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A couple of comments: Do the amps compare OK on static measurements? If OK presumably he is fighting a transient problem. How do they compare with narrow transients? Do the catch-all Hafler test

Any diode will do that, and a transistor junction is basically a diode... I remember reading how rectifiers could be used as varactors to tune circuits. -- Member of the toughest, meanest,

How do you define high end? But "identical" parts usually aren't. The amount of variation is really somehting to see, sometimes. I have a stero receiver and equalizer in the other room that have

He came up with the preamp, tone, volume, balance, power amp designs 35 years ago. He's been forced to make minor component value changes as semiconductors came and went. The design is somewhat

Think harmonic distortion. With an FFT analyser you might see it (or not??? I think I got a glimpse of it…) It might happen at 250kHz, but will extend far into the MHz, and AUDIO spectrum! Those

There is a never ending, intense, perhaps psychotic, argument over "Can humans detect phase differences [or phase distortion.] and it shows up in the amplifier wars... This paper takes hard core look

My plan is to compare old good devices with new wonky devices and see if there are any determinable differences.

The matching (testing) amp needn't be perfect - just good enough to compare devices. That's the point. Donald.

Sockets tend to be a bad idea for transistors in high performance audio systems. Even with gold plated transistor leads and sockets, they are a severe failure point. If we can figure out what

I think as I remember at the time, all the rage was about phase. An amplifier could brag about having little to no phase shift over the passband of 20 to 20,000 Hz. That higher bandwidth helped keep

What moron decided an AF amp needed that frequency response!? That's not asking for trouble, that's begging for it.

No idea if this is practical. How many devices in the amplification chain need to be matched or are critical spec-wise? If there are a small number, he could build a "matching amp" with sockets

Years ago, I purchased new an Adcom GFA-545 which also sounded terrible. One channel was oscillating at around a megahertz, which bleed into the other channel too. The manufacturer “stopped at

Jimmy designs complete home theater systems, video switching, audio switching, audio tone/volume/balance, he provides a loop for special effects like 3D decoders, and power amplifiers, "regular"

I second your view! Lots of snake oil and smoke around. Those who do know, keep their mouths shut, and their bank accounts are getting bigger Nuno t. Sent: 07 December 2024 18:37 To:

The problem my friend is almost certainly facing is the parameter(s) that are driving him nuts aren't standard and aren't specified. I'm sure a process engineer could provide us with a wealth of

As others have said, high end audio goes into the realm of non-book theory. What actually happens is not what you’re thought at school. It resembles radio behaviour. All sorts of weird stuff going

'Galvanic' isolation means no common electrical connection, intrinsic means no common electrical connection with a specified safety factor, if unspecified, it would generally mean isolated up to the

I like it, use a super fast, low noise opamp to do the summing and monitor the output. By chance did an amp with ungodly high TIM happen to be a Crown DC-300? [What an overrated POS] I worked part

Found a few low voltage isolated buck converters on Amazon, 12/24vdc in, 12/5vdc out. While I could make those work, the cost is high. I need something that is able to deliver 12vdc, at least