvious that you did, because you drew them as if they were standard transistors. In the original circuit they use standard transistors with a hfe of no more than ca. 500 - the darlingtons will be a...

It was a wah coil that was picking up the noise, and I have an application pending using a coil. The ones I have are termed DS2E-DC5V, lacking the "S" or "M" suffix which the current production (?) units have. I found a reference that claims that they are equivalent to the "S" type, which I...

Just for the record... I had used a similar circuit in the vicinity of a coil in the audio path (a wah). Using an OMRON G5V-2 seemed to induce a spike into the coil, and I had to resort to all sorts of trickery to bring this down to a palatable level. I got hold of a box of NAIS (= Panasonic...