Multimeter Schematic

Help with DC-AC inverter?

Hey everyone, i’m having trouble constructing a DC-AC inverter, using the plans shown here: http://www.aaroncake.net/circuits/inverter.asp

I have put it together, but when I check with a multimeter, it’s only giving out about 7v DC from the other side, I have not connected the transformer yet.
Would anyone be able to help me with this problem, or provide an alternate schematic for a simple circuit like this? Thanks very much!
Thanks for the help everyone, I assumed the transistor equality problem would be overcome like Robert said, through differences in transistor manufacture?
What i’d like to know is how the transformer actually plays a part in this circuit… my assumation was that it just took the 12v ac current and stepped it up to 120v ac?
Theoretically couldnt i take out the 12v ac square wave if I wanted to?

As the other chap says, the transformer primary is part of the circuit and without it, it won’t work. Also FYI, the output of this will be more or less a square wave which may cause problems for some equipment.

Have you seen this page http://www.aaroncake.net/forum/topic.asp?TOPIC_ID=2996&CAT_ID=10&FORUM_ID=18&Forum_Title=Power+Supply&Topic_Title=12%2F120V+inverter+again
Several people think the caps are polarised the wrong way and I tend to agree. There are also problems getting it going. The basic problem is that if it is too symmetrical then both sides will just turn on a bit. It needs something to ensure that during start up one side saturates and the other stays off but I can’t think of an easy way to do that at these currents.

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