[Antennas] What to put in a dummy load

Thu, 29 Apr 2004 08:37:32 -0700

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 most
> happy to sell you the new diagraphams and seals, small price to pay to have
> 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
> 
> 
> > 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.?
> >
> > - - -
> >