Almost anything will work as long as it's not flamable at the
temperatures we'd normally run a dummy load. Then some fluids smell and
are best avoided. David pretty well covered it. The Handbook quotation
is pretty much on except they made some mistakes in reasons and
terminology. OTOH their results are OK. Silicone oil, AKA 200 fluid from
Dow Corning works very well in the lower CS region. I'd stick to 200 CS
or less. I think around 20 or 10 CS it's sold and repackaged as dry fly
fluid. It's called an irritant, but so is water in the hazmat list.
They tell you not to inhale it or they did 12 years ago. <:-))
73
Roger (K8RI)
Carl wrote:
> I wonder how synthetic transmission fluid will work? It sure cools down the
> temperature in my vintage drag race car.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Per Molund" <pmolund@online.no>
> To: "RICHARD SOLOMON" <w1ksz@q.com>; "Amplifier Reflector"
> <amps@contesting.com>
> Sent: Wednesday, July 29, 2009 3:12 PM
> Subject: Re: [Amps] Dummy Load "Oil"
>
>
>
>> I have refilled a couple Bird Tenuline 8329 with Shell Diala DX
>> transformer oil which happens to be the same oil my local utility
>> company is using in their power transformers. I assume this oil is
>> quite similar to Exxon Univolt 61 or Nynas. The use of mineral
>> transformer oil will derate the dummy load a bit compared to
>> siliccone oil, but I have not had any problems due to this. As far as
>> I have seen Bird use mineral oil in most of the smaller dummyloads up
>> to about 1 kW (Oil P/N 5-030-3), while the larger ones use DC-200
>> Silicon Oil (P/N 5-1070-2). If I my memory serves me right, the old
>> Tenuline 8327 (1 kW) and 8329 (2 kW) are the same mechanical units,
>> the difference between them are mineral oil vs. silicone oil. I am
>> not sure if this is the same with the current -300 models.
>>
>> I would suggest You stop by a local power utility maintenance shop if
>> possible and ask for a few gallon of transformer oil, You may be lucky.
>>
>> regards,
>>
>> Per - LA9XKA
>>
>>
>>
>> At 17:11 29.07.2009, RICHARD SOLOMON wrote:
>>
>>
>>> Since the Bird Silicone Oil is a tad pricey ($142/gal), can anyone
>>>
>>> recommend a substitute for re-filling a Bird Dummy Load ?
>>>
>>>
>>>
>>> Thanks, Dick, W1KSZ
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>>>
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>>
>
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