[Amps] water purity/conductivity in water cooled, tube

[Jim Thomson]

Date: Tue, 24 Apr 2018 08:58:05 -0500
From: Kim Elmore <cw_de_n5op at sbcglobal.net>
To: Randy <randy at verizon.net>
Cc: amps at contesting.com
Subject: Re: [Amps] water purity/conductivity in water cooled, tube, >
amplifiers

<I dont think this is correct. Every one Ive ever seen is now aluminum. 

> Just wondering out loud... I'd bet some cars have either all-plastic radiators, or, maybe plastic heater cores for the A/C. Maybe that would remove the issues of metal ions from the heat-exchanger. Undoubtedly less efficient at removing heat from the water than  metal, but size cures a lot of ills.
> 
> 
> Randy
> KZ4RV


<Kim N5OP





## No such thing as an all  plastic radiator, does not exist.  
However I have seen  aluminum radiators, that have plastic, vertical  end tanks,
used for eng  rads.  These have fallen out of vogue, nothing but endless problems
with hot coolant eventually leaking where the plastic end tanks morph into the aluminum
cores. 

##  Plastic is useless at  radiating heat.  It does the opposite,  holds heat in..   An all copper
radiator would be the ultimate ticket, but cost prohibitive..and  almost triple the weight of
aluminum.   Aluminum only conducts heat  57 %  vs  copper.  Thats why copper spreaders are used
for final pa transistors, where the cu spreaders  mate to the aluminum finned heat sink. 

Jim  VE7RF