kevin gilmore

If blubliss can repair a singlepower ES1 doing current source upgrades, and a few other things (without killing himself) then the monkey can certainly handle changing out the caps in a speaker crossover.

Make sure you get non-polarized caps for all the crossover parts. And obviously do both speakers at the same time otherwise its going to sound different.

Looking at the schematic, depending on where the short is, and whether or not the protection circuit is working right, it sure could cause some trouble. I think there are only 2 wires to the midrange/tweeter, if those are shorted it would definitely blow the fuse when the protection circuit releases the relay.

protection circuit similar to QUAD... They don't usually break. Top midrange/tweeter box turns. And so does the wire inside. Known issues relating to the wires shorting inside the turn tube. This might trigger the protection circuit.

Sometimes the top 10 stats thing on the bottom is smushed, multiple lines on top of each other... Ie8

Yes i have heard them. Fixed pole in this case means the rigidity of the stator. The design of the stator is years in the making. And far better than etched and plated glass, or copper on phenolic stators. The other pieces allow the earcups to rotate better front to back. You really want these things. Welcome to head-case and sorry about your wallet. Now if stax was going to actually do a T2 version 2, (correctly this time) with these headphones, the MSRP would likely be well into the $25k range... As it is, with the diy T2 and these headphones, the results are truely glorious.

you know that the usb output voltage is 5 volts, so likely the power supply inside the hub is a simple ldo linear regulator. Which means it probably won't work at 6 volts, and it might overheat at 9 volts if you are going to pull full power out of it.

I'm expecting about $4500 street price in the usa. Yep, not cheap. Worth it. Seriously worth it. Better and non-resonant stators than the he90. Less internal reflection.

That phillips scope is actually make by Fluke, i had one around here, and gave it away. Its a nice piece of equipment that is built well and will last a long time. The HP stuff is also a good deal.

Yep that new $179 version is definitely something i'm going to have to have. Way better than an iphone in the pocket... Well for what i need anyway. i have the original tekmeter digital portable scope, and its great other than it eats batteries alive...

It is really what i'm used to, and after doing the same thing for the last 35 years, i really do not want to change. 10x scope probe on 2465 is 1600 volts peak to peak perfect for doing electrostatic work. 10x on my new tds5000 is only 400 volts peak to peak definitely not enough. Not really fond of the 100x probes. And the 1000x probe is too big to be useful. More to the point is that my other scope is 50 ohms only. And 10x 500 ohm probes are a really bad thing to anything except low voltage RF.

Just about any opamp will work. With the capacitor fix, even an lm741 will work. Next 4 chassis are done and i'll have them tomorrow morning, and ship probably 2 of them tomorrow afternoon. Then the other 2 on thursday.

have a look here and drool... (go thru each wood on the left, one at a time) Woods by Specie: Amazon Exotic Hardwoods I'm going to buy at least 10 different pieces.

http://gilmore.chem.northwestern.edu/woodknob4.jpg http://gilmore.chem.northwestern.edu/woodknob5.jpg http://gilmore.chem.northwestern.edu/woodknob6.jpg http://gilmore.chem.northwestern.edu/woodknob7.jpg and for some reason i decided to do something goofy today, i needed bookends to hold recipies in the kitchen... http://gilmore.chem.northwestern.edu/bookends.jpg knob on its way to the UK in about 15 minutes.

The harder the wood, the better, and no cracks required. My old wood pusher retired and closed his business... I found a new wood pusher, will post link with good pictures later today. What i really want now is a piece of the absolutely solid black wood that they make clarinets out of. Will look like an anodized aluminum knob, but will be made of wood. Next up: Iridium knob

This will be the last crappy pictures from work, i was just allowed to buy a nikon 3100 to replace a 7 year old piece of sony crap. http://gilmore.chem.northwestern.edu/img_0119.jpg http://gilmore.chem.northwestern.edu/img_0120.jpg http://gilmore.chem.northwestern.edu/img_0121.jpg http://gilmore.chem.northwestern.edu/img_0123.jpg http://gilmore.chem.northwestern.edu/img_0125.jpg Then soon i replace the D3 with something newer and make that the in car camera. Looks like i need a couple more lenses.

anodizer running a bit late due to a big job, has promised me (yeah right) the current batch of chassis by next wednesday, then i'll ship all 4 by the end of next week.

