I am going to give a prize (un-named) to the most interesting
post on this thread between now and when the thread hits
300,000 hits. 😎
post on this thread between now and when the thread hits
300,000 hits. 😎
Nelson Pass said:
That will probably be tonight then (European time).
Let's try: I plan to make a WIKI for the AlephX.
Something like a compressed AlephX thread. Only the most essential stuff will be in it as a reference.
Let's see if I can find the time...
Won't be before the 300.000 hits
/Hugo 🙂
I am wondering where the ca. 350 other Aleph-X amplifiers are. I have seen so far a couple of finished ampflifiers. And the ones from Jarek, Netlist and Peter aren't builth with those pcbs. I am still fine tuning mine (a small off-set on 1 channel) but where are the other 750 Aleph-X channels 🙂.
There are only a handfull of people posting in this thread, and the pioneers have lost interest?
There are only a handfull of people posting in this thread, and the pioneers have lost interest?
Great idea, as time have shown us so many versions; alpha & beta, industrial, high power, with or without (Gray or HH)....
For my own part, will make another Aleph-X(?) when some figures are carved in (soft) rock... or some updated hi-power-design, "half power class A biased"...
Arne K
Indeed where are all those boards and there builders?Taco said:
We definitely need something new to add to the AlephX.
I keep thinking about cascoding, if only I knew how to implement it.
I made a vague attempt a few weeks (and a lot of posts) ago, but couldn’t complete more.
/Hugo – not the best designer 😉
I instead would want to know how many persons hold the transformers sufficiently far from the amplification boards. For me this is one essential thing and is also one of the reasons for which the construction of the aleph x will demand for me still much time, and above all one of the joys of the DIY.
😎
😎
stefanobilliani said:
In my case the transformer is pretty close to the boards, but the amplifier is dead silence. (4x 47.000 a channel and only 4,5A bias).
from little I have given one definitive garment to mine zenv4 with two box, putting the transformers close to the circuits. After approximately a week I have had to redone all , just becouse the closeness of the toroidals created a blowin up in the bottoms that does not appeal to me at all.
Hey a price winning competition - here is my attempt!
First of all I would say that if you do not find a suitable candidate for the prize - I suggest that Grey gets it - he is, after all, the one starting this thread.
I have been playing around with changing the aleph-x that I am currently building (20V rails 4,4A bias - one channel working), to a version that also includes a linkwitz transform. This transform allows for the change of a loudspeakers Q and fc (in this attached file from 59 Hz and Qt of 0.42 to 35 Hz and Qt of 0.35 - see www.linkwitzlab.com).
I still need to change the gain of the amplifier, but sofar it seems to work. The beaty of the linkwitz transform is that you can "shape" the lower roll off of a closed box system (second order slopes) to a desired one. I find this rather interesting and will pursue this topic further when I eventually build a pair of DIY speakers.
Best regards
Hans Bjergegaard
Denmark
First of all I would say that if you do not find a suitable candidate for the prize - I suggest that Grey gets it - he is, after all, the one starting this thread.
I have been playing around with changing the aleph-x that I am currently building (20V rails 4,4A bias - one channel working), to a version that also includes a linkwitz transform. This transform allows for the change of a loudspeakers Q and fc (in this attached file from 59 Hz and Qt of 0.42 to 35 Hz and Qt of 0.35 - see www.linkwitzlab.com).
I still need to change the gain of the amplifier, but sofar it seems to work. The beaty of the linkwitz transform is that you can "shape" the lower roll off of a closed box system (second order slopes) to a desired one. I find this rather interesting and will pursue this topic further when I eventually build a pair of DIY speakers.
Best regards
Hans Bjergegaard
Denmark
Also , I use ALL my cables of a fixed lenght , 125cm , or multiples:
2.5 meters etc.
Pratically it is my experience that a cable of 70cm sounds worse than a cable of 125 cm. It seems to be a matter of magnetic diturbs.
😎
2.5 meters etc.
Pratically it is my experience that a cable of 70cm sounds worse than a cable of 125 cm. It seems to be a matter of magnetic diturbs.
😎
stefanobilliani said:
Do you have the filtercap's still in the amplifiercase? Or did you split the capacity?
Netlist said:
I will encorage you to distill the unfo in this thread -- only one of many that would bnefit from this treatment.
dave
Although I like your Linkwitz attempt very much, I agree that Grey deserves the prize more then anyone else.Hans B said:
But after all, Nelson offered the prize.
/Hugo