Heathkit dummy load

[Misic, George J.]

Stu and Heathens,

While I would not suggest bathing in PCB oil, it is not the health hazard
that it was made out to be.  Its use in high power distribution transformers
is MANDATED in some European countries to this day.  Simply use caution,
minimize exposure [as you would with any petroleum product], and clean up
when you are done.  73.

George KE8RN

> -----Original Message-----
> From: Stewart Lyon [SMTP:stu_w6cux at juno.com]
> Sent: Thursday, May 20, 1999 11:47 PM
> To:   HEATH at LISTSERV.TEMPE.GOV
> Subject:      Re: heathkit dummy load
>
> One of the things you have to worry about when considering transformer
> oil for the Cantenna and that's PCBs.  Not sure what it means but it's
> suppositively nasty stuff that was in all transformer oils about the time
> Heath first came out with the HN-31. I got a gallon of it gratis from the
> LA power co. and it is still in my Cantenna.  I'm afraid to open it up to
> replace the power resistor with the new one I got from Ed Mosher.
>
> I wonder if the numbers quoted by W2CNB were with "old" or "new"
> transformer oil?? The "new" stuff is less efficient.  I would play it
> safe and use mineral oil.
>
> 73, Stu - W6CUX
> Winnetka, CA
> ARRL Life Member
>
> On Thu, 20 May 1999 22:59:13 -0400 "Robert A. Taylor"
> <rat1932 at TWCNY.RR.COM> writes:
> >The difference in heat dissipation between mineral oil and transformer
> >oil for practical uses of a dummy load are not  really significant.
> >Consider power input vs. time power is applied to the load; for a given
> power
> >input here are the times the Cantenna can dissipate it for mineral oil
> and
> >then transformer oil.
> >
> >375 w - both are the same at 30 minutes.
> >500 w - 19 min vs. 22 min.
> >750 w - 5 min vs. 12 min.
> >1000 w - 2 min vs. 9 min.
> >
> >This data is from the Heath Cantenna specification dated 11-9-62.
> >
> >73's Bob, W2CNB
> >
> >
>
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