[asilker]

I'm interested in investigating op amps by assembling a simple rca in rca out preamp to go between DAC and power amp. Here's a link to the kit I'm looking at: http://www.ebay.com/itm/131151570002 (one of the P7 kits)
 
Also looking at a number of attainable op amps like the AD 8066.
 
So my question is, what rating power adapter should I use? It looks like I'd be ok between 12-18v, but what amp rating should I look for?
 
thanks for any/all help. the op amp thread is HUGE so I'm hoping this isn't too tough a question for all you head-fi'ers.

 

[asilker]

I ordered a 15v laptop power supply. I'll give it a shot.

Comments still appreciated

 

[MisterX]

http://www.mcmelectronics.com/product/287-1010
 
Would be a better choice then laptop PSU but then we're getting way beyond reasonable especially when paired with that POS pre-amp kit.

 

[asilker]

Thanks for the suggestion. I think if I get a little farther into this, I'll start sinking more money into that sort of hardware

Also "pos preamp" lol. You don't think it could sound alright?

 

[asilker]

Bump. Opinions on a simple op amp preamp circuit? Audiokarma has a prett huge simple circuit thread...

 

[MisterX]

What's your skillz level?
 
http://www.head-fi.org/t/110757/simple-opa627-buf634-pre-amp
 
Would be pretty easy to build that circuit on perfboard.

 

[asilker]

Yeah that looks pretty similar. That's about what I've seen on audiokarma. And I actually found the fella who designed the kit that I linked earlier, he's on the DIYaudio forum

 

[asilker]

I'm a bit new to this, so I'm not gonna beat myself up too bad. But I just realized that the P7 board has a DC conversion circuit in it, so it's compatible with 12 0 12 AC, and not with the DC adapter I linked.
 
So I do need an AC transformer, and I suppose I need to figure out the amp rating I need? I'm assuming it can't be much

 

[MisterX]

Yeah, not much.
Even 100mA would be overkill, the problem is most transformers with current ratings that low are PCB mount (do not have mounting tabs).