The Amp Garage

alnight wrote: ↑Wed Feb 28, 2024 9:32 pm I'm currently acquiring and A/B testing different power cords to find out which I like best. They clearly sound different on my amp, that I built. I really did not expect to find that.

At some point, I think I'll just sit back and watch the show.

Percussive- articulate , strong pick attack , upper midrange characteristic. As bepone said , strong chicken picking OK. So: "Percussive" = "articulate" + "strong pick attack" + "upper midrange characteristic" Can you assign anything (1) repeatably (2) measurable to "articulate", "strong pick attac...

interesting that you dont hear metal film vs carbon film differences in the sound, also polyester vs various polypropilene caps.. with so much experience. difference is huge. not on all positions the same.. And as I have said, interesting that you > do < hear them, especially for film resistors. Th...

why not only using soldering iron? it is very difficult? I've been using a soldering iron since about 1966. I've been building my own audio equipment since then. My first self-built guitar amp was 1967. Never really stopped. That's not the issue. It's not as simple as "solder in some different comp...

The big disconnect here is that people claim that they hear changes for which there is no good technical explanation. The technical aspects of components - their basic nature (e.g. resistance, capacitance, inductance), their parasitics (stray inductance, capacitance, leakage, ESR, dielectric absorpt...

When I look at the sky and see blue..,I don’t need to believe it’s blue… Yep - you get to experience that the sky is blue. I think you're missing a subtlety here. Just because you believe it's blue doesn't mean it's NOT blue. The sky can be and has been independently measured for luminosity (Egad! ...

Got a story that seems like it might fit here...had a jam at my house a while a back, and a bass player I respect was using my rig. He kept twiddling the EQ until he had it exactly how he wanted. The problem? The active EQ wasn't turned on...He was *certain* he'd dialed it in, though! Once I pushed...

No problem. Fuse blowing debugging is hard because when the fuse blows, all work stops until it's replaced. Using a light bulb limiter can help because it can keep the fuse from blowing until you can find a problem, but then figuring out exactly what is eating all that current is hard because tools ...

Another difference is that history has shown that very often careful(*) testing of the people who hear differences finds that their ability to hear a difference vanishes whenever the testing can be methodical enough to pin down whether they actually hear a difference or are getting visual or other c...

Have you been through the procedure titled "Blows fuses debug" listed at the top of the forum?

Sigh.

Hmmmm... plastic spudger?

ESD protection devices are great for dissipating transient surge voltages, but are useless for mundane voltages such as input signals exceeding +/- 20V. Zener diodes or other strategies are needed to prevent device destruction from these mundane voltages. Also, it is not clear whether a zener diode...

Hmmm. I did go look at the datasheet before posting (here: https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/LND150-LND250-N-Channel-Depletion-Mode-DMOS-FETs-Data-Sheet-20005454A.pdf ), but I missed the statement "ESD gate protection" right up front on the fi...

And is the only possible source of this voltage whatever the user puts into the input? Yes - including scuffling across a carpet and then touching the end of the guitar cable to plug it in. Several kV is pretty common for things like that. Then there's the static electrical gradient, about 120V/met...