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Old 21st February 2003, 04:04 AM   #1
grataku is offline grataku  United States
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Default sorry, no blue leds

here is my AX prototype

salud!
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Old 21st February 2003, 04:06 AM   #2
grataku is offline grataku  United States
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Old 21st February 2003, 04:08 AM   #3
grataku is offline grataku  United States
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Old 21st February 2003, 04:09 AM   #4
BrianGT is offline BrianGT  United States
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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
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Old 21st February 2003, 04:09 AM   #5
grataku is offline grataku  United States
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Old 21st February 2003, 04:11 AM   #6
grataku is offline grataku  United States
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Old 21st February 2003, 04:30 AM   #7
grataku is offline grataku  United States
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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
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Old 21st February 2003, 04:42 AM   #8
fcel is offline fcel  United States
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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?
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Old 21st February 2003, 04:52 AM   #9
grataku is offline grataku  United States
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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.
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Old 21st February 2003, 05:07 AM   #10
Coulomb is offline Coulomb  England
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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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