almarg
Responses from almarg
| Replace 12AU7 with 6SN7 ? Ghostrider, just saw your post. Great minds think alike!Regards,-- Al | |
| Replace 12AU7 with 6SN7 ? Yogi and Mofi, yes, the 12 and the 6 are the filament voltages that the tubes are designed to be operated with. Obviously, applying 12 volts to a 6 volt filament would result in pyrotechnics.Looking at a tube manual I have, though, I see that the ... | |
| rushton Good thread idea, Rush. In my case:Saul Marantz, Sid Smith -- MarantzJohn Curl, Tom Colangelo, Mark Levinson -- Mark Levinson Audio SystemsKevin Hayes -- VACLou Hinkley -- Daedalus AudioDave Fletcher, Rodney Herman, Bob Becker -- SOTA IndustriesJi... | |
| Tube preamp for SS amp Depending on your budget you may want to consider the Atma-Sphere preamps, which btw include (I believe optionally) what is by all accounts that I have seen an excellent built-in high gain phono stage. My understanding is that they would have no p... | |
| Something doesn't seem right about this... Hi ZD,I agree completely with all of the comments Kijanki provided, as I usually do. (My response was narrowly focused on interaction between the signal currents flowing in the two conductors, which appeared to be what the OP was asking about). An... | |
| Something doesn't seem right about this... If these wires are next to each other, the incoming signal (+) will be affected by the outgoing (-) won't it?Yes, it will. The result of that will be a reduction in inductance, which is generally a good thing.As described in this Wikipedia writeup... | |
| The future of preamps 12-24-13: AudiolabyrinthI have a problem with 32 volts out-put, although Ralph has gain controls outside of the signal, I want to know if that is a control to the output volts, My amp is fully driven at 3.58 volts!, clipping is 18 volts, an explos... | |
| Intractable Problem Lots of good thoughts by the others above. Like several of them, I too am not clear on a number of things, especially whether you have performed the usual troubleshooting procedure for problems that affect a single channel. Namely interchanging co... | |
| Impedance mismatch question Hi Charles,Yes. In general I'd expect output impedance variation as a function of frequency to be much smaller in the case of a tube preamp having a transformer coupled output than in the case of a tube preamp having a capacitor coupled output. As... | |
| Impedance mismatch question Thanks, Georgelofi. As I said earlier, not meeting the 10x guideline (properly defined as described in my post) does not necessarily mean that there will be a problem. But meeting that guideline assures that there won't be a problem.And as I'm sur... | |
| Impedance mismatch question Re George's comment, it should be noted that his Lightspeed is a passive resistance-based device. As such it will have minimal if any variation of its output impedance as a function of frequency, especially if it is driven by a source having low o... | |
| Impedance mismatch question Preamp output impedances are most often specified on the basis of a mid-range frequency, such as 1 kHz. They may be quite different from that value at some other frequencies. For example, it is common for tube preamps to have a coupling capacitor ... | |
| Impedance Matching Stickman, often (although not always) the number provided in specifications of balanced input impedances represents the sum of the input impedances of the two input signal "legs." An RCA-to-XLR adapter routes the signal on the center conductor of ... | |
| More turntable set up problems The sound coming out of my speakers is awful.....lots and lots of distortion, sounds like a transistor radio turned all the way up, if you know what I mean (if you are old enough to have been around transistor radios, lol,) hissy and garbled, real... | |
| The future of preamps In his post dated 3-22-13 in this thread Ralph provided what I consider to be both a uniquely excellent explanation and an extremely persuasive proof of his contention that a balanced interface MEETING CERTAIN DESIGN CRITERIA (which unfortunately ... |