Fwd: Re: heathkit dummy load

[W. Sushak]

To all:

per Mr. Lyon's comment, he is correct.  At the time the Cantenna (and it's
manual with specifications) came out, the consequences of PCB's were not
known...When cleaning out my shack, found one with said "old" transformer
oil.  It went immediately to the hazardous waste at the local disposal
site.  PCB's contain some of the most carcinogenic material currently
known.  The material, unfortunately, is also absorptive (that is, it is
absorbed by touch through the skin).  Unless you are _sure_ you are dealing
with non-PCB transformer oil, stick with the mineral oil....Interesting to
watch the employees' reactions at the hazardous waste site when you tell
them what it is....a good indication to stay away from it!!!

...waynes

>X-Mailer: Juno 1.49
>Date:         Thu, 20 May 1999 23:46:56 EDT
>Reply-To: stu_w6cux at JUNO.COM
>Sender: Heathkit Owners and Collectors List <HEATH at LISTSERV.TEMPE.GOV>
>From: Stewart Lyon <stu_w6cux at JUNO.COM>
>Subject:      Re: heathkit dummy load
>To: HEATH at LISTSERV.TEMPE.GOV
>
>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
>>
>>
>
>--- --- --- --- --- --- --- --- --- --- --- --- --- --
>To subscribe: listserv at listserv.tempe.gov
>and in body: subscribe HEATH yourfirstname yourlastname
>To unsubscribe:  listserv at listserv.tempe.gov
>and in body: signoff HEATH
>Archives for HEATH: http://www.tempe.gov/archives
>--- --- --- --- --- --- --- --- --- --- --- --- --- --

--- --- --- --- --- --- --- --- --- --- --- --- --- --
To subscribe: listserv at listserv.tempe.gov
and in body: subscribe HEATH yourfirstname yourlastname
To unsubscribe:  listserv at listserv.tempe.gov
and in body: signoff HEATH
Archives for HEATH: http://www.tempe.gov/archives
--- --- --- --- --- --- --- --- --- --- --- --- --- --