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  1. Xcalibur255

    L0rdGwyn's DIY Audio

    It's not about differing viewpoints (which is a good and healthy thing), but rather about some people's inability to tolerate a viewpoint that differs from their own. I feel like the silos we live in have grown very tall in recent years.
  2. Xcalibur255

    L0rdGwyn's DIY Audio

    There's a weird sort of obsession on sites like diyaudio with making these projects as cheap as possible that I personally have never understood. I can see why it would be fun to try and make something sound subjectively good for as little money as possible as a challenge, but not with every...
  3. Xcalibur255

    L0rdGwyn's DIY Audio

    The K701 has a weird affinity with OTL amps that has never really made sense. Long ago I used my GOTL exclusively with a pair until a naughty 5998 tube blew them up. Side note: the K712 does not have the same magic that the K701 did. It sounds passable on the GOTL but something about the...
  4. Xcalibur255

    L0rdGwyn's DIY Audio

    Are they wound by hand or with some kind of rig with a stepper motor? I've read that tolerance consistency is important to the performance of OPTs.
  5. Xcalibur255

    The Reference 6J5 Thread (L63, 6C5, 12J5, 6P5, etc.)

    Every NOS driver and power tube I've used has gone through this transformation from thin and flat to full and melodious. Not always to the same degree or in the same period of time, but they all do it to some extent. In fact one of the ways I'm confident that a tube I've just bought is truly...
  6. Xcalibur255

    The Reference 6J5 Thread (L63, 6C5, 12J5, 6P5, etc.)

    I actually have a bit of experience with the whole 6AV5 6B4G thing. The 6AV5 oscillated like crazy in the particular amp I tried it in.
  7. Xcalibur255

    The Reference 6J5 Thread (L63, 6C5, 12J5, 6P5, etc.)

    This is why I don't attempt the solder re-flow on my buzzing tubes. I feel that the solder joint isn't always the source of this type of noise, sometimes it's actually a tiny speck of debris lodged inside the grid from manufacturing and a good "thwack" in your palm can knock it out. Other...
  8. Xcalibur255

    L0rdGwyn's DIY Audio

    Museum ship or working? Both sound fun.
  9. Xcalibur255

    L0rdGwyn's DIY Audio

    I did vet this store looking for horror stories on online forums before ordering and didn't find anything that would raise eyebrows. They even sell the expensive limited edition RK versions of the KR tubes so there was nothing that raised any red flags. As soon as I had a problem and needed...
  10. Xcalibur255

    ZMF Atrium - new open-back co-flagship

    I think when the language conveys how much a person is enjoying what they are experiencing that's a valuable insight in and of itself.
  11. Xcalibur255

    ZMF Atrium - new open-back co-flagship

    I have a suggestion if I may: maybe the thing to do is to setup the specific product pages with a "Get To Know Your Wood" section that describes the wood species in detail just like you did here so people have an idea of just how much variability they might be in store for. Honestly I would...
  12. Xcalibur255

    L0rdGwyn's DIY Audio

    I haven't tried a KT90 yet either. That would probably bias up about the same as a KT150 does in my amp in the EL34 bias setting. I did try a KT66, which sounds fine but is my least favorite of the power tubes I have on hand. They're very nicely made but the sound lacks the depth that the...
  13. Xcalibur255

    1101 Audio custom crafted headphone amps

    That looks more like Blue Halo++ to me. :) So we've got 6SN7 and 6J5 options in the front three sockets, and I'm guessing the next two are for 6080/6AS7, but what are the other four sockets for? Plenty of tube rolling opportunities here for sure! It's nice to see some activity around here too.
  14. Xcalibur255

    ZMF Atrium - new open-back co-flagship

    Just to clarify, I'm not criticizing here in any way. You wouldn't have enough hours in the day to accommodate every person's custom requests and wishes and it's entirely impractical to run a business that way. My point is more that for some folks ZMF headphones are always going to be a little...
  15. Xcalibur255

    ZMF Atrium - new open-back co-flagship

    This is a good example of the whole conundrum with wood. The cocobolo was a pass for me because what the photos on the website show were not my cup of tea. This, on the other hand, is gorgeous and I would buy this in a second. It's honestly hard to believe they're both supposed to be the same...
  16. Xcalibur255

    L0rdGwyn's DIY Audio

    I really think you might be missing out actually. I heard through the grapevine that only GE tubes activate the special booster circuit in your amp that makes it sound its best.
  17. Xcalibur255

    L0rdGwyn's DIY Audio

    Yeah, that's jogging my memory a little. It's not a spec thing, what I meant was that people seemed to think they didn't sound as good. I haven't compared myself so I don't have a personal opinion on it.
  18. Xcalibur255

    L0rdGwyn's DIY Audio

    It was my understanding that the 5998A is not equivalent to the 5998? It's been quite a few years now since I've been in a conversation on the subject so I can't quite recall now.
  19. Xcalibur255

    L0rdGwyn's DIY Audio

    Honestly neither have I, but that's mostly because the 5998 is so expensive to replace now and the headphones I use with the amp these days have better synergy with tubes like the RCA 6AS7.
  20. Xcalibur255

    L0rdGwyn's DIY Audio

    This was my idea actually (in the GOTL amp world at least, certainly not in the larger world of tube amps). I was teaching myself about how different tubes bias up differently in the same circuit and learned that the 5998 can and often does sound thin or lean in many circuits people use it in...
  21. Xcalibur255

    L0rdGwyn's DIY Audio

    To phrase a different way, one of the things Keenan is saying here is that some circuit designs are setup in such a way that the output tubes do not contribute any amplifying gain to the music signal at all. I believe his Airmid is like this, where as the GOTL on the other hand uses the output...
  22. Xcalibur255

    L0rdGwyn's DIY Audio

    Different operating points and active loading might explain the difference too. It's fairly common for a tube to be noisy in one amp and quiet in another, and I've also found specific pairings of driver and output tubes that seem to create noise issues but each tube will independently be noise...
  23. Xcalibur255

    L0rdGwyn's DIY Audio

    The ST glass 6J5 are kind of a double-edged sword in general. My opinion based on my entire collection thus far: the ST glass tubes seem to generally have an advantage in resolution and overall depth of presentation, but they are also tend to be more problematic tubes with higher rates of noise...
  24. Xcalibur255

    L0rdGwyn's DIY Audio

    In fairness to Vampire you can get them both with and without a ground tab, though a case could probably be made that the version without probably just shouldn't exist. Each variant has its own part and model number.
  25. Xcalibur255

    The Reference 6J5 Thread (L63, 6C5, 12J5, 6P5, etc.)

    Stuff like this is classic. People put so much energy into dodging damage to their reputation, and if they just conducted their business honestly their reputation would take care of itself and they wouldn't have to worry about it.
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