aerius

Silver mica. They're the only ones my local surplus stores have in the low pF range.

Grid neutralization works, but it can have issues. Sometimes it can cause instability, sometimes it can cause ringing on transients, and some say it just sounds funny. I've generally had good results with neutralization and have been using it in all my P-P amps. Personally I find transformer coupled amps to be more musical AND accurate, mind you I haven't heard a Zana Deux or any of the other high-end high current output OTL's whereas I've sampled some stupidly good transformer output amps. I like transformers since it gives me more tubes to choose from when building an amp, if you want high current low output Z from an OTL you pretty much have to use a 6AS7, 6C33, or other such large output tubes, while with transformers I can use 6BL7's, 7044's, and even 6SN7's if I wanted to.

2 words. Bas Rutten.

Just don't build it with the 6C45P or 5842 on your first go, those tubes are damn twitchy and require a really good clean layout or else they oscillate at some absurd MHz range frequency. Personal experience, I learned that the hard way. You might get lucky, but the odds are against you. I'm looking at that one too, problem is I can't source the transformers at a price I'm willing to pay. With good transformers you're looking at something like $500-1000 for transformers alone, the parts cost gets out of hand real fast.

170 IQ. Yeah, sure, whatever. And my dick is so big that all my pants have 3 legs.

No, but there is a TooleAudio Balanced Mosfet Amp. It's exactly the same, but completely different.

He should put "1 of 50" on every single one of the 50 amps he makes. Everyone gets the lowest serial number, and it's also not a lie since every amp is one out of the 50 or however many amps he makes.

Those are cock rings.

Try this one. I'm using this for my RS-1 right now and I'm quite happy with it. Instead of the 1+1:1+1 phase-split transformer that's on the schematic, I'm using an old UTC 1+1:1.5+1.5 that's wired up in reverse so that it's a step-down instead of a step-up. Depending on how neat your wiring layout is you might also have to adjust the value of the 4pF grid neutralization caps, which should be >400V silver micas. 4pF is a fairly safe value to avoid oscillations while speeding up the amp a bit. The cap between the centre-tap betwen the output transformer and the cathodes which I forgot to label can be anywhere from about 20-50uF, use a motor run cap that can handle 330V or more. I've wired the Lundahl as a 11k to 8R output. All caps in the PSU are 330V motor run caps, not to be confused with motor start caps. Motor run caps are the big oil impregnated poly film caps, like the ones found in n_maher's Menace amp.

I thought the duct tape part would be enough to tip off that it was clearly sarcasm.

Duct tape. You wrap the caps with a couple layers of duct tape, then duct tape it to the chassis. One of the neater solutions I've seen so far use plastic battery holders. The caps just happened to fit nicely in a AA or C size battery holder, so the guy just glued the caps into the holder and screwed it into the chassis.

The output is taken from the plate. Thing is the 6C33 has a pretty low plate resistance, I think it was somewhere around 90-100 ohms so with a bit of negative feedback around the tube the output impedance can be dropped to a reasonably low level. I remember KG posting the numbers somewhere but I can't find them at the moment.

This is why I'm happy there's a bunch of electronics surplus & parts supply stores in my area. There've been so many times when I've forgotten a resistor or a jack or some other stupidass part, and then had to make a run to the store so that I could get my project started.

This. I'm told there's now a slightly improved variation using WE 205E's on the input, but I haven't heard it yet.

There are two kinds of elitism, the bad kind which involves people who are born into high status and are way too full of themselves, and who believe that by nature of who they are they deserve to be respected and worshipped. The other kind is what we have here, people who through their work & experience have gained a ton of knowledge, far above that of the average person, and are willing to share their experiences. This is the good kind of elitism, educated viewpoints & opinions which have something to back them up. If for example I say "XYZ sucks", I can and will tell how it sucks, why it sucks, and the technical reasons for the how & why. Everything I've said here, I'll say to someone's face. And I have, in real life. Hell, this forum is tame compared to what I'm used to. You really need to read more of the forum. Seriously. Either that or work on your reading comprehension.

