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Hotrodding the X-Fi: A Layman's Guide (No 56k) - Page 49

post #721 of 2194
what about changing the input op amp for running dvd player through computer?
post #722 of 2194
Quote:
Originally Posted by cotdt View Post
my advice is to get a hotter iron. they are only $2 each.
I paid 15 for mine and its 30W. Maybe a 60W? If I can find one...
post #723 of 2194
Thread Starter 
Quote:
Originally Posted by theBigD View Post
what about changing the input op amp for running dvd player through computer?
yes, i have mentioned that you can change the input opamp.
post #724 of 2194
will a 40w iron from radioshack be enough? looking at adjustable temp irons they seem a little spendy. this will be my first project, and dont want to spend alot.
post #725 of 2194
Thread Starter 
Quote:
Originally Posted by theBigD View Post
will a 40w iron from radioshack be enough? looking at adjustable temp irons they seem a little spendy. this will be my first project, and dont want to spend alot.
No, but you can try it. My 60W iron was only $2.
post #726 of 2194
I used a cheap 30W and it worked perfectly.
post #727 of 2194
Well... The Watts are secondary....

It's the temperature it's depending on.
If you try to solder around 250°C, nothing will happen. At 450°C, you won't only solder the oamps, you'll also solder the most of the pcb and/or the
conductive strips (dunno the real English word!?).

Try something around 300°C - 350°C at max. and everything will be fine. I use a so called "LÖTSTATION ST081" from www.conrad.de an everything worked fine.
post #728 of 2194
so radio shack says 40 watt pencil iron is around 600 deg. is this too hot?
post #729 of 2194
Quote:
Originally Posted by theBigD View Post
so radio shack says 40 watt pencil iron is around 600 deg. is this too hot?
Not if you work fast and know what youre doing. I would advise to get one with adjustable temperature if you can spare a few extra bucks.
post #730 of 2194
Quote:
Originally Posted by cotdt View Post
yes, i have mentioned that you can change the input opamp.
I noticed that... but I can't remember you saying if you could just use a 4562, or if the input op-amp is completely different to the 4556/8 and 4562...

is the 33078 totally different? I really tried to find out on the Ti datasheet (MC33078) and then I realised I didn't have a clue what I was looking for lol
post #731 of 2194
Quote:
Originally Posted by hardnrg View Post
I noticed that... but I can't remember you saying if you could just use a 4562, or if the input op-amp is completely different to the 4556/8 and 4562...

is the 33078 totally different? I really tried to find out on the Ti datasheet (MC33078) and then I realised I didn't have a clue what I was looking for lol
Yeah the 4562 should work in the line-in position aswell. I ordered a AD9631 sample for this position the other day after someone here recommended it, however looking at the pinout they dont seem compatible? 9631 seems to not be dual :|

http://www.onsemi.com/pub/Collateral/MC33078_PKG.GIF
http://www.analog.com/UploadedFiles/...D9631_9632.pdf
post #732 of 2194
Man I ordered 3 more opamps like 3 weeks ago and they still arent here... maybe ill have to order another 3. I need full surround. Oh and my soldering iron is 30W and like 400 or so temp. It was easy soldering and the opamp, my only problem is that stuck leg. There seems to be NO soldering around it, its just stuck in there.. and it wont come out. I havent gotten to drilling it yet, I really should get on that.
post #733 of 2194
Thread Starter 
Quote:
Originally Posted by hardnrg View Post
I noticed that... but I can't remember you saying if you could just use a 4562, or if the input op-amp is completely different to the 4556/8 and 4562...

is the 33078 totally different? I really tried to find out on the Ti datasheet (MC33078) and then I realised I didn't have a clue what I was looking for lol
i used LM4562.
post #734 of 2194
Quote:
Originally Posted by hardnrg View Post
I noticed that... but I can't remember you saying if you could just use a 4562, or if the input op-amp is completely different to the 4556/8 and 4562...

is the 33078 totally different? I really tried to find out on the Ti datasheet (MC33078) and then I realised I didn't have a clue what I was looking for lol
Since i mistakenly ordered a mono opamp sample (always double check recommendations ) i now ordered an AD8066 which seems a worthwhile try for the input opamp (aswell possibly as output opamp). Also ordered a few AD8599 which i'm gonna give a spin for the surround channels, since National is still charging quite a bit for 4562's and AD isnt, for me anyway, and they have some interesting opamps. AD8620 is an interesting one aswell but is a bit more costly and no free samples. Have a look around the sites of National and AD, they have a lot of opamps that in most cases will probably be compatible, id stick to fast opamps though, and ofcourse Dual, and 8pin SOIC. Browse the spec sheets for recommended applications.
post #735 of 2194
[QUOTE=phalanger;2961431]Also ordered a few AD8599 which i'm gonna give a spin for the surround channels, since National is still charging quite a bit for 4562's and AD isnt, for me anyway, and they have some interesting opamps. QUOTE]

I got my 4562's for free..
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