Project update Aleph5

rwagter · 28th January 2003, 02:26 AM

It seems to me that were going to be flooded with nice Aleph 2,5,x project in the very near futere.

Just some pictures of my ongoing project. I will probably wire everything up this weekend.

moe29 · 28th January 2003, 04:01 AM

Wow! looks great.

Scribble · 28th January 2003, 12:15 PM

Another good looking upcoming project ive seen tonight!

I love the p2p wireing you've done on the outputs, inspired me

Keep up the good work and show us more pic's later!

Scribble

Mad_K · 28th January 2003, 09:31 PM

Very nice, indeed!

swede · 28th January 2003, 09:48 PM

And in the background (on his monitor) you can see that he is faithful... 100% http://www.diyaudio.com!

//magnus

MikeW · 28th January 2003, 11:42 PM

It looks very nice. How big is the transformer? What kind of output Mosfets? How high are you going to crank the bias?

rwagter · 29th January 2003, 12:00 AM

Mike,

there are 2 tranny's 2x28V 500VA (amplimo/plitron); 12*10.000uF p/ch ;6xIRFP240 p/ch

All compartimets will be separatebly shielded with mu-metal (which I recieved today from planet10). There will also be a layer of mu-metal between the transformers to reduce parasitic working in the PSU

Connectors will be WBT's.

I have no idea what the final bias will be but have already installed a nice small pot for experimenting. Because the heatsinks are of a moderate size it will be near standard value

rwagter · 16th February 2003, 07:50 PM

IT WORKS

One channel is up and running with only 9 mV dc-offset. That's not to bad at all

. I just powerded it up watch looked out for smoke which wasn't evidently there and just connected an old speaker.

Hopefully channel number two will go as smoothle as this one.

There is still a little bit of hum but the ground is still directly coupled and that will be thru a thermistor as soon as the other channel is up and running.

Ralph

Andypairo · 17th February 2003, 08:18 AM

Where did you get these insulators?
(And How much do they cost?..)

Here I can hardly find micas but using thermal grease it's so messy....

Cheers

Andrea

rwagter · 17th February 2003, 12:42 PM

That are berquist insulators I bought them with all other components at digikey

28th January 2003, 02:26 AM	#1
rwagter diyAudio Member Join Date: Jul 2002 Location: Netherlands	Project update Aleph5 It seems to me that were going to be flooded with nice Aleph 2,5,x project in the very near futere. Just some pictures of my ongoing project. I will probably wire everything up this weekend.

28th January 2003, 09:31 PM	#4
Mad_K diyAudio Member Join Date: Sep 2002 Location: Norway	Very nice, indeed! __________________ Mads K

28th January 2003, 09:48 PM	#5
swede diyAudio Member Join Date: Sep 2001 Location: Geneva, Switzerland	www... And in the background (on his monitor) you can see that he is faithful... 100% http://www.diyaudio.com! //magnus

28th January 2003, 11:42 PM	#6
MikeW diyAudio Member Join Date: Sep 2002 Location: North of Boston	It looks very nice. How big is the transformer? What kind of output Mosfets? How high are you going to crank the bias? __________________ MikeW

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28th January 2003, 04:01 AM	#2
moe29 diyAudio Member Join Date: Dec 2002 Location: Florida	Wow! looks great.

28th January 2003, 12:15 PM	#3
Scribble diyAudio Member Join Date: Dec 2002 Location: Western Australia	Another good looking upcoming project ive seen tonight! I love the p2p wireing you've done on the outputs, inspired me Keep up the good work and show us more pic's later! Scribble

29th January 2003, 12:00 AM	#7
rwagter diyAudio Member Join Date: Jul 2002 Location: Netherlands	Mike, there are 2 tranny's 2x28V 500VA (amplimo/plitron); 12*10.000uF p/ch ;6xIRFP240 p/ch All compartimets will be separatebly shielded with mu-metal (which I recieved today from planet10). There will also be a layer of mu-metal between the transformers to reduce parasitic working in the PSU Connectors will be WBT's. I have no idea what the final bias will be but have already installed a nice small pot for experimenting. Because the heatsinks are of a moderate size it will be near standard value

16th February 2003, 07:50 PM	#8
rwagter diyAudio Member Join Date: Jul 2002 Location: Netherlands	IT WORKS One channel is up and running with only 9 mV dc-offset. That's not to bad at all . I just powerded it up watch looked out for smoke which wasn't evidently there and just connected an old speaker. Hopefully channel number two will go as smoothle as this one. There is still a little bit of hum but the ground is still directly coupled and that will be thru a thermistor as soon as the other channel is up and running. Ralph

17th February 2003, 08:18 AM	#9
Andypairo diyAudio Member Join Date: Sep 2002 Location: near Milano , Italy	Where did you get these insulators? (And How much do they cost?..) Here I can hardly find micas but using thermal grease it's so messy.... Cheers Andrea

17th February 2003, 12:42 PM	#10
rwagter diyAudio Member Join Date: Jul 2002 Location: Netherlands	That are berquist insulators I bought them with all other components at digikey

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