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
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.
···
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
--
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. 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
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
If there are no horses in heaven, then when I die, I want to go
where
they went.
App_rpt-users mailing list
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 HammockSent: Thursday, April 02, 2009 1:41 PM
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
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 mailing list
–
Stephen Brown - ARS K1LNX
Johnson City, TN EM86
http://www.k1lnx.net