kevin gilmore

CMC--Teflon Tube socket the last time i looked, the prices at pcx were $21 each... At $19 each the group buy turns into more trouble than it is worth. You can buy them from ebay too, 2 for about $32 I already have enough for 2 amplifiers... 4 of each of the sockets are required... 4 x 6ca7 4 x 6dj8

well i like the socket prices http://gilmore.chem.northwestern.edu/cmc091023.jpg but something whacked with the shipping charge. (round 7...)

Last time i checked, balanced P&G were about $580, but the price has likely gone up.

More info on the teflon sockets when i get it. Maybe someone else can do the group buy, otherwise i'll do it. At some point soon i may need a bigger house So they say measure twice and cut once. I kind of believe in measuring about 12 times and cutting once. (especially with these prices on the circuit boards) http://gilmore.chem.northwestern.edu/t2chassis7.jpg http://gilmore.chem.northwestern.edu/t2chassis8.jpg

The language barrier is killing me, but if someone wants to do a group buy on the sockets, we can get the 9 pin ones for a bit less than $14 each, and i still don't know how much the 8 pin sockets are.

http://gilmore.chem.northwestern.edu/t2chassis6.jpg

Every one of the electrolytics needs replacing. The yellow ones and the silver ones. The orange ones are not electrolytics and do not need replacing. All cracked resistors obviously need replacing.

Remember that there are 2 chassis, another identical one for the PS. The circuit board that goes on the inside is 12 x 16. I think the resulting chassis had better be 15.4 wide x 16.7 deep x 2.96 high (plus feet) (plus tubes) (plus about an extra .35 for the neutrik jacks) Still less cubic inches than a dual maestro chassis...

Show me what you got... Be creative... autocad 3d drawings in dxf format please... or solidworks, or cativa.... no lines <.025 inch please.

Starting to think about a completely custom machined knob... Anyone with some ideas ?? The deep engraving is going to be sweet.

I love it when a plan comes together no errors yet, and i think i can probably sail thru the rest... http://gilmore.chem.northwestern.edu/t2chassis1.jpg http://gilmore.chem.northwestern.edu/t2chassis2.jpg http://gilmore.chem.northwestern.edu/t2chassis3.jpg http://gilmore.chem.northwestern.edu/t2chassis4.jpg http://gilmore.chem.northwestern.edu/t2chassis5.jpg current BOM such as it is http://gilmore.chem.northwestern.edu/t2parts2.xls I'm doing a custom radius cutter for the outside from a single blade carbide bit, edm'd for the surface i want. (because I CAN! ) hand drill??? what are you guys nuts??? i'm going to cnc the stax jacks...

I can also make them round and threaded just like the real stax thing. But the diameter is going to have to increase a bit. Time to learn how to cut threads on the NC lathe...

I cheated. Justin came up with the idea. I did not think it was going to work, but it did. I used the macro lens and took a picture at as close as i could get and still have all the pins in the picture. Then i suck the thing into featurecam and tell it the measured dimensions of just 2 of the pins. And it calculates the rest... And damm close too. PDF's of that connector are just plain not available. If this did not work, i could have used the new nikon microscope at work which has guaranteed flat optics and a reticule for exact measurements. justin's way was boatloads quicker. I'm open to suggestions. The harder the better.

So as we all know the amphenol stax connectors are less than ideal, and the real stax ones are generally unobtainable. so i got these guys to sell me just the pins from these sockets CMC--Teflon Tube socket and i evidently got the measurements right on the first try. (well to .0001 anyway) http://gilmore.chem.northwestern.edu/staxc1.jpg http://gilmore.chem.northwestern.edu/staxc2.jpg Was thinking of a dual stax connector made out of some crazy hard wood. Need to find the electrical impedance of hardwoods... Anyone know?? If i can get some more machine time this week i should have a finished amp chassis by saturday.

So thats 9.1 channel surround sound balanced

Actually i was thinking that tuberoller would be the best to supply ventilation... Although i really had two other "HAS BEEN" fat fan boys in mind There are definitely some current fanboys that might work... Tomato comes to mind.

Actually i was thinking of hiring a couple of has been fanboys... Afterall, they have nothing else to do now... Have pretty firm pricing on the heatsinks with machining, and the angle pieces, will post soon.

I have officially joined the ranks of the completely over the top and then some... (346 lbs) http://gilmore.chem.northwestern.edu/hspile.jpg http://gilmore.chem.northwestern.edu/hsindividual1.jpg Front and back should be here tomorrow/monday... Then the tops and bottoms.

Just standard RN60 dales... That does not concern me, i know the exact sizes. Its the 1 and 3 watt resistors that i wanted to be sure of.

Well all the resistors and caps showed up today. I'm glad to report that all the parts for the amp board are the sizes they are supposed to be, and the holes are the right diameter. Neutrik connector really was the right diameter because they are flat blades not round. Will check the power supply board later today. Soon this project is going to take over the house. Anyone know where craig gets his rubber/metal feet with the #10 screws?? I kind of like those, as i plan on 4 of them, not 3 because the thing is going to be so heavy.

Never got off the semi... On thursday its coming on a truck with a lift gate. Will drop it in the driveway, then i get to take the boxes inside myself. Looks like all the metal pieces together will end up about 40 lbs per amp.

atempted delivery today of 346 lbs of heatsinks. I was not home, and not notified that it was coming. Redelivery thursday...

Big SS amp for electrostatics. One really big problem. The age of CRT's is OVER! Why does that matter? No one making really great high voltage parts anymore. 2sc3675's and 2sa1968's are all that is still available. In 5 years, they won't be available either. Then you have to go to a stacked amp to get the voltages and currents you need. Tubes are going to be around for quite a while. Besides which, they are ultra simple.

And the companion amplifier to the T2, the SRX circuit as built by stax (the $12k thing) with help from you know who. Option of the caddok completely non-inductive plate resistors, or the T2 current source. Fits in the same size chassis with the same size power supply boxes... http://gilmore.chem.northwestern.edu/staxsrx2-1.pdf Could be under $2500 in parts total with the good sockets and the DACT. Blows the crap out of the ES1/2... Got to go to a meeting, will glue the pdf's together later... Especially with the caddok current sources, this one is a complete no-brainer to build! Hardly any parts.

You got that backwards. The extremes burn up. Either the transformer, the resistor, or both. They don't explode. Nothing running over voltage that would get them to explode. Its the high voltage mpx things with the 400 volt caps running at over 500 that might go boom. Although none have gone boom yet. Older mpx units with the fet still soldered to the main board will also burn up.