dgarretson
Responses from dgarretson
| Audio Research Reference 3 and BAT spec 6H30 I only have experience comparing NOS 6H30DR to new- production Sovtek 6H30 in a VK75SE. In that amp there is only minor improvement with DR, which diminishes as the tube ages. In my amp a fresh Sovtek surpassed a DR after about 1500 hours of use. ... | |
| Metronome Tech It looks like a fairly standard Amphenol type connector:http://www.alliedelec.com/Catalog/pf.aspx?FN=155.pdf | |
| Capacitor log Mundorf Silver in Oil I wouldn't pay too much attention to that URL. Perhaps the results were application-specific-- who knows what quality of other parts were in his test preamp or what compensations he needed in a filtering cap. I've used Elna Silmic(admittedly origi... | |
| Rain-X as CD Enhancement Treatment This evening I finally spent some time with Rain-X, treating Lee Konitz's fine new "Deep Lee" and Dave Douglas's "Strange Liberation." The Douglas album had previously been treated with CD Stop Light edge treatment. In addition to sounding clearer... | |
| What is the best dielectric? Of the materials typically found in audio cables, natural unbleached cotton is closest to air in dielectric constant. Teflon and polyolefin are good practical alternatives thereafter. Polyolefin heat-shrink tube is stronger than teflon & easie... | |
| Crossover upgrade capacitor question Undertow, yes, thanks for first recommending Claritycap MR & for the tour of your modded Jolida phono stage. | |
| Experience with FREDs in a tube amp PS Generally speaking, the safe thing to do is to select replacement diodes that equal or exceed the rated capacity of the stock bridge. Chances are good that this can be done without using heat sinks, unless the original rectifier uses them.It's def... | |
| Experience with FREDs in a tube amp PS To be safe you might try 1200V/10A Cree SiC Schottkys, but depending on power drawn, they might still need heat sinks. Lower voltage/current diodes may be OK if the amp is equipped with a soft-start thermistor on AC. Dennis Had might offer an opin... | |
| Crossover upgrade capacitor question "Remember that caps used in passive crossover see high voltages and therefore they change shape along with the signal flowing through them - this can add significant distortion in some cases"Both Claritycap MR and Duelund reportedly have design im... | |
| Experience with FREDs in a tube amp PS IME in a high-voltage custom full-wave bridge, Cree SiC Schottky surpasses HEXFRED. For low-voltage/high-current filament supply, a ladder of 50V Schottkys sounds better than FRED. In a manufactured 4-pin bridge, IXYS 600V/6.6A SiC Schottky is rep... | |
| Crossover upgrade capacitor question Hi Bob, I'm curious why you recommend limiting small bypass cap to tweeter. | |
| Neil Young Live at Massey Hall 200 g LP, On this album his chat on top of retunings & guitar riffs drawn from other songs, is part of the poetry. The sound quality of the CD version is top notch, and the close miking is no problem with a solo performance. The story about Old Man is r... | |
| 10 Levels of Turntable Mastery During my long noviciate of acquiring purported TT mastery, every year or so when I rechecked arm/cartridge set-up I found it way out of adjustment. I suspect it was my measurement tools & skills that were improving, rather than shifts in geom... | |
| Top resistors Audiotweak, please post your findings regarding TX2575 vs. TX2352. | |
| Top resistors Clabe, good to hear about your improvements. Prior to switching to fast recovery diodes in the Vel, I was always hunting around with the sub set-up and volume level. Afterwards everything just fell into place.For a cheap and effective mod to SBAM,... |