« Reply #15 on: December 28, 2006, 01:53:58 AM »
....But the second design you show is typical of most of these small preamps. I based my design on it as well. The first design is too simple, and will have higher distortion than the second.
Richard
Have you experimented with the different opamps in this circuit, Richard? The TL072, LM833 and NE5532 or any other?
Which one would you recommend for which reason?
I"d like to build one and run it with a single 9 Volt battery which excludes the LM833 since it is said to needs 2 batteries. Is the NE5532 best, would a TL062 also do?
Any other important observations that would help?
thank"s
For a cheap unit I recommend NE5532, or the Burr Brown Chips (OPA-2227/2228). I couln't hear much difference between these.
You might get better sound with some fancier chips, but start simple first.
Richard
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