kevin gilmore

the pdf picture sure looks like the alphas who knows who actually makes them

she divorced him. and for really good reasons too. ray is very abusive (no one saw that coming) i'm sure others can point to ray's wedding photo, was on his facebook account... She did not look happy, but hey ray has lots of money. and a couple of expensive and now horribly out of date cars.

when the issue of the juice can caps (laser power supply caps) being wired together, clearly unsafe by the product data sheet, jude took mikhails answer over the product data sheet and deleted all posts... But ray was jude's personal friend so he got special treatment. wonder what jude thinks of rays new barely legal new Asian import wife.

final board file for the transportable just posted http://gilmore.chem.northwestern.edu/boards/SSDynalo-v1-4.zip this is Kerry's work, very amazing

If that has a 10mhz pure sine wave output, then other than power supply and other monitor stuff associated with it, that is all you need. the complete unit actually has the same part in it that is sold on ebay as a module plus the power supply, and likely an output buffer. But the name of the game is 10.00000000mhz (or better accuracy) with a jitter of less than 100 femtoseconds. which my beast actually beats on both frequency and jitter by a fair amount. (one month accuracy verified against a primary caesium beam clock, less than 1 x 10-12 seconds) personally I think this is overkill to the extreme. The only reason I did it was I was given the thing for free, and was challenged to make a 40+ year old monster work to original factory specifications. And i'm supposed to be emptying out the house, not dragging home nonsense like this. But it really is a patek phillipe movement, 19 jewels. A thing of beauty. And a rubidium lightbulb, a magnetic microwave chamber, a rubidium phase splitter etc... Old school

I was going to but then I tried to figure out why I should respond. If someone does not understand that an electrostatic amp is ALWAYS going to cost more than a dynamic amp due to the quantity of parts and the voltages involved, there is no hope. and remember that any of the designs I have released ( 3 of them) that use the emission labs 20B tubes are double or triple the parts cost due to the tubes, makes a T2 seem cheap.

here is my new patek phillipe wrist watch. carefully refurbished, all new capacitors etc... and my new secondary reference word clock

2 or 3 oz copper for the dynalo boards to get rid of more heat

better than a S class!

its supposed to be +/-22V check polarity of all electrolytics could also be a loose ground

extraordinary this is how they should be built.

ceramic insulators with white thermal grease and the appropriate bushing and screw

you want to use one of the linear isolators to drive one side of the bias circuit.

reverse engineering a product has been declared to be legal in the usa. see landmark rulling Emulex vs digital equipment corp. publishing a schematic that you have done is also legal. If you have an original copy from the manufacturer it is not legal to publish it. I don't know about copying an exact circuit board layout. Likely if you have the original gerber files and modify them, probably not a great idea. But if you layout a board from what you see, probably acceptable. lifting code from on board microprocessors may be an issue.

120ma thru 10 ohms is... 1.2 volts at least that is what I remember

got a scope and signal generator? pics of the 2 phases please at about 1vpp

an early version of that board had the ground missing from one of the capacitors. put the opamps in and see if there is any sound change. without the opamps there is an additional feedback loop

if you sds xlr breaks down you ship it to me. With a bottle of scotch. Dead output caps are a problem, but rare, usually the power supply does evil things. Can't imagine anyone else stupid enough to touch it.

i am pretty sure i never had the gerbers for that but i will look. Those are the original circuit, not balanced differential, and use hard to find jfet inputs. best to build one of the new boards

in the usa bdp 80fd, $300 and free shipping. If you have as many discs as I do, works out to 10 cents a disc way cheaper than anything else at the moment

gerber file alpsquad3 in my boards directory. birgir may have extra boards to sell. there were similar things on ebay a while ago.

most of us use the circuit board for the alps quad, so 6 wires including grounds to the pot board, then the pot boards to the amplifier boards, the pot board keeps the left and right grounds seperated

general rule of thumb is that peak unregulated capacitor value is 1.4 x rms output of transformer for a full wave bridge. so 22*1.4== about 30 volts unreg input the regulator needs 4 volts, so you still have 6 volts of overhead to compensate for low line etc. issues with how stiff the transformer are (how much it sags under load) lower the voltage a bit.

has to be the connector you used getting too close to that trace. I can move the trace a bit, in fact I just did, but better to pick a different connector. (not posted yet)

i'm thinking of 2 x 30V but you also might get away with 2 x 28V which I have used in the past, depends on the transformer manufacturer