atmasphere
Responses from atmasphere
| Help me diagnose a terrible new noise from my tube amp!!! One other way motorboating can occur is if the coupling caps are a larger value than they should be. If they exceed the frequency poles in the power supply, the amp will be able to modulate the supply and the result can be a low frequency oscillat... | |
| Point to Point vs Circuit Board Some may not but some may. Many times we played beat the proto...This is why I was careful to use the word 'properly'. | |
| Help me diagnose a terrible new noise from my tube amp!!! Now, for context, I replaced the coupling caps on both of these monoblocks a week ago (with caps to designers spec) and I may have screwed up the soldering somehow. But I played these amps for several days at normal bias without any issue unti... | |
| Atma-Sphere MA-1 tube rolling I was most surprised that this was the failed tube, as it was a new tube, with less than 30 hours on it, and it was a modern Tung Sol 6SN7 GTB. . . so it appears that currently Ralph’s suggestion to stay away from the Russian 6SN7’s seems to be... | |
| Class D amps seem poised to take over. Then what? However what is missing is the decay,the harmonics, the shimmer,the lilt,the atmosphere,the musical feel,the tintinabulation.Lovely. This property is not the perview of any particular technology IME. | |
| Point to Point vs Circuit Board We use hand wiring for our tube power amps. But we use circuit boards for our preamps. This is because in a preamp you have to control stray capacitance much more carefully and consistency is important. Preamps (especially if a phono section is in... | |
| Anybody else waiting for GaN and Purify to have a baby? I don't think that is a good guess. Ease of heatsinking? Have you seen the tiny heatsinks that people use on the GaN's.Look how tiny the heatsinks are on this new Orchard 250 watt into 8 ohm module are:https://orchardaudio.com/starkrimson-ultra-... | |
| Best turntable and arm under 10k? For that kind of money you can have a Triplanar on a Technics SL1200G. One of the most trackable arms made on one of the most speed stable turntables made. | |
| Class D amps seem poised to take over. Then what? You can certainly get plenty of body and warmth out of SS amps.It may not be typical for the breed but SS amps like that are not hard to find.Most of the Nelson Pass amps,Audio Flight,Electrocompaniet,Usher,Sugden,Dartzeel and many more.And Bak... | |
| Anybody else waiting for GaN and Purify to have a baby? If I had to guess I would say that Bruno prefers the ease of heatsinking his output devices, which is why he does not use GaNFETs. Back about 5 years ago there was a distinct improvement in switching speed offered by GaNFETs but that's all but gon... | |
| Point to Point vs Circuit Board The issue is stray capacitance. In solid state amps this is far less of an issue with solid state since the impedances are so much lower. As a consequence there's no advantage to hand wiring a solid state amp other than not spending the time and m... | |
| Class D amps seem poised to take over. Then what? Can I simply inquire as to whether the new age of Class D amps are fostering that feeling of warmth and body that one gets from Tube or Solid State amps? @briggtrim If the class D amp is designed properly, yes, it will sound smooth with warmth a... | |
| Class A Power in A/B amplifiers? What I meant to say that my own ears have yet to discern a preference of Class A over Class A/B or even D which is even moderately consistent. :) This is an entirely different issue! If the amp has feedback, you'll probably not be able to tell an... | |
| Class A Power in A/B amplifiers? Personally I find the arguments for/against Class A on technical terms alone lack overwhelming evidence. @erik_squires The arguments are twofold for which there is a lot of evidence if not proof. The first is that you can bias the device in its mo... | |
| Class A Power in A/B amplifiers? There really is no such class as Class AB, it is used to describe the mode of operation when a Class A amp hits a low impedance and one of the pairs of output transistors stops conducting. This statement is false. Class AB is defined as any push-p... |