I recently tried the Audio Note Niobium 1W resistors in my preamp. I put them in the inputs of the signal path, before the gain stage, in place of TX 2575 (naked Vishay Z-foils). I'm a big fan of the Z-foils, but using too many is a little bit too much of a good thing. Over time, I noticed the...
I bought a D-10X and it's burned in now for 350 hours or so. It's a really special component, almost magical at times.
The purity of tone and its rendering of a sense of presence are it's 2 outstanding qualities. Yes, there are oodles of leading edge details that support the feeling of "being...
tima: I just wanted to thank you again for all the countless hours of research and experimentation work you've done, and shared, on cleaning records. This information has been a wonderful gift to me and to anyone who cares about great sound, and preserving their record collection!
Good choice. Like others have suggested, I'd stick with original replacements. As Marty says, ratings of +/- 20% are typical. I'm not sure I'd replace the cabling if you liked how it sounded originally.
I have an hybrid amp with a 160,000 uF BG power supply - it's sublime. However, even if...
Thank you , Marty. I haven't listened to much classical music lately, but this brought me to tears. I watched it because I'll be seeing Yuja Wang this week in Philadelphia and wanted to hear Rachmaninoff. This will be interesting.
Having a large channel volume difference will have an obvious fix if you have patience and diagnose systematically. It's worth learning these skills. Take the advice already offered and then go to the tech. Find out what gets fixed and what may have caused it so you can deal with it if it...
I'll say! For example, with a room temperature ranging in low 70s, and a warm-up of about an hour, my TW Acustic Raven Anniversary with 3-motor pod has a typical speed variation of +/- .003 revolutions at 33.333 over 30 seconds as measured by the Phoenix Engineering Road Runner tach. I think...
The XP-20 I owned had the lowest noise of any preamp I ever heard by a wide margin - really great listening at low volumes.
I'll be interested in what you learn, Steve!
Add my name to your list of those that find the Tabulus Argentus DB-25 cables a great upgrade. I bought a pair of the 2 meter cables for my Pass Labs XVR-1 3way active crossover (2 power supplies). The XO has been powered up continuously for 6 weeks, and I have maybe 75 hours of active...
I ordered a pair of the Tabulus DB-25s based on this thread for my very heavily modified Pass Labs XVR-1 3way crossover with 2 power supplies and will let you know how it goes. Stay tuned....
Thanks ayreman for sharing your journey!
Few are likely to undertake your trip, but if they want a little more magic from their REF40, REF10 Pre, or REF10 Phono with just a few parts changes, they might try swapping in the the Vishay Z-foil/TX 2575s for some of the stock resistors.
Start with...
There is something vaguely resembling an SA-4 schematic over at diyAudio in the thread here:
https://www.diyaudio.com/forums/tubes-valves/279078-counterpoint-sa4-otl.html I also see a service manual for the SA-4 on WorthPoint.com but don't know what they're charging for it.
You might also try...
Interesting thread. Everyone seems to have their own experience and opinions, as expected. I've been modifying equipment for 50 years and have spent way, way more on parts than what a REF 40 retailed for, $8K on one recent project alone. I can really relate most to everything that Marty says...
I really like this mat on my solid copper platter TW Acoustic Anniversary! Very balanced sound, doesn't ring and is not overdamped. I believe it's coated aluminum.
You can't use an emissions tester to match tubes. There are also a few reasons why a mutual conductance tester may not be very good at it either including calibration issues, accuracy, and test voltage limitations to name a few.
To understand the difference between an emissions, dynamic...
Pretty amazing story. I am very happy you got your bike back Ralph. I know what it must mean to you!
A little off topic, but thanks for the reference on bikeindex.org for bike registrations. My Richard Sachs was built by one of the all-time great steel frame builders, and is not replaceable...
That's great speed stability. I have a TW Acustic Raven Anniversary (belt drive) with the 3 DC motor (single unit) hooked up to a Roadrunner speed tachometer. It's a somewhat higher mass design than the BB. I do notice more speed variability until the turntable runs for a half hour or so. The...
Jazzer: For Rectifier tubes in both the SA_5000 and SA-220 the best by far is the RFT EZ80 from Germany. They're about $20 each. I don't have any recommendations for the other tubes as my NP220 takes a different input tube than the 6DJ8/ 6992 tubes yours uses.
This is a shot in the dark since Alta Vista Audio (Counterpoint) has been out of business for over 8 years, but you may want to try contacting Plitron directly as they may still have the part numbers somewhere. They would begin with AVA (Alta Vista Audio). Try:
Anna Perruccio
CSR Ext. 234...
The Tuner Information Center (TIC) has the most comprehensive information on vintage FM tuners of any site on the web. The panel of experts has some of the best technical people in the business and includes people who've owned, repaired, and modified hundreds of tuners. It even has a review...
No experience with Mundorfs. They get some good reviews over on diyAudio which is where I'd research. I used the AN Kaisei in the signal path, in a low voltage application, NOT in a power supply. There, I found them warm, liquid, a little "oily" sounding, and somewhat bass-shy. It's possible...
Texas Components, the US manufacturer of Z-foil resistors, shows values of 10 to 100K ohms. The voltage rating is 200V and .4watt. They will make custom values for you and you can inquire about that on their US website. Despite having ordered and used a few hundred (they actually emailed me...