kevin gilmore

you are going to have beelly to recreate the sr71 hot tub incident

And done.

And replacing the electrostatic tweeter is going to be next to impossible, and i know of no one that is reconditioning those things. Still a very sweet speaker.

klh 9's soundlabs (with the direct drive tube amp) martin logan's dayton wrights (with piezo tweeters) esl56's tripple stacked with decca ribbon tweeters esl63's crown esl's with 15 inch dynamic bass drivers beveridge had them all, still have the esl63's

unscrew the connector, stretch out the techflex, pushing it back thru the rubber, use a single small cable tie to secure it.

You can be sure the construction techniques will be unique and highly proprietary.

Its more than BS, it is flat out wrong. Each secondary is wound with a specific wire size. The wire size dictates what the maximum current that particular winding is good for. So even if you take the two windings and put them in series, and then put the two 110 windings in series and tie to 110 volts, the maximum current you would get out of the thing is 4 amps. The fact is that using the most power hungry output tube you can find, all you are going to need is 10.6 amperes total. Unless of course its a balanced unit and then you need 21.2. At this point it is much more reasonable to wire multiple tubes in series to get the current down, same as craig does on the zana deux. The more current in a wire, the larger the magnetic field it generates. Which is one of the main reasons that filament wiring is usually heavily twisted pair, or DC.

Not the pico or ae2. Both of which kick ass. Mikhail, ray, justin and a few others are special people that put up with a lot to do what they do. Same thing with the 2 todds. Ray was up until recently the most sucessful of the bunch. No one would consider Tyll normal by any stretch of the imagination. I notice that AKG and Studer are now listed as owned by harman international. A sad day indeed for revox/studer. nagra is bound to be next.

Not in this economy. Krell is going to shrink by more than half over the next few years and has already laid off numerous valueable employees. Levinson was bought by Harmon Kardon who is now itself finally in a bit of money trouble. None of the levinson monoblocks are made anymore. Revel in similar shape. Crown now also owned by levinson. Not a good thing. Ayre and many of the other boutique companies are in severe trouble. Many great and not so great speaker manufacturers have gone out of business. Jeff Rowland fired his entire company something like twice now. I would much rather sit down and listen to the music, and get justin to build all the stuff i now want. Too hard to make money in this business, and too much work to build it for nothing.

266N12 transformer from mouser $34.37 plus shipping 266N12 crappy non-ventilated box, power connector,switch and wire $15.00 Mikhail's expert soldering job to put the piece of crap together.... PRICELESS

your wish is my command... Why doesn't mikhail's stuff look this good? Its 3 to 10 times as much money. And lookie just one umbilical connector, you can't plug it in wrong... http://gilmore.chem.northwestern.edu/zd01.jpg http://gilmore.chem.northwestern.edu/zd02.jpg http://gilmore.chem.northwestern.edu/zd03.jpg http://gilmore.chem.northwestern.edu/zd04.jpg http://gilmore.chem.northwestern.edu/zd05.jpg http://gilmore.chem.northwestern.edu/zd06.jpg http://gilmore.chem.northwestern.edu/zd07.jpg http://gilmore.chem.northwestern.edu/zd08.jpg http://gilmore.chem.northwestern.edu/zd09.jpg http://gilmore.chem.northwestern.edu/zd10.jpg http://gilmore.chem.northwestern.edu/zd11.jpg http://gilmore.chem.northwestern.edu/zd12.jpg and the original prototype (i think) http://gilmore.chem.northwestern.edu/xyzana1.jpg http://gilmore.chem.northwestern.edu/xyzana2.jpg http://gilmore.chem.northwestern.edu/xyzana3.jpg http://gilmore.chem.northwestern.edu/xyzana4.jpg http://gilmore.chem.northwestern.edu/xyzana5.jpg http://gilmore.chem.northwestern.edu/xyzana6.jpg http://gilmore.chem.northwestern.edu/xyzana7.jpg

and the correct answer is... So I am INCORRECT. Each filament is run at about 94% of rated power.

