google in its infinite wisdom has made the old share unusable with no way to fix it and keep the same link. there are many posts here referring to the old share which i cannot edit. so here are the current links. thanks to the people that pointed out the problem. documents (including schematics...

I just received information that Chu Moy passed away in Reno Nevada on February 12,2016   Very sad.

After a recent accident where someone built an electrostatic amplifier and then modified the bias voltage generator to get 580V into a 10M load (the DVM) and then removing the DVM and almost frying the headphones...   Here is a simple and more than 1% accurate way of measuring the bias at...

I get asked about this fairly often, there are a number of different ways of measuring the voltages so here in one place is all the amps i know about, and all are rated the same.  The voltage is peak to peak voltage measured from one stator to the other stator.   For solid state...

due to construction at nwu, various people are now parking in other places, and i've run into this one a bunch in recent weeks. And since i had my camera at work today, it took a couple of pictures. (with the permission of the owner) http://gilmore.chem.northwestern.edu/vdub1.jpg...

raptor mini review and rudistor rpx33 mini review as well as a few different headphones in june stereophile. Evidently people are starting to take notice of this headphone thing.

The entire stax line is now available from elusive disc. Usa products (120 vac) with usa warranty from a quality vendor with a reputation for customer service.

And here i thought i was the only madman to build a mig amp. http://www.diyaudio.com/forums/showt...257#post837257 Lets see what you think about this one...

http://store.acousticsounds.com/mfsl...words=NL110205 a bargain??

Founding member, general manager, president, and a number of other titles including host of the midnight special for Chicago radio station WFMT passed away early this morning at the age of 72. He will be missed.

Just got the latest patricia barber Verse Sacd. Mobile Fidelity at their finest. Absolute reference disk on so many levels. This is a must have.

The complete lack of any discussions of tube designs here coupled with a bunch of trys at various geometries has finally led me to this rather interesting design. No caps in the signal path. http://gilmore.chem.northwestern.edu/ayu1.jpg And i want to see what people think. Biggest...

Nope... Not College Basketball.... This is Head-Fi Up until now every single OTL Tube headphone amp made by anyone (commercially at least) had one thing in common. A nasty electrolytic output cap. Everyone by now should know my opinion on such devices. The holy grail of course is a...

Recently I've seen the following said "The GL and the SR-71 sound extremely similar" and I've also seen the following said "The GL and the SR-71 sound dramatically different" One is ___ and **** and the other is @@@@ and &&&& Clearly both of the above statements cannot possibly be...

Interesting new pictures http://gilmore.chem.northwestern.edu/mpx3.jpg http://gilmore.chem.northwestern.edu/ppx3c.jpg http://gilmore.chem.northwestern.edu/ppx3b2.jpg

I'm gonna beat tuberoller on posting this one... Changes my next car buy decision again. Available with 440hp supercharged V8 http://www.keycast.com/keycast/Jaguar/X9/go.asp

OK, so i'm a little busy... Here is the power supply board REV ZERO. I have not checked this yet, someone else should. I don't even have all the parts to make sure they fit in the boards. The board is tight to keep it inside the 20 square inches...

It turns out that Woo Audio (initially without my permission) is building and selling my electrostatic all tube amplifier. So here are a couple of pictures. http://gilmore.chem.northwestern.edu/kgtubeelectro.jpg and a closeup http://gilmore.chem.northwestern.edu/kgtubeelectro2.jpg...

This ought to spark some lively debate... So i was looking thru a few OTL tube amp schematics and i noticed that virtually every tube headphone amplifier inverts phase. A quick glance at a number of solid state units and none of them invert phase. So that got me to thinking whether or...

So i was crusing another forum and came across this a few days ago and ran into this. http://diyaudio.com/forums/showthrea...highlight=6ar8 and then decided that for those people that wanted a tube front end and solid state output then this was the ultimate item as it had all sorts of...

For all you tube types here is what you all have been waiting for. All dc coupled, don't have to listen to electrolytic output caps anymore http://gilmore.chem.northwestern.edu/migmini.gif Fets and tubes. For dynamic headphones. Now i don't expect many of you to actually build it with...

I do not have an account with these people, and never would use their services. Yet they took a name that did not match the name on my credit card, and my credit card number from a computer in indonesia and racked up quite a bill. Their completely lax security policies coupled with a really...

The board with the heatsink http://gilmore.chem.northwestern.edu/dynahi2.jpg 200khz square wave into 33 ohms (i keep burning up the 5 watt load resistors) http://gilmore.chem.northwestern.edu/dynahi3.jpg Yet to install and test the servo... Finished pic...

http://focus.ti.com/lit/ds/symlink/tpa6120a2.pdf the headphone amp chip by itself should be perfect for portable applications. And of course that really is the way to do dsd