Why Not ?

jurb6006 · 2013-10-07T12:30:14+00:00

At there is a screenshot of a circuit that is a bit screwed up because I don't know how to quite use LTSpice yet. The letters are in the way, but really it is still readable. It is a basic voltage tripler I designed years ago to feed an audio power a mp. I get this everybody uses transformers everybody uses transformers but why not this ? You know when a capacitor is a filter is still charges and disch arges just the same, the only fdifference here is like with a coupling cap, it is floating. Is there really a material difference ? If not, this should work. There is no regulation at all, and none needed. It is simple brute force. It puts ou t triple what is applied. At the bottom it is fed the usual 12 volts from t he battery. Then 24 volts is developed. (actually in the original design, i f the input voltage went above about 16 volts the drive to the outputs woul d switch to in phase and it would only double the voltage) The four capacitors are key to the voltage multiplication. I have considere d making them easily replacable if this circuit is used. Actually I have bu ilt it partly, using good CGS caps of like 15,000 uF and 1N6095 diodes. I i ntended to use I think 2N5883 and 5885 transitors, low voltage units with a lot of current capacity. Everything to minimize voltage loss. In an audio a mp, every volt is important because of the watts you lose. The amp I had oin mind for this was BTL runniing off the single ended suppl y, should have been maybe fifty watts into eight ohms but really, if those are really good capacitors it would have no problems with lower impedances. Also, with 18 volts on the speaker leads I came up with a pretty dandy amp protection circuit usiing an SCR and some hefty rectifiers to clamp it all down. In "short", if you connected a speaker wire to the car battery it wo uld burn the wire off and not be damaged. The protection would be reset sim ply by turning the power switch to off, from either on or auto. For the hell of...