[SOC] Looking to build a Dummy (Load)

[Carl Strode]

Use the formula you "learned" before you took the exam for your license.

Tom McCulloch wrote:
> I'm a qrp guy and have been operating an Elecraft K2 at between 5 and 10 
> watts for a number of years, and have been very happy with it...Not wanting 
> to leave well enough alone, I got my hands on a 100 watt amp (also made by 
> Elecraft) and want to built a dummy load that will handle the 100 watts.
>
> I see OHR makes one for about $35 +s/h but it looks likes its just a bunch 
> of resistors:
>
> http://www.ohr.com/rfl100.htm
>
> Here is the SOC part of my question -- 
>
> 1) I guess I can figure out the value of 20 resistors I'd need to get a 50 
> ohm result (well, maybe I can't.)  But what wattage should I use to handle 
> 100 watts?  Am I going in parallel (yea, parallel, right? otherwise I'd need 
> 100 watt resistors???, right?)  OK, so does that mean I'd need 20 five watt 
> resistors in parallel?
>
> 2)  So what kind of resistors do I order from Mouser?  I keep reading that 
> wire wound resistors are not good for RF.  Also it seems carbon resistors 
> come in smaller wattages.  How about these ---as quoted from Mouser "  5W 
> Small Metal Oxide Resistors  5% Tol "  The picture in Mouser looks kind of 
> like the OHR picture and the price seems reasonable at $0.49 each.
>
> I appreciate your help and understanding with this.
>
> Tom
> WB2QDG
> SOC # (I forget)
>
> PS - OK, I really could use help with the value of those 20 resistors to get 
> them 50 ohms :)
> tnx Tom
>
>
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