what's your preferred method of discharging your big caps? i'm going to work on my sovtek's tone controls because they don't work.
Cap discharge
Use a large ( 3 watt ) 470 ohm resistor or something similar. You will need to hold it across the cap for at least 30 sec if it is very large in value ( like 20,000uF).The value avoids sparking due to large currents. Caution: Make sure the mains power is OFF !
Hold the resistor with a plier or make an insulated grip for it with a piece of cardboard.
Use a large ( 3 watt ) 470 ohm resistor or something similar. You will need to hold it across the cap for at least 30 sec if it is very large in value ( like 20,000uF).The value avoids sparking due to large currents. Caution: Make sure the mains power is OFF !
Hold the resistor with a plier or make an insulated grip for it with a piece of cardboard.
DISCHARGING CAPS.
Hi,
Hmmm...they should have a bleeder resistor somewhere.
In case they don't- not a very wise practice-you could put a 220K across them and monitor them discharging through a voltmeter.
Don't just short them with a metallic object, it will damage the caps, not to mention the spark you'll see.
Cheers,😉
Hi,
Hmmm...they should have a bleeder resistor somewhere.
In case they don't- not a very wise practice-you could put a 220K across them and monitor them discharging through a voltmeter.
Don't just short them with a metallic object, it will damage the caps, not to mention the spark you'll see.
Cheers,😉
man, this thing is too hard to take apart. i wanted to be like "hey dad, watch this" and then put a screwdriver across or something. i think i'll take this too a tech. its used and i have never had it inspected.
With my tounge. 😛
Nah, I usually watch it with a voltmeter, long as I saw it fall at a rate slower than that which the meter falls at if the contact came loose, and shows some residual, maybe just a few volts - then I short it with a screwdriver or pliers for piece of mind.
If I'm having a slow day sometimes I'll short it with voltage still in it (not to say it's still powered!), but I don't recommend doing this habitually. 😉
Tim
Nah, I usually watch it with a voltmeter, long as I saw it fall at a rate slower than that which the meter falls at if the contact came loose, and shows some residual, maybe just a few volts - then I short it with a screwdriver or pliers for piece of mind.
If I'm having a slow day sometimes I'll short it with voltage still in it (not to say it's still powered!), but I don't recommend doing this habitually. 😉
Tim
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