[Antennas] What to put in a dummy load
David W Sher
[email protected]
2004年4月29日 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 2004年4月29日 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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