[App_rpt-users] URI's I/O fan control

[John Scoggin]

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 at armymars.net

Telephone: (302) 451-5000

 

 

-----Original Message-----
From: app_rpt-users-bounces at qrvc.com [mailto:app_rpt-users-bounces at qrvc.com] On Behalf Of Randy Hammock
Sent: Thursday, April 02, 2009 1:41 PM
To: app_rpt-users at 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.

 

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