f119075b
XPost: rec.radio.shortwave
From: detritus@ix.netcom.com
Patrick Turner wrote:
> On Nov 15, 9:31 am, Lord Valve wrote:
> > arthrny...@webtv.net wrote:
> > > On Nov 14, 9:59 am, Lord Valve wrote:
> > > > John Smith wrote:
> > > > > On 11/13/2011 2:19 PM, Lord Valve wrote:
> > > > > > John Smith wrote:
> >
> > > > > >> On 11/13/2011 10:25 AM, Lord Valve wrote:
> > > > > >>> Don Pearce wrote:
> >
> > > > > >>>> On Sun, 13 Nov 2011 08:38:28 -0700, Lord Valve
> > > > > >>>> wrote:
> >
> > > > > >>>>> dave wrote:
> >
> > > > > >>>>>> On Sun, 13 Nov 2011 11:39:03 +0000, Geoffrey S. Mendelson
wrote:
> >
> > > > > >>>>>>>> It is much more important to know exactly how long and how
well your
> > > > > >>>>>>>> satellite is going to work than to hope to get longer by
using a
> > > > > >>>>>>>> technology that might last longer, but will more probably
die
> > > > > >>>>>>>> unexpectedly when struck by a cosmic ray burst.
> >
> > > > > >>>>>>> Sometimes you can not predict how long a satellite will be
used. A
> > > > > >>>>>>> friend of mine worked on a civilian satellite for a defense
contractor
> > > > > >>>>>>> and just before the division was sold off, cleaned out any
old documents
> > > > > >>>>>>> and files they had on it.
> >
> > > > > >>>>>>> Since the satellite he had worked on was way past its
expected life (but
> > > > > >>>>>>> still in use), the contracts had long expired, the work was
not
> > > > > >>>>>>> classified and a new improved one was due to be launched in
a few days,
> > > > > >>>>>>> he was told to dump it all.
> >
> > > > > >>>>>>> A few days later, the booster exploded on the pad, and the
replacement
> > > > > >>>>>>> was destroyed.
> >
> > > > > >>>>>>> The sattelite was kept running for many years, although
there were no
> > > > > >>>>>>> documents on what to do or how it was built.
> >
> > > > > >>>>>>> Geoff.
> >
> > > > > >>>>>> What good is a diagram if the unit is 24,000 miles in the air?
> >
> > > > > >>>>> It had better *not* be in the air... ;-)
> >
> > > > > >>>>> Besides - I saw mention upthread of using the ambient
> > > > > >>>>> vacuum with just the tube elements, rather than a typical
> > > > > >>>>> evacuated glass (or other material) enclosure...is the
> > > > > >>>>> vacuum in geosynchronous orbit really hard enough?
> > > > > >>>>> It would seem to me that there are probably plenty of
> > > > > >>>>> gas molecules floating around at that height, even if
> > > > > >>>>> it would still qualify as a "soft" vacuum. Anybody?
> >
> > > > > >>>>> Lord Valve
> >
> > > > > >>>> For all sorts of other reasons, standard enclosed tubes are
used. Main
> > > > > >>>> reasons are first to contain the electrons so other metalwork
doesn't
> > > > > >>>> get involved, and second to maintain the correct physical
positioning.
> > > > > >>>> The helix is of very fine tolerance in both pitch and
positioning.
> > > > > >>>> Space is certainly hard enough, but the environment around a
satellite
> > > > > >>>> is frequently not space, but a diffuse cloud of exhaust gas
which
> > > > > >>>> would extinguish a TWT immediately.
> >
> > > > > >>>> d
> >
> > > > > >>> Ah. Good point!
> >
> > > > > >>> Satellites do indeed need to use propellant of some sort
> > > > > >>> to keep in position; I didn't think of that at all. And it
> > > > > >>> would seem that even if the ambient vacuum were
> > > > > >>> hard enough, conventional construction of the TWT
> > > > > >>> would be needed to keep contaminants out of it during
> > > > > >>> the satellite assembly process down on Terra firma.
> > > > > >>> But I must admit, the idea of using ambient vacuum
> > > > > >>> tickles my fancy a bit. ;-)
> >
> > > > > >>> Lord Valve
> >
> > > > > >> I don't recall anyone ever claiming there was no enclose on the
devices
> > > > > >> ... just the reasons for enclosing them the way we do on earth is
now
> > > > > >> gone ...
> >
> > > > > >> Regards,
> > > > > >> JS
> >
> > > > > > Do you actually read this shit, or have you been into the medicine
cabinet?
> >
> > > > > > Lord Valve
> > > > > >
> >
> > > > > I usually don't read imbecilic stuff ... such as yours. But, if I
do, I
> > > > > certainly do not take it seriously ... perhaps you will have better
luck
> > > > > with others.
> >
> > > > > Regards,
> > > > > JS
> >
> > > > Oh.
> >
> > > > So, you're just another garden-variety cunt.
> > > > Y'all have a Real Nice Day now, y'heah?
> >
> > > > Got guns?
> >
> > > > Lord Valve
> > > > American - so far- Hide quoted text -
> >
> > > > - Show quoted text -
> >
> > > John Smith confessed once that he sleeps with a side arm under his
> > > pillow!
> >
> > He can't keep it on the nightstand like everyone else?
> >
> > You don't want a pistol in the sack with you...you
> > might blow your balls off by accident. Although, in
> > his case...
> >
> > Got guns?
> >
> > Lord Valve
> > American - so far- Hide quoted text -
> >
> > - Show quoted text -
>
> I'll prempt the probability that LV will call me a cunt and say to
> all, respectfully as any gentleman can, that when I am a cunt, I know
> it, and so LV needn't tell me about it.
>
> Is LV getting WORSE as he's gettin older? wer'e into about 3 posts
> from him with the firstie dissing JS for imbecilic reasons, during a
> detailed discussion regarding 10,993.5 ways of building a radio and
> including side issues of tubes used in satellites. Innocent stuff. And
> who'd have guessed so many would have sprung from the woodwork to
> discuss tubey radio thingies when most ppl here thought only 3 people
> read r.a.t most days?
> Anyway, then after such brevity from LV, we get stuff about guns, and
> being American. I reckon LV is frightened witless about the world
> outside himself.
> I invite him to calm down, nobody is about to force him to be un-
> american, and probably nobody would find it interesting to do a home
> invasion at LV's house. Surely both activities would be boring, no?
> Fat lotta good it does to have a shooter under the pillow when ya
> snoring ya head off while someone steps out the window with the family
> silver. Well, plasma TV set maybe.
> But lemme tell ya, one does sure wake up fast when ya reach fo the gun
> while half asleep and ya shoot ya fucking dick off. Dozen madder;
> being dickless at 60 yo probably improves a man. But such an event
> does has ya thinkin fast about a doctor - fuck the TV set, let 'em
> have the darn thang.
>
> Funny thing, I never had no need to ever even consider gettin a gun.
> Jus' no need. There's no need for a front fence, and no need for any
> dog. There used ta be a shiela livin 5 doors away down my street who
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