intense-tavada: I noticed your combination balanced and unbalanced inputs. How did you wire this up, straight through or with impedence matching transformers or what? ( http://www.diyaudio.com/forums/attachment.php?s=&postid=1078032&stamp=1165779072 )
That is a very nice looking system. Are those speakers DIY or off the shelf?
That is a very nice looking system. Are those speakers DIY or off the shelf?
Eddy, they are selffmade B&G's with visaton AL200, powered by a marchand xm9 deluxe active crossover, with for the high my aleph 5 unbalanced and for the low my modified audioanalyse B90. In the future I wil make it all balanced, the connections are allready there. I did not connect the balanced, only the unbalanced. Michael it,s indeed an unbalanced attenuator, also for the future I will try two mono attenuators. I put the in- and output minus to star ground. Grtz Teake
" ... In the future I wil make it all balanced, the connections are already there. I did not connect the balanced, only the unbalanced. ..."
Me too. Unbalanced and balanced source devices (DVD-A players, mixers, etc.) into multi-input, multi-channel pre-amp, then balanced out to the amp(s) ... = cleaner and more dynamic range of line level signals. (It is done in professional recording studios this way.)
Me too. Unbalanced and balanced source devices (DVD-A players, mixers, etc.) into multi-input, multi-channel pre-amp, then balanced out to the amp(s) ... = cleaner and more dynamic range of line level signals. (It is done in professional recording studios this way.)
Hi Zei!
No, no heatsinks, and I don't know how hot they get. I felt they get hot. But because they are not lyin on the board, and there is enough space to get the heat away, I think its not that big issuy. So I think I can do it this way, without damaging the mosfets, don"t you think? And besides the amp is still running for 3 days now. Grzt Teake
No, no heatsinks, and I don't know how hot they get. I felt they get hot. But because they are not lyin on the board, and there is enough space to get the heat away, I think its not that big issuy. So I think I can do it this way, without damaging the mosfets, don"t you think? And besides the amp is still running for 3 days now. Grzt Teake
He KMJ. The big brown ones are 4700uf's 80V from nippon, and the 10uf's I told before, the 47uf's are 30uf audyn cap plus I had allready, over from a speaker project. The small blue ones are ERO 1837's for bypassing the audyn caps. It's something from the diy speaker- and tube world where they use them a lot. I think tey are pre to the sound, fabulous. teake
intense-tavda
Ok, it was the smaller ones that confused me but bypassing big and probably expensive plasticcaps, that's a new one.
Ok, it was the smaller ones that confused me but bypassing big and probably expensive plasticcaps, that's a new one.
Well KMJ try it, I think you will be surprised. It,s not that big difference but you can hear it, it's more open and sparkling, getting more details, staing smooth. It's just that little bit more for a few cents. Teake
intense-tavda, Do all the Fet,s get equaly Hot ?
I,m just curious becouse mine,s are getting veeery hot.
Anyone else has this problem.?
/Z
I,m just curious becouse mine,s are getting veeery hot.
Anyone else has this problem.?
/Z
My 1.7's were powered this weekend. The 9610's are getting hotter than the 610's.
9610 get around 70 C and the 610's around 50 C.
This makes the circuit quite sensitive to inballance in a channel as function of airflow in the case.
I'm going to use a small heatsing to get the temp down to about 45 C and equalize the induvidual fets in temp.
@ 60V my 1.7 draws 77mA, so total dissipation of the fets is ~5W
per channel.
9610 get around 70 C and the 610's around 50 C.
This makes the circuit quite sensitive to inballance in a channel as function of airflow in the case.
I'm going to use a small heatsing to get the temp down to about 45 C and equalize the induvidual fets in temp.
@ 60V my 1.7 draws 77mA, so total dissipation of the fets is ~5W
per channel.
Hi There!
I will measure them too! How hot may they get? It,s still working, but for how long? And can I touch them without heatsink? I'll give it a try. You'll hear from me. grtz Teake.
I will measure them too! How hot may they get? It,s still working, but for how long? And can I touch them without heatsink? I'll give it a try. You'll hear from me. grtz Teake.
He guys!
What's to hot?
I read somewhere they can dissipate something about 150 C before they blow. grtz teake
What's to hot?
I read somewhere they can dissipate something about 150 C before they blow. grtz teake
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