kevin gilmore

Maybe Summer Glau's performance might change things. Maybe not.

mikhail taught him..

Yep. I think the problem is actually getting stamping time at the manufacturing plant, but who knows why this is taking so long.

At this rate the one year subscription will take about 5 years if you include the other 2 sets.

Tyll seems to have a thing for sushi and booze. And immaculate 3 piece suits.

The chairs are even better. herman miller aeron's... The rooms are sound wise completely dead. If people want, a room with speakers could be next door, and as long as the door is closed you can't hear it even next door. And the networking is stinkin quick. Although we were not the ones paying for it this time. Not sure how much it is really going to cost if we want the up and down speeds we were getting courtesy of the physicians next door. I will however say that the lighting is a challenge for taking pictures. The lights flicker at some very high rate and it throws off the automatic metering systems of most cameras. So without a flash, the pictures come out a bit dark, and with a flash they are over-exposed. So far that room got me twice. It won't get me a third time...

Consider my ass spanked severly. It won't happen again. It may already be too late, in which case that is OK.

board files for the amplifier board just shipped to pcbnet to be produced. The amp board should be $93.32 + tax (i'm in illinois, no way around this) +shipping. Still have a bit of work to do on the power supply board.

Well we discussed whether the picture would stay or not. There are other pictures there of people in those t-shirts that are still there... What?? I can't have a little fun once in a while.. Once every 4 years seems ok... The entire CJ010 crew are active head-casers.

since it was deleted from over there... http://gilmore.chem.northwestern.edu/chiunify7.jpg

quick pic that explains the concept http://gilmore.chem.northwestern.edu/nc3fdh.jpg Correction... There is a switch on the amp board that connects amp ground to the neutrik ground pin for those situations where it is necessary. Like using the xlr for single ended inputs. The outside of the xlr connector is connected to chassis ground.

Neutrik nc3fdh connectors. Go look it up on their website. krell uses a lot of these. you solder the inside piece to the circuit board directly. Then insert thru the panel, add the outside piece, and then there is a slot for a small screwdriver that locks them together. craig also uses them on his BA. The one hole that is missing on the back panel is the hole for the ground wire which connects thru the umbilical cable to the same place on the power supply. Everything floats inside both boxes to get rid of any ground noise. There is a switch on the amp board that connects amp ground to chassis ground for those situations where it is necessary.

amplifier back panel. The amphenol power jacks can mount on the inside as shown, so you can build it and wire it and then bolt it to the back panel from the inside. Makes taking it apart if necessary a breeze (something mikhail needed to learn). And the neutrik's are in 2 pieces too... http://gilmore.chem.northwestern.edu/t2chassis13.jpg

I think that there will be a couple extra circuit boards... Will know next week when i decide how many to buy.

Those are temporary vintage feet. Still hoping that craig can get some more of the feet i really want without having to buy 5000 pieces. Weight of amp chassis 15.56 lbs...(no circuit board, or tubes or other parts) power supply would be the same plus 7.5 lbs of transformers (plus parts)

Time to show off my bottom (err... panel) http://gilmore.chem.northwestern.edu/t2chassis12.jpg Top and bottom of the power supply box will look similar.

So on the original T2, there are a lot of .5 watt resistors on the bottom of the board, lots of holes, lots of internal heatsinks, tubes completely inside, no ground plane of any kind, and the exterior gets to 55C. The inside gets to more like 75+C. On my T2, everything that generates more than .5 watt (with 2 resistor exceptions) is mounted directly to the heatsink. While more holes in the board is probably going to be a good idea, the tubes generate thermal flow that will pull air thru the unit. A thermal design program i'm playing with basically indicates that more holes is not always a good thing as it reduces air flow. I gave the board layout to the master (justin) and he will do some cleanup. Otherwise in less than 2 weeks i'm going to send the boards out.

The file is in a place i can't get to from here at the moment, but i'm pretty sure i can convert it to dxf format and send it to you... Tomorrow, first thing. You do know that nothing in this world is ever perfectly flat

You get that look with a specially made fly cutter, taking off about .00005 inch. MOAR HOLES http://gilmore.chem.northwestern.edu/t2chassis11.jpg

There is another school of thought. The school of minimum distortion. Each tube has a particular set of curves and distortion at various voltages and currents. There is no one rule that fits all. You can usually figure it out from the plate curve characteristics but not always. Triodes are much easier to do this with. Typically 60% power is the right number. Tetrodes and pentodes, and especially beam power tetrodes have to be tested, but generally the numbers end up 90% of full power.

I have no idea how to do that. But i do know someone that does... yep, fits perfect, the 9 pin sockets are flat with the top and the octals stick up about .125 http://gilmore.chem.northwestern.edu/t2chassis10.jpg New top panel with MOAR holes on monday

I think the T2 will be on the front panel with an understated look... Otherwise it ends up looking like the overblown crap from my friend in skokie... What i want to see is what the surface looks like from the high pressure water cutting machines. In the end i will probably still machine it... Nothing seems to beat the perfect edge of a sharp carbide bit. Still have no idea whether i'm going to anodize or power coat... Have a couple of small pieces of the extrusion to send out for testing... Found a company that will polish all the pieces, they do a lot of work for Fermilab... Relatively cheap too, but they just polish stuff, they don't do the rest of it.

Drawing in DXF format or it will never happen Same number of posts here as there

But milled holes are so much prettier... .005 countersink... Fine... More Holez... Shop is getting a brand new laser cutter next week. Evidently it can cut at the rate of 1 inch per second in .5 inch material. Much faster in the .125 stuff i'm using. So i think one more circle of holes around each tube, then ... well i don't know yet, creativity is zero at the moment... Quite exhausted... And stinking of that milky white water based machining lubrication crap.

http://gilmore.chem.northwestern.edu/t2chassis9.jpg tomorrow i'll drill holes in the fake circuit board and mount the sockets and see what that is going to look like. So far i'm very happy. It really does not need more ventilation holes as all the hot stuff is on the heatsink. May add some more holes to make it look purdy... 32 machine minutes to do this including the edge...