Don't ever throw that catalog out... If it was
worth your time, I'd pay you for some photocopies
or page scans.
thanks
skipp
> Micheal Salem <[EMAIL PROTECTED]> ,wrote:
> Skip:
>
> I did look it up when I got home in my ancient M/A-COM
> catalog (From 1982, no less. It is hard to throw this stuff
> away).
>
> For those who are interested, the 7R011 is specified
> at 125 watts. The insertion loss is .9 db typical with
> 1.3 db max. The isolation can be as high as 60
> db with 50 db typical. That may require breaking out
> the HP435B and an RF head to tune it. But I could get
> a good null right down to zero indication at 10 watts in
> and a 1 watt Bird element on the output and expected
> that I had at least 40 db or more of isolation. It is
> described as a metro style isolator.
>
> The 44004 load that comes with the typical IM
> panel that includes the 7R011 is rated at 100 watts
> and I would agree with Skipp that it would not be a
> good idea to dump more than 100 watts through the
> device. With 125 watts in and an insertion loss of
> .9 db. there probably isn't more than 100 watts
> in the dummy load, but you could be dissipating
> a lot of power in heat in the isolator in an open
> antenna condition.
>
> Micheal Salem N5MS
> Norman, Oklahoma
>
>
>
> skipp025 wrote:
>
> >>I would have to look it up, but I think that
> >>this isolator takes up to at least 100 watts.
> >>That would be when it is in resonance.
> >>I have run 65 watts through it with not
> >>much trouble.
> >>Micheal Salem
> >>
> >>
> >>
> >
> >The port loads are under sized if you want real
> >protection. The units operate just fine at 100
> >watts fwd power... at least that's what Motorola
> >had been blowing through them for some decades.
> >
> >As long as the antenna system works as it should,
> >the loads are probably ok for lower power levels.
> >
> >But I wouldn't trust the supplied port loads as
> >a failsafe.
> >
> >skipp
> >
> >
> >
> >
> >
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