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- Date: Fri, 20 May 94 04:30:55 PDT
- From: Ham-Space Mailing List and Newsgroup <ham-space@ucsd.edu>
- Errors-To: Ham-Space-Errors@UCSD.Edu
- Reply-To: Ham-Space@UCSD.Edu
- Precedence: Bulk
- Subject: Ham-Space Digest V94 #129
- To: Ham-Space
-
-
- Ham-Space Digest Fri, 20 May 94 Volume 94 : Issue 129
-
- Today's Topics:
- Eggbeater Antenna
- Mars Observer radio frequencies? (2 msgs)
-
- Send Replies or notes for publication to: <Ham-Space@UCSD.Edu>
- Send subscription requests to: <Ham-Space-REQUEST@UCSD.Edu>
- Problems you can't solve otherwise to brian@ucsd.edu.
-
- Archives of past issues of the Ham-Space Digest are available
- (by FTP only) from UCSD.Edu in directory "mailarchives/ham-space".
-
- We trust that readers are intelligent enough to realize that all text
- herein consists of personal comments and does not represent the official
- policies or positions of any party. Your mileage may vary. So there.
- ----------------------------------------------------------------------
-
- Date: Wed, 18 May 1994 18:26:46 GMT
- From: ihnp4.ucsd.edu!news.acns.nwu.edu!news.eecs.nwu.edu!psuvax1!news.pop.psu.edu!news.cac.psu.edu!howland.reston.ans.net!torn!nott!cunews!freenet.carleton.ca!FreeNet.Carleton.CA!ae517@@.
- Subject: Eggbeater Antenna
- To: ham-space@ucsd.edu
-
- There was a chap on this newsgroup about a month or so back who was
- inquiring as to the construction of the Eggbeater antenna. Just for his
- info, there is a short article in the May CQ magazine on page 29 that
- gives some detail.
-
- Apparently, the two perpendicur loops are fed in the same manner as a
- turnstile antenna, ie 90 degrees out of phase. The author describes this
- as being close to isotropic in radiation pattern in free space.
-
- I was under the impression, perhaps mistakenly, that a single loop had very
- little radiation parallel to the plane of the loop, c'est a dire, all the
- radiation was broadside to the loop. Could one of you antenna design
- mavens explain why is it that when two perpendicular loops are fed 90 degrees
- out of phase, it becomes an isotropic antenna.
-
- As well, what numbers would one plug into Mininec to model this getup?
-
- Russ Renaud
- va3rr/aa8lu
- va3rr@amsat.org
- --
-
- ------------------------------
-
- Date: 19 May 1994 02:00:36 GMT
- From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!howland.reston.ans.net!usc!elroy.jpl.nasa.gov!netline-fddi.jpl.nasa.gov!sookit!rspear@network.ucsd.edu
- Subject: Mars Observer radio frequencies?
- To: ham-space@ucsd.edu
-
- Greg (laborde@elm.jpl.nasa.gov) wrote:
- : In article <Cq0F1G.9MD@koko.csustan.edu> Dave Jacob,
- : jacob@altair.csustan.edu writes:
- : >with ham gear? It seems top me that wh hams are in a unique
- : >position to prove once and for all if this machine is still
- : >working or not.
-
- : Maybe. JPL's Deep Space Network used 70m dish antennas to listen for MO.
- : What kind of antenna do you have?
-
- : -Greg
-
- greg -
-
- the frequencies being looked for are vhf . . . they are tones that were
- meant to be used for vlbi. a proposal here at jpl suggested that a yagi
- antenna be mounted to the 70 meter dish (focused on the dish) to try to
- pick up the signals . . . some engineers have snickered at the idea . . . i
- doubt if any amateur would be able to receive the signals.
-
- regards, richard kd6lwd
-
- rspear@sookit.jpl.nasa.gov
- all disclaimers apply
-
- ------------------------------
-
- Date: 18 May 1994 22:53:11 GMT
- From: ihnp4.ucsd.edu!ucsnews!sol.ctr.columbia.edu!howland.reston.ans.net!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!hyperion.jpl.nasa.gov!laborde@network.ucsd.edu
- Subject: Mars Observer radio frequencies?
- To: ham-space@ucsd.edu
-
- In article <Cq0F1G.9MD@koko.csustan.edu> Dave Jacob,
- jacob@altair.csustan.edu writes:
- >with ham gear? It seems top me that wh hams are in a unique
- >position to prove once and for all if this machine is still
- >working or not.
-
- Maybe. JPL's Deep Space Network used 70m dish antennas to listen for MO.
- What kind of antenna do you have?
-
- -Greg
-
- ------------------------------
-
- End of Ham-Space Digest V94 #129
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-