On 11/18/24 16:45, Jay Hennigan via Jukebox-list wrote:
On 11/18/24 14:36, M De Simone via Jukebox-list wrote:
Hey there esteemed members, seems like I’m on a run with questions lately. I need to replace the 25k section of the dual value 20watt “standee” resistor in this amplifier from a Seeburg V200. My question: is each section 20watts or is it 10watts per section, for a total of 20watts?
The 25K section is between the 315 volt line and ground. P=E^2/R so in normal operation that section dissipates 3.969 watts. The 2500 ohm section drops 85 volts so it dissipates 2.89 watts in normal operation.
Your two 5W resistors in parallel should be just fine.
I see you said in series, rather than parallel. Assuming that they're close in value like two 12K resistors, you'll still be fine. If they're not close in value, the higher resistance one will consume more power. If in parallel, the lower resistance one will consume more power.
Power resistors tend to run hot. Don't be surprised if they're hot to the touch even at roughly 4 watts total dissipation.