Here is the first answer back from craig, which did not answer my question, so i will try again. The external transformer in the picture is a 6.3 volt 8 amp transformer and is obviously the low voltage supply. That is NOT a 14 amp transformer.

you are taking tubes that are rated at 100 volts and pushing them to 350 volts. Some are going to take it, some are not going to take it. Some may take it, but have a very shortened lifetime. Where is the damm transporter when you need one. Economy air shipping from (xxxxx) but clearly over the pond takes too long.

I remember those things. 750 watts of pure heat per channel. The only thing worse is a pair of vtl wotan monoblocks at 1000 watts of pure heat per channel.

I have the evidence, i just have not found it yet. I have crap stashed on at least 11 different computers. If i had some kind of organizational system it would make things easier. Next lifetime. I've asked craig in an email to clarify. Will see what he responds with. Since he is the one that builds and sells the things, it would make sense that his word would be the gold standard on this issue. I personally run 6c33's at full blast. And it warms the room in the winter. It would be possible to run the 2 filaments either in series or parallel (parallel would be prefered for this) and then run them at reduced voltage, say 8 volts. Not sure that this would be a good thing for the tubes however. This is the quote from craig's website Pretty sure that this is what he said on head-fi about it at the time.

Fine. Prove me wrong. One picture is all it takes of the bottom of the tube socket. Is serial number 38 from the second batch, or 3rd batch? Or contact craig for the correct answer when he started using both filaments. I don't know the answer i just know that the original prototype and the first batch all used one filament.

Yay team... My pictures of the zanadeux are the one with the tube sockets on the top of the chassis, so that you can't see anything. I have other pictures just can't find them. Craig will tell the truth. Problem is that mikhail does not know how to tell the truth anymore. The first person he needs to stop lying to is himself.

At 10 amps that is 1.5 volts of drop. And yes that is what it is for... A shorted filament however and flame city.

email craig for definite answer and then post here. Maybe things have changed since the early units. Its very hard to tell just by looking at the tube running whether both filaments are on or not. Or pop the chassis bottom and see which pins are wired. If all 4 pins, 1,2,6,7 are wired then both filaments are used. Even easier, turn it off, wait a while, pull one tube, use an ohmmeter and measure the socket between 1 and 6 and 1 and 7, a short will indicate both filaments used. http://gilmore.chem.northwestern.edu/6c33.pdf

Absolutely sure. C57 and C58 are 22000 uf caps rated at 25 volts. The diode bridge is bolted to the back of the panel. The 4 diodes in the middle are the high voltage supply, those diodes are rated at 1 amp each. As far as i can tell the B+ is diode bridge to 390uf cap, 50 ohm resistor to 390uf cap, 50 ohm resistor to 220uf cap 50 ohm resistor to 220uf cap.

OK, here is another one. Lets say you stuff your extreme with a pair of 6528 output tubes. A total of 10 amperes of filament power to run them. Looking at the circuit board we see that the filament supply has a full wave rectifier diode bridge going into C57, C57 is hooked to C58 with a .15 ohm 6.5 watt resistor and C58 drives the filament dc to the two output tubes. 10 amperes of current thru a .15 ohm resistor is 15 watts. More than double the rating. Which is why the circuit board is starting to burn up around the leads of that resistor. Yep, here is that new term again... acetate failure. So if you ask if there are unsafe things inside an extreme, the answer is clearly yes.

Once again earl does not know what he is talking about. source http://gilmore.chem.northwestern.edu/6c33.pdf craig has said numerous times that he only runs one of the 2 filaments to save on power and heat on the socket. So each tube is running at 3.3 amperes. craig has posted this a few times, someone else can go find the post. On to current calculations on the extreme.

I have every expectation that the one person who was sending the amp to me has been contacted by mikhail and mikhail has done a major spin job on him to prevent me from ever seeing the amp. We will see what happens. Mikhail is yet to figure out who has the circuit board unit... Maybe bluebliss can supply a few pictures...