## Good point Carl. These are new globar type SP.....and they are glass
bodied,
designed for oil or water immersion. Mine are 1 inch od x 12 inch long...
and have a .25 inch thick wall. Beware, the old type CX globars, made in
the
60s are NOT glass bodied, and are designed for air cooling only. They use
a
.25 inch thicker wall on them. IF you try and immerse them in oil, they
will
absorb the oil, and resistance will increase. this info came from globar
engineer a while back.
Jim VE7RF
-----Original Message-----
From: Carl
Sent: Sunday, August 11, 2013 11:07 AM
To: Jim Thomson ; amps@contesting.com
Subject: Re: [Amps] Dummy load. Can distilled water be used instead of oil ?
Some resistors are not made to be immersed, check specs first.
Carl
KM1H
----- Original Message -----
From: "Jim Thomson" <jim.thom@telus.net>
To: <amps@contesting.com>
Sent: Sunday, August 11, 2013 7:52 AM
Subject: [Amps] Dummy load. Can distilled water be used instead of oil ?
I built a dummy load consisting of 4 x 200 ohm globars in parallel. Each
resistor is 12 inchs long x 1 inch OD.
Each resistor resides in its own 3 inch od x 12 inch long AL pipe. All 4
x AL pipes are heliarc welded together.
The entire mess will sit in a 7 gal new paint can. A 5 gal can + top
part of a 2nd can were brazed together.
A 7-16 DIN was installed dead center in the top lid....along with a
pressure relief tube, off to one side.
Instead of xfmr oil, can distilled water be used instead ?? It will
only be used on 160-10m..and maybe 6m.
If something goes terribly wrong, Id rather have water all over the
basement floor vs oil. Distilled water is
an insulator. Heck, Bird + CD have water loads that use tap water. AG6K
depicts a hb water load...with a
single 500W resistor inside some pvc tube and a garden hose fitting on one
end....and coax connector on the
other end.
I realize water boils at 212 F. Has anybody tried distilled water in a 1
gal dummy load ? Is it still 50 ohms ?
Jim VE7RF
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