RE: resistors

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dwight Harm by way of Terry Fritz <teslalist-at-qwest-dot-net>" <dwighth-at-traxsoft-dot-com>

You'd need two 10W 1600 ohm resistors.  When you put resistors in parallel,
the effective resistance is

R = 1 / ( 1/r1 + 1/r2 + ... + 1/Rn )

If all the Ri are equal, then R = R1/n, e.g., two 1600 ohm resistors in
parallel give an effective resistance of 1600/2 = 800 ohms.

Dwight.

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Friday, February 28, 2003 4:28 PM

Original poster: "Rodney Goolsby by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <jeronimo-at-bright-dot-net>

Is it ok to use two 10 watt 800 ohm wire wound resistors in parallel
instead of a single 20 watt 800 ohm resistor in an r/f filter circuit?  If
so this is about 50% cheaper.