almarg
Responses from almarg
| Telephones for Audiophiles? My Motorola E815 on Verizon isn't too bad. But I still prefer to use the landline for important calls.A little OT: My pet peeve is answering machines. I've been through many, selecting them based on user comments I've seen, and looking for the bes... | |
| How to go from RCA to XLR? A couple of further thoughts. It will be important to make the two channels as identical as possible, meaning identical tubes, identical bias settings, etc. Otherwise the positive and negative parts of the waveforms will be treated asymmetrically,... | |
| How to go from RCA to XLR? Yes, well as far as I can tell I think you'll succeed in both respects, if you install an xlr jack connected as I described, and connect the speaker between the + outputs as I described and not as the manual describes.Good luck with it!-- Al | |
| How to go from RCA to XLR? What the manual describes is not differential and is not balanced. It just converts the amplifier to mono by paralleling up the channels, resulting in a single-ended amp with twice the power.-- Al | |
| How to go from RCA to XLR? That sounds ok to me at the output side. The speaker would be connected between the two positive output terminals of the amp (I think, although I'm not certain offhand, that you would want to use the 16 ohm taps if you have 8 ohm speakers), and th... | |
| How to go from RCA to XLR? Hi Rww -- I'm having difficulty envisioning how that would work at all. What would the output configuration be, in terms of how the speakers are hooked up? And what would generate the inverted input signal?Regards,-- Al | |
| Preamp gain question I looked at the specs at the CJ site, and output voltage range is not specified. Oh, well. But it's interesting to note that in the PV10A they reduced the overall gain by 13.5db, relative to the PV10.Regards,-- Al | |
| Preamp gain question Photon46- what would be an ideal amp/preamp gain be? Are you saying that they should be more closely matched?I think he's just saying that the overall system gain of 110db in phono mode is simply too high, particularly for a high output cartridge ... | |
| Preamp gain question Ouch! 80db of gain in the preamp, with a 6.5mv cartridge. I wonder if 10db attenuators will be enough to get the volume control into the optimal part of its range, where resolution is good, and perhaps even into the part of its range over which it... | |
| 60 Cycle hum and HumX I looked at the HumX descriptions on the Ebtech site, and it's not clear to me what its design is internally. The product description just talks vaguely about filtering the ground line.That said, I can't envision any way in which it could be hurti... | |
| How to go from RCA to XLR? Rww -- I get your drift; touche! :)But the op should note in the reference that he can get a great deal of noise rejection just with the cabling arrangement that Whitlock describes (his diagram labelled "correct" on page 29), without the expense a... | |
| CD player connected directly to Amplifier? I suspect that Stan is referring to inclusion of a volume control in the player, not to the design of its output stage.Regards,-- Al | |
| How to go from RCA to XLR? See pages 28 and 29 of the following paper for a description of how to feed a single-ended signal into a balanced input without major degradion of noise performance. My thanks to Shadorne for calling this paper to my attention.http://www.jensen-tr... | |
| Basic electrical questions. Zargon -- I did not perceive any contradictions along the lines you describe when I read Hansen's article. First, although this is not inconsistent with anything you said in your last post, let me say that I don't think his paper addresses at all ... | |
| Basic electrical questions. Shadorne and Jea48 -- I went through the Bill Whitlock paper and presentation you linked to -- really super!!! He's absolutely right when he says these issues are not adequately addressed (or addressed at all) in EE curricula, and even EE's often ... |