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The PS10 requires a center-tapped voltage from your power transformer's secondary. Tell us your desired regulated output voltage and the secondary
voltage of your transformer and we will provide the correct components. You should allow for a voltage drop of approximately 25 volts across Q1
and a 10-20 volt drop across L1 depending upon the amount of current drawn from your amplifier circuit. If you are designing a power supply from
the ground up it is usually best to start at the output of the PS10 and work your way back to the power transformer. Below is an example.
Example:
You have an amplifier that requires a high voltage supply of 450V and has a current
draw of 100mA. Since we require a 25V drop across Q1 the junction of Q1 and L1 should then be 450V + 25V or 475Vdc.
Since the current draw of the amplifier is 100mA we will want to use the larger choke
for L1 (CH20). There will be a voltage drop across L1 due to its internal dc resistance. The dc resistance of CH20 is specified by the
manufacturer as 80 ohms so from Ohm's law, the voltage drop will be calculated as this resistance multiplied by the 100mA current draw or 80 x 0.10
which equals 8.0V. So we will add this 8V to our previously derived 475V for a total dc voltage requirement of 483Vdc.
The PS10 uses a full wave rectifier circuit so the required ac voltage from the power transformer will be 1.414 times the desired dc voltage. In
our case, that will be 1.414 x 483V which equals 683Vac. So a center-tapped transformer rated at 700V will work perfectly.
If you need help with your specific calculations please feel free to contact us for assistance.
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