[TMRA] high power resistors

[Tom Szuba]

Thanks Stan,
  
 I looked on line and some folks were using space heaters for load banks.  
Too expensive. 
 I wound up purchasing 4 hot water tank heater elements ($9:50 ea. at 
Menards) 120vac 1000w, that when connected in parallel, equaled the 
resistance I needed, about 1.8 ohms, and exceeded the wattage required, so 
I was safe.  I connected them up today and test it.  The power supply could 
deliver both a dead nuts 40vdc, but a steady current of 22 amps, ran the 
test for 35 minutes, never wavered.
 The cost of the heater elements was cheap compared to the cost of the 
power supply.  I'm going to do a news letter article showing how to 
determine what voltage and wattage you need to build the 'Poor Man's Load 
Bank'.   You can test any power supply that way.
  
 Tom Szuba  K8XXA    
  
  
  

----------------------------------------
 From: "Stan K" <k8ll.ham at gmail.com>
Sent: Friday, August 11, 2017 10:33 AM
To: tampacubs at toast.net
Cc: "Steve Bellner" <w8ter at bex.net>, tmra at mailman.qth.net
Subject: Re: [TMRA] high power resistors   
  I believe I've heard of salt water being used as high power "dummy 
loads." I think they were talking about for testing high power 
transmitters, but it might, maybe, be used for this???  
 Perhaps a Google search would turn up something.
  
 Just a thought....
  73
Stan K8LL
NW Ohio, USA
10-10# 76801
FP# 3255
100WattsAndAWire# 1939
Propagation is our master . . . but sometimes the master is cruel!

     On Aug 11, 2017 10:15 AM, "Tom Szuba" <tampacubs at toast.net> wrote:  To 
All,
 Does anyone have a high power very low Ohm resistor load bank I could
borrow to 'proof' a used Sorenson power supply I bought on line?  Anything
from 1 to 10 ohm, 1500 - 3000 watt rating.  I'm testing 0 - 50 VDC at 0 -
60 Amps.  Just need to know the power supply can deliver the needed 
current
at the specified voltage.  I could parallel higher resistances if I had
multiple resistors and lower wattages.
 73's
 Tom K8XXA

----------------------------------------
 From: "Stephen Bellner" <w8ter at bex.net>
Sent: Thursday, August 10, 2017 8:04 PM
To: "tmra" <tmra at mailman.qth.net>
Subject: [TMRA] Back to the future?
http://forums.qrz.com/index.php?threads/cyber-threats-prompt-return-of-radio
  -for-ship-navigation.577159/

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