kevin gilmore

Billy said earlier in the thread that it had to be a 5 year old Can a 2 year old draw circles and squigly lines???

Two kind people contacted me with the tube compliment of ray's new B52. Ray is if nothing else is consistent. Single minded and mired in anchient history. Lets see, 2 raptors each of which with a diff amp (the 4th tube) in one box. Double the output impedance, which is already too high. Probably great for sennheisers, but really miserable for grado's. I'm trying to find a 5 year old with a box of crayons to draw up the schematic for me This is an absolute first for me. Formal show introduction to schematic in less than 2 hours Billy definitely named the thing correctly.

You probably don't want to see my collection of B&K calibration mikes and all my Neumann's... All of which are electrostats... Cameras, you betcha... Cars, yeah them too...

There is at least $600 in lundahl transformers alone. This is not an otl amplifier, and sure looks to be single ended output drive. Nothing at all like a gsx or balanced singlepower. And probably sounds nothing like them either. Just a wild guess, but this is around $3000.

Its absolutely perfect because it puts out enough power to wake the dead, then kill them again Without even having headphones on. Its something like 4 kilowatts... And that warning sticker is absolutely great. In all my years of touching and seeing the insides of equipment (including radio station transmitters) not once have i seen a sticker like that. Usually stuff of this nature has a microswitch under the cover that when opened drops a relay that shorts out all the nasty stuff, but not this thing. Scary stuff. I'm going to trash it for parts, mainly the tube and the tube socket. Save the mains transformer for other equipment of this type and the rest goes in the garbage can. Probably save the filament transformer too.

Please billy tell us how you really feel...

Here is an absolutely perfect balanced tube amplifier that would make up for rays complete lack of hearing... Just picked it up on thursday. Not sure what i'm going to do with it yet. http://gilmore.chem.northwestern.edu/ramp1.jpg check out the warning label http://gilmore.chem.northwestern.edu/ramp2.jpg the insides http://gilmore.chem.northwestern.edu/ramp3.jpg and the directly heated triode output tube http://gilmore.chem.northwestern.edu/833a.jpg

Wow, billy put all that work into creating a name. I'm impressed. What are you going to do next? Please don't take this the wrong way, but go fuck yourself. If a product deserves bashing, i will bash it. If ray actually does come out with something decent that is not a 30+ year old design stolen from various places it would be a first for him.

lots more info here http://sound.westhost.com/project25.htm figure 5

That was the stereophile mini review right??? I think he was trying to be kind. Loved the knobs and adjustable everything. The bass thing is definitely a big problem. Excessive amounts of subsonic's can only do bad things like overpower the amplifier, overheat the driver and possibly overextend the drivers physical abilities. That applies to every single speaker whether decent or otherwise and certainly every dynamic headphone. May even apply to the stax. A second order rolloff (i.e. 12 db/octave) below 20hz is part of the riaa spec. Back when the spec was created the phono carts at the time did not have the compliance they do now, and barely responded to 50hz let alone record warp. Many of the other expensive phono preamps out there (levinson,krell,sutherland,pass) add an additional 2 pole filter to get 24db/octave below 20hz.

Pfizer is a truely wonderful company. Donated several million dollars worth of state of the art equipment to the chemistry department at northwestern university. Hope they do it again soon.

Correct, the xr10b is completely an unbalanced amplifier with a drv134 as the unbalanced to balanced converter. http://focus.ti.com/docs/prod/folders/print/drv134.html Most people i've talked to consider the high frequency end to be significantly over exaggerated. In addition the low frequency rumble filter is missing. Put this thing on a system with Wilsons and rumble city and seriously flapping woofers. Which cause the woofers to fail in short order. In addition the riaa curve is not very accurate. It could have been so much more. Since a phono cart can really be considered a balanced source, the whole thing could have and should have been balanced, input to output. There are some phono sections that cost significantly less that are... http://gilmore.chem.northwestern.edu/xr10bs.gif Now back to the bomber. the B52 is a fitting name. Designed and built from the 1940's thru the end of the 1950's it truely is an anchient history piece.

no no no "its da bomb (er)"

Ray has been working hard on this one, and for quite some time. Wanted it out before the GSX, that did not happen. Definitely balanced and from what i'm told, solid state. Which probably means 2 x hr2 in one box. Ray has so little clue in general (like the balanced output on his phono preamp) that he is bound to get this wrong too. I'm sure he will show it at the april show, and of course it will be the most wonderfulest thing ever. Wait, if its emmeline II then it has to be tubes. That should be even worse.

