Yup. I got my money refunded a long time ago, so if it lands here at some point I'll have to tell the Post Office to come pick it up. It'll be hilarious to see how many years that takes, and I'll most certainly have worn it out by then.
Today's roll. The ST bottle Tung Sol 6J5's (thanks @therremans ) are a pretty big step up from the straight bottle versions. The harmonic detail in the midrange is otherworldly. The Melz is more extended up top and has more punch and dynamics in the upper bass, but the mids from these 6J5's is why we do tubes.
Today's roll. The ST bottle Tung Sol 6J5's (thanks @therremans ) are a pretty big step up from the straight bottle versions. The harmonic detail in the midrange is otherworldly. The Melz is more extended up top and has more punch and dynamics in the upper bass, but the mids from these 6J5's is why we do tubes.
I understand what a matched pair means.. but what is a “platinum matched” pair. It’s seems to be a very common term sellers use, there are pages of listings with that term.
Varies by seller, but a seller I've purchased from in the past states their 'Platinum Matched' means 5% or less variance in measurement between the tubes where 'Matched' is between 5 and 10%.
I understand what a matched pair means.. but what is a “platinum matched” pair. It’s seems to be a very common term sellers use, there are pages of listings with that term.
I've heard the same thing as @Ripper2860 , but IMO it's nothing more than a sales gimmick. Just like tacking on 'Bad Boy" this or that to every 6SN7 tube. My favorite though is the seller that lists every tube as 'refurbished.' To refurbish a tube you'd have to cut it open, replace the coating on the cathode, add some fresh getter material, pull a new vacuum, reseal it somehow, flash the new getter, and then test it. Seems like a lot of work for $30 tubes, but what do I know.
+1 to sales gimmick. Besides -- why would one need a 'matched pair' for a single driver and power tube amp like the DV336?
(Maybe a single triode pair of tubes w/ adapter? Even so, 10% variance should be fine with any amp -- especially one that has auto-bias worth its salt.)
I understand what a matched pair means.. but what is a “platinum matched” pair. It’s seems to be a very common term sellers use, there are pages of listings with that term.
In my experience the matching process for anything mechanical (beyond tubes) is pretty simple:
1. Test your entire sample and write down the values, weights, or relevant factors for matching.
2. Sort them from high to low using the key factor.
3. Create pairs by stepping down the list to thereby minimize differences along the way. Tubes sellers tend to charge the most of the highest scoring pairs, but other products just match on weight, length, size but have no specific price advantage.
This process does indeed improve consistency where it matters. I doubt less than 10% differences could be reliably heard, as headphone drivers and volume pots also suffer from imbalances. And many of us have different hearing potentials for each ear. It'd likely matter if tube, pot, and driver were all biased in one direction.
I've heard the same thing as @Ripper2860 , but IMO it's nothing more than a sales gimmick. Just like tacking on 'Bad Boy" this or that to every 6SN7 tube. My favorite though is the seller that lists every tube as 'refurbished.' To refurbish a tube you'd have to cut it open, replace the coating on the cathode, add some fresh getter material, pull a new vacuum, reseal it somehow, flash the new getter, and then test it. Seems like a lot of work for $30 tubes, but what do I know.
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