kirkus
Responses from kirkus
| Using non-matching caps in McIntosh 2125 repair? Or will it destroy amp/burn down house? Hello, sorry I've been away . . . I was under the impression that you'd replaced the two 2200uF caps per gs5556's advice, but in skimming through again I'm not certain now. BTW your choice of diodes is fine, provided they're not counterfeit or an... | |
| Using non-matching caps in McIntosh 2125 repair? Or will it destroy amp/burn down house? Functionally, two 2200uF caps (C307/C308) and D302/303 is that of a half-wave voltage-doubler negative supply. It's fed by the ground-referenced 5.6VAC that runs the bulbs, and produces (about) a -12v output. To do this, C307 is charged on the p... | |
| Using non-matching caps in McIntosh 2125 repair? Or will it destroy amp/burn down house? I see several problems here:- You cannot replace the 2200uF capacitors with 0.22uF capacitors - the amplifier certainly will NOT appreciate a change of value (four orders of magnitude!) to this degree.- The diodes near these caps (D302, D303) are ... | |
| Dual Differential / Balanced? Speaking of Bill Whitlock, since the interface-related noise that is being discussed may in many cases be caused or contributed to by ground loop effects, you'll probably find pages 31 through 35 of this paper to be of interest. To whet your inte... | |
| Dual Differential / Balanced? There appears to be quite a bit of overlap in this discussion between the role of balanced equipment interconnections, and circuit topologies that use differential signal paths. This is actually quite understandable -- when one observes many of t... | |
| Tonearm recommendation I respect your opinion and I never mounted my same cartridge sample by B&O in the STAX but I did it in at least other 4-5 arms and always with a degraded sound quality level against the same cartridge mounted directly in a universal headshel... | |
| Tonearm recommendation Hello all - Chakster mentioned the Stax UA-7, which I'm currently using with a handful of different cartridges whilst mounted on a TD-124. It's geometry is a bit unusual, putting the inner null point substantially inside even the Stevenson soluti... | |
| SPL - Pro Audio Blasphemy? I've personally no evidence that the professional audio market is any less susceptible to changing vogue or irrational expressions of machismo than the high-end consumer market. This fashion of escalating rail voltages has been evolving over at le... | |
| JBL 4425 or Yamaha NS-1000 ? pls vote I think with some of these opinions there may be some confusion on the JBL model numbers - the 4425 is a two-way time-aligned studio monitor with a big "butt-cheek" constant-directivity horn. It has virtually nothing in common sonically with the e... | |
| List of Audio Tube Measured Noise Performance Hi Scott - I applaud your efforts on the start of a very interesting and relevant project. I thought I'd just bring to the attention of interested readers an AES paper I saw a while ago on this very subject, by Merlin Blencowe of AMS-Neve:http://w... | |
| Did Redbook get it right? Way back in the early 80's, that was the story that was being told and there was a lot of screaming about how the 44.1khz rate was a big compromise.IIRC the origin of 44.1KHz had to do with the fact that digital masters were sent to the pressing p... | |
| Advantage of Balanced over RCA for phono cables Kurt is correct . . . except for some very rare instances, a phono cartridge is always wired as a balanced connection - it can be thought of as a transformer with a mechanical (rather than electrical) primary. And given the ratio of a cartridge's ... | |
| Refurbish a Dynaco St70 Atmasphere is spot-on with his recommendations - these are wonderful little amps; well worth rebuilding, and best left in stock form. I've rebuilt a pile of them over more than a couple of decades, including some that were brought to me with vario... | |
| LCR phono stages we know about I designed and built a handful of inductor-based phono stages about fifteen years ago, both tube and solid-state. I used pre-made LCR networks from Tango and S&B (both now out of production), and a couple of LCR and LR networks of my own desig... | |
| The Arm/Cartridge Matching Myth Thank you all for the kind words, and thank you Al for correcting my sloppy math . . . On the issue of acoustic feedback, I'd just like to add that it rarely occurs at the tonearm/cartridge main resonance point, simply because it takes a speaker w... |