Re: [TenTec] Noise from Fans

[K8JHR <jrichards@k8jhr.com>]

I made a fan built into my shelf system to help the amp vent hot air. 
I used an Off-On-Off switch with a single resistor to accomplish that 
feat.   This gives me high and low speed with just a flick of the switch.
Why is a diode better than a resistor?  OR is it just another way to 
skin the same cat?
I will have to send you some photos off list, as it turned out nicely. 
I did this even though I think I cut enough air holes in the shelf to 
accommodate the hot air, but figured this would be better in any case - 
cannot be too safe, ya know.
-------------------  K8JHR  --------------------

On 3/7/2014 2:51 AM, Rick - DJ0IP / NJ0IP wrote:
> That is very good.
> Try using diodes instead of a resistor.
> Use a string of 1N4004 or similar.
> Each diode drops a good half volt.
> You can even make it multi speed if you add a small switch.
> ______________________________________________