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?
Chuck WB2EDV ----- Original Message ----- From: "hl31943" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, April 14, 2006 3:38 PM Subject: [Repeater-Builder] Re: Fan timer > -I think I paid about $25 plus shipping. True, the logic can run the > fan while the repeater is keyed up, but I needed a timer to keep the > fan on, in this case 6 minutes, to let the PA cool down. I'm using a > 75W UHF Mitrek running about 50W, so the additional air flow keeps > things from frying. And, that's the correct link. I don't think they > sell direct. > 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/
