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- Date: Sat, 19 Feb 94 04:31:15 PST
- 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 #34
- To: Ham-Space
-
-
- Ham-Space Digest Sat, 19 Feb 94 Volume 94 : Issue 34
-
- Today's Topics:
- * SpaceNews 21-Feb-94 *
- EOSS Balloon Flight In Denver
- It's Official: GPS Anti-spoofing Is Now on Continuously
- ORBS$049.2L.AMSAT
- WANTED: Circuit to switch out preamp on transmit
-
- 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: Fri, 18 Feb 1994 12:18:05 MST
- From: agate!howland.reston.ans.net!sol.ctr.columbia.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@ames.arpa
- Subject: * SpaceNews 21-Feb-94 *
- To: ham-space@ucsd.edu
-
- SB NEWS @ AMSAT $SPC0221
- * SpaceNews 21-Feb-94 *
-
- BID: $SPC0221
-
-
- =========
- SpaceNews
- =========
-
-
- MONDAY FEBRUARY 21, 1994
-
-
- SpaceNews originates at KD2BD in Wall Township, New Jersey, USA. It is
- published every week and is made available for unlimited distribution.
-
-
- * OSCAR SKN BEST FISTS *
- ========================
- Many thanks to all who participated in our 22nd Annual Straight Key Night
- on OSCAR, 1 January 1994. The following "Best Fist" nominations have been
- received: W1NU, WQ3Y and W6HDO. Although we didn't ask that logs be
- submitted, several participants also reported working AMSAT-NA's esteemed
- president, W3XO/5, in one of Bill's rare appearances on CW (PVRC members
- especially will appreciate the significance of this occasion). An
- "honorary" Best Fist nomination goes to you, Bill; let's hope that more SSB
- ops will follow your fine example, dust off their old pump handles, and
- enjoy the fun.
-
- See you all next year!
-
- [Info via Ray, W2RS]
-
-
- * STS-62 PRE-LAUNCH ORBITAL DAT
- ==================================
- STS-62
- 1 00062U 94062.63664409 .00073440 00000-0 22129-3 0 29
- 2 00062 39.0115 247.8629 0006644 298.2691 61.7477 15.90695888 27
-
- Satellite: STS-62
- Catalog number: 00062
- Epoch time: 94062.63664409 = (03 MAR 94 15:16:46.05 UTC)
- Element set: 002
- Inclination: 39.0115 deg
- RA of node: 247.8629 deg Space Shuttle Flight STS-62
- Eccentricity: .0006644 Prelaunch Element set JSC-002
- Arg of perigee: 298.2691 deg Launch: 03 MAR 94 13:54 UTC
- Mean anomaly: 61.7477 deg
- Mean motion: 15.90695888 rev/day G. L. Carman
- Decay rate: 7.3440e-04 rev/day^2 NASA Johnson Space Center
- Epoch rev: 2
- Checksum: 310
-
- [Info via Gil Carman]
-
-
- * OSCAR-13 ZRO TEST SKED *
- ==========================
- The ZRO Memorial Technical Achievement Award Program, or just "ZRO Test"
- has a new schedule for February and March, 1994, via AMSAT-OSCAR-13. This
- activity is a test of operating skill and equipment performance.
-
- During a typical ZRO run, a control station will send numeric code groups
- using CW at 10 words-per-minute. At the beginning of the run, uplink power
- from the control station is set to match the general beacon downlink
- strength. This is level "zero". The control operator will send and repeat
- a random five-digit number, then lower his uplink power by 3 dB (half power)
- and repeat the procedure with a new random number (level "1"). This will
- continue to a level 30 dB below the beacon (level "A").
-
- A participating listener monitors the downlink signals till he can no longer
- copy the numbers. Those who can hear the beacon will qualify for the basic
- award by copying the code group heard at level "zero". The challenge is to
- improve home-station performance to a point where the lower-level downlink
- signals can be copied (levels 6 through A). To date, only one station
- (Darrel Emerson, AA7FV) has successfully copied level "A".