Yeah, that's right, I must be totally mad because I'm swearing at you and calling you a socially retarded dipshit. Project much asshole? I'm swearing at you because you deserve it and it fucking amuses me. It's not every day I get to call someone a mung sucking assclown.

Are you just stupid or are you socially retarded? You've just done the equivalent of walking into a blue collar bar and yelling "hey everyone! I own the damn factories you work in, and I make $5 million bucks a year, and lemme tell you something, I know how the world work and you don't, and that's why I'm rich and you're all jealous of me!" And then you wonder why you're not getting a warm welcome.

markl, let me put this to you straight. Pretty much everyone here already knows that you get review samples, and that manufacturers ply you to review their wares. You've alluded to this on Head-fi in the past, it's not a secret. We know, but we've been more or less indifferent until now. Why? Because up until now you've had the good sense to keep it quiet, but now you've decided to be an egotistical jackass and brag about your super special industry insider knowledge and powers, and how it makes you all special. At best, it's goddamn fucking rude and shows a complete lack of class. In smaller words, it makes you look like an asshole.

Damn right. I'm a semi-active member of the audiophile group in our area, many of us are longtime members of one audio related board or another, a surprising number of us get beta testing & review samples from various manufacturers. It's not a big deal, and it's certainly nothing to brag about.

Hey! Look! A dickwaving contest! I'm more important than you guys!

It's on my list of things to do, I plan to get around to it eventually but it's probably going to take a while.

And that's just fine. If you're upfront and say "I want ownership of my mods and I want to make fucking money off them", that's cool. But when you imply in one post that you want control & ownership of the mods, and then two posts later you say "but what about the poor people who can't get my mods if they can't do it themselves?" when there's someone else offering to do them, it makes you look like a lying sack of shit for trying to have it both ways. And that's why I called bullshit on you. I couldn't care less about others making a profit, hell, I made more money than I care to count with put options on BSC and Lehman's. You wanna make money, go for it, just don't fucking lie about your motives.

What a load of bullshit, when in a previous post you wrote: So if your object was getting the mod out there and providing a source for modifications for those who can't do it themselves, then the objective was already met as there was someone offering to do the mods for other already. You didn't have to get into the mod business if you didn't want to, all you had to do was say "sure, go ahead, do it, spread the word of the markl mod to the people". And markl mods would've been available to the people who couldn't do it themselves.

You know what's funny? That happens every single day, multiple times a day on DIYaudio. It's not a big deal. Nobody cares about giving away years of knowledge that was learned the hard & expensive way.

This is not Head-fi, let loose, say what you really feel, you can even use fucking swear words. That's a dilema? Let's see, you're a well respected long time member on Head-fi, if some schmuck wanted to rip off your mods and do them for a fee, all you need to do is start a thread saying "that fucking assclown is ripping off my hard work, don't do business with the cocksucking dipshit", and people will listen. You can slime him so hard that he'll get death threats and angry calls & emails at all hours. If someone wanted to profit off your work as you claim, you could've fucked him, but you didn't. I find it hard to believe that this course of action never crossed your mind. By the way, I've been in your exact same position when I was dicking around with mods on my K340. The thread is still there on Head-fi, I still have all my saved PM's of people asking me to do the mods for them, and offering to pay me for it. I have PMs from people asking me who can do the mods for them. I could be around $2000 richer right now just from those PMs. I told'em I don't do mods, I refered them to others who had successfully done the mods, as well as commercial modders such as Headphile. I've spent close to two years dicking around and improving my K340, and every last thing I've done is available to the public for free. I don't give a shit about "owning" the mods, I don't care that Headphile does a simpler version of them and charges a crapload of money for it. It ain't important to me, it's not some earth shattering invention, it's just common sense stuff that anyone with half a brain could come up with given enough spare time and that's why I don't care if others are making a crapload of money off it. If I didn't come up with the idea, someone else would've, and it's not like my idea was original in any way since many others have applied similar principles to other headphones. I just happened to be the first to adapt prior art to a K340, and you're the first to adapt what has been learned in the past to a Denon. I ain't special, and neither are you, both of us are just adapting ideas which have been around for decades, and which have been used for ages in speakers & headphones.