I can believe that with a jamb-packed cabinet of electronics. A repeater cabinet typically has lots of air circulation and extra space.
To each their own, I guess. Chuck WB2EDV ----- Original Message ----- From: "Tony VE6MVP" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, April 14, 2006 4:10 PM Subject: Re: [Repeater-Builder] Re: Fan timer > At 03:56 PM 2006/04/14 -0400, you wrote: > > >Maybe I'm missing something here, but I've never subscribed to the theory > >of > >having fans run beyond PTT. What purpose does it serve? The transistors > >are > >generating heat only when they are "on." As soon as they are "off" they > >begin to cool down on their own. If the fans are doing their job, they > >are > >keeping temperatures to a prescribed level the entire duration of > >transmit. > >While running the fans beyond the end of transmit will cool the finals > >after > >the end of the QSO quicker than without, why should it matter? > > FWIW our clients in the mid 1980s had scheduled visits from IBM to add > some > circuitry to the IBM S/38 series of minicomputers to keep the fans running > for an extra five minutes after the computer was turned down. These were > computers slightly larger a standard chest freezer. Hard drives were in > a separate enclosure They were having problems with temperatures inside > the circuitry rising after the power and fans were turned off > > Tony > > > > > > > Yahoo! Groups Links > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
