sorry, no blue leds

grataku · 21st February 2003, 04:04 AM

here is my AX prototype

salud!

grataku · 21st February 2003, 04:06 AM

2

grataku · 21st February 2003, 04:08 AM

3

BrianGT · 21st February 2003, 04:09 AM

Interesting. Can you give a good closeup of the boards, as I am interested in the components that you chose to use.

Also, what power supply voltages and biasing did you use? What power output do you expect from it?

Looks good. What is the yellow/green stuff?

--
Brian

grataku · 21st February 2003, 04:09 AM

4

grataku · 21st February 2003, 04:11 AM

6

grataku · 21st February 2003, 04:30 AM

Power output? No idea.
Like Dexter says 'there is much to be doing'. The input resistors need to be changed they are 10K right now I want to go with 37K for starters. The highs don't have enough 'bite' with 10k. Mid and bass are amazing. Same behavior I observed on the bosoz. At this point I am convinced one has to be able to measure the different frequency response, it's just too dramatic an effect.

For source res. I am using 2 panasonic .47 3 w in parallel on one board and some other metal film that chad sent me on the other. Mills will take over those as soon as I get them.
I posted a pic of the board earlier on the aleph-x thread. The 0.33 10w on the pi filter need to be substituted by something better, get up to 150 C and they de-gas(stink), I didn't know ceramic had that much volatile binding agent. I don't what I will end up using, maybe thermistors, I don't like the idea of having to solder many components on the cu plates.
As one can see no coupling caps here, XLR driven from the BOSOZ.
the green stuff is some kind of g10

fcel · 21st February 2003, 04:42 AM

Grataku,

Finally you got it done. Looks really good! Now are you going to publish:
1. the part numbers (& vendors name) of all the components that you have installed on the board?
2. The capacitor values?
3. transformer size (& sec voltages)?

I know all this has been discussed to death on the other threads but .... in another word, I would like to built a prototype too that is exactly like yours ... except for the heatsink/chassis.

By the way, is it a pain in the neck to adjust the three VR? And most importantly, how does it sound?

grataku · 21st February 2003, 04:52 AM

Chad posted some kind of BOM already...I think, plus this dead horse has been beaten to dust, I just threw on stuff I had laying around. There are still things to be modified. At the moment I am tired of soldering.

Coulomb · 21st February 2003, 05:07 AM

Where did you buy the Heatsink material from, I have the exact some stuff, about 8 feet of it actually. Got it all from ebay, I machined it to look like one heatsink.

Anthony

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21st February 2003, 04:09 AM	#4
BrianGT diyAudio Member Join Date: Jan 2002 Location: near Atlanta, GA	Interesting. Can you give a good closeup of the boards, as I am interested in the components that you chose to use. Also, what power supply voltages and biasing did you use? What power output do you expect from it? Looks good. What is the yellow/green stuff? -- Brian

21st February 2003, 04:30 AM	#7
grataku diyAudio Member Join Date: Dec 2000 Location: -	Power output? No idea. Like Dexter says 'there is much to be doing'. The input resistors need to be changed they are 10K right now I want to go with 37K for starters. The highs don't have enough 'bite' with 10k. Mid and bass are amazing. Same behavior I observed on the bosoz. At this point I am convinced one has to be able to measure the different frequency response, it's just too dramatic an effect. For source res. I am using 2 panasonic .47 3 w in parallel on one board and some other metal film that chad sent me on the other. Mills will take over those as soon as I get them. I posted a pic of the board earlier on the aleph-x thread. The 0.33 10w on the pi filter need to be substituted by something better, get up to 150 C and they de-gas(stink), I didn't know ceramic had that much volatile binding agent. I don't what I will end up using, maybe thermistors, I don't like the idea of having to solder many components on the cu plates. As one can see no coupling caps here, XLR driven from the BOSOZ. the green stuff is some kind of g10

21st February 2003, 04:42 AM	#8
fcel diyAudio Member Join Date: Sep 2001 Location: LA County	Grataku, Finally you got it done. Looks really good! Now are you going to publish: 1. the part numbers (& vendors name) of all the components that you have installed on the board? 2. The capacitor values? 3. transformer size (& sec voltages)? I know all this has been discussed to death on the other threads but .... in another word, I would like to built a prototype too that is exactly like yours ... except for the heatsink/chassis. By the way, is it a pain in the neck to adjust the three VR? And most importantly, how does it sound?

21st February 2003, 04:52 AM	#9
grataku diyAudio Member Join Date: Dec 2000 Location: -	Chad posted some kind of BOM already...I think, plus this dead horse has been beaten to dust, I just threw on stuff I had laying around. There are still things to be modified. At the moment I am tired of soldering.

21st February 2003, 05:07 AM	#10
Coulomb diyAudio Member Join Date: Jul 2002 Location: Ancaster, Ontario	Where did you buy the Heatsink material from, I have the exact some stuff, about 8 feet of it actually. Got it all from ebay, I machined it to look like one heatsink. Anthony

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