atmasphere
Responses from atmasphere
| How am I frying all my amps? Oscillating? Help If you suspect the preamp has DC at its output, that is where you should measure for it. Some amplifiers have an input coupling cap and many don't so there is no guarantee that you will read DC at the output of the amp just because there is DC at ... | |
| How am I frying all my amps? Oscillating? Help Leoturetsky, in this we have narrowed it down substantially. I'll be surprised if it is the speaker cable, but I would not let that stop me from trying a different one.If the cable has no effect, the simple fact is you have had a run of bad luck, ... | |
| How do autotransformers affect sound? Arthur, FWIW the ZERO (zeroimpedance.com) has a very low turns ratio as it steps from 16 ohms down to 4,3 and 2 ohms. Its a nice problem solver when trying to get a tube amp like a small OTL to drive low impedance speakers. Its also very helpful w... | |
| How am I frying all my amps? Oscillating? Help Leoturetsky, OK- I'm convinced that the RF is not from a radio station or the like. In your testing above, was the digital system plugged into the wall even though it was not connected to the amp?I would indeed try a set of zip cord or similar spe... | |
| Tube smell? There was probably something deposited on the glass. I have seen this with NOS tubes many times. If I were you I would pull the tubes and wash them carefully so that the glass is squeaky clean. Use only the slightest amount of dish soap. Avoid get... | |
| How am I frying all my amps? Oscillating? Help Leoturetsky, I am surprised that the term 'RF' has not arisen before now! You are describing classic RF interference issues. I doubt very much that the Goertz cable is responsible for oscillation in three different amps. A speaker cable that can c... | |
| How do autotransformers affect sound? what you're describing is simply the tendency of certain topologies to present non-linear loads to their preceding stages. If this is the case, then how is this substantially different than a tube output stage running in class A2 or AB2 whereby gr... | |
| Tube Pre-amp BAT, ARC, EAR, Sonic Frontiers Snarkonmars, what I meant was that some products have an XLR connection when the internal circuitry is single-ended. There is no advantage to the connector; the advantage lies in the topography.BTW any balanced preamp will convert a single-ended s... | |
| How do autotransformers affect sound? The turns ratio of the Mac autoformers, like the ZERO and our Z-Music autoformer before it, are all very low. The result is low distributed capacitance and lower than normal inductances, resulting in bandwidth that is likely to exceed that of the ... | |
| How do autotransformers affect sound? Its a fact that when you ask a transistor amp to make more current (drive a lower impedance) there is an associated degradation that has to do with a capacitance multiplication that is occurring within the output devices themselves. This causes th... | |
| Tube Pre-amp BAT, ARC, EAR, Sonic Frontiers What is the advantage of fully balanced preamp then?Balanced (hopefully differential as well) circuits have the advantage of increased power supply noise rejection and often a considerable ability to reject hum when directly subjected to hum field... | |
| Which amps have 2 sets binding posts per channel the Atma-Sphere MA-3... | |
| Using Theremin near tube equipment::any danger? No worries- tube equipment will be fine with it. Have fun!! | |
| Balanced vs. unbalanced If you have a differential input with any kind of decent Common Mode Rejection Ratio, the input transformer is really just a formality, serving nicely to limit RF input, which can wreck havoc on class D systems. In most solid state and vacuum-tube... | |
| Noise upon pre-amp tube replacement Did you have the amplifier on while you were replacing the tubes in the preamp? The thump could have been the preamp warming up, if so then there are no worries- just make sure you turn the preamp on before the power amp(s). |