-
- The following schedule of Mode "B" tests were chosen for convenient
- operating times and favorable squint angles. The tests can be heard on
- 145.840 MHz. Andy WA5ZIB will conduct all the tests. Mode "JL" tests will
- no longer occur due to the failure of AO-13's 70-cm transmitter.
-
- Day Date (UTC) Time Areas covered
-
- Sunday Feb. 20, 1994 0330 UTC NA, NW SA, Japan, Pacific
- Saturday Feb. 26, 1994 1930 UTC NA, SA, Europe, Africa, ME
- Saturday Mar. 19, 1994 1930 UTC NA, SA, Europe, Africa
- Saturday Mar. 26, 1994 2315 UTC NA, SA
-
- Note that the dates and days are shown in "UTC", thus the first test listed
- occurs at 9:30 PM CST
- announced as soon as possible via the AMSAT HF and AO-13 Operations Nets.
-
- All listener reports with date of test and numbers copied should be sent to
- Andy MacAllister WA5ZIB, AMSAT V.P. User Operations, 14714 Knights Way Drive,
- Houston, TX 77083-5640. A report will be returned verifying the level of
- accurate reception. An S.A.S.E. is appreciated but not required.
-
- Information about the AMSAT Awards Program can be found on page 197 of the
- "Proceedings of the AMSAT-NA Tenth Space Symposium" (1992). This paper,
- covering all the AMSAT-NA awards including specifics on the ZRO Test, was
- reprinted on page 10 in the March/April 1993 issue of "The AMSAT Journal".
- The ZRO Test information provided in the article covers test procedures,
- means for obtaining certificates and gives some historical background
- about the program. Reprints of the article can be obtained for an S.A.S.E.
- to WA5ZIB at the address above.
-
- [Info via WA5ZIB]
-
-
- * DISCOVERY-MIR RADIO LINK *
- ============================
- The Space Shuttle Discovery's crew and the MIR Russian space station made an
- Amateur Radio contact on 08-Feb-94 during a period of time when Discovery
- was over the south Pacific and MIR was over the Caribbean.
-
- "We fly during a lot of time with Sergej and I wish a good work with his
- North American collegues, and a not problems return to the Earth", said
- Valery Polyakov one of the MIR cosmonauts. "Thanks, I heard you perfect",
- replied Krikalev in Russian.
-
- [Info via Gustavo, LW2DTZ of AMSAT-LU]
-
-
- * AMSAT HF PBBS *
- =================
- WT0N-3 in St. Paul, MN, USA will be on 10.127 LSB (30 meters) Monday
- through Saturday from 1600 UTC until 23OO UTC. This station will carry
- all AMSAT bulletins and Keps. It will also carry other satellite related
- items such as "SpaceNews". This PBBS will be set up on 300 baud HF packet,
- but will also be available for AMT
- to do so. At this time, the PBBS will be set up as an experiment and any
- comments and suggestions should be directed to the sysop, BJ Arts, WT0N, at
- any one of the following addresses:
-
- PACKET: WT0N@WB0GDB.#STP.MN.USA.NOAM
- INTERNET: BJARTS@STTHOMAS.EDU
-
- [Info via WT0N]
-
-
- * FO-20 SCHEDULE *
- ==================
- The FO-20 command station announced that a slight malfunction in the onboard
- command system had been detected. As a result, analog mode operation
- arranged from 09-Feb-94 will be performed on schedule, but there is a
- possibility of interruption due to satellite ground station control.
-
- The present schedule is as announced before:
-
- Analog mode:
- 09-Feb-94 07:15 -to- 16-Feb-94 07:40 UTC
- 23-Feb-94 08:05 -to- 02-Mar-94 06:40 UTC
- 09-Mar-94 07:05 -to- 16-Mar-94 07:30 UTC
- 23-Mar-94 07:52 -to- 30-Mar-94 08:15 UTC
-
- Digital mode: Unless otherwise noted above.
