Draining the filter caps

[SchecMan]

I'm going to do some work on my Fender Hrdx and have decided that draining the caps is a good idea. I read somewhere to use a 25K 10W cement power resistor to accomplish this. My question, is it OK to use a epoxy coated resister instead of the cement resistor?

Thanks

 

[kmcguitars]

Re: Draining the filter caps

For a good reference go here. http://studentweb.eku.edu/justin_holton/
Half the time when I drain caps I don't even use a resistor. It is a good Idea to use one to eliminate some Pyrotechnics.mg:

 

[Rich_S]

Re: Draining the filter caps

It's the resistance and power-handling capability that matter. Assuming a B+ of about 450 VDC, that 25K resistor will be dissipating about 8 watts for the short time it takes to discharge the caps. So, any 25 K 10-watt resistor will do.

You could also use a 50K 5 watt, but it will take twice as long to discharge the caps. Always make sure you check with a meter to make sure it's dead before starting work.

 

[Scott_F]

Re: Draining the filter caps

Be sure to take off the clips before you start the amp back up....

Pyrotechnics to say the least. Burn baby burn!