Hello to the group, I wonder if anyone would like to share a timing circuit and it's programming use with one of the URI I/O pins, lets say to control a fan to keep the transmitter cool on transmit and off when not in transmit. Thanks Will / W4WWM
On Apr 1, 2009, at 6:33 PM, Will Wright wrote:
Hello to the group,
I wonder if anyone would like to share a timing circuit and it's programming use with one of the URI I/O pins, lets say to control a fan to keep the transmitter cool on transmit and off when not in transmit. Thanks
I prefer mounting a thermal switch on the heat sink of the transmitter. This way, the fan is controlled by real need, not some imagined arbitrary need. When the ambient temp is cool, the fan runs very little. When the ambient temp is elevated, the fan runs longer. But the transmitter stays a comfortable temp. -- Randy Hammock KC6HUR http://kc6hur.net/~rhammock/ http://irlp.kc6hur.net/ If there are no horses in heaven, then when I die, I want to go where they went.
All -- You might find this page useful: http://www.irlpcables.com/alinco_drxx5t_mobile.html I agree with Randy - when it comes to "cooking my finals", I prefer a simple solution. If you really want to do it right, use a normally-open thermostat to control the fan power and a normally-closed thermostat to control the transmitter main power. :-) (obviously with values of operation far enough apart NOT to fall into each other's dead-band!) 73, john ____________________________________________ John K Scoggin, Jr. W3JKS/AAT3BF/AAM3EDE/AAA9SL "WLMM - Sic faciunt omnes (Winlink 2000, Everyone is doing it.)" US Army Military Affiliate Radio System Delaware Gateway Station AAB3DE Special Consultant - Technology Emergency Operations Officer - Delaware ARRL Assistant Section Manager - Delaware Email: aat3bf@armymars.net Telephone: (302) 451-5000 -----Original Message----- From: app_rpt-users-bounces@qrvc.com [mailto:app_rpt-users-bounces@qrvc.com] On Behalf Of Randy Hammock Sent: Thursday, April 02, 2009 1:41 PM To: app_rpt-users@qrvc.com Subject: Re: [App_rpt-users] URI's I/O fan control On Apr 1, 2009, at 6:33 PM, Will Wright wrote:
Hello to the group,
I wonder if anyone would like to share a timing circuit and it's
programming use with one of the URI I/O pins, lets say to control a
fan
to keep the transmitter cool on transmit and off when not in transmit.
Thanks
I prefer mounting a thermal switch on the heat sink of the transmitter. This way, the fan is controlled by real need, not some imagined arbitrary need. When the ambient temp is cool, the fan runs very little. When the ambient temp is elevated, the fan runs longer. But the transmitter stays a comfortable temp. -- Randy Hammock KC6HUR http://kc6hur.net/~rhammock/ http://irlp.kc6hur.net/ If there are no horses in heaven, then when I die, I want to go where they went. _______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users
I've got this same problem myself and I found this, I haven't put one together yet, but it looks promising: http://www.heatsink-guide.com/content.php?content=control.shtml 73 Stephen K1LNX On Thu, Apr 2, 2009 at 2:17 PM, John Scoggin <aat3bf@armymars.net> wrote:
All --
You might find this page useful: http://www.irlpcables.com/alinco_drxx5t_mobile.html
I agree with Randy – when it comes to “cooking my finals”, I prefer a simple solution. If you really want to do it right, use a normally-open thermostat to control the fan power and a normally-closed thermostat to control the transmitter main power. J (obviously with values of operation far enough apart NOT to fall into each other’s dead-band!)
73,
john
____________________________________________
John K Scoggin, Jr. W3JKS/AAT3BF/AAM3EDE/AAA9SL
"WLMM - Sic faciunt omnes (Winlink 2000, Everyone is doing it.)"
US Army Military Affiliate Radio System
Delaware Gateway Station AAB3DE
Special Consultant - Technology
Emergency Operations Officer - Delaware
ARRL Assistant Section Manager - Delaware
Email: aat3bf@armymars.net
Telephone: (302) 451-5000
-----Original Message----- From: app_rpt-users-bounces@qrvc.com [mailto: app_rpt-users-bounces@qrvc.com] On Behalf Of Randy Hammock Sent: Thursday, April 02, 2009 1:41 PM To: app_rpt-users@qrvc.com Subject: Re: [App_rpt-users] URI's I/O fan control
On Apr 1, 2009, at 6:33 PM, Will Wright wrote:
Hello to the group,
I wonder if anyone would like to share a timing circuit and it's
programming use with one of the URI I/O pins, lets say to control a
fan
to keep the transmitter cool on transmit and off when not in transmit.
Thanks
I prefer mounting a thermal switch on the heat sink of the
transmitter. This way, the fan is controlled by real need, not some
imagined arbitrary need. When the ambient temp is cool, the fan runs
very little. When the ambient temp is elevated, the fan runs longer.
But the transmitter stays a comfortable temp.
--
Randy Hammock KC6HUR
http://kc6hur.net/~rhammock/ <http://kc6hur.net/%7Erhammock/>
If there are no horses in heaven, then when I die, I want to go where
they went.
_______________________________________________
App_rpt-users mailing list
App_rpt-users@qrvc.com
http://qrvc.com/mailman/listinfo/app_rpt-users
_______________________________________________ App_rpt-users mailing list App_rpt-users@qrvc.com http://qrvc.com/mailman/listinfo/app_rpt-users
-- Stephen Brown - ARS K1LNX Johnson City, TN EM86 http://www.k1lnx.net
participants (4)
-
John Scoggin -
Randy Hammock -
Stephen - K1LNX -
Will Wright