doughere wrote: I installed an 8 Ohm 20 watt resistor from Radio Shack, does the job just right. Less than $3.00 for the resistor, install it in either leg of the fan. Doug
Perfect. I'll give this idea a try….. Thank you!!!
edatlanta wrote: I would check with Jayco and find out the make/model of the fan involved and then check with the manufacturer to see if that motor can be slowed. Some can and some can not.
Unless I'm mistaken. I believe that any motor can be slowed down. However, if the juice is less than what the motor is intended for, it will burn out quicker. For example in HVAC, too high and/or too low of juice will burn out motors quicker. Usually when motors wears out more, they use more juice, thus burning them out and acid tests of refrigerants usually proves the case.
X3 on the Pulse Width Modulation. Bought one from the same guy in China, works wonderful, and just ordered another. Makes a real nice clean install, and you don't have to worry about resistors or cheap 3 speed controls getting too hot.
Takes about 3 weeks to get here, bought it thru Pay Pal
Paul
doughere wrote: I installed an 8 Ohm 20 watt resistor from Radio Shack, does the job just right. Less than $3.00 for the resistor, install it in either leg of the fan. Doug
edatlanta wrote: I would check with Jayco and find out the make/model of the fan involved and then check with the manufacturer to see if that motor can be slowed. Some can and some can not.
My '05 Jayco had the higher speed Ventline fan in it. When I bought the '07, I was surprised that the fan did not run as fast. I contacted Ventline, The customer service person said that Jayco went with a slower fan in '07. I would gladly trade the slow fan in my '09 for the faster and more powerful one that the OP has in his '06...hint, hint !!
Well a 10K resistor will indeed slow it down.. WAY DOWN (As in it likely will not turn)
In the old days cars had variable speed (not multi speed) heater fans (Blowers) on them.. The magic was due to a variable resistor, Just a couple of ohms as I recall.. Some auto parts stores still have those. Alas I was unable to find one.
Another suggestion would be light bulbs, You can put 12 volt lamps (in parallel if necessary) in series with the motor, that way you get light and fan at the same time, The more lamps in parallel, the faster the fan fans.
Nothin adds excitment like something that is none of your business
Kenwood TS-2000 housed in a 2005 Damon Intruder 377
Dutch_12078 wrote: I replaced the OEM bathroom fan in our Coachmen with two 12-volt computer fans. They're very quiet and move nearly as much air as the original fan.
Within my remote country region, 20W / 8 ohms / 5% wirewound resistors are "special order" and very few folks sell them. Replacement RV fans with L/M/H switch is way too expensive. Now.... I'm investigating your computer idea. Within my region, 120mm 12V computer case fans sell for $8 - $14 range (depending on CFM ratings). And, I can get them in 30 CFM all the way up to 75 CFM each. And if needed, I can also get 80mm or even 140mm size fans.
For your RV fan customization, how much airflow "CFM" was each fan? thanks.
Offline
