I posted a note two weeks ago about losing OTA signal strength on my Mits. receiver. Due to several of you talking about fans and heat, I purchased a Radio Shack fan and placed it so that air is going over the top and through the vents. Lo and behold, no more loss of strength!!! I had it on yesterday for 12 hours and the receiver stayed cool and the OTA channels maintained their 100 signal throughout. you would think that a $600 receiver would not need a $10 fan but it did. Thanks to you all.