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  1. M

    question about chip replacements.

    I have a few schematics that use a op/amp chip for the base of a preamp. Can I just match the pin outs to an 12ax7 tube and replace the chip? What would happen would it just not work? Or will I seriously mess things up?
  2. M

    getting some input on a hybrid low watt low powered guitar amp

    Okay so here's the deal. I have a velleman 7 watt amplifier That is put together but not getting any use It's based on tda2003 chip. This is working and I did have it paired with a velleman pre amp it was decent I could over drive the pre amp to get some gain and distortion. Well decent to me...
  3. M

    hello, im a noob but you gotta start somewhere

    Hi every one im new but i accidently post my intro in general discusions. Sorry.
  4. M

    Hello Im new this is my first post, I have lots a questions.

    Hello everyone, I'm new both to this website forum and the interesting world of electronics. to include circuit building and repairs etc. Just to introduce my self my name is Mike, I work as an information systems. I'm a musician as well which is the reason to come in here and pick every one's...
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