I have found only one manufacturer of non-inductive tubular
resistors today; Kanthal Globar. Check out
http://www.globar.com/ec/tubular.php.html , however these are expensive items.
You could also check Surplus Sales of Nebraska at
http://www.surplussales.com/Resistors/NonInductive/Res-NonInd_list.htm
and look for Type C Non-Inductive Resistors. You could be lucky and
find a way to use any of these resistors.
I have a few Bird 8329 (30 dB - 2 kW attenuators) with broken main
resistor sitting on the shelf awaiting repair. The sub resistors in
the items are labeled by Welwyn, however the main resistors are not
marked (or the markings are burned off). I do not think Welwyn make
tubular non-inductive resistors any more. Support staff at Bird does
not want to give away any information about or supply these
resistors, they only tell us to return the RF Section Assebly for
service so I don't expect You getting any information from Bird.
regards,
Per
LA9XKA
At 12:28 11.11.2007, Keith Schreiber wrote:
>I'm looking for info and leads on purchasing a replacement resistor,
>for a Bird oil-filled load. Bird tells me they no longer have parts
>for, nor support "this obsolete load" which I believe is from the
>1960s. The model number on mine is 888 and is similar to models
>6835, 8813, 8832. The sticker on the front says 1200W continuous -
>1500W for 1/2 hour.
>
>A possible resistor part number is 3510-026-2 (this info from
>another ham.) The resistor is exactly 12 inches long X 7/8ths
>OD. It is hollow. The ID is 5/8ths inch, making the walls 1/8th
>inch thick. It has a 5/8th inch copper band at each end for
>connection. It's white ceramic, with a black film element. (If you
>think you have one for sale, I can e-mail you a picture of what's
>left of mine.)
>
>Do you have one of these lying in a drawer somewhere, or know where
>I might find one? Or perhaps a resistor from some other vendor that
>might work? One more question: Does anybody know what that
>incredibly foul-smelling, dark colored coolant in these loads
>is? Strange properties - thin like water but freezes above 32 F ????
>
>Thanks for any leads or info & 73
>Keith W8KTH
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