Re: [Amps] water purity/conductivity in water cooled, tube, > amplifiers

["Roger (K8RI)" <k8ri@rogerhalstead.com>]

Just think, all that's between your auto-transmission oil and the engine 
coolant is some very thin aluminum bent into complex shapes inside the 
intercooler
They do fail!

73, Roger (K8RI)


On 4/28/2018 4:22 PM, Donald Fox via Amps wrote:
> Kim:
>
> You are correct. Years ago, the radiators and heater cores were brass or 
> copper. They could be repaired by soldering if the damage was not too extensive.
> These days, the manufacturers are more concerned with less weight and cost, so 
> they use an aluminum core with plastic for the side tanks that are crimped on 
> with a rubber gasket in between.
>
> Plastic would not conduct the heat from the anti freeze into the air passing 
> around/through it.
>
> Don   N8ECH
>
>
> --------------------------------------------
> On Tue, 4/24/18, Kim Elmore <cw_de_n5op@sbcglobal.net> wrote:
>
>   Subject: Re: [Amps] water purity/conductivity in water cooled, tube, > 
> amplifiers
>   To: "Randy" <randy@verizon.net>
>   Cc: amps@contesting.com
>   Date: Tuesday, April 24, 2018, 9:58 AM
>   
>   I don’t think this is correct.
>   Every one I’ve ever seen is now aluminum.
>   
>   Kim N5OP
>   
>   "People that make music together cannot be
>   enemies, at least as long as the music lasts." -- Paul
>   Hindemith
>   
>   > On Apr 23,
>   2018, at 22:33, Randy <randy@verizon.net>
>   wrote:
>   >
>   >> On
>   4/23/2018 9:28 AM, amps-request@contesting.com
>   wrote:
>   >>
>   ----------------------------------------------------------------------
>   >>
>   >>
>   >> I know that really pure water is
>   actually corrosive and will do it's
>   >> best to gain ions in order to get to
>   some natural level of
>   >>
>   minerals/contaminants.??? I built the coolers out of several
>   pieces of
>   >> brass and hard silver
>   brazed it all together.? I know the electrical
>   >> current will cause an etching or
>   eroding effect of the materials in the
>   >> cooler, but I used what I had.?? At
>   this point, I have no idea how often
>   >> I will changing? out the water.? Could
>   be after only 10 hours of use, or
>   >>
>   it may be 100 hours and the cooler may rot out in no
>   time.
>   >>
>   >>
>   >> ------------------------------
>   >>
>   >>
>   > 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
>   >
>   >
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--
Roger (K8RI)


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