[Antennas] What to put in a dummy load
Terry Fletcher
Terry Fletcher <[email protected]>
2004年4月29日 07:54:13 -0500
I seem to remember that transformer oil has (or had) an enviromentally
unfriendly compound in it. So it may not be available. A recent
magazine article (Issue #2 Homebrewer p 42) recommended mineral oil.
I'd use that.
72/3 Terry, WA0ITP
********************************************
Elliott Bill W Civ WRALC/MASTD wrote:
> 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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