what else could I do with them, apart from using them in the Zen V9. Which is what I'll use them for.
How about a current source for a phase splitter? (Tube amp) Or won't they be a major upgrade compared to say a DN2540 mosfet?
Or maybe a dac output stage? I've been thinking of building an active output stage in my RAKK DAC so that I can switch between passive and active depending on the CD..type of music or whatever.
The datasheet
http://www.lovoltech.com/pdf/LU1014D.pdf
And please no jokes about making a laptop power supply 😉
How about a current source for a phase splitter? (Tube amp) Or won't they be a major upgrade compared to say a DN2540 mosfet?
Or maybe a dac output stage? I've been thinking of building an active output stage in my RAKK DAC so that I can switch between passive and active depending on the CD..type of music or whatever.
The datasheet
http://www.lovoltech.com/pdf/LU1014D.pdf
And please no jokes about making a laptop power supply 😉
Bas Horneman said:
any sort of CCS will be waste,without any gain in performance of sayed CCS (sink or source ,whatever)
why don't you just make one nice laptop PS? ?
I'm trying to figure out how to cascode it and with what to cascode it simply.....to use it in anything besides for some nice little headphone amp
Well...I wanted to tell you how to do that..but because you suggested I build a laptop PSU..I won't..
Bas Horneman said:
aaaaAAAAAArrggghhhhhh....😡😉 😀
bas-you know your s#h$i%t with tubes....just think SRPP,or white or mu follower........thats route for voltage deficiency of LU.....
you know how to bias it,you know how to look t graphs,what you need more?
besides real need for another weeny SS amp........
I'm in a process of imaging last pieces of Babelfish hardware...and I didn't make nothing with tubes for too long time.......I need now to make something vacuum state based,even if I have dozen of LUs...
hehe,make WOT preamp instead
Here is an example of a cascoded n-channel mosfet the 2,4k resistors are gate stoppers to prevent oscillations.. I suppose the jfet would need them as well..the 1.5k drain stopper can go...
I'm just a simple cut and paste builder.
An externally hosted image should be here but it was not working when we last tested it.
Looks like I've fooled quite a lot of folks out there 😉
I'm just a simple cut and paste builder.
What about building a quasi-complementary output stage based on the Lovoltech JFETs? Maybe the Yamaha B-1 schematics could give you ideas? You will maybe loose that "triode operating point" of the ZV8 and ZV9, but you might gain some more juice. And maybe a lower electricity bill... At least if you run it class AB. Or variable bias like the 400A... 😀
Rolv-Karsten
Rolv-Karsten
Thank for the suggestion Rolv-Karsten, but that would be way...waaay out of my league. Since I know absolutely nothing about solid state. Except how to use a voltage regulator. I'll wait for someone to design, build and tweak something...that I can copy.
like I say-I can't see any gain in using LU in place of any decent bjt or mosfet in CCS....
LU have too small voltage margin for something like that and it's sorta "toomuchmoony" device ...... just kidding.....but - same as you place 1A fuse in circ where Iq is 975mA
LU have too small voltage margin for something like that and it's sorta "toomuchmoony" device ...... just kidding.....but - same as you place 1A fuse in circ where Iq is 975mA
Bas Horneman said:
You're welcome.
🙂
I have barely thought the idea. It should be possible. But I am really unsure if it's worth it. As I mentioned, the reason to use this power JFET as used probably is that it has a triode-like characteristics, operated as in the ZV9. Operated in "my" quasi-complementary configuration, this might not be possible, I haven't looked into that at all, so I do not know. And then it will be just another power amp. Probably it should be JFET from input to output, also. But this should also be possible. As the electronics component industry is not looking fixedly at the audio designers, but rather at computers and the like, we cannot sit down and wait for a complementary p-channel either.
Just a few ideas...
Rolv-Karsten
choky said:
Why not? 😉
For me it can be powered by white mice running on a treadmill, as long as they get their lunchbreak, cheese three times a day, and are allowed to the toilet. And yes, that it sounds good!
Anyway, must think more (on the quasi-complementary output)....
😴 😴 😴 😴
It would be nice to see the input noise of this giant fet - a possible new SOTA for moving coil preamplifier if 1/f noise is low enough
Bas Horneman, do you know if a voltage regulator could be used for the following application that I have been asking about at numerous discussion sites? Could someone give me some pointers as to what I would need, if anything, to replace the microphone and headphone jack on a 9 volt operated audio communicator like the one at http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=LBC6K
with - so that I could hook them up to the CY8C27x43 PSoC(R) Evaluation Pod (EvalPod) at
http://app.cypress.com/portal/serve...ID=285&PageID=552&shortlink=DA_857264&ref=sch
? The best that I can describe the devices that I believe that I need is as 1) one that translates measures of electricity used to power speakers on one line into varying resistances that can significantly drop the the voltage of another 5 volt line, and 2) another device that translates changes in the voltage of one line having a maximum of 5 volts into voltages in another line comparable to the voltage levels generated by a microphone. Am I right in thinking that I would have to interrupt the battery connection on the audio communicator with a relay that was also connected to USB MINI-B ground and one of the analog M microchip pins? Also, could someone tell me where I could find instructions on and examples of how to write a program that can generate, selectively recognize, and ignore different simple audio patterns that will be sent to and received from this USB peripheral that I am working on? I’m a beginner and could use some help.
with - so that I could hook them up to the CY8C27x43 PSoC(R) Evaluation Pod (EvalPod) at
http://app.cypress.com/portal/serve...ID=285&PageID=552&shortlink=DA_857264&ref=sch
? The best that I can describe the devices that I believe that I need is as 1) one that translates measures of electricity used to power speakers on one line into varying resistances that can significantly drop the the voltage of another 5 volt line, and 2) another device that translates changes in the voltage of one line having a maximum of 5 volts into voltages in another line comparable to the voltage levels generated by a microphone. Am I right in thinking that I would have to interrupt the battery connection on the audio communicator with a relay that was also connected to USB MINI-B ground and one of the analog M microchip pins? Also, could someone tell me where I could find instructions on and examples of how to write a program that can generate, selectively recognize, and ignore different simple audio patterns that will be sent to and received from this USB peripheral that I am working on? I’m a beginner and could use some help.
Hallo jasonbe,
I'll see if I understood what you asked first. Because it you are asking a lot of questions and I'm not sure what you are asking.
So maybe it would be better if you decide exactly what you want to do, then tell us what it is you want to build.
Break that into separate questions and ask them one at a time.
I'll see if I understood what you asked first. Because it you are asking a lot of questions and I'm not sure what you are asking.
So maybe it would be better if you decide exactly what you want to do, then tell us what it is you want to build.
Break that into separate questions and ask them one at a time.
What about a nice little zero feedback impedance amplifier ala Susan Parker/Sheldon here: http://www.diyaudio.com/forums/showthread.php?postid=1228068#post1228068
It's built, tested & measured - what more could you want?
It's built, tested & measured - what more could you want?
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