Re: [Repeater-Builder] Cheap "Tunnel" Heatsink

Sat, 11 Feb 2006 23:19:39 -0800

Years ago I saw a homebrew version of that:

Twenty tungsten auto headlights in a metal box, with a switch
for each bulb, and a couple of heater blowers.  Bulbs were
50 cents at the auto junkyard, as were the headlight switches. 
They were wired so that the parking light position (half-way out)
lit up the low beam, and the headlight position (all the way out)
lit up the high beam as well.

A regular wall thermostat was used along with a relay to run
the heater blowers (off of the 12v input).

Cheap to build and worked just fine....

Mike WA6ILQ


At 10:46 PM 2/11/06, you wrote:

Brett, I have a copy of a commercial "Load Bank" which is nothing more than
a bunch of large resistors in a case controlled by switches.
I'll dig it out and scan it for you....
 
These people get $3,000.00 for this package !  I have the stuff to build one
and have about $75.00 invested so far.....
 
73 John VE3AMZ
----- Original Message -----
From: Brett
To: [email protected]
Sent: Saturday, February 11, 2006 9:28 PM
Subject: Re: [Repeater-Builder] Cheap "Tunnel" Heatsink

Hi guys does anyone have that circuit diagram I need to build one to test 12 to 60 volt supply.
Thanks in advance.
Brett
 
----- Original Message -----
From: [EMAIL PROTECTED]
To: [email protected]
Sent: Sunday, February 12, 2006 10:01 AM
Subject: Re: [Repeater-Builder] Cheap "Tunnel" Heatsink

In a message dated 2/11/2006 3:10:54 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
http://www.ve3tjd.com/pictures/tech%20stuff/

What a perfect heatsink for that variable power supply load that was bouncing around on R-B about a year or two ago. You could vary the Amp Load on your power supply using a variable pot control.
Gary  K2UQ
 








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