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09-15-2019, 01:36 PM
Hi NGW
The actual supply fix is to replace the shunt regulated aux supply with voltage regulators. So, remove R85,86 and CR22,23 and replace them with 7815 and 7915. Bolt these to the chassis but insulate their backs and mounting bolts OR find fully epoxy encapsulated versions and bolt them directly.
The switching should work at +/-15V instead of +/-16V, but if you are concerned, add a diode in series with the adjust pin of each regulator.
As far as whether the 4560s will handle the current for the extra relay is unknown without knowing the complete part number off the chip. A search at Digikey shows 4560 opamps with maximum output currents of 25,30,50mA.
For the PS:
Power Scale kit ordering should be done via email or the London Power store.
The actual supply fix is to replace the shunt regulated aux supply with voltage regulators. So, remove R85,86 and CR22,23 and replace them with 7815 and 7915. Bolt these to the chassis but insulate their backs and mounting bolts OR find fully epoxy encapsulated versions and bolt them directly.
The switching should work at +/-15V instead of +/-16V, but if you are concerned, add a diode in series with the adjust pin of each regulator.
As far as whether the 4560s will handle the current for the extra relay is unknown without knowing the complete part number off the chip. A search at Digikey shows 4560 opamps with maximum output currents of 25,30,50mA.
For the PS:
Power Scale kit ordering should be done via email or the London Power store.
