Niode wrote:A cheap one is fine for big stuff like soldering wires in guitars and guitar amps/pedals but for pcb you need one with variable heat and lots of control, preferably with interchangeable tips.
I'd have to disagree with you. The reason I learned how to solder in the first place is because of guitars, so I'm here to tell ya, a cheap soldering iron is NEVER good. Also, guitar amps and effect pedals
are PCBs, save for a pot, jack or switch. Might just be my ignorance, but I have done various work on PCBs and I never used an iron with variable heat or different tips, and while I'm not a professional soldering technician or anything, I don't think is necessary.
You
could use a heatsink to prevent damage to components, but I've never done this either. You attach it before a capacitor or chip so the heat from the iron doesn't get through to it, and possible damage it. But honestly, if you're holding the iron onto a contact point long enough for it to damage a component, you're doing something wrong.
I own 4 different soldering irons and my favorite one I paid around $30-45, some where around there. The worst one that I have, was something like $15, and is impossible to use. So I'd suggest spending a decent amount on it. It's not worth the headache.
The best thing to own along with the iron is a desoldering device, and it should be $5 or less. It's really essential when you're changing parts. If you're trying to swap a resistor or capacitor on a PCB it's a lot easier if you remove some or most of the solder first.
I have flux, and every one swears you have to use it, but I actually never had. You really don't need to if you're working on brand new parts, and most of the time that's what I'm doing. When you have some old guitar in front of you and the pots are all gunked up, its well worth replacing them over trying to salvage them.
Flak, if you can't find a good video any where let me know and I'll make one for ya. I've actually been wanting to for some years now, but never got around to it. Soldering is really easy, if you have a steady hand. If you can't find anything good enough on the 'net, let me know. I'll get some videos and type up a proper guide for ya.
If you don't read any thing else in this post,
READ THIS: Like others have said, the first time you attempt to solder something, you might wanna try it out on something of little value. I'm not sure what you're looking to solder, but... If you have some old PCB from anything (broken game console, sensor from a security light, remote control, etc) you could practice on that. Remove a resistor or capacitor and then put it back in place. Hell, pick up a pot from Radio Shack for a few dollars and solder a wire or two to it, maybe a capacitor or something. Just so you can get a feel for it before you go to tackle a project on something you care about.