atmasphere
Responses from atmasphere
| Why aren't new vacuum tubes as good as old ones? The tubes they are making in Carson City take advantage of modern techniques- computer modeling and lazer cutting so they have avoided expensive dies. I'm very interested to see their production tubes! | |
| Why aren't new vacuum tubes as good as old ones? Tubes these days are fired incorrectly so there are contaminants caused by the getter being under or over-fired. Cathode structures are not being built with proper care. Contaminates get introduced, causing grid contamination during the operation ... | |
| How to repair or replace a power transformer? Sorry to hear that. You will need to get AC voltages from the other amplifier. I would run the transformer with no load and test its voltages, then hook it up and measure them again so you can give these figures to the transformer vendor you choos... | |
| Amplifier Input Impedance OK. So are not some loudspeakers designed with very low impedences so that they will audition better because they are louder? (and I understand that this is not the same as sensitivity.) Does that not relate to input impedence in amplifiers?Not re... | |
| Question about shipping damage The attendant used 3 layers of thin foam and then three more layers of the large bubble wrap. She placed it in a tight fitting box. Then placed that box into a larger one filled with peanuts.The problem with this approach is that any blow to the b... | |
| variance of +/- 10 Hz with 1 kHz test tone That's about 0.1% isn't it? maybe sounds a little on the high side... | |
| How to repair or replace a power transformer? Hmm. Did you disconnect the transformer from the rectifier?If not your test may not be conclusive. | |
| Amplifier Input Impedance Input impedance has nothing to do with gain. You can have a high input impedance on a solid state amp by using FET devices at the input.Large solid state amps with a low input impedance often do have a lot of gain as they are designed for use with... | |
| How to repair or replace a power transformer? It will likely be more expensive to repair a damaged transformer like that than it will be to replace it, even if the new part is custom-built to do the job. It will be handy to get some voltages from the amp that works, and its likely that you ha... | |
| good preamp for dynaco mk3 monoblocks with maggies Could well be. But the 11 had troubles of its own. I think you are better off getting an old Citation 1 and getting it refurbished, or going the route I suggested with updating a PAS-3. Either way you wind up with a better sounding preamp if the w... | |
| the 27 or 05 Neither preamp supports the balanced standard, FWIW... Jmcgrogan2 has got it quite right. | |
| Amplifier Input Impedance Stickman451, you are correct as is Jmcgrogan2. Its easy enough to design a solid state amplifier with a high impedance input (100K); they could even make it switchable if they wanted. Although our preamps are vacuum tube, they can drive even 5K wi... | |
| Wood armwand vs Metal armwand Sarcher30, Good! I've had my Triplanar about 9 years. No problems with it either. I don't think its realistic to compare speakers and tonearms. That's a bit of a stretch. But I agree- in the case of speakers, I much prefer wood products (paper) fo... | |
| good preamp for dynaco mk3 monoblocks with maggies Sbrown, If you are going to refurbish an older ARC preamp, the SP-10 is a better choice. | |
| Quad 63 ESL Rebuild - A Horror Story Does anybody own a calendar? Check the date on the original post. Zombies! |