-
- [Info via Kazu Sakamoto, JJ1WTK]
-
-
- * THANKS! *
- ===========
- Thanks to all those who sent QSL cards, letters, and messages of
- appreciation regarding SpaceNews, especially:
-
- N2WPW EA4RCT VK4STS G7MJL XX9AS KY0R
-
-
- * FEEDBACK/INPUT WELCOMED *
- ===========================
- Mail to SpaceNews should be directed to the editor (John, KD2BD) via any
- of the following paths:
-
- FAX : 1-908-747-7107
- PACKET : KD2BD @ N2KZH.NJ.USA.NA
- INTERNET : kd2bd@ka2qhd.ocpt.ccur.com -or- kd2bd@amsat.org
-
- MAIL : John A. Magliacane, KD2BD
- Department of Engineering and Technology
- Advanced Technology Center
- Brookdale Community College
- Lincroft, New Jersey 07738
- U.S.A.
-
-
- <<=- SpaceNews: The first amateur newsletter read in space! -=>>
-
- /EX
-
- --
- John A. Magliacane, KD2BD * /\/\ * Voice : 1-908-224-2948
- Advanced Technology Center |/\/\/\| Packet : KD2BD @ N2KZH.NJ.USA.NA
- Brookdale Community College |\/\/\/| Internet: kd2bd@ka2qhd.ocpt.ccur.com
- Lincroft, NJ 07738 * \/\/ * Morse : -.- -.. ..--- -... -..
-
- ------------------------------
-
- Date: Fri, 18 Feb 1994 22:37:50 GMT
- From: cns!rickvg@uunet.uu.net
- Subject: EOSS Balloon Flight In Denver
- To: ham-space@ucsd.edu
-
- For Followups to this post check the newsgroup rec.radio.amateur.space
-
- Edge of Space Sciences, Inc. (EOSS) is a non-profit organization
- comprised of individuals interested in the use of high altitude balloon
- flights to offer an experimental platform for students and other
- experimenters. The group has a very high level of participation by
- amateur radio operators, however, this is NOT a requirement for
- membership and participation.
-
- EOSS has flown 14 successful flights over the past few years. We
- regularly fly amateur television, and a suite of atmospheric sensors.
-
- Other experimental payloads have included, GPS and LORAN-C for a
- comparison of their accuracy. Homebrew differential GPS on the same
- flight. Students of Coloraro University at Boulder (CU) created their
- own differential system using a gps receiver at a KNOWN location, and
- calculated the offsets themselves, allowing the GPS vs. LORAN-C
- comparison greater accuracy.
-
- EOSS hosted last year's "National Balloon Symposium" in Denver Colorado.
- People from more than 10 states, and Canada were in attendance as well
- as some of the commercial providers of equipment used in our "hobby".
-
- We plan to fly EOSS-15 soon and here is our general information release
- about this flight. If you have any questions about the flight or EOSS
- please use email to my address (sig file at bottom).
-
- EOSS-15 FLIGHT PROFILE
-
- LAUNCH SITE:
- Thunder Ridge Middle School
- Picadilly and Smokey Hill Rd.
- Aurora, Colorado, USA
-
- latitude 39.61195 deg North
- longitude 104.75050 deg West
-
- (The lat/lon is actually for a location within 1 mile of launch point. I
- haven't been to the launch site to take an accruate fix yet.)
-
- LAUNCH DATE: February 26,1994
-
- LAUNCH TIME: 1600 UTC (Set up 1400 UTC) Launch time subject to FAA approval
-
- ON-BOARD EXPERIMENT: Conducted by Cherry Creek High School.
-
- PURPOSE: To measure the various levels of alpha, beta, and gamma radiation at
- various altitudes.
-
- SHUTTLE FREQUENCIES:
- Packet: 144.340
- ATV: 426.250
- CW Beacon: 147.555
- Carries the call of WB4ETT
-
- There will be a HF net run by Sparky\ KA0DPC on 7.232 MHz (phone). And the
- FOXHUNTER'S will coordinate on the Colorado Repeater Association's repeater
- 147.225 MHz (+600kHz). This will also be used for some local information
- during the flight. Thanks in advance to the Colorado Repeater Association
- for the use of their repeater.
