ramtubes
Responses from ramtubes
| Does anyone care to ask an amplifier designer a technical question? My door is open. @terry9 Idle current diminishes from 1600mA to 1200 mA, in the course of one hour. Rails are +25V and -25V, so dissipation 80W reducing to 60W. Sounds like a nice amp. High idle, reasonable rails. Congrats. Its for more sensible than some 200-... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @blueranger Thanks for your expertise. I have a question about damping. You said a heavy gauge speaker wire would actually decrease damping. So a speaker gauge around 16 might exert more control over the woofers for deeper bass? What I wanted to ... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. I have had many responses, good questions, no Trolls. If I missed your question please re-ask it again. | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Roger, thank you again for your response. My ears have required long warm up times for almost all of the gear I have had over the years. Solid State as well as tubes, dacs, tuners, tape machines, etc. I suppose R. V. knew what I was talking abou... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @cakyol Can you please tell me the purpose of resistors R1 -> R8 in the power supply shown below in the URL ? Is it to reduce the resonant frequency in case the supply oscillates with the stray inductance of the smoothing caps ?https://www.pa... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @stereo5 I have a question for you Roger:What are your thoughts on Class D amps? I have listened to quite a few and always came away unimpressed with my ears aching. I am a Mac guy at heart marrying a Mac solid state amp with a Mac tube preamp. ... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @assetmgrs Roger; How do you feel about the design characteristics of hybrid amps, say with a tube preamp and a solid state power amp like the Rogue Pharaoh? Does this approach offer advantages of both tube and SS, or does it compromise the best o... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @bdp24 Thanks for the balanced info Roger. 4 resistors > transformer! I've been running the RM-200 with a balanced pre-amp, but if connected to an unbalanced source (First Watt B4 x/o), what is your recommended method of converting the RM-200... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @terry9 I was measuring HFE with a handheld, not warm, not at operating current, and only using the result as a first cut to cull outliers.Emitter resistors are 0R1 +/- 0R02, so not much.4 x PNP and 4 x NPN.No VBE multiplier, but then I leave my... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @geek101 Hi Roger, thanks for the great offer. I would like to know what are all the measurable variables does one consider when manufacturing an amplifier.I am guessing this list is most exhaustive then the spec sheet typically posted?. If no... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @rocknss Curious on how you have trained your ears. Time, attention to distortion, frequency response variations, lots of A/B testing... lots of that. I set up one today to use a QUAD 57 to compare a stock with a modified amplifier that has come... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @terry9 I build solid state amplifiers, and like to match output transistors. At first I matched for HFE, then VBE at constant current similar to operating spec. Only later did I realize how much this parameter drifts over the first hour of warm... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @bdp24 Roger, I assume the balanced/XLR-only input on your RM-200 is accomplished with a transformer. Do you wire it in accordance with AES File 48 (pin 1: ground, pin 2: non-inverted signal, pin 3: inverted signal)? Thanks---Eric. Actually it ... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @rego Where do I begin when considering an Amplifiers Characteristics? The first thing people are hearing, whether they believe it or not, is the difference in amplifier output impedance that will affect some speakers more than others. An amplif... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @uberwaltz Now a novice question.i have zero tube amp experience.a lot of my equipment runs xlr connections i have not seen many tube integrated amps sporting xlr inputs.is there a good reason for this? Balanced inputs take a lot of extra stuff... |