Hello all! Since I am a new member and this is my first post, allow me to give some background on myself before I dive into my "beginner questions". (Feel free to skip this paragraph if you don't care. ) I've been an acoustic player for well over 10 years (Taylors, mostly) and have only started playing electric guitar for about a year now. Right now I have a late-model (2008, I think) Gibson Melody Maker. This guitar has the single coil bridge pickup + 1 volume + 1 tone. Verrrry basic! I eventually got curious and took off the pick guard to look at the internals. That sparked the urge to learn as much as I can about guitar wiring and make some mods to my guitar. The Melody Maker seems like an excellent candidate for trying out different guitar mods (even moreso than a Strat, IMO) because everything is housed right under the pick guard, making it very easy to mount new pickups and pots, with plenty of room for wiring. I am also not concerned with this guitar's resell value as I plan to hang onto it no matter what. So having said all that, I've been researching wiring techniques, pickup types, pots, shielding, etc for months. I've been reading websites, forums, YouTube, etc. And now I find myself pretty knowledgeable in some areas but lacking the foundational basics. And I'm not sure how/where to get that basic engineering/electrical knowledge.
These are the kinds of questions that I have rattling around in my head: ( )
(1) When you plug a passive pickup into a guitar amp, does the amplifier send power into the guitar's circuit? Or is it just a one-way signal flow from the guitar to the amp? (2) What kind of power is flowing inside a guitar circuit between the pickups, pots and output jack? There must be some level of low-wattage electricity. Is the electricity generated by the magnetics in the pickup? Is there still power flowing in the guitar's circuit even when the guitar is not plugged in (assuming it's a complete circuit)? (3) What is a "line-level" signal? (4) Is there a scientific specification for line-level sound? (5) Is the signal coming out of the guitar before amplification considered line-level? (6) How do you know when you're dealing with a line-level signal or an amplified signal? If in doubt, can you use a voltmeter or something? (7) What does an amplifier actually do to the signal to make it louder? (I have a vague understanding of amps, volts, wattage, ohms.) Does it simply increase the wattage, leaving everything else the same? (8) Why is it that you never hear about amps or volts when dealing with guitars or amplifiers? You only hear about X wattage @ X ohms. Does an electrical audio signal not use amps/volts? (9) Is an electric audio signal AC or DC? (10) Is an audio signal considered analog any time that there is a real, electrical current flowing? (For example, the output directly from the guitar.) (11) When I look at the internals of an amp, the wiring consists of little, thin wires and circuit boards up until the actual amplification. After amplification, I begin to see thick, beefier wires. What is the difference between pre-amp and post-amp wiring? Just a larger gauge/thickness of wire? (12) Why is a larger wire necessary after amplification? (13) How do you know what type of wire you need? Is there only pre-amp and post-amp wire types? (14) Why is only copper wire used in guitars/amps? (15) What happens if you accidentally touch the live wires inside of a guitar while it is plugged into an amp? Will it zap you? (16) If you temporarily short the circuit inside a guitar, can you ruin some of the electronics? (17) What about post-amplification wires? I have an amp that outputs 120 watts @ 8 ohms. Is that enough to zap you if you accidentally touch the live wire? (18) Can you ruin the amp if you temporarily short circuit the wires?I've listed all of these questions not necessarily expecting an answer on each one, but rather to give examples of the kinds of questions that I have. I would like to discuss these questions in this thread if anyone is willing. But I'd also be happy to have you suggest ways that I can learn these audio basics on my own (books, websites) . If you know these engineering-type questions, how did you originally learn this stuff?
Please help a guy out who is new at this stuff! It will be much-appreciated! I plan to continue participating in these forums on a regular basis. I also plan to post pictures/descriptions on my website of the mods that I work on. I will keep those links in my signature so anyone can check out my latest projects.
Thanks!