atmasphere
Responses from atmasphere
| Have Passive Preamps Finally Come of Age? ^^ You are correct about that. Redbook has most DACs too much voltage for most amps made. | |
| MAC Autoformers? The Class A3 amp sounded good too. The pot is not dual but single with a switch attached, thus the click into the high damping condition which cuts out all the Zmatic circuitry resistor losses. It is indeed a combination of voltage and current ... | |
| Do electrolytic caps need burn in? @manthikIf the caps needing to form up is what is happening, leaving the caps charged is the best way to do it. Cycling it takes longer- weeks or months instead of days. @jb0194If new caps in a PSU, will the temporary inefficiency manifest as pos... | |
| MAC Autoformers? Speaker manufacturers are not so honest about their impedance range and a curve is the only way to know. If they didn’t do so many tricks in the crossover we would not have this problem. The drivers are not the problem, the crossover is.In my expe... | |
| MAC Autoformers? If you have the tubes tested in a rigorous manner as Roger does, it makes sense that they would hold up better :) It *also* makes a difference that they are mil spec- that might even be the bigger difference! That does not seem like the sort of t... | |
| Tri-Planar Vll "SE Upgrade" Raul, do you know what a security clearance is?In a case like this it means that the person or company with the clearance cannot divulge information by law. | |
| Do electrolytic caps need burn in? Electrolytics don't have a burn in time so much as they 'form up'. That can take a while, until formed the cap will be less efficient. Give it some time. | |
| MAC Autoformers? The thing that concerns me about 6AS7s, it that they emit cathode sparks in my Tektronix 530 curver tracer at zero grid.That is consistant with your statement of cathode coating failure as it appears the sparks are bits of cathode coating. They... | |
| Autoformers, The Benefits in matching amp to speaker A friend of mine had powered Acoustats; he got frustrated with them and handed the amps off to me wherein I renovated it and installed a tube input stage. It worked pretty well- the original opamp circuit just didn't seem up to the task. Very nice... | |
| MAC Autoformers? I know of no tube amp designer who uses SPICE. can you name a few?Nope. Maybe one? I know I don't! Victor Khomenko was trying to model our MA-1 in Spice many years ago before he became part of BAT. He called me up saying that the amp didn't run i... | |
| I need your help. I have an ARC Ref 3, ARC 110, Vandersteen 5As, but no turntable. Regarding the phono section:A good phono section will reduce the number of ticks and pops you hear without curtailing bandwidth.An excellent turntable to consider is the Technics SL1200G. IMO its weakness is its arm, but its arm is competitive wit... | |
| Tri-Planar Vll "SE Upgrade" I have the feeling that when raul is talking about 'lies' he is talking about me; just for the record nothing I've posted on this or other threads about tone arm or LP performance is untrue. Generally, if I don't know the answer I stay silent. If ... | |
| Autoformers, The Benefits in matching amp to speaker "An Autoformer or any transformer cannot fix a difficult load and only affects stability in a poorly designed, on the edge amplifier." @georgehifi That quote is taken out of context but despite that it still appears to be that you have missed the... | |
| MAC Autoformers? If Ralph (Atmasphere) picks this post up, ... what is the tube life is in your amps. Btw Ralph, …. Roger mentioned a couple of times that negative feedback, *if used properly*, is not all that bad a design feature. Not taking a position, just... | |
| Autoformers, The Benefits in matching amp to speaker So why did you stop making the Autoformers?Paul Speltz came out with the ZEROs. I think our device was better in some ways- it was EI core rather than toroid, and it had 1 ohm taps! But the ZERO proved easier to explain and since that wasn't our m... |