ramtubes
Responses from ramtubes
| Does anyone care to ask an amplifier designer a technical question? My door is open. I made a few Zero Feedback amps in the 1970s, Still have one, perhaps I should dust it off and have a listen. Like Charlie I maintained the big 3 targets. If you don't you will have created an amplifier that is very speaker dependent. | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @ptss @ OP. How do you feel about Spectral Audio designing amps with extreme bandwidth? Are there benefits for solid state amps? When I went to Vegas in 1978 Spectral was playing B&W video through their line stage. The volume control thus b... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @krelldreams I’d like to add this: I appreciate the fact that there are two professionals contributing here, despite the fact that there is tension that’s been created by disagreement. I’m trying to read through the commentary to the points bein... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @fsonicsmith I think you are mistaken. I don't recall ever entering into any debate of any kind let alone some type of trolling-skirmish with you. IMO, you are once again confused. Let me ask you this Roger; other than one of Ralph's amps, which... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @krelldreams What prompted my question regarding tube types was the discussion in this thread about 6sn7/12au7/6sl7/5751/12ax7 tube type use for preamps and amp inputs. But there is also the question of power output tube choices - el34/6550/kt88/k... | |
| Running Benchmark AHB2 in bridged mode and 4 Ohm Speaker I am amazed this has not been answered and laid to rest. What seems to be the problem? The 29 amps will only be supplied by the amplifier if the load resistance is low and the voltage is high enough to produce that current. Perhaps its the order o... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @fsonicsmith Ralph-you should never have entered this thread. You tried to kill the OP with kindness and camaraderie, and he spit on you every chance he got. I think most of us reading through this thread can see the OP for what he is; entrenched... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Here is a great example of what I consider the proper use of 6SN7 and 6SL7. Note all the preamp and phase inverter are SLs. Interestingly the SN is used as a push pull output tube... So cool. Its worth reading some of the thread.https://music-elec... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @oldtecg05 Whose thread is this? I thought it was mine. I dont mind a bit of controversy as long as its Gentlemanly and with some sense of humor. Its the sense humor that I find lacking. | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Power is equal to volts times amps and is also equal (thru Ohm's Law) to current (squared) times Ohms.In this case, to make 100 watts into 8 ohms, you divide 100 by 8 and take the square root, which is about 3.4 amps. That's all thats needed to ... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @atmasphere It is in no way an excuse for bad specs- and in fact our amps have some pretty good specs (if proper measurement technique is used, which means **don’t ground a speaker terminal during testing**, which is the mistake that almost everyo... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @tomic601 thanks for awesome thread Rogeri got to page 27 of the Williams book and he says “ but as you learned in your AC theory course... “so....now what book do I need ? Dont answer, I will figure it out...Tektronix scope is on order...@$&a... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @fleschler Maybe microphonics are not an issue with cathode followers. I just don’t understand VAC using only 6SN7s in all their current amplifiers if they are worse than 6SL7s. VAC is likely using them because thats what the current customer bas... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Here is the best data I found for the 6H30. The curves look right and the table of parameters done at different plate voltages and currents are very interesting. The first 3 columns are his set up values and the rest are the results. http://www.t... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @atmasphere Roger, you might want to do some reading at the links I posted in my prior post. Most of this post (except perhaps the comments about subjective listening) is incorrect. As I pointed out earlier, the load is not for the cartridge's ... |