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

    Yes, will do. Though screws were all I had at the time. I didn't even think it was going to work. I'm a bit more conservative and neater now.
  4. M

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

    Well some time has past and I know I'm bumping an old thread, sorry if the moderators are against reviving old threads. And the times have been slow to learn. I have gotten a new few books on electronics. Learned a little more but not much. My confidence level has raised. I'm not as timid to...
  5. M

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

    Well i put in the preamp so i could boost the signal of the guitar. Well this was a kit. Im lookinh at schematics and trying put a plan out in paper how it would fit in a board but for some reason my mind is having a hard time converting schematics to a physical circiut. Any good web sites that...
  6. M

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

    Here is a video, I wasnt trying to make a great sounding amp I was just starting to learn electronics.
  7. M

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

    I built the amp it was easy from set up to clean up it took about 4 hours. I thought that the preamp stage would give more but I'm not sure yet as the speaker I was using Im sure was not the ideal speaker, it was part of a stereo system we used to have. any how here are some pics. The...
  8. M

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

    Yeah i know what yoy mean about safety. I was poking around in an amp i had but i was using drum sticks and wearing leather work gloves. It must have been a site. Im still worried that s dont have a wire in my adapter that connects to ground. Any one know if this is a bad thing? I read alot that...
  9. M

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

    Thanks every one. This by no means is going to be a tube amp. Maybe one day i will make one. Right now im just taking baby steps. I feel a little bit more comfortable working with this ac adapter until i read that last post were it said 2000mA can start cardio problems and death it likely...
  10. 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.
  11. 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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