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Fwd: Re: Expanded band query...?

> --- Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
> wrote:
> >Nope.  All ex-band stations are (supposed to be)
> > non-directional,
> > although I think 1660 Elizabeth applied for, and
> > perhaps has even been
> > granted, a DA.
> > 
> > What's much more likely is that the operators
> > conveniently ``forgot''
> > to reduce power.
> In addition to Elizabeth, I think I have now seen at
> least some other applications, if not grants, for
> variances in x-band stations. One, IIRC, was to use
> less than 1 kW at night. I think another, maybe even
> for a new station, was for a DA for at least one or
> the other of day or night. I might have seen one
> specifying less than 10 kW day. Inevitable, of
> course
> . . .
> On the x-band: It's still easy to get a 1 kW signal
> at
> night from as far as Atlanta. I can still get Miami
> on
> 1700 off and on. Size doesn't matter -- it ain't the
> power in most cases, it's the interfering signals
> that
> usually matter most. But with the band filling up
> the
> most fun now is thanks to us being on the east coast
> -- trying for x-band stations to the west when
> they're
> still at 10kW just before their sunset.
> Also, it was mentioned (Dan Strassberg, I think)
> that
> 1610 has been almost excluded from x-band
> assignments.
> That may be just because it's hard to fit any in and
> provide both the service and the protection that is
> required for x-band stations.
> And, the 1510-1600 part of the band was in at least
> some limited use in the U.S. by broadcast before
> in 1941, I think. (Did the police use some of those
> frequencies way back at some point, in addition to
> the
> 1600s?) Those "experimental" hi-fidelity stations
> were
> in the 1500s -- like the one that became WQXR / WQEW
> in New York and the now-deleted one in Waterbury,
> Conn.I think they were around by sometime in the
> 1935-40 period.
> The big thing NARBA did for this part of the band
> was
> that a bunch of stations that were just regional
> stations with bad groundwave prospects in the high
> 1400s moved up to what suddenly were not only newly
> available channels, but U.S. Class I-B clear
> channels
> -- 1500, 1510, 1520, 1530, 1560. It was like WTOP,
> WKBW, WLAC, etc., won the lottery. I believe this
> sequence of events explains why WLAC has a null to
> protect 1510 in Boston, even though WLAC is the
> dominant station, which has been mentioned here
> before. It was all done as part of the same moving
> to
> a new frequency.
> A lot of those high-band I-B assignments went to
> stations that just happened to be there in the high
> 1400s already and were moved up, or were in the
> 1500s
> as experimental stations (NYC and one of the ones in
> California, I think). Most of it was not done on the
> basis of any factors like providing nighttime
> skywave
> service to certain areas, or older stations
> elsewhere
> on the band that had lost out earlier in getting a
> clear-channel assignment, etc.

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