atmasphere
Responses from atmasphere
| Vibrating Woofer, old tubes? You have bad filter capacitors in the power supply. This condition is called 'motorboating' and can be affected by temperature and the length of time that the unit is one.It is something that needs service! I would not operate this unit until this... | |
| Suitable tube preamp for pass labs x250 Tvad, the output impedance of the MP-1 is closer to 30 ohms, not 350. Its bandwidth is unaffected by load. | |
| To bias or not to bias If you are adjusting the bias more than once every 6 months I would regard that as 'tweaky':) Seriously, the tubes should be able to hold up that long without adjustment. | |
| Can You Live With Crackling & Popping Noise? One way that is not obvious to reduce ticks and pops is to use a tube phono section that uses passive RIAA equalization. Transistor units will often over-react to ticks and pops as most of them use loop feedback for the EQ. Loop feedback enhances ... | |
| The Richard Clark "all amps sounds the same" test Lightminer, here is something else to consider:http://www.atma-sphere.com/papers/paradigm_paper2.htmlIOW, a speaker that is designed for transistors may not work with tubes without tonal anomalies, and I for one (if doing the test) would insist on... | |
| Why manufactures don´t burn in their amps and ... Magfan and Al, you want to keep in mind that the power surges are the ones where the power supply rectifiers commutate (that is to say they turn off and on) at the peaks of the AC waveform. As soon as the AC waveform drops below the value where th... | |
| Why manufactures don´t burn in their amps and ... A voltage drop on the power cord is caused by two things: the gauge of the wire and the quality of the connections.If your power cord is heating up at the connectors, here is an example of why things like the Porterport or medical-grade connectors... | |
| Does Pass Aleph 3 heat up the room like tube amp? my experience has been that if you choose a system based on the heat that it makes (or doesn't), the sound will reflect that.If the heat issue is really that bad, look into class D amps.There are probably other alternatives though. You could vent ... | |
| Why manufactures don´t burn in their amps and ... For those who wonder how a power cord can make a difference, consider this: an amplifier has a power transformer, rectifiers and filter capacitors in its power supply. Normally, the filter caps are charged by the rectifiers as the transformer make... | |
| Unbalanced pre out to balanced amp in The specs call for a source impedance maximum of 2Kohms. There are a lot of preamps that can do that, although some of them may have trouble making bass.IMO/IME, you are better off with a step-down transformer, maybe 10K to 600 ohms. You loose som... | |
| TriPlanar Tips Nandric, seems to me I got 3 weights also. Have you contacted Triplanar about this? | |
| Unbalanced pre out to balanced amp in By 'across' , I mean in parallel with the output.If the input of the xformer is supposed to be 20K and the output 600ohms, then the xformer will express 20K to the input if there is a 600 ohm resistance across the secondary.Its the same idea that ... | |
| TriPlanar Tips Lewm, we asked ourselves exactly the same question! That was 5 years ago though....I talked to Tri today- he is still trying to get things back to 'normal' :) got a think or two coming he does | |
| Where are you buying new vinyl? In the Twin Cities, I get most of my stuff at Cheapo Records.When in Denver, I always stop at the Black and Read in Arvada. Wax Trax has yielded some awesome stuff too.Tucson has a great store, PDQWhen my band played a show in Chicago a couple of ... | |
| Unbalanced pre out to balanced amp in From the data sheet, a fairly wide range of impedances is shown for the load, but they also show that the output impedance of the transformer is 80 ohms. There is a rule of thumb that suggests that the load would be about 800 ohm (IOW 10X the outp... |