[Amps] Distilled water in a dummy load ?

Tue Feb 23 23:11:01 EST 2021

I have a 10kW cantenna, a large black drum of water, a pump and a water cooled dummy load.
I picked up the dummy load at Dayton about 15 years ago.
73
Bill wa4lav

________________________________
From: Amps <amps-bounces at contesting.com> on behalf of gd0tep at manx.net <gd0tep at manx.net>
Sent: Tuesday, February 23, 2021 7:03 PM
To: 'Amps group' <amps at contesting.com>
Subject: Re: [Amps] Distilled water in a dummy load ?

CAUTION: External Sender

My Altronic 9715E3 is a water cooled Load. I use tap water run through it to drain (really soft water here)

As of yet, no problems with it. But then it never gets anywhere near rated limit.

50 ohms, 60hz to 0.8Ghz 15kw

Picked it up cheap before I retired.

73 Andy
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-----Original Message-----
From: Amps <amps-bounces at contesting.com> On Behalf Of Richard Solomon
Sent: 23 February 2021 21:14
To: Amps group <amps at contesting.com>
Subject: Re: [Amps] Distilled water in a dummy load ?

Better yet, a Bird 8890. 2,500 Watts CCS.
Max SWR 1.25 to 2 GHz.

Snagged one of the auction site a few years ago for short money.

73, Dick, W1KSZ

On Tue, Feb 23, 2021 at 1:31 PM Bob Darlington <rdarlington at gmail.com>
wrote:

> Guys, c'mon.  Bird 8201.    $200 used, 500W continuous forever, 5kW short
> term.   Air cooled, oil (mineral) filled, parts available, QC connectors
> like on our Model 43 meters, 1.25:1 max out to 2.5GHz,  and it'll outlive
> all of us.   Sure, I can make mine slightly warm to the touch txing RTTY at
> the legal limit into it, but otherwise it stays cold to the touch
> doing anything else.
>
> -Bob N3XKB
>
> On Sun, Feb 21, 2021 at 1:46 PM MU 4CX250B <4cx250b at miamioh.edu> wrote:
>
> > My instinct is that mineral oil would be a better coolant than
> > distilled water, with no corrosion issues.  You can buy it at any
> > pharmacy, and while it isn’t rated at quite as high a temperature as
> > transformer oil, it works quite well. I used it in a Cantenna for 30
> > years! As I recall, it was recommended byHeathkit  as a substitute
> > for transformer oil.
> > 73,
> > Jim w8zr
> >
> > Sent from my iPhone
> >
> > > On Feb 21, 2021, at 1:35 PM, Geert Jan de Groot <pe1hzg at xs4all.nl>
> > wrote:
> > >
> > > 
> > >> Is it possible to use  distilled water in a hb  dummy load ?
> > >> DL  consist of  4 x  200 ohm globars, wired in parallel..in an 8
> gallon
> > container.
> > >> I welded  4 x 3 inch OD  thick wall Alum pipes together, 2
> > >> stacked
> > above 2.
> > >> One resistor resides  dead center in each alum pipe.   Each resistor
> is
> > a
> > >> new  globar  type  SP,  12 inches long  x 1 inch in diameter.
> > >
> > > Personally, I'm using the Ameritron ADL2500, which is 4 hefty
> > > resistors
> > in a case with a fan. I modified it so it automatically switches the
> > fab
> to
> > reduce the noise.
> > >
> > > No leakage, no corrosion, no mess if I drop it or I kick it. Much
> > lighter. No dangerous oils, and my shack doesn't smell like a chip
> > shop when I'm doing some testing.
> > >
> > > 73, Geert Jan PE1HZG
> > >
> > >
> > > _______________________________________________
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