[Amps] Salt water load

Roger sub1 at rogerhalstead.com
Sat Jul 17 10:21:53 PDT 2010



On 7/17/2010 8:09 AM, Ron Youvan wrote:
> Martin Sole wrote:
>
>    
>> This is my concern.
>>      
>    
>> I built a saltwater load in a 500gr coffee jar, it certainly works as
>> suggested. I have not tried it with more than 100 watts but I did put power
>> into it for a fair few minutes. The outer of the jar had noticeably warmed
>> but I didn't conduct any tests of a more scientific nature. Though I have
>> not used the load in several months the water in the jar looks essentially
>> as it did originally. Will have to measure it again when I get home.
>>      
>    
>> I'm not (yet) comfortable with the thought of power being dissipated in an
>> un screened device such as this. In one of the articles I have seen it
>> mentioned not using a conductive container but I cannot see why that would
>> not work. Take a metal can and insert a single conductor into the centre of
>> the salt water such that the container acts as the other conductor and
>> essentially screens the load at the same time. Not tried this yet but seems
>> to me it would be the same thing.
>>      
>     A conductive container must be able to withstand the sodium chloride.  Stainless steel can not
> withstand the sodium chloride for very long at elevated temperatures.
>    

Build the container out of PVC, or purchase one. Put it in one of the 5 
gallon paint cans and install a coax connector in the center of the lid 
as with the cantennas. Put a PVC vent through lid.

73

Roger (K8RI)


More information about the Amps mailing list