atmasphere
Responses from atmasphere
| Let me end the Premp/Amplifier sound debate ... He said 'an amplifier is a straight wire with gain', defining his belief that 'all well designed amplifiers sound the same'. @clearthinker When he said that, apparently no 'well designed amplifiers' existed- they all sounded different! On top o... | |
| Is rectifier tube arcing a problem? Yes, mine also has 220uF capacitor, and yes, the arcing only happens when the amp is turn on. After than, and if the fuse doesn’t blow, the amps sound fine. Nailed it! I would replace the capacitors after the choke with 50uF devices rather tha... | |
| Let me end the Premp/Amplifier sound debate ... These alleged sonic difference between power amplifiers, are they musically significant? They can be! I think the mistake that Julian Hersch and a lot of the folks over at ASR were/are making is arbitrarily deciding how low distortion has to be... | |
| Is rectifier tube arcing a problem? If it is, that 220uF value seems really high to me! An SET is a class A device so the load on the power supply is constant. If you cut all those values in half I think you’ll find that the rectifiers hold up just fine. This appears to me to be a ... | |
| Linlai E 6sn7 tubes I have the Shuguang Treasure 6SN7s on my Don Sachs preamp. Don says in his website that these simply walk away from the holy grail NOS tubes. That's quite a statement. Obviously this is not the case with all NOS tubes...as a lot of the culture t... | |
| Is rectifier tube arcing a problem? min the diagram, I need to add two diodes per tube, am I correct? Yes. I agree something is up in the amps- the 5U4 should easily handle the load all on its own. It sounds like something is causing an excessive load during warmup, which is a c... | |
| No more "High End" for me...Back to Reality Audio Even had another powers urge last Saturday and this time I was home. A power surge should never knock out anything more than a fuse. If the equipment was off at the time, its more likely it was a lightning strike on the AC line, which can take ... | |
| Is rectifier tube arcing a problem? A 5U4 should handle that load just fine. I think you've had bad luck with tubes... Is this happening in both channels? Do both channels sound the same? | |
| Indicators of worn/bad capacitors? visual clues include swelling, discharge of any substance at the base of the capacitor, heat discolouration and general old age (although old caps can still function OK). This is only if the capacitor is heating up. If the cap isn't heating abo... | |
| Is rectifier tube arcing a problem? @gte357s One thing that can cause rectifier tubes to arc is too much capacitance at the input of the power supply. What amp are you using? I've seen a lot more arcing failure with Russian made rectifier tubes. Depending on the amp you may have ... | |
| MAT - platter material, thickness/ resonant frequency - thoughts please @lohanimal Acrylic can be variable in hardness. Oracle makes an acrylic platter pad that is really close to the hardness of vinyl and not surprisingly, works quite well. | |
| MAT - platter material, thickness/ resonant frequency - thoughts please A platter pad needs to do two things: control resonance in the LP and minimize resonance in the platter. To do the former the mat has to be the same hardness durometer as the LP so all frequencies are absorbed by the mat. If the mat it too soft o... | |
| Do high end manufacturers need retail outlets? I have to wonder how much of the "high end" even needs audiophiles. So much of it has gone to installers catering to the uber wealthy. @erik_squires Installers? This is news to me. Installers usually work with mid-fi stuff IME. | |
| What made you change to a 6SN7 preamp? I think you were reinforcing the point I was trying to make that it's not all about the tube? That is true. But if you work with tubes over time, you get a feel for what they do. More to the point though that in order to really compare what th... | |
| What made you change to a 6SN7 preamp? I was immediately struck by how much quieter it was, how much detail it had, and how it presented as good or better of a soundstage and had very precise imaging. It would be lovely if we could attribute the characteristics above to a particula... |