kevin gilmore

this matches the current board http://gilmore.chem.northwestern.edu/kgsshvproductiondualmot.pdf send me the chocolate

Don't forget the titanium hammer with the 24k gold replaceable tapper which was shown at CJ010. I specialize in goofy.

sure because as soon as the amps turn off, the bias heads to the equivalent of about 900 volts as the output caps discharge. that power supply is a real piece of work.

that explains the fried resistor.

I got my boards Friday, thanks

birgir did that, and I never checked it.

You mean open loop buf634 driving drv134?

2sa1486 has exposed collector on the back side. and extra capacitance from metal screw on t2 definitely an issue in all of the current sources where they are used. also capacitance is an very important issue for the 2sc3675 in the battery.

One other thing to point out, the shoulder washer does not work for The to126 anyway.

Actually it was more like 650 volts where they blew thru on the Original t2 power supply. Pictures were posted. Unreg primary On the anode of the current limiters. The same would be true For the bias current source. The Polyphenylene Sulfide ones are the only ones actually rated for the voltage and they are an impossible fit for the 2sc3675. This, but like I said, a very tight fit http://www.futureelectronics.com/en/technologies/electromechanical/thermal-management/thermal-tapes/Pages/1303239-7721-3PPSG.aspx?IM=0 The cap head version of the peek screws are just about impossible to overtighten. I have tried. Also a fair amount less capacitance to ground. For the 2sk216 and 2sj79 definitely a good idea.

That's the wrong part number and those are not rated for 500v. I had one punch Thru. There are versions that are rated for the voltage but they don't fit the Required transistors for the t2.

peek screws are absolutely required for T2! and a really good idea for all the ixys parts

you should check the values of the 100k feedback resistors. the only possible way that resistor could burn up is lots of current coming back from the outputs thru wrong value feedback resistors, then thru the 200 ohm resistors.

assuming Kerry's boards work, and i'm sure they will, this is going to be a great solution for the off board amp especially as it has the servo on it. Not as flexible and 450v only. But you gotta give somewhere to get down to this size. Probably can squeeze the whole thing into a srm727 size chassis. Very sweet. all of these boards are getting harder and harder for many people to build. goes with the territory I guess. perfect solder jobs are going to be required in the future.

that gonna cause some trouble. better replace the resistor, the led and the transistor. and hope the input fet is still ok.

no the original board won't fit. the board was shortened .3 inch and the front tube section was moved .3 and all the transistor mounting holes for that section was also moved .3. So the brackets are also different. The reason is that lil-knight is using heatsinks that are 400mm long and that is all he can get.

http://gilmore.chem.northwestern.edu/squarewaveproduction.pdf http://gilmore.chem.northwestern.edu/squarewave.jpg this is the board lil-knight is producing The nominal current with the 1.5 inch high heatsinks is 80ma with the 2.5 inch high heatsinks you can go to 100ma pot and 75k resistor are designed so that you can't over do it.

You can probably change R36 to 100k. If you go any higher you might have to change C1 a bit. You can probably leave everything alone and use a 50k pot.

The servo has finally been tested and has a 15 volt range with the 10k resistor as labeled. If you change the 10k resistor to a 5k resistor , it has a 30 volt range.

If I am willing to wait another 60 to 90 days I can get a new pair. I have already been waiting since may. Not real happy with The promised delivery dates.

I think the newest version of the coupe (xkr-s) is one of the sexiest cars I have ever seen. But I would never own one again. Not even as my 5th car. Tata motors, you gotta be kidding.

I paid for them months ago. I am tired of waiting for the headphones. I am tired of waiting for my 80 inch 4k full array LCD tv And the server that goes with it I am tired of waiting for my 2014 corvette C7 convertible Getting too old for this

I have not started on the board yet. I wanted to get a few more things done first Like the squarewave

thermal epoxy is the best. otherwise a drop of thermal grease and cable tie or similar

NO. The 270 volt zener is to protect the 400v pnp transistor. if that is the one you are using. you can leave it in circuit for the 600v transistor. you short it out for the simpler version of the power supply.