A "mini-UP"?
Hi. I built a pair of 100W Aleph-X monoblocks several years ago. And while they still work great, i've come to the realization that I don't need that much power. So I came up with the idea of breaking apart my monoblocks into some smaller amps and creating my own homebrew surround setup.
I remembered when I first built my aleph-x monos that grey's original design used 4 output devices to get 35 or so class-a watts into 4 ohms as long as your heatsinks could keep up and you didn't mind pushing your output mosfets to the brink.
I came across this thread and thought I might try this with the U.P. design. My heatsinks are capable, but I'd rather not have to worry about burning up output mosfets, so my goal is a 25 class-a watts into a 4-ohm load using 4 output devices with the U.P topology.
My problem is I don't really have the know how to calculate the appropriate idle current/source resistors/bias voltage for the ouput stage. And will there need to be any modification to the ugs to achieve this result?
Can anyone lead me in the right direction?
Hi. I built a pair of 100W Aleph-X monoblocks several years ago. And while they still work great, i've come to the realization that I don't need that much power. So I came up with the idea of breaking apart my monoblocks into some smaller amps and creating my own homebrew surround setup.
I remembered when I first built my aleph-x monos that grey's original design used 4 output devices to get 35 or so class-a watts into 4 ohms as long as your heatsinks could keep up and you didn't mind pushing your output mosfets to the brink.
I came across this thread and thought I might try this with the U.P. design. My heatsinks are capable, but I'd rather not have to worry about burning up output mosfets, so my goal is a 25 class-a watts into a 4-ohm load using 4 output devices with the U.P topology.
My problem is I don't really have the know how to calculate the appropriate idle current/source resistors/bias voltage for the ouput stage. And will there need to be any modification to the ugs to achieve this result?
Can anyone lead me in the right direction?
i would like to ask something....
could anyone tell me if it would be a good job to put well paired 2sk170/2sj74 fet's instead of the 2sk389/2sj109 combo's....
i think this might work well too - but i like to play safe....thanx....
could anyone tell me if it would be a good job to put well paired 2sk170/2sj74 fet's instead of the 2sk389/2sj109 combo's....
i think this might work well too - but i like to play safe....thanx....
thnx Manu - Zen Mod allready replied to me... heheheh thnx ZenMod....
yes i know - they will be matched....
yes i know - they will be matched....
Cheff,
Has anyone tested the U.P. amp for offset without using your correction circuit. I would be very interested to know how the initial design measured.
Tad
Has anyone tested the U.P. amp for offset without using your correction circuit. I would be very interested to know how the initial design measured.
Tad
Hi Mark, could you help us to get the boards when we would take 8??
hope is coming up......
If I recall right the gerbers are here :
Les Gerbers :
http://psykok.homelinux.org/diy/UP/V2/GerberUPV2.zip
quoted from :
Youpi, on passe à l'U.P.
End of the post ...
Manu
Les Gerbers :
http://psykok.homelinux.org/diy/UP/V2/GerberUPV2.zip
quoted from :
Youpi, on passe à l'U.P.
End of the post ...
Manu
Hello ZenMod,naah ....... here they are
You seem to be everywhere. In christmas holidays I will buy your pumpkin with your package and I `ll report you!
Did you build this UGS thing?
please .... don't report me !!!!
you are asking almost official Papa's orphan (OK - just mentally
) did he build something from Papa ?sometimes I feel like I'm not able to leave that devil's circle ...... ant think outside of it
luckily there are two things to help me - da Toobz , and that I'm too wakoo to keep any prototype in use longer than 1 month .......
please .... don't report me !!!!
you are asking almost official Papa's orphan (OK - just mentally
sometimes I feel like I'm not able to leave that devil's circle ...... ant think outside of it
luckily there are two things to help me - da Toobz , and that I'm too wakoo to keep any prototype in use longer than 1 month .......
Danke Zen Mod,
Ich habe sehr gelacht und werde Dir nur meinen Tod berichten!