I'm planning to clone a commercial preamplifier; Nakamichi 410. Since I'm new to electronics, I'm wondering that if the equipment needs +10V and -10V for operation, can I substitute the power supply section shown on attached by a switching or any +/-10VDC supply circuits? In brief, can I eliminate the attached circuit by substituting a ready-made power supply unit?
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It appears to be a tracking supply with positive being the reference. If the +10 goes up or down, the -10 will do
the same. It looks to deliver about 200 mA so it isn't a large amount (.2V across 1 Ohm R710). The reference
is a simple Zener diode so the accuracy isn't too fussy either. Pretty much whatever you do should be fine.
Switchers CAN be quiet but are not always. You can start out with a +/- 15 V switcher and use linear regulators
to clean it up but its such a low power supply a nice toroidal transformer, bridge and linear regulators would be fine.
Don't even bother with a switcher as it's only a 5 Watt load.
G²
the same. It looks to deliver about 200 mA so it isn't a large amount (.2V across 1 Ohm R710). The reference
is a simple Zener diode so the accuracy isn't too fussy either. Pretty much whatever you do should be fine.
Switchers CAN be quiet but are not always. You can start out with a +/- 15 V switcher and use linear regulators
to clean it up but its such a low power supply a nice toroidal transformer, bridge and linear regulators would be fine.
Don't even bother with a switcher as it's only a 5 Watt load.
G²
