thank ! i got another questions / eq tion i not sure right or wrong !! hope u guy help me solve !! im calculate the output transformer base on the voltage and output from the circuit zvr7T and im not sure is correct or not ............
From the circuit we know that 30v is the max audio voltage , since transformer waste power i decreace 10% on it . ~27v/1.414 = 19V rms . this circuit is design for 30w into 8 ohm then voltage =15.5v , turn ratio = 19/15.5 = 1.225 , primary Z = 8 * 1.225 = 9.8 . 9.8* 4 = 39.2 ohm !! so the transformer for this circuit will be ~ 40 ohm center tapped ? correct or not ?
From the circuit we know that 30v is the max audio voltage , since transformer waste power i decreace 10% on it . ~27v/1.414 = 19V rms . this circuit is design for 30w into 8 ohm then voltage =15.5v , turn ratio = 19/15.5 = 1.225 , primary Z = 8 * 1.225 = 9.8 . 9.8* 4 = 39.2 ohm !! so the transformer for this circuit will be ~ 40 ohm center tapped ? correct or not ?
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Well, the transformer says 8 ohms on the four primary windings,
and 80,000 ohms on the secondary which gives 50 to 1 if you
series all the primaries to 32 ohms.
The amp does 30 volts rms into these in series, which produces
50 X this voltage, which is 1500 V RMS. The loss in the
transformer is very slight at mid band, as electrostatic panels
don't load it until the top octave or so.
In your calculation, you are assuming a 30V peak, but remember
that this circuit can swing quite a bit more than rail voltage.
and 80,000 ohms on the secondary which gives 50 to 1 if you
series all the primaries to 32 ohms.
The amp does 30 volts rms into these in series, which produces
50 X this voltage, which is 1500 V RMS. The loss in the
transformer is very slight at mid band, as electrostatic panels
don't load it until the top octave or so.
In your calculation, you are assuming a 30V peak, but remember
that this circuit can swing quite a bit more than rail voltage.
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