VacuumTubes.com (not to be confused with VacuumTubes.net - different vendor) has some terrific prices but I'm wondering whether that is due to the merchandise possibly being of lesser quality such as selling used tubes as ANOS or exhibiting microphonics. TCtubes' prices are more in line with...

Can these be used in place of a 6SN7 or 6SL7?

Can anyone explain how to identify specifically a *1943* Sylvania VT-231? There seems to be no date codes whatsoever. :(

Has anybody tested the ECC31 directly in contrast to the ECC32? If so, what were the differences in sound quality, if any?

Has anybody tested the ECC31 directly in contrast to the ECC32? If so, what were the differences in sound quality, if any?

Quick question ; would you guys buy a tube with a crack in its base, if the seller has a good reputation (on eBay) and has confirmed to have tested it in an amp for any abnormal behavior?

Has anybody compared Sylvania 3-hole Bad Boys from 1952 to other years? From what I've read, they were only made during 1950-1953 so I'm wondering if there is any difference in sound from 1952 to the other years.

Hmmmm,.. nevermind. Just noticed my mistake. :)

Nevermind.

  The turntable I'm using has an onboard preamp. After doing extensive research, it appears the T1 can't be used with the tube for anything but through USB sources and not even with headphones either. So it's a very specific limited usage for this device and it can't be used as a tube buffer...

I learned that the tube is not active when connecting a source through a T1 Aune's line-in and am wondering if the same occurs with the T1se?   What I'd like to do is plug my turntable into the line-in to take advantage of the tube's beautiful imagery but that's not possible through my T1. If...

I'm itching to buy one of these for my wife who works in a noisy environment (i.e. blabbermouths). The thin cable is of concern to me as a few reviewers mentioned that it degraded a little too easily.   I wish to know if anybody has any tips on easy mods one could perform to strengthen the...

  I'd like to add that I did a direct comparison between the 7308 and 6DJ8 Amperex OG and I preferred the 6DJ8 by far. Giving a rough quantifying percentage, I'd say it sounds roughly 20-25% better in my view.

Hey Mike.   I too suffer from hyperacusis. It's terrible and taxing on a day-to-day basis. Hang in there, bud!

You shouldn't be sanding a tubes legs. As long as there's a connection, it doesn't matter what the legs look like.   In extreme scenarios where the legs would be utterly filled with oxidation or rust to the point of the tube being unusable, I'd use some strong alcohol to remove this overnight...

  Just so you're aware, it's "voilà."   A viola is a small violin. Don't mind me. lol!

  Are you using an iBasso player or DAC? If you're using it as a DAC, why are you plugging into the T1? That makes no sense. Just plug your source into the T1 and your headphones into the T1. Don't daisy-chain your DACs.   The T1 accepts USB-in and RCA-in. If you're using an iBasso player and...

  You're being quite unclear.   What is your signal chain?

  Nothing wrong with the wiring. Used a tester to verify this and had my electrician confirm everything was clean. Nevertheless, the issue persisted.   I've encountered this problem in every single home I ever lived in in my life regardless of what I was using. I was just glad to finally be...

  Just the following chain ; PC > T1 > stereo amp.   I wrote detailed posts about my issues with static and all kinds of EMI noise emanating from my PC, so I needed a device to filter that crap out. The Olimex is the only thing that fixed the issue and that was after an entire month of going...

UPDATE!   I contacted Digi-Key from whom I had ordered the Olimex USB Isolator from and they surprisingly apologized and replaced the item for me at no charge whatsoever!   They just got a customer for life. Way to take care of your customers, guys! A+

Here's something interesting and sort of related to the T1.   My Olimex USB Isolator started to emit a LOT of smoke when I turned on the T1!!!!   I even shot of video of it. Right before I turned it off. I'll need to RMA it but I'm wondering if ;   1) It'd be worth it considering Olimex is...

Do you know what caused that transistor to burn like this? I'm assuming it had to do with all the caps being so tight in the T1's body?

Hey Mike.   Did you manage to find another T1, yet?

Ah. Thanks for making me realize this. I've been wrong before. lol!