I have one channel ready to be assembled and plugged into the electricity. Any advice? The toroid is 1KVA at 31-0-31-0. Caps filtration at 22,000 x 6. Should I put inductors on the rail or resistor will do (which value of the resistor should I use?)? I hope I won't see any smoke when I turned it on. Thanks.
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Hi,
nice monster, it looks like the mine you can see it on this forum.
For the power rails I use 0,2 ohm not inductive resistances on each rail after the first capacitors, that makes a cut off filter for frequency over 100hz, you will loose 1,6 volts on the supply if you are using one transfomer for the both channel on a Aleph30 (I don't know wich Aleph you are building).
Another idea is to separate the ground rails until the end like this
+-------------------- + out
gnd+---------------------
] gnd out, here you connect the wire
gnd- ---------------------
- --------------------- - out
it is better to do it this way, so you have a good gnd reference without fluctuations
And the last, separate the gnd wire for the pcb board, one wire for the high current and an another one for the entry level, on my PCB I have separated the gnd for these two level and they are only connected on the common gnd out point.
Good continuation.
Regards
Yonnat.
I thought it was plastics......
Mr. McGuire: I just want to say one word to you - just one word.
Ben: Yes sir.
Mr. McGuire: Are you listening?
Ben: Yes I am.
Mr. McGuire: 'Plastics.'
Ben: Exactly how do you mean?
Mr. McGuire: There's a great future in plastics. Think about it. Will you think about it?
Ben: Yes I will.
Mr. McGuire: Shh! Enough said. That's a deal.
Sorry Nelson. As a fellow film fan you know I couldn't resist!
Mr. McGuire: I just want to say one word to you - just one word.
Ben: Yes sir.
Mr. McGuire: Are you listening?
Ben: Yes I am.
Mr. McGuire: 'Plastics.'
Ben: Exactly how do you mean?
Mr. McGuire: There's a great future in plastics. Think about it. Will you think about it?
Ben: Yes I will.
Mr. McGuire: Shh! Enough said. That's a deal.
Sorry Nelson. As a fellow film fan you know I couldn't resist!
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An alternative to variac: thermistors. Carefully placed between the caps. Like Nelson did in the XA200...
Also, do yourself a favor, don't break any taps. On the 23rd hole for the 23rd output mosfet you'll feel like punching your way through, resist it or you'll be
Also, do yourself a favor, don't break any taps. On the 23rd hole for the 23rd output mosfet you'll feel like punching your way through, resist it or you'll be
The day of REVELATION
Finally, I connect everything and turn it on. Only one channel that is working now, still waiting for more additional heatsink for the other channel. My 1st impression of the amp was it sure really hot. I do not have the temp mesarument device yet, perhaps the coming monday. Sound wise, this amp open up my eyes (ears actually). Sound coming out from my BW 602 is much more defined and set loose with out anything in between. Could not wait for the other channel to be completed.
Finally, I connect everything and turn it on. Only one channel that is working now, still waiting for more additional heatsink for the other channel. My 1st impression of the amp was it sure really hot. I do not have the temp mesarument device yet, perhaps the coming monday. Sound wise, this amp open up my eyes (ears actually). Sound coming out from my BW 602 is much more defined and set loose with out anything in between. Could not wait for the other channel to be completed.
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Will be improved
Cosmetic wise, it will be improved later on. I just could not resist to wait to turn it on any longer.
Cosmetic wise, it will be improved later on. I just could not resist to wait to turn it on any longer.
Great job,
you're using 1 channel but you have on both sides of the case heatsinks and 2 driver boards. How do you manage that?
you're using 1 channel but you have on both sides of the case heatsinks and 2 driver boards. How do you manage that?
be frankly, I worry about the driver PCB which look like "hanging upon the transistors. Is it O.K. after moving up and down this "monster" to anywhere yor want?
😕 😕 😕
😕 😕 😕
So sorry for the late replies
NETLIST, Here is the pic of front and back. BTW, did you anodised your own heatsink on your Alpeh X? Looks very well finished. How doesit sound compard to the Aleph 2?
TACO, Each board got their own heatsink. It is Aleph 2 which uses 3 pairs of the mosfet for each driver board.
PELEUS, Frankly I was concern about the arrangement, but when I tried pushing the board, it sits quite tight.
NETLIST, Here is the pic of front and back. BTW, did you anodised your own heatsink on your Alpeh X? Looks very well finished. How doesit sound compard to the Aleph 2?
TACO, Each board got their own heatsink. It is Aleph 2 which uses 3 pairs of the mosfet for each driver board.
PELEUS, Frankly I was concern about the arrangement, but when I tried pushing the board, it sits quite tight.
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Wow, what a front; looks more industrial than mine 😀
And place for six blue Led's.
I can't compare the AlephX with the Aleph2, simply because I don't have an Aleph2 🙂
The heatsinks came in black anodised. I wasn't pleased at all when the first four came in so I send them back. Second delivery wasn't much better, but I could live with them. I won’t name the supplier, because I was pleased with their service. The problem was in the factory I guess.
In time you will read some sound interpretations of the AlephX in the "Industrial AlephX" thread.
/Hugo
And place for six blue Led's.
I can't compare the AlephX with the Aleph2, simply because I don't have an Aleph2 🙂
The heatsinks came in black anodised. I wasn't pleased at all when the first four came in so I send them back. Second delivery wasn't much better, but I could live with them. I won’t name the supplier, because I was pleased with their service. The problem was in the factory I guess.
In time you will read some sound interpretations of the AlephX in the "Industrial AlephX" thread.
/Hugo
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