[Antennas] What to put in a dummy load

Thu, 29 Apr 2004 10:28:37 -0500

Transformer oil probably contained PCBs (polychlorinated biphenmyls)
which have been determined to be an envbioronmental hazzard, are illegal
to use, and haven't been produced for 30+ years.  You might want to try a
silicone oil.

Dave              W9LYA
"What wrought doG hath?"

On Thu, 29 Apr 2004 03:22:14 -0000 Elliott Bill W Civ WRALC/MASTD
<[email protected]> writes:
>  Jim
> 
> I had a Heath "Cantenna" many years ago.  As I remember they listed 
> an oil
> you could use (I don't remember which that was), but, the 
> recommended
> contacting the local power company and getting some transformer oil 
> from
> them.   Most of the time they would donate a little for PR reasons, 
> and they
> didn't have the procedures to charge for that sale anyway.   This
> transformer oil could stand up to the requirements of heat transfer 
> without
> breaking down.
> 
> Good luck on finding a friendly face at the power company.
> 
> 73, Bill, KJ4O
> 
> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]]
> On Behalf Of Jim Isbell
> Sent: Wednesday, April 28, 2004 22:14
> To: Mail list Antennas
> Subject: [Antennas] What to put in a dummy load
> 
> I have a 200W dummy load that apparently once held oil. It is now 
> empty. 
> At least that assumption is made on the basis that the bottom of the 
> 
> container has a bellows loaded bottom to allow for expansion.   
> There is 
> no place to fill or drain it but I can cut a hole and add a filler 
> cap real
> easy.  Once open I can check for leaks and repair them.  OK, now 
> what is the
> best thing to put in it...or does it really matter that 
> much.....Corn Oil is
> cheap and readily available.  Is there any real advantage to mineral 
> oil?
> Or is there any real advantage to some exotic concoction that I 
> never heard
> of.  What about a fan and lots of air, and no oil at all.?
> 
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