-
- REMARKS: Edge of Space Sciences will provide the platform for Cherry
- Creek High School and Thunder Ridge Middle School to study the lower
- atmosphere. Cherry Creek H.S. students have modified a geiger counter
- to meet the EOSS interface specifications which will measure the alpha,
- beta, and gamma levels of radiation vs. altitude. The experiment will
- gather data that should interest local NASA and NOAA officials.
-
- Thunder Ridge M.S. students will make graphs that will help them
- understand the temperature vs. altitude and balloon dynamics by
- graphing the ascent and descent rate of the balloon.
-
- The project will be presented at this years Denver, News 4 Education
- Exposition at the Colorado Convention Center on March 11,12,13 1994.
- More information about the EXPO can be obtained from EOSS.
-
- Sponsorship for this flight and Education Exposition have been provided by:
-
- Olde Antenna Lab
- Dave Clingerman (W6OAL)
- 4725 W. Quincy
- Num 1014
- Denver, CO 80236
- 303-798-5926
- 303-498-3820
-
- for his:
- 70 cm ATV Candelabra Antenna
- GPS Wheel Antenna
- Financial support in Sponsoring EOSS at the KCNC Expo
-
-
- AT&T
- for their:
- Financial support in Sponsoring EOSS at the KCNC Expo
-
-
- SUBMITTED on packet BY: Brian Thomas\N0VSA ground station co-lead
- N0VSA@W0GVT.#NECO.CO.USA.NOAM
-
-
- relayed to internet by:
-
- Rick von Glahn
- rickvg@cscns.com -- Internet (preferred)
- 74620,637 -- Compuserve
- N0KKZ@W0GVT.#NECO.CO.USA -- packet radio
-
- ------------------------------
-
- Date: 18 Feb 1994 11:14:55 GMT
- From: swrinde!cs.utexas.edu!howland.reston.ans.net!news.intercon.com!news.pipeline.com!malgudi.oar.net!news.ysu.edu!yfn.ysu.edu!ae674@network.ucsd.edu
- Subject: It's Official: GPS Anti-spoofing Is Now on Continuously
- To: ham-space@ucsd.edu
-
- :Anti spoofing is a system that degrades the GPS fixes of systems that
- :are not using the classified military codes for accurate, dynamic
- :navigation. i.e. to prevent anyone from using GPS as a means
- :of guiding weapons or aiming them.
- :Presumably 100 m is greater than the blast radius of a terrorist
- :bomb!
-
- I presume this randomizes the timing signals that are sent and received...
- I was under the impression that this had been implemented a while ago.
- Or is "anti spoofing" a more secure encryption scheme for the military coded signals?
- Having yet to get my hands on a GPS unit, what kind of resolution do the commercial
- units offer and what was there accuracy before the "anti spoofing"/signal jitter
- system went into effect?
