Something like this :http://www.diodes.com/datasheets/ZXT790AK.pdf
There is also an NPN and other types that are similar.
I think BD139, 140 would work as well.
There is also an NPN and other types that are similar.
I think BD139, 140 would work as well.
Why not a mosfet cascode with IRF610/9610 (or some thing). I have been doing testing with these and they are very usable for this purpose (and happy to disipate a bit).
Yes BD139/140 will do, they are fast have good Hfe and can disipate enough.
That is nice, my tablet PC has the network name 'Colossus' (and it controls the Hifi/MediaCenter), I will have to see the complete movie (again) some time quick.
I saw the movie more than 20 years ago and I was startled.
I was reading I Robot.... In those days I believe in the three laws:
1.A robot may not injure a human being or, through inaction, allow a human being to come to harm.
2.A robot must obey the orders given to it by human beings, except where such orders would conflict with the First Law.
3.A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.
But now "killer robots" appeared so these laws are purely Sience Fiction.
Now NASA is emulating brain activity with silicon....
I saw the movie more than 20 years ago and I was startled.
I was reading I Robot.... In those days I believe in the three laws:
1.A robot may not injure a human being or, through inaction, allow a human being to come to harm.
2.A robot must obey the orders given to it by human beings, except where such orders would conflict with the First Law.
3.A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.
But now "killer robots" appeared so these laws are purely Sience Fiction.
Now NASA is emulating brain activity with silicon....
this here is a picture of Colossus at work Attachments
This is a heavily damaged one that I got of eBay, I got a pair of them for 1000US and shipping to here was handled for flight cost only by a friend of me. My own 2 panels look mint, but one of the low-range-speakers is non-functioning, it will be replaced by the 'American'-spare
. The 'American'-spare is currently in the system to test/evaluate it, these panels 'Carver Amazing, Platinum Edition' are now more than 20 years old, but I have 4 spare magneto-stats in the 'American'-spares . The sound is nice mellow and real loud as needed (one American magazine claims the have gone to 118dB).This is a good/nice read: Carver Amazing Loudspeaker (Platinum Edition) | Stereophile.com
Good catch
yes it is actually giving the right circumstances it will do a few light years more. The guys from ATL sometimes play tricks when controlling my system from their home (go figure). I never give them my passwords again
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Here is some good information about depletion mosfet CCSs.http://www.waltjung.org/PDFs/Sources_101_Letter_Revisit_0409.pdf
I watched that Forbin film yesterday night, pretty cool.
i also like Fasbenders "Welt am Draht"
I watched that Forbin film yesterday night, pretty cool.
i also like Fasbenders "Welt am Draht"
I loved the 2-tone versions of the Amazing, blue cloth & wood frame(ash?) and the blue/black combo.
A Jimmy-B good instead of a Carver spaced-out power amp, what heresy !
Look better than Apogee, and most certainly sound better
(Faustrecht der Freiheit, 1st Fassbinder movie i saw, ZDF or 3er netz on TV, mid '70s. Very impressive, and with pretty footage of a DeTomaso Pantera GTS)
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Got some nice R-Cores from Japan. They are not cheep though. Over 100,-€ per pc. plus tax and shipping. They are 30VA and give a plus-minus 18V DC supply.
Can be used for the Paradise.
On a another planet i have improved my Transimpedance Tube Phonostage. Noise is now equally low on both channels. One input tube was noisy and had to be replaced. Hiss is surprising low now, enough for my Titan i. I was able to reduce the hum too but i am still not 100% satisfied.
I found that the sound improved a lot when i took away the metal shielding cylinders on the input tubes. There was a glare that is gone now. They do not much for shielding ether, quite the contrary to my surprise.
Can be used for the Paradise.
On a another planet i have improved my Transimpedance Tube Phonostage. Noise is now equally low on both channels. One input tube was noisy and had to be replaced. Hiss is surprising low now, enough for my Titan i. I was able to reduce the hum too but i am still not 100% satisfied.
I found that the sound improved a lot when i took away the metal shielding cylinders on the input tubes. There was a glare that is gone now. They do not much for shielding ether, quite the contrary to my surprise.
Attachments
Cool r-cores JG... any hint on how to get some of those ?
News about TS ? (I will build it for sure)
Hi Frans
Like your mention to Keith Laumer
maybe we need to call for Magnus: https://www.google.pt/search?hl=pt-...2_DJPS4QSRhIGYBA&q=magnus robot fighter&tbo=d
PS: Outstanding speakers.... better than Apogee ?
News about TS ? (I will build it for sure)
Hi Frans
Like your mention to Keith Laumer
maybe we need to call for Magnus: https://www.google.pt/search?hl=pt-...2_DJPS4QSRhIGYBA&q=magnus robot fighter&tbo=d
PS: Outstanding speakers.... better than Apogee ?
Hi there Joachim,
did you published the circuit of your Tube-Phonostage - where? I´m quite
interested about it. And if you didn´t please do
Greetings Ulf
Ulf, i did not publish the tube phono and will not do in the future out of good reason.
There is lethal voltage inside and even me had a hard time to make it work properly.
Also i am totally occupied with work. One is to support the Paradise.
One problem is to select the tubes. Maybe only 4 out of 10 are good enough. Also the circuit is very high speed and can go into oszillation fast. Tube swapping is absolutely forbidden. It works only with certain, selected tubes. If the builder decides on other tubes the result will be totally out of my control and that will happen.
I am willing though to play that stage for visitors. It is a one off anyway. I build it as reality check to find out if tubes sound better. I can already say that this stage sounds different then my solid state stages. It has tremendoes speed and energy, especially when an event starts. It really draws the attention when a singer starts to sing or when an instrument starts to play. On the other hand the sound is not that super clean, giving an impression of a certain brownish-golden texture bordering on the slightly hollow and velvety. The solid stage ones also resolve detail better and focus more tightly.
I would say the solid state one win slightly.
The TS on the other hand may make it into something you can build. Basically it is the same topology then the tube stage, single ended, tranconductance input stage, transimpedance RIAA and buffer, single supply, capacitor coupled. It may sound more similar to the tube stage then my other parallel symmetric, direct coupled designs like the Paradise.
There is lethal voltage inside and even me had a hard time to make it work properly.
Also i am totally occupied with work. One is to support the Paradise.
One problem is to select the tubes. Maybe only 4 out of 10 are good enough. Also the circuit is very high speed and can go into oszillation fast. Tube swapping is absolutely forbidden. It works only with certain, selected tubes. If the builder decides on other tubes the result will be totally out of my control and that will happen.
I am willing though to play that stage for visitors. It is a one off anyway. I build it as reality check to find out if tubes sound better. I can already say that this stage sounds different then my solid state stages. It has tremendoes speed and energy, especially when an event starts. It really draws the attention when a singer starts to sing or when an instrument starts to play. On the other hand the sound is not that super clean, giving an impression of a certain brownish-golden texture bordering on the slightly hollow and velvety. The solid stage ones also resolve detail better and focus more tightly.
I would say the solid state one win slightly.
The TS on the other hand may make it into something you can build. Basically it is the same topology then the tube stage, single ended, tranconductance input stage, transimpedance RIAA and buffer, single supply, capacitor coupled. It may sound more similar to the tube stage then my other parallel symmetric, direct coupled designs like the Paradise.
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