I have to leave it at that. Until the issue is resolved one way or the other... I do have a picture of the idiot holding the thing on the train. (which is why this all happened as its been going on quite a long time) Give it a few months... sorry....

If i told you what this moron was actually doing with the N2 you would not believe it. I still don't believe it. In any case if they don't toss him out the door he will have his Ph.d and be gone in 6 months anyway. And i'll finally be rid of this jerk. Northwestern University is a private institution and as such is more liable in stupidass cases like this. Suing a public college however is just like suing the goverment and really ends up coming out of the national buget. So the moral of the story is if you are going to do something massively stupid, do it at a public college And if you think this person is going to learn anything from this you would be very wrong.

This particular idiot was holding (and i do mean holding) an open top glass dewar on their lap with a stryofoam plug. a sudden train stop and the person in front of them is likely to get most of that spilled on them. By the way, this particular idiot also likes to wear roller blades. Don't know if they were also wearing them on the train or not. This particular person has been caught numerous times roller blading inside the building. And most of the time can't stop and run into things. I'm really not kidding about this. This particular student is in a whole bunch of trouble and is likely to get kicked out of the university and have their visa pulled.

I did read somewhere that ray will modify a unit if you ask him too. Not sure now where i saw that. Hey, great idea.... cryo some hornets. Soak em for a week. That should align all the oxygen free copper traces A new business for ray...

I've already x-rayed a hornet. Really don't need to see another one. Unless its one of the new "mellow" sounding ones. Not sure what parts my good friend ray has switched to for that alternate sound. I go thru about 500 litres of N2 a week. Would not even think of trying to take some home. But if i did, i would borrow someone's pickup truck, and use a sealed dewar that is tied down real well.

Someone gets hurt real bad. Shattered bones, lots of permanently dead flesh... editted to fix quote tag

edited just slightly to remove some names. I received the following memo from the Office of Research Safety. Please note that hazardous materials regulations have been strengthened in recent years (particularly since 9/11) and there are SERIOUS consequences for ignoring them. Fines for transporting unlabeled hazardous materials start at $15,000 and there are provisions in the regulations for criminal penalties. Date: 4/3/2006 To: Department of Chemistry From: Office for Research Safety RE: Hazardous materials on public transportation A recent report has caused some distress in our office. A student was observed on the Purple Line with a four liter dewar and box of supplies from a laboratory. The dewar was clearly labeled as being owned by a faculty member within the Department of Chemistry. It is not known if the dewar was empty or if it contained liquid nitrogen. Needless to say, this caused some concern to other passengers on the train, one of whom also happened to be a Northwestern University student. For those not in chicago the purple line is one of the public transportation elevated trains. Now here is my comment. I know the student involved. I know the professor involved. The N2 container was in fact filled. This is not the first time this has happened. In fact about 2 years ago some idiot student put a filled 10 liter container in the back of his car....

What? An honest salesman who speaks the truth??? Seriously we need a couple more like tyll.

How much more blatant can i be What rock have some of you been living under...

The only question is whether i spill the beans on the new headroom 2006 module, or let Tyll do the introductions... " **** are a girls best friends"

You want criticism, sure i can do that. Well one thing for sure, its a whole lot better than the italian built crap of 2 years ago. Real etched circuit boards. No more silver plated copper wire reinforcement to make up for hand etched boards. But it really is the same basic circuit which is a no feedback circuit with a single gain tube and a common emitter follower into a low impedance resistor. And 4 of these amplifiers, two for each channel when a a balanced input is used. Somewhere, and now deleted it said that the output impedance was virtually zero. I don't think so. Likely 5 to 10 ohms per amp, double that balanced. For low impedance phones its definitely an issue. It is not immediately apparent that you can actually get balanced output from an unbalanced input. Whats up with the hand made copper box around the output jacks. Where is the picture of the power supply box. How much noise does the fan make. Still i give rudi a B+ for the effort involved. This thing is not going to be cheap. There is $800 in pots alone. Probably $3500 to $5000 USD.