[Milsurplus] info on DA-515/U?

[J Forster]

Try CALLING the engineering dept. of Bird. Don't email them. If you get to
the real guy, they are very helpful, including with internal parts.

Best,
-John

============

sdaitch at KUW.IBB.GOV wrote:

> Eugene,
>
> I just checked the instruction book for
> the Bird Series 8000 Termaline Coaxial
> Load Resistor, dummyloads, and the only
> thing Bird mentions in this 1992 publication
> about operation above rated power is:
>
> "Caution - Do not operate these loads continuously
> above their ratd maximum wattage power range.  Load
> failure will result"
>
> and
>
> "These units will sustain an input moderately greater than
> their maximum rated per for short periods of time.  Such
> loading must be spaced at reasonable intervals to allow
> sufficient time for cooling to a safe temperature.  Apply
> the excessive power for a few minutes at most and allow
> at least a half hour for adequate cooling before reapplying
> power.  Because of the excessive heat generated by
> overloading, touch the load with caution to avoid painful
> burns."
>
> Sorry, but this isa ll I could easily find.
>
> 73
> Sheldon
>
> ----- Original Message -----
> From: eugene at hertzmail.com
> Date: Sunday, June 22, 2008 2:42 am
> Subject: [Milsurplus] info on DA-515/U?
>
> >
> > I picked up a DA-515/U Dummy Load at a hamfest. I understand it's
> > ratedfor 600W continuous, but does anyone know the specs for how
> > long I can
> > run 1KW? I am looking for the duty cycle (you know, 2 minutes on, 10
> > minutes off, etc).
> >
> > Is there a published rating curve for this? I believe it is equivalent
> > to the Bird 8400 series. I could not find the rating curve on bird's
> > website. I did find the manual, but it only mentions 600W
> > continuous. I
> > tried to contact bird a month ago but no luck.
> >
> > Anyone?
> > Thanks!
> > Eugene