almarg
Responses from almarg
| matching with Aragon 4004 MKII Thanks, Mofi. Yes, I agree that despite the somewhat low input impedance of the amp, it is very unlikely that there would be an impedance incompatibility with the preamp.To be precise, the rule of thumb guideline of 10:1 or more should be applied ... | |
| tube vs SS preamp Hi Newbee,I agree that a failure of either a tube or solid state preamp can conceivably destroy speakers. DC won't destroy tweeters, though, since the crossover network in the speaker would route it to the lowest frequency driver(s). Unless, that ... | |
| Should I upgrade power cord for my preamp? Based on my limited understanding of how preamps work, it does not seem like it would make a sonic improvement.One way in which it could make a difference is that the shielding it may provide could reduce noise that may couple into the preamp via ... | |
| Phono rig capacitance Dfel, what Jonathan said is of course correct. The cartridge does not see the capacitance on the secondary side of the SUT divided by 100 (the square of the turns ratio we are assuming). Since the SUT transforms impedance in proportion to the squa... | |
| How to test KT33C with Knight 600 Tube Tester ? Well, as I said the settings for the 25A6 should work, and I'd feel pretty confident that they will. But I'm saying that based on the information I cited, and therefore I can't be 100.0% certain.Regards,-- Al | |
| Phono rig capacitance Jonathan, thanks very much for chiming in. Dfel, Jonathan is the designer of Lyra cartridges, so we are privileged to be receiving some exceptionally knowledgeable inputs. He is also the author of the post that I linked to earlier which explained ... | |
| Analyzing the power from the outlet Great inputs from Ralph (Atmasphere), as usual.Gbart, thanks also for calling attention to the papers presenting the many measurements. I haven't taken the time to read most of them yet, but FWIW I would suggest to those who do read them that what... | |
| impedance match of preamp and main amp. Yes, I see a problem with this. As indicated in John Atkinson's measurements of the VK-51se, while its output impedance is 410 ohms across most of the audio band, it rises to 4700 ohms at 20 Hz. That kind of impedance rise at deep bass frequencies... | |
| What happened to Jfox Hey, Grant (Tvad), great to see you back here! Hope all is going well. And do enjoy the top-notch system you worked so hard to develop.PS - I too miss AudioFeil's acerbic wit and high ethics.Same here. As well as his wealth of knowledge and experi... | |
| Analyzing the power from the outlet CJK, a power filter/conditioner puts the incoming AC through a relatively simple circuit which provides some degree of noise reduction. It may also include a provision for surge protection. It does not regenerate power. As can be surmised from t... | |
| Analyzing the power from the outlet But I understood the amplifiers require internal oscillators to operate? Why do you need to add an external oscillator?An oscillator is something that generates a signal. An amplifier is something which boosts some combination of the voltage, curr... | |
| How to test KT33C with Knight 600 Tube Tester ? According to an older Sams Tube Substitution Handbook I have, the 25A6 can be substituted for the KT33. According to references on the web the KT33C is identical to the KT33 except that the KT33C provides a filament center-tap connection on pin 1,... | |
| Phono rig capacitance Dfel, the mathematics that is involved in analyzing RLC circuits is quite complex, and probably beyond the scope of what is practical to discuss in a reasonable timeframe in a forum such as this. However, I think that a careful reading of the "car... | |
| Which high power SET Ait, thanks for the detailed response. Wrm's choice of the word "awesome" is an understatement, if anything :-)I'll add to your comments, relevant to the thread, that the 1.2 ohm output impedance is of course significantly lower than that of more ... | |
| Upgrade advice needed What settings of the DAC's volume control do you typically find yourself using, within its 0 to 70 range? And how have you set "USB minimum volume level" and "USB maximum volume level" in its menus?I'm envisioning that the DAC's volume control fun... |