kevin gilmore

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.

that is what the megatron is. twice as many output tubes. floating filament. harder to fully dc couple.

Nothing prevents you from taking any of the kgsshv power supplies And jumpering then for ccs,Zener,pass fet mode. This simplified mode has always been in these supplies from the start With the ixys parts.

frank wins. frank usually wins.

like this http://gilmore.chem.northwestern.edu/myesx30.jpg

money sent. not paying attention.

AM reception!

if it wasn't for the transformer fiasco and the 100% failure rate on extremes because of that Mikhail might still be in business. I still don't understand why no one builds a similar product.

does anybody really know what time it is

a pair of 120pf caps rated 500v or more stator to bias to stator

the 300v is made from the 500v with a resistor, or a separate supply. I don't remember about the current limit at the moment, will have to look that up later.

then you want a pair for balanced, one for each foot.

That's not the esl57 rig. That's the esl63 rig, and its in England, not Germany. the original esl63 panels were white plastic. the esl57 panels were gray with a wood outside.

That was the other possibility

looks like early joni mitchell

Love him or hate him or his products, certainly a major force in the industry http://web.mit.edu/newsoffice/2013/obit-amar-bose-0712.html

The penny & giles pots are great too. also rk50 pricing these days. The $5k JC parasound preamp uses a rk27. pretty sad. my 8 bit digital step attenuator seems more rational.

Paging Steve to the DIY T2 thread

the goldpoints are not enough steps, and are not 2 resistor shunts. same thing with the dact. that is if you want to be completely anal about it.

you can't get a ldr to track right. no matter how hard you try. even with multiple elements and extra feedback. plus the issues with low level non-linear behavior.

its not that those switchers are necessarily the wrong thing, i'll be that there is ultrasonic noise coming out of them that takes special equipment to see, its that the thing is enormously big for no reason. The original 2 box solution seems more rational. All the electrolytics likely get rid of any of the ultra high frequency noise. Now i'm certainly not one to pick on someone for excessive overkill but mine is going to look as close to the original just because I can. Complete with the rounded corners and the massively thick and machined front plate. Anodized two tone. The build job is still very nice, and the 4 pin headphone jack is what I intended.

seeing how they are built, if I had the time, I could design and build one that would never ever fail. Would have pure silver contacts et all. Would probably take 2 hours per section to assemble. Plus silly amounts of time to cast the silver pieces.

I spent over $4.5k with the rk50 pot. but its easier not to pay attention to those things. If I actually paid myself my standard consulting rates for labor, the price would be stupid.

well if you are doing balanced and the inputs are separated by a distance you might want to separate the grounds into left and right. that kind of thing.