atmasphere
Responses from atmasphere
| Does anyone care to ask an amplifier designer a technical question? My door is open. Source output 22R, amp inputs 23k5 or 100K. Adding a preamp with attendant switching, circuitry, noise and additional cables is little more than a subtle tone control. It maybe different, but it may not be better.Some volume controls in DACs are a... | |
| What would be good preamp to run McCormick dna1 The input impedance of the DNA-1 is 100Kohms, which makes it a friendly load for most tube preamps. It only accepts single-ended inputs; @gdnrbob above mentioned our MP-3 (which is a balanced preamp) but I think you could do quite well with our U... | |
| Tubes with Infinity IRS Betas One solution for such an impedance curve is a set of ZEROs (www.zeroimpedance.com) which will put the Betas in the range that most tube amps can handle. | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. why do some amplifier manufactures say to use a preamp between their amplifiers and the streamer when you are only using a streamer and power amp, no vinyl and no other sources. I understand the need for a volume control and to have the impeda... | |
| best place to introduce tubes into circuit What sort of source might you be using? A turntable? | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Well, it turns out that it was my friend Ralph (we have never met, I simply call him my friend) who misspelled Charley's name. He did the measurements of our old M-60 kit for Glass Audio. I met him and hung out back when he was still Avalon Louds... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. I am likely one of a very few designers that actually will repair others equipment. I do this because I like to see others work, how they make things, how their things perform. I have tested over 400 amps and preamps and can tell you all about ... | |
| 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... |