can i run a 350watt fortron psu with 7v panaflo?

dinde · Post by **dinde** » Fri Apr 04, 2003 7:57 pm

well i installed the 12 v in my psu. and its kinda lous since its shooting straight outta the back (im assuming the 120 is gona be kinda noisy too, so i think ill build something like this http://www.pcmuet.net/product_info.asp?iPID=228 .
except instad of just covering the psu fan, making it bigger so till cover the exhaust too

im planing on making this outta cardboard (maybe metal if ican afford a dremel haha) and line the inside w/ sound dampening material.

Post by **NeilBlanchard** » Sat Apr 05, 2003 5:08 am

Hello:

Does that PS have a fan control circuit? Did you connect the Panaflo to it? Which Panaflo model do you have?

dinde · Post by **dinde** » Sat Apr 05, 2003 9:41 am

no it doesnt have a control circuit. (itll stay at the same speed all the time). second, i have a panaflo l1a 80mm hooked up to my rheobus in it.

larrymoencurly · Post by **larrymoencurly** » Sun Apr 06, 2003 12:57 am

If it's a model FSP350-60BT (or even an FSP300-60BT), maybe the temperature sensor was merely left out because the circuit board, next to the heatsink for the low voltage side (close to all the wires coming out of the PSU), has room for two missing components, resistor R15 and thermistor TH1. I haven't been able to check one more closely. For some reason, the thermistor or resistor are wired in series with a small glass diode, D1, with a hole underneath it in the circuit board (cooling?).

Has anybody with more expertise taken a look at this?

dinde · Post by **dinde** » Sun Apr 06, 2003 9:14 am

larrymoencurly wrote:If it's a model FSP350-60BT (or even an FSP300-60BT), maybe the temperature sensor was merely left out because the circuit board, next to the heatsink for the low voltage side (close to all the wires coming out of the PSU), has room for two missing components, resistor R15 and thermistor TH1. I haven't been able to check one more closely. For some reason, the thermistor or resistor are wired in series with a small glass diode, D1, with a hole underneath it in the circuit board (cooling?).

Has anybody with more expertise taken a look at this?

i dont follow =\

dukla2000 · Post by **dukla2000** » Sun Apr 06, 2003 2:13 pm

dinde - to answer your original question my opinion is a Panaflo L1A at 7V should be OK.

It mainly depends on your max ambient temps. At 7V the L1A is blowing about 14cfm. Lets assume your components are actually using 200W (extremely unlikely, should be closer to 100W). And the psu is 65% efficient. Then you have 108W of heat being dissipated inside the psu. With 14cfm flowing through the psu you can expect a 13.6C temp rise.
{ deltaC = (1.76 * W) / cfm } All else being equal, this is fine. (The stuff that is not equal is the actual airflow inside the psu case, static pressure etc. Even so, even a 25 or 30C rise could be OK depending on the ambient you start with.)

larrymoencurly - I have an FSP300-60BT that does have a 'noise-killer'. Can't remember the exact nature of the components but can strip it and take a look if you need.

larrymoencurly · Post by **larrymoencurly** » Sun Apr 06, 2003 7:57 pm

Both the FSP350-60BT and FSP300-60BT I saw at the store had "Noise Killer" written on their boxes, but I know that the 300W model runs the fan at full speed, and I didn't see any temperature sensor in the 350W, unless the sensor was a tiny surface mount components on one of the small vertical circuit boards (one was the main regulator controller, the other was for the +3.3V regulator) soldered to the large board.

can i run a 350watt fortron psu with 7v panaflo?

can i run a 350watt fortron psu with 7v panaflo?

How did you connect the fan?