lewm
Responses from lewm
| SUT - electrical theory and practical experience "Are there any inherent weaknesses in a SUT versus a transistor, or vice versa?" If I didn't know you were serious, I would suspect you of being a troll based on this sentence. The question has already been broached here in this thread. Elsewhe... | |
| SUT - electrical theory and practical experience "One practical consideration is you really need a very short, low capacitance run of cable from SUT to phono stage." Which is a good reason for having a high quality SUT built in to the phono circuit, on board. | |
| SUT - electrical theory and practical experience Raul, By "passive", I only mean that it does not require or consume external power. OK? You can use any other definition you want. | |
| SUT - electrical theory and practical experience Of course to alter AC line voltage a step down transformer of the kind you own must be inserted into the AC line. That’s precisely analogous to inserting a SUT between a cartridge and an MM phono stage in order for it to do its work. Both are pass... | |
| SUT - electrical theory and practical experience Elliot, in operating principle there is absolutely no difference between your step down transformer and a SUT. The functional difference is only in the respective turns ratios, and also the fact that a SUT has to handle a wide bandwidth whereas th... | |
| Stylus skipping at beginning of record When you do get help, maybe ask the guy to teach you how to set VTF, antiskate, VTA, etc, using your tonearm. As to VTF, most makers publish a range of acceptable values for each cartridge. Look that up. If you’re within the recommended range, I d... | |
| SUT - electrical theory and practical experience Holmz, please read my long post and Larry’s too, near the top of this thread. Of course transformers transform both voltage and current in direct proportion. The product of volts X current on the primary equals the product of volts X current on th... | |
| SUT - electrical theory and practical experience Which is to say a good SUT is preferable to a mediocre SUT, on the assumption that built in SUTs are mediocre. But what about Allnic and a few others with very high quality built in SUTs? The advantages there include fewer connectors and ICs. | |
| Simplest Linear PSU? Although I definitely do not agree that SMD are categorically to be avoided at all costs, nevertheless it occurred to me that for those obsessed with avoiding SMDs, I would go along with a recommendation I think made by someone else to look on Eba... | |
| Simplest Linear PSU? Charles, like Mijo, I’ve never had occasion to shop outboard power supplies of any type. | |
| SUT - electrical theory and practical experience "euphonic coloration". Which is to say you believe SUTs introduce a coloration. Which is one subject of that eternal debate I mentioned. I personally have never owned a SUT. | |
| Simplest Linear PSU? I think the reason many people report audible benefits from LPSs vs SMPSs is that they have upgraded from a wall wart quality (i.e., low quality) SMPS to a high quality LPS designed for audio. David Berning has been implementing SMPS power supplie... | |
| SUT - electrical theory and practical experience Like Eric says, a transformer is a device that transforms the voltage to current ratio of a power source, in either direction, where Power, which is a product of voltage times current, is a constant. So when V goes up, current (I) must go down in ... | |
| Source for resistors for an acoustech/sutherland phono preamp Nude Vishays took over from the ones that are potted. These days Texas Instruments is the US source for what look like nude Vishay, series TX2575, at about $12 each. Caddock TF020 from M Percy sound just as good for more like $5 each, but the form... | |
| System that sounds so real it is easy to mistaken it is not live As a 25 year user of an Atmasphere OTL, I can tell you that with these amps a failing tube signals its demise rather gently. But keeping them in open air for ventilation and in plain sight is a good idea. |