atmasphere
Responses from atmasphere
| Advice on Repairs for Audio Research VT100 Mk II There are 8 power tube 100 ohm 5% 3 watt screen resistors. (Part # 43100208) ARC uses the resistors as fuses. The wattage value should never be increased. @fsonicsmith @jea48 The resistors should be adequate to survive a tube failure. Series ... | |
| Advice on Repairs for Audio Research VT100 Mk II I love the sound but the amp has needed two repairs within the first 6 months, so it's really put me off the whole tube amp thing. @edward78 FWIW, there are tube amps out there that don't require resistor replacement (which might mean a trip to... | |
| SUT - electrical theory and practical experience Look, the main SUT limtation vs an active high gain SS alternative is its way limited frequency bandwidth If you are using opamps, you'll need a fair amount of feedback and that feedback will correct phase shift. So even though an opamp can be... | |
| Buzzing from speakers on TT rig It was not a static issue but violent snapping popping as soon as you touched anything. @mofojo This is very typical of an ungrounded phono setup. You mentioned that it occurs when messing with the phono cable too Even through using only th... | |
| Advice on Repairs for Audio Research VT100 Mk II Yikes. 13 hours of time seems excessive for the damage. The resistors were damaged by the power tubes FWIW. Its reasonable to expect that every time a power tube fails a resistor could be damaged- and so will need another trip back to the shop...... | |
| Buzzing from speakers on TT rig This really sounds like the ground wire is damaged, possibly right where it connects to the phono section. | |
| GaN guitar amps? There are still some top notch players that don't use petals at all, Ronnie Earl comes to mind, I don't think this type of player will be switching to class D anytime soon. I don't either- mostly on account of the dearth of such amps to begin w... | |
| GaN guitar amps? When it comes to what players call “tone” it’s almost certain there will be an overdriven tube amp in play. @designsfx That was certainly true decades ago but now, not so much. There might be an overdriven tube, but that tube may not be in the ... | |
| SUT - electrical theory and practical experience Btw, what atmasphere posted was theory that today it just does not happens and all that that you can use balance cable connectuion to the phono stage because th SUT is bs @rauliruegas Clearly you have no idea of what you are talking about. Tra... | |
| SUT - electrical theory and practical experience you have often mentioned the notion that high gain phono input stages need to be designed to be insensitive to RFI. What design elements contribute to that good behavior? Is it simply a matter of limiting the bandwidth? @lewm I wouldn't say i... | |
| SUT - electrical theory and practical experience SUTs are tricky and they do have advantages. The tricky bit is they have to be loaded correctly. Many SUTs are meant to be used with a specific cartridge; such SUTs as a result are meant to be loaded at their output by the 47K input impedance of ... | |
| System that sounds so real it is easy to mistaken it is not live @lewm You're referring to the B1 subwoofer. One of our customers ran a pair of B1 subs between his A1s. It was helpful to get the bass excursion off of the main panels so it could be lower distortion. | |
| System that sounds so real it is easy to mistaken it is not live Please don’t try to state what you not0 even experienced because what you posted about is that you have not the experience to listen true bass down to at least 16hz with out almost distortion and at near 120dbs. @rauliruegas That is so funny- R... | |
| Why do Tube Amps sound more romantic v SS amps Please try to measure distortion of tube amp while adjusting bias/balance of the output tubes, and you’ll see how sensitive it is. Then please repeat the same after 50+ hrs. If you are luky, and your AB tubes are aging the same pace, then distort... | |
| Open Baffle Experience @audiokinesis +1 |