atmasphere
Responses from atmasphere
| Does anyone care to ask an amplifier designer a technical question? My door is open. I feel one of the great benefits of tube products is the limited bandwidth eliminates susceptibility to much of the higher frequency ac noise. Comments?You can have plenty of bandwidth and not have noise problems. Noise is best handled by proper... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Some products allow the music to communicate to you, some don’t, and a combination of components may speak to me, but not to you. I know this isn’t a technical question, but I felt compelled to write it nevertheless. Dr Herbert Melcher showed t... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Also, while I don’t recall the exact numbers, Ralph has stated in some past threads that he has observed remarkably high levels of energy emanating from LOMC cartridges at ultrasonic or RF frequencies.@almargThe Hagerman site shows a 30db(!) pea... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. (although I am unclear if the phone company developed the standard which I have heard referred to as the 600 ohm standard).The 600 ohm aspect has to do with the spacing of the lines on telephone poles. You've seen them many times - that spacing ca... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. I read both links. The first is common knowledge and nothing about RF. The second is long so if there is something in particular you want to me to read please quote it here. Are we playing "Wack A Mole’ here?Im really tired of RF being the devil f... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. What can I expect to pay for a recap (plus any normal servicing)? I can actually drop off the amp at Krell myself (they are an hour or so away).While it might be old enough that some of the filter capacitors could be getting near failure, that is... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Please explain. Im all ears.Actually Roger, I did that earlier. You must not have read the post?The loading is for the benefit of the preamp, if its sensitive to RFI. If not, no loading is needed. IOW if you need loading to deal with brightness, t... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. I think microphonics can sound euphonic. I built a Bottlehead be pre-and while it was fantastic the tubes in that application were very microphonic. It lends everything a rounder more robust sound as it’s like a delayed Feedback. That's a new o... | |
| inherent design flaws with a 3 way, 15" / 8" / horn (large tower) speaker? The Classic Audio Loudspeaker models T-1 and T-3 seem to be set up this way. They sound great- one of the most transparent and musical speakers I've heard. | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Thanks.I didn't totally follow all that, but that's due to my level of ignorance. @prof Don't feel bad. A lot of designers don't get it either!Good question. Cartridges are very different in how they respond to loading. My Denon 103 is a 14 ohm ... | |
| What separate tube phono stage do you use ? 76db gain tube phono stage and no noise ? Very impressive.Ralph, what do you think ? How did he manage that ?Oh there's noise alright. All phono sections have noise.Its likely using a step-up transformer. Its very easy to get low noise and high ga... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. What is the role and importance of significantly upgraded power cords in component design? It seems to me that the PC is a fundamental part of the electronic device and that the manufacturer should optimize the cord for the device in building i... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. I’m sure you misspoke when you referred to pi-squared. The 6.28 factor you referred to is of course correct, but that is 2 x pi, not pi-squaredYup- thanks for that. My medication is a bit too powerful today...It adds better isolation on high freq... | |
| Joule-Electra VZN OTL Users- I Need advice! Do you recommend to keep voltage at 65 and slightly bias low (say 26?) As far as keeping the amp in standby, aren't the little tubes more sensitive to powering cycle than to staying on at minimum power "standby"?Yes to the first- try it and see... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Hi Ralph. Im curious if you use an inverse RIAA network to check your EQ. If so where did you get the values? I built mine from the advice of Peter Moncrieff, Mitch Cotter and Dick Sequerra who were the first to discover that many RIAA EQ curves w... |