intactaudio
Responses from intactaudio
| So when is a SUT really needed? Yes, the back emf opposes the motion of the cartridge, but it's very small compared to the generated voltage- which is due to the conversion of mechanical energy to electrical energy as described above- and essentially can be ignored in calculati... | |
| Recommandation for 1:6 1:8 SUT under $5K? @arazmj A quick relatively inexpensive thing to try would be to get a pair of RCA spliiters, some screw terminal RCA plugs and a carbon film resistor kit. This will allow you to quickly and easily play with loading the primary of your S1. The ... | |
| Recommandation for 1:6 1:8 SUT under $5K? @lewm I am 100% against loading transformers on the secondary in any case where it is not needed (ie an output transformer driving a speaker). In the case of a SUT I find the best results from replacing the 47kΩ on the secondary with a larger v... | |
| Recommandation for 1:6 1:8 SUT under $5K? Many of the Japanese SUTs (Luxman / AN:Kondo) use severe loading on the transformer to reflect back a small multiple of the internal impedance. This is typically applied to the SUT secondary and could explain this situation. I think the key p... | |
| Recommandation for 1:6 1:8 SUT under $5K? @lewm What you need to know is the turns ratio (in your parlance, the ratio of This most basic detail is the point I am trying to get across. I agree the turns ratio is the key factor and what you need to use to compute impedances and g... | |
| Recommandation for 1:6 1:8 SUT under $5K? @billstevenson Why do I feel Like I am having a discussion with chat GPT? IF the GAIN is a hard fact, how can it be different, 20.68x is 20.68x is it not? By definition, Gain is the difference between the input and output and takes into cons... | |
| Step up transformer I have used pots on transformers and they function electrically as expected. The 1kΩ value you mention is fine for loading a cartridge directly (across the primary of the SUT). If the desire is to load the secondary, then a much larger value wou... | |
| Recommandation for 1:6 1:8 SUT under $5K? @elliottbnewcombjr I'm saying, in SUTs like mine (impedance is not a separate control), the impedance is the result, I call it 'resultant impedance'. In my world, GAIN (shown as a ratio), i.e. 1:20.68 is a shorthand way of saying x-factor of... | |
| Recommandation for 1:6 1:8 SUT under $5K? @elliottbnewcombjr it took me quite a while until I found the actual specifics of gain that occurred at those designated positions for my FRT-4 SUT. Turns ratio and gain (X??) are not the same thing and the two only match when the load impeda... | |
| Recommandation for 1:6 1:8 SUT under $5K? @billstevenson I encourage watching the video I did... doesn't really explain what is actually going on. It seems the "transimpedance" term is used to indicate the input impedance is tied to and inversely related to gain. This is a non-tra... | |
| Recommandation for 1:6 1:8 SUT under $5K? @elliottbnewcombjr INVERSE Relationship By transimpedance, I presume they are referring to current mode, ie to attempt to load the cartridge with a dead short to maximize and amplify the current generated by the cartridge. An adjustable 40Ω-... | |
| Recommandation for 1:6 1:8 SUT under $5K? How is the above pictured device a transimpedance amplifier with an adjustable input impedance from 300Ω to 40Ω? I do agree with Lew that the OP should let us know what things sound like with the direct input into his phono. Im many case... | |
| Tube Tester It is a bit more $$ but I am a big fan of the µ-tracer. https://www.dos4ever.com/uTracer3/uTracer3_pag0.html dave | |
| Develop a hierarchy for phono playback @dayglow I was referring to XYZ alignment.... X and Y being azimuth and VTA/SRA and Z being Zenith. These are all parameters where the actual tracing facets can substantially differ from the cantilever / coil orientation. @lewm The viv is a... | |
| Develop a hierarchy for phono playback @billstevenson I think you left the most important factor off your list and that is cartridge alignment. It may ruffle some feathers but a properly aligned $500 cartridge will sound better than a casually aligned $5000 cartridge. dave |