Hi,
Like the title says I need to power up an early 90's amplifier power supply that has been sitting for many years. At least 5 and probably closer to 10 since it has seen line voltage. Just the bare power supply, the transistor board has been removed.
It is basically a big Toroidal transformer with rectifier and (4) large 10,000 uf / 90 volt capacitors. Output is +/- 80 volts.
I have a Variac transformer on order. Do I just start from say <10 volts AC and bump the voltage up once every hour until I reach house power of 120 volts over a period of many hours?
Thanks for your help!
Like the title says I need to power up an early 90's amplifier power supply that has been sitting for many years. At least 5 and probably closer to 10 since it has seen line voltage. Just the bare power supply, the transistor board has been removed.
It is basically a big Toroidal transformer with rectifier and (4) large 10,000 uf / 90 volt capacitors. Output is +/- 80 volts.
I have a Variac transformer on order. Do I just start from say <10 volts AC and bump the voltage up once every hour until I reach house power of 120 volts over a period of many hours?
Thanks for your help!
Just gradually turn up the Variac to 120VAC over a period of 30 minutes or so. Then let it cook for a few hours.
Keep a DVM on the large caps just in case.
Keep a DVM on the large caps just in case.
Just use a low wattage bulb (DBT). It will be fine after. Give it a couple of minutes all should be good. Remember to discharge the caps properly afterwards if they are not connected to a load. The DBT is fine for job as well.
I always start with checking capacitor leakage, resistor values, and reforming electrolyte capacitors. After that there is no need for variac.