[TLO74 ??? Dynamic Mic./Cond.Mic. amplifier.]

I like PreMic Transistor.

Pre MIC 3 Transister ( C945 ) mono
http://www.elecfree.com/electronic/pre-mic-3-transister-c945-mono-2/


Pre MIC - 3 Transister (C945) mono
http://www.elecfree.com/electronic/pre-mic-3-transister-c945-mono/


Pre MIC 2 Transister mono
http://www.elecfree.com/electronic/pre-mic-2-transister-mono/

[12 Volt to 220 Volt Inverter 500W]

:) Here is Circuit 12 Volt to 220 Volt Inverter 500W.
http://circuit-electronic.blogspot.com/2007/04/12-volt-to-220-volt-inverter-500w.html

use Transister only. (No IC)

[12 V DC to a 220V AC Inverter AMplfier Design]

idea small inverter.
http://circuit-electronic.blogspot.com/2007/02/inverter-12v-to-220v-100w.html
:)

[make a PCB by DryFilm.]

Easy to make PCB by Dry Film.
Negative Dryfilm Photo Resist Instruction for PCB prototyping.
http://eanic.blogspot.com/2007/01/negative-dryfilm-photo-resist.html

Good luck :)