SSL9k BOM

[Harpo]

I've now added parts for resistors: Used 250mW, metal film where I could, but had to pick some ceramic, 400mW and so a few places.

There is no such thing as 'TL 52' and it wouldn't be a bad idea to consult ohms law for some over-/underspecced parts ...
(FI 50K with 5W rating, 6K81 phantom-V feeding resistors with 0.25W rating, ...)

 

[G-Sun]

I've now added parts for resistors: Used 250mW, metal film where I could, but had to pick some ceramic, 400mW and so a few places.

There is no such thing as 'TL 52' and it wouldn't be a bad idea to consult ohms law for some over-/underspecced parts ...
(FI 50K with 5W rating, 6K81 phantom-V feeding resistors with 0.25W rating, ...)

Ok, thanks!
I see there's a few things I don't understand (but, that's not unexpected )
TL052: Corrected
Ok, so what do I do when I don't find exactly right ohm and watt?
What is a good choice for 50k? and
What power-rating should I have for the Rp1 and Rp2?

 

[s2udio]

I do belive someone (harpo) ...like re "last post" gave you this information !

???

 

[G-Sun]

I do belive someone (harpo) ...like re "last post" gave you this information !

Ok, sorry, I didn't get it.
Well, I found another post regardin Rp1 and Rp2 by Harpo, explaining them
http://www.groupdiy.com/index.php?topic=4731.msg431566#msg431566
But nothing about power rating.
Isn't Harpo above saying that 1/4W is wrong?

Ok, so I need to consult Ohm?
Well, its: I = V/R
Hm.. where do I get that power rating in, ok.
P = IV  >> I = P/V
P/V = V/R  >> P = V2/ R
So P = 48V2 / 6081Ohm = 0,379W , right?
So, double that for safety (isn't it so?)
Getting min power rating of 0,758W

Correct?

Changed part to
http://no.farnell.com/vishay-bc-components/mrs25000c6811fct00/resistor-mrs25-1-6k81/dp/9469818
6,81kOhm, +-0,1, 600mW (best I could find), good choice?

 

[G-Sun]

(FI 50K with 5W rating

Change to 49k9 250mW Metal Film
http://no.farnell.com/te-connectivity-holsworthy/h849k9bya/resistor-0-25w-0-1-49k9/dp/1751625
Should be inside spec. Right?

 

[G-Sun]

Changed 10k for non-US-store
9341110

 

[G-Sun]

Changed 10uF/25V to:
http://no.farnell.com/sanyo/25sc10m/capacitor-10uf-25v/dp/9188690
Sanyo (not to bad I hope)
Reason: Non-US-store, better match on lead spacing

 

[EmptyMusicBox1]

i will start to follow your BOM for make a 9k !

do you have some recommandation ?

thanks !

 

[G-Sun]

I'll repeat my mail here:

It's not my BOM, I've just formated it and and added some sources.

My recommendations:
- Tr5: I'd go for the 18V, so just +-18V needed
- Balancing board: The wholes are not big enough for molex (recommended), so you need a drill. But if the drill-size is to big, you'll mess up the holes..
- Use sockets for the IC's unless you are sure you'll not need them.

Good luck!

 

[G-Sun]

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