[goldenreference low voltage power supply]

Any plans of high current GRLV? Current version limits to 1.5A

[Balanced to unbalanced board]

On 2017/1/28 at 10:33 PM, kevin gilmore said:

unbalanced to unbalanced, gain of 1

unbalanced to balanced, gain of 2

 

is it possible to make BAL-BAL into zero gain? Just like SE-SE, it's unity gain (When BAL-BAL is 0db gain, SE-SE is -6db gain, is this correct)

[Kevin Gilmore Circlotron Output, Large Enclosure [high-slew] Electrostatic Amplifier]

On 2015/7/3 at 7:48 PM, kevin gilmore said:

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)

 

Regarding those big caps on the fat HV carbon board and the circlotron 900V board

Here's the list per ear

fat hv
550v 680uf  *2  in parallel = one 550v 1360uf

circlotron
470uf 550v  *2 in series = one 117.5uf 1100v
470uf 500v *2  in series = one 117.5uf 1000v
here's one set, per channel needs two sets
---> and then = two sets = two 117.5uf 1100v + two 117.5uf 1000v (these four caps are separated)

I met a resident in my building, according to him, he owns a small house to produce caps, consumed caps up to 2.8kv whatever normal value, is it a good idea that I order
two 550v 1360uf
eight 117.5uf 1100v
for the circlotron? Now it's 10 caps instead of 20

 

On 2015/8/27 at 0:45 AM, kevin gilmore said:

10 ma for the driver is more than enough.

needs to be 3 transformers, 2 of which have 4 windings of 380vac each

the other is the kgsshv-carbon transformer

 

 

Shouldn't be 360vac?

[Balanced to unbalanced board]

On 2017/1/30 at 4:18 AM, kevin gilmore said:

the way the board is layed out currently its really input -> attenuator -> ubal/bal -> diamond buffer because there is only one set of servo's

and the attenuator is best at something like 10K

 

is this input + output board + attenuator also the same as here? Or put the attenuator in between the two boards?

https://www.head-case.org/forums/topic/12024-and-now-for-something-completely-different-part-3/?page=6#comment-724017

 

BTW, about these output boards, the orginal one and the newer one, could we wire them to output SE signals?

 

[Kevin Gilmore Circlotron Output, Large Enclosure [high-slew] Electrostatic Amplifier]

On 2015/10/4 at 11:35 PM, kevin gilmore said:

so the default would be 25ma on the output stage and 15ma on the driver stage

so 90 watts for the output stage and 54 watts for the driver stage (both at 900/450v)

plus what ever differential on the power supply so close to 200W is probably right

 

Hi there, speaking of CREE driver, here's a pricy edition of c2m1000170d
still 1700V, but rates at 72A

http://www.mouser.com/ProductDetail/Wolfspeed-Cree/C2M0045170D

Will this high current version be stable at 100ma or even 200ma? (Maybe at that level, have to mate with a $$$$$ source to hear the small difference compared to 25ma)

Looks like there will be higher voltage CREE driver coming out in the future, let's say, 2.5kV 5A (HV version of c2m1000170d), is the 2.5kV Cree driver still have benefits in the design, ie. of the electrostatics amps?