[Antennas] Re: Dummy Load ...is it still 50 Ohms

Thu, 29 Apr 2004 23:08:12 -0500

Measured 51.2 ohms

Wn4i wrote:

>Before ANY thing else ....make sure it is still 50 Ohms  ( under 40 ohms or
>over 65  its useless .........
>Some are going lower  and others higher .
>
>73
>Yves Wn4i
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>----- Original Message ----- 
>From: "Bob Nielsen" <[email protected]>
>To: <[email protected]>
>Sent: Thursday, April 29, 2004 11:37 AM
>Subject: Re: [Antennas] What to put in a dummy load
>
>
>  
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>>If you have a local livestock supply store, you will find mineral oil
>>to be much less expensive there than at the drugstore.
>>
>>Bob, N7XY
>>
>>On Thu, Apr 29, 2004 at 01:03:27AM -0500, Herschel McCullough wrote:
>>    
>>
>>>Mineral oil , use it and forget all the rest of the exotic ones.. Your
>>>drugstore has in .. Run it dry, sure for a short while.. Bird will be
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>most
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>>>happy to sell you the new diagraphams and seals, small price to pay to
>>>      
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>have
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>>>a new sealed unit , that most likely will now out live you.. mac/mc
>>>
>>>
>>>----- Original Message -----
>>>From: "Elliott Bill W Civ WRALC/MASTD" <[email protected]>
>>>To: "'Jim Isbell'" <[email protected]>;
>>><[email protected]>
>>>Sent: Wednesday, April 28, 2004 10:22 PM
>>>Subject: RE: [Antennas] What to put in a dummy load
>>>
>>>
>>>      
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>>>>Jim
>>>>
>>>>I had a Heath "Cantenna" many years ago.  As I remember they listed an
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>oil
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>>>>you could use (I don't remember which that was), but, the recommended
>>>>contacting the local power company and getting some transformer oil
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>from
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>>>>them.   Most of the time they would donate a little for PR reasons,
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>and
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>>>they
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>>>>didn't have the procedures to charge for that sale anyway.   This
>>>>transformer oil could stand up to the requirements of heat transfer
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>>>without
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>>>>breaking down.
>>>>
>>>>Good luck on finding a friendly face at the power company.
>>>>
>>>>73, Bill, KJ4O
>>>>
>>>>-----Original Message-----
>>>>From: [email protected]
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>>>[mailto:[email protected]]
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>>>>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
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>empty.
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>>>>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
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>is
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>>>>no place to fill or drain it but I can cut a hole and add a filler cap
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>>>real
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>>>>easy.  Once open I can check for leaks and repair them.  OK, now what
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>is
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>>>the
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>>>>best thing to put in it...or does it really matter that much.....Corn
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>Oil
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>>>is
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>>>>cheap and readily available.  Is there any real advantage to mineral
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>oil?
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>>>>Or is there any real advantage to some exotic concoction that I never
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>>>heard
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>>>>of.  What about a fan and lots of air, and no oil at all.?
>>>>
>>>>- - -
>>>>
>>>>        
>>>>
>>- - -
>>
>>Your moderator for this list is:
>>Larry Wilson KE1HZ [email protected]
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>>    
>>
>
>- - - 
>
>Your moderator for this list is:
>Larry Wilson KE1HZ [email protected]
>_______________________________________________
>Antennas mailing list
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>  
>