atmasphere
Responses from atmasphere
| Tube arch So actually what u are saying is that when a tube goes bad it will always ARC ? And will take out a resistor along with it ? Is this on all tube amps ? Or Audio research? @tattooedtrackman Arcing is the primary failure mode of modern power tube... | |
| What are the best GaN Amplifiers available today? I found out later that Class D amps and linear power supplies don’t really go hand in hand, for reasons I forget why. @blisshifi There isn't a reason. The kind of power supply makes no difference if its properly designed. We use a linear supp... | |
| 300b lovers Why is so much harder to drive 300B? @alexberger Mostly because of the voltage swing. RC coupled circuits are a bit inefficient if you also want current to deal with that input capacitance (which admittedly isn't all that much). That is why tr... | |
| Tube arch I’ll keep this short. So my last post was about a tube arc. Took out a resistor on one of my Audio Research Ref 750s. I replaced the resistor and put in a matching KT150. My question is how can I avoid this from happening again. @tattooedtrackm... | |
| Balanced/Differential tube preamplifier recommendation? @thought9 I get it- back in the 90s we studied the remote issue for years; nothing was out there are the time that was at the level of our master control in the MP-1. So that remote didn't show up until the early 2000s. The MP-3 was harder due to ... | |
| Balanced/Differential tube preamplifier recommendation? @thought9 Yes, if a 4-dech control can be considered 'regular'. Turns out that due to a change we made in the volume taper about 8 years ago that the difference between the stepped control and the pot was mostly eliminated. | |
| Balanced/Differential tube preamplifier recommendation? Why can't the existing attenuator be motorized? @thought9 The control has to have 4 decks because its controlling both the inverted and non-inverted phases of the signal. The stepped control has to not exceed a certain size. The switch we use c... | |
| Matching the cartridge to the phono stage @jcarr +1 | |
| Help me choose an Audio Research preamp/line stage (Please?) I have heard that Vandersteen's like no negative feedback. @_rossbower The speakers themselves don't care. I think Richard (Vandersteen) hasn't heard an amp using feedback that does it properly. Feedback in itself is good, unless its poorly app... | |
| Balanced/Differential tube preamplifier recommendation? atmasphere really now? Is the IR sensor built into the preamp, and all that needs to be done is for a remote to be bought separately? Or do I need to buy a unit that is custom ordered with a remote receiver? @thought9 If its got a remote instal... | |
| 300b lovers @donsachs Unless the power transformer is replaced, I think its a bad idea to drop in a board using 6SN7s as much as I like that tube. 6SN7s have a 600mA filament; running 4 of them is 2.4 Amps! The transformer would burn up in due time. Yes, you... | |
| First Tube amp suggestions @tritube Looking at the impedance curve that @hilde45 provided, its obvious to me an SET will not do the job. You need an amplifier with a low output impedance, otherwise your system will have colorations. SETs have a high output impedance. If yo... | |
| Matching the cartridge to the phono stage Most phono pre designers seem to build around 100 ohms, but the SL is an outlier at being both low-output MC and recommending >400 ohms. Interesting. @paulburnett There's actually a standard for phono inputs, which is 47K. A cartridge desig... | |
| 300b lovers From this distance, I wonder about circuit stability. @lynn_olson They were quite stable and reliable. But the circuit is carefully designed around some serious issues with phase margin, which is why you really don’t want to try any serious mod... | |
| Balanced/Differential tube preamplifier recommendation? steakster I've looked at that one. Would be perfect if it had a remote @thought9 FWIW a remote volume control is available for the MP-3. |