kevin gilmore

the current hv power supply is a dual board designed for one channel depending on how you assemble, you can put some of the terminal blocks on the back of the board, especially if mounting vertically. so you could put the output stage board right next to the power supply board and put the power connectors on the output stage board on the back for very short wiring

you need 4 x 900v floating power supplies (could split into singles if it makes more sense) 2 x 450v ground referenced power supplies (likely the fat power supplies) 2 x 15v ground referenced power supplies (on one of the fat power supplies) 1 x bias (on one of the fat power supplies) board files posted circlotronhvpower.zip kgsshvcarboncirclotron.zip kgsshvcarboncirclotrondriver.zip

how to get it in the box, I don't know for sure yet. what I do know is that I have the opto bias working perfectly and a stereo prototype that I can listen to. (well at least on the bench, no way to move it) its flat out amazing. As much fun as listening to the T2 for the first time. did some testing at 1kv peak to peak into 50k(50w) in parallel with 470pf. just fantastic. till the cap exploded at 20khz. switched to the 1kv rated terminal blocks which are a fair bit bigger, but not much more money. as far as I know the only push pull solid state electrostatic amp ever. (parts for togte are not available) output board schematic http://gilmore.chem.northwestern.edu/circlotronoutput.pdf board size 5.45 x 4.05 inches driver board same as kgsshv-circlotron with a few resistor changes picture http://gilmore.chem.northwestern.edu/kgsshvcirclotrondriver.jpg board size 5.45 x 4.05 inches picture with the 1kv rated terminal blocks http://gilmore.chem.northwestern.edu/kgsshvcarboncirclotron.jpg likely going to use the other opto to make a safe current monitor new power supply picture with the 1kv rated terminal blocks http://gilmore.chem.northwestern.edu/circlotronhvps.jpg board is 7.45 x 6.48 inches also you need the 2 x fat power supplies thinking of 3 transformers, 2 of which have 5 hv windings (4 for the 900v and 1 for the hv supply) and then one small transformer for the +/-15 supply

yes I have to to get it in the box but currently the 900v supplies are too big not sure what to do about that yet the 1kv connectors are huge, but have not found suitable wire yet. the 5kv wire is a bit hard to work with.

its an ultra quiet and extremely stable power supply. the on board version is suitable for just about anything however, does not care. kind of overkill for kgsshv etc but there still is nothing better. how many are interested in this? http://gilmore.chem.northwestern.edu/kgsshvcarboncirclotron.jpg

yes, and most of them are completely clueless. its going to get worse. i just posted the final schematic for the circlotron output board, and will probably have a board layout by monday. 350 volts per microsecond!

for the kgsshv that opto servo has at least half the peak to peak range. reason it exists is that its used as the current control in the latest version of the circlotron. thinking of applying latest ssdynalo design elements to the dynahi but thats going to be a bit. in other news, this is likely the final circlotron output stage, output stage current setable with a pot. http://gilmore.chem.northwestern.edu/circlotronoutput.pdf and then this http://gilmore.chem.northwestern.edu/kgsshvcarboncirclotron.jpg lots of realignment work to get this to match the driver board

for the megatron, the two tubes are in series and warm up together (well close) so there is not going to be a big bump

cleaned up schematic for both versions http://gilmore.chem.northwestern.edu/kgsshvcarbonproduction.pdf

for megatron this may not be a great idea because the boards will trigger at slightly different times causing a huge output bump into the headphones if they are connected.

that is just one of the caps, there are 4. so up to say 500 joules

old power supply (per rail) (just the unregulated primary) 680uf x 2 caps in series, about 600v. total energy storage 61 joules new power supply 500v 1 x 680uf cap total energy storage 85 joules so you can certainly get away with 470uf which is 58 joules and that one is only 60mm high but if you are insane, you can go with the 1000uf cap which is still 40mm diameter but 105mm high and get 125 joules I'm clearly a fan of overkill, but 125 joules is in the range of a heart defibrillator (memories of Mikhail and his 4700uf/450V juice can caps) run at almost 500v and then he put 2 In parallel

version 3 board ready for testing slightly updated servo schematic the taller caps are really useable in 3U boxes

i have finally come up with a better servo, joamat and kerry had some really good ideas, but referencing the minus rail causes issues, and then there is the overhead voltage of the system. so here is something that i think is better because the reference is ground. http://gilmore.chem.northwestern.edu/newservo.pdf the circlotron needs a bigger chassis than that. and its probably too big for the carbon, but sure why not. going to look into transformers very soon.

its one small sink that holds both of them. http://gilmore.chem.northwestern.edu/fatright.jpg

a lot of people don't lift the resistors slightly off the boards, and cause trouble. i can certainly put the ground plane back in if people want it, but the design is very tight and short, so probably no reason to. here is what the ground plane would look like with 30th clearance, there is no way to do it on the bottom. http://gilmore.chem.northwestern.edu/kgsshvcarbonv2.pdf takes 5 seconds to put it back on the board if people want it. no way to get to the ground pin on the ground plane for the hv power supply connector

with the fat power supply boards, definitely fits in this one http://www.ebay.com/itm/NEW-DIY-BZ4309-Full-Aluminum-Enclosure-power-amplifier-box-dual-heatsink-chassis-/261938269078?pt=LH_DefaultDomain_0&hash=item3cfcbccb96 iec hole already in the back panel

the fat supplies are now exactly the same size as the amp boards all the mounting holes in exactly the same place. 5.45 x 4.05 inches fits in the dissipante 2U box with the boards mounted horizontal with ample room for transformer, or 3U box with the boards mounted vertical, and even more room for the transformer. the skinny supplies are 3 x 6.5 inches which is a tougher fit in many boxes.

that is unnecessary but i could probably do it. the result would be that those parts would get hotter. i have updated the fat boards to be exactly the same size as the amp boards, makes doing the bottom panel easier with the fat power supply boards, definitely fits in this one http://www.ebay.com/...=item3cfcbccb96 iec hole already in the back panel

if you have the time check every one of them, but all i did was change a couple of silk screen labels, and a couple of .6 resistors into .5 which are easier for people to bend. the others are just cut and paste from the original

too much variance in the parts so you measure the voltage across the testpoints which is a 150 ohm resistor. 3 volts == 20ma

you would be surprised how little time these boards take to make. but but but ray samuels says that gerber files are tens of thousands of dollars each

here you go http://gilmore.chem.northwestern.edu/alpsrk50.jpg http://gilmore.chem.northwestern.edu/boards/alpsrk50.zip

one pair of amp boards and one pair of fat power supply boards or 1 dual power supply board.

done, all 5 versions of the power supply fat versions are 5.45 x 4 inches now to find 3U narrow box the fat supplies would work in the 2U next to the amp boards here it is with the fat power supplies in the 2U dissipante chassis http://gilmore.chem.northwestern.edu/chassis2.jpg