Hey... they were soft and pliable And yes there is a new stax king of the hill. and about time too. Time for sennheiser to step up to the plate and produce some competition.

I think you are both missing the point, these things really are suitable for RF frequencies only. Unless someone can show me otherwise. DC stability on these devices is going to be absolutely horrible, and drift with temperature is going to be significant. Plus the input impedance is going to be way low too. Going to be great for cell phones and GPS receivers, but not for audio.

Actually i think it is 4 of the chips that are proprietary. Lucky i have 2 trashed scopes with bad tubes for spare parts. And now a 2467B that needs serious work. Nothing in this world lasts forever. All of the magic chips in the latest tektronix and agilent scopes are completely proprietary too. And soldered to the boards, so if you blow the input channel, you get a minimum of a $5k repair bill. At least agilent was smart enough to buy out triquint semiconductor.

The 2465 is an analog scope, and does have a 400 volt rating (20 volts per major division) In fact you can push it more than that in 1 meg input impedance mode by going uncalibrated. (probably not a good idea for most people) The digital scopes like the one i'm being forced to use lately (due to frequency) have a maximum voltage rating of 5 volts per major division. Or 100 volts. But really much less than that because the 50 ohm input impedance can only handle 5 watts peak. Over the years i have stayed away from digital scopes as much as possible. What i need to look at, and the way they work are incompatible. The worst ever are the LeCroy pieces of crap. I have 4 of those. Not even heavy enough to use as door stops. Agilent has a new scope that looks like it can do what i want. Stuffed the way i want it, its $280K... No joke. Given the fact that i spent about $70k on a scope 25 years ago,this is not actually such a bad price. If i could find a real time analog scope with a 1ghz bandwidth i would buy it immediately. Unfortunately, there is not now, and never was such a thing. I'm going to be spending the next couple of weeks fighting a home build 65ghz EPR system and know i'm in for serious amounts of grief.

At the rate things are going, commercial products should be available in about 10 years. But these things along with nanotube transistors are really very low power devices and capable of amplification in the 1ghz to 100ghz region.

If you want interesting and cheap and new... I saw and played with one of these last week. ARM DSO Nano - Pocket-Sized Digital Oscilloscope - eBay (item 200470598507 end time Nov-05-10 09:33:18 PDT) The best real analog scope ever made was the 2465C, recently i saw a couple go for cheap. Once you get into digital scopes, lots of stuff changes, and so does the real resolution which is usually 8 or 9 bits. Also most of the digital scopes have limited voltage ranges. I own both a 2465B, a 2465C, a 7000 series mainframe with plugins, the tektronix battery powered dso and a 5ghz tektronix color dpo, and i like the 2465C the best.

True story... Happened yesterday. About 25 years ago i lived 3 doors down from a guy named andy birnbaum. At the time he was a manufacturers rep for various audio companies. He just stopped by, said hello, wanted to put a sign on my lawn because his wife is running for illinois senate... Said he was the national sales rep for skullcandy. So i showed him the T2. He asked me what i thought of the skullcandy products. So i asked him the simple question if they sounded like the O2mk2/T2. No answer. So he wants to put me in contact with someone higher up in the company. This is going to be one interesting phonecall. I figured i would start out with the simple statment that every single part of your product line sucks. In my listening room at the same time were the hd800's and a couple other high end dynamics. He got to listen to those too...

My god what a pile of stuff. If you keep going at this rate in 20 years your house will look like mine. I'm interested in the brown dog adapters.