-
- ------------------------------
-
- Date: Fri, 18 Feb 1994 06:43:00 MST
- From: agate!howland.reston.ans.net!sol.ctr.columbia.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@ames.arpa
- Subject: ORBS$049.2L.AMSAT
- To: ham-space@ucsd.edu
-
- SB KEPS @ AMSAT $ORBS-049.N
- 2Line Orbital Elements 049.AMSAT
-
- HR AMSAT ORBITAL ELEMENTS FOR AMATEUR SAT
- FROM WA5QGD FORT WORTH,TX February 18, 1994
- BID: $ORBS-049.N
-
- DECODE 2-LINE ELSETS WIT
- 1 AAAAAU 00 0 0 BBBBB.BBBBBBBB .CCCCCCCC 00000-0 00000-0 0 DDDZ
- 2 AAAAA EEE.EEEE FFF.FFFF GGGGGGG HHH.HHHH III.IIII JJ.JJJJJJJJKKKKKZ
- KEY: A-CATALOGNUM B-EPOCHTIME C-DECAY D-ELSETNUM E-INCLINATION F-RAAN
- G-ECCENTRICITY H-ARGPERIGEE I-MNANOM J-MNMOTION K-ORBITNUM Z-CHECKSUM
-
- TO ALL RADIO AMATEURS BT
-
- AO-10
- 1 14129U 83058B 94041.03785160 -.00000138 00000-0 10000-3 0 2618
- 2 14129 27.2065 342.3641 6022608 153.3557 257.8051 2.05878353 80161
- UO-11
- 1 14781U 84021B 94044.54889300 .00000363 00000-0 69607-4 0 6647
- 2 14781 97.7907 65.0254 0011279 310.7761 49.2455 14.69144313532150
- RS-10/11
- 1 18129U 87054 A 94047.04020088 .00000024 00000-0 26346-4 0 8632
- 2 18129 082.9204 058.3872 0011757 005.5029 354.6799 13.72331248333290
- AO-13
- 1 19216U 88051 B 94046.66135778 .00002242 00000-0 12555 0 0 8791
- 2 19216 057.8129 267.9831 7205073 334.9717 002.9154 02.09729204 43460
- FO-20
- 1 20480U 90013C 94046.42832899 -.00000014 00000-0 49346-4 0 6594
- 2 20480 99.0216 221.3367 0539917 255.4010 98.6634 12.83223845188515
- AO-21
- 1 21087U 91006A 94044.50409244 .00000094 00000-0 82657-4 0 4241
- 2 21087 82.9374 234.2226 0036823 68.1133 292.3931 13.74534088152592
- RS-12/13
- 1 21089U 91007A 94044.66379265 .00000043 00000-0 29527-4 0 6625
- 2 21089 82.9220 103.0678 0030946 91.8517 268.6203 13.74034946151682
- ARSENE
- 1 22654U 93031B 93338.80803910 -.00000087 00000-0 00000 0 0 2437
- 2 22654 1.4104 113.5274 2936576 161.9838 210.8642 1.42202044 2990
- UO-14
- 1 20437U 90005B 94046.18347456 .00000060 00000-0 40471-4 0 9649
- 2 20437 98.5953 132.5942 0010599 186.2827 173.8225 14.29823413212157
- AO-16
- 1 20439U 90005D 94045.75388848 .00000076 00000-0 46533-4 0 7643
- 2 20439 98.6038 133.2765 0010934 188.0238 172.0765 14.29879034212109
- DO-17
- 1 20440U 90005E 94045.23034447 .00000070 00000-0 44132-4 0 7637
- 2 20440 98.6058 133.0443 0010965 189.4352 170.6623 14.30017107212047
- WO-18
- 1 20441U 90005F 94045.76328214 .00000059 00000-0 39826-4 0 7657
- 2 20441 98.6054 133.5798 0011505 188.3662 171.7330 14.29993172212124
- LO-19
- 1 20442U 90005G 94045.74960276 .00000064 00000-0 41740-4 0 7638
- 2 20442 98.6048 133.7927 0011921 187.6862 172.4137 14.30087334212130
- UO-22
- 1 21575U 91050B 94046.13690949 .00000113 00000-0 52716-4 0 4657
- 2 21575 98.4466 123.0432 0007219 301.1937 58.8542 14.36890610135556
- KO-23
- 1 22077U 92052B 94046.40390865 -.00000037 00000-0 10000-3 0 3601
- 2 22077 66.0810 174.9628 0009874 317.5713 42.4539 12.86284764 71129
- AO-27
- 1 22825U 93061C 94046.21545311 .00000058 00000-0 41460-4 0 2617
- 2 22825 98.6626 123.1936 0008062 202.2052 157.8775 14.27607193 20284
- IO-26
- 1 22826U 93061D 94042.21058899 .00000053 00000-0 39268-4 0 2612
- 2 22826 98.6649 119.2441 0008529 216.1988 143.8612 14.27708814 19710
- KO-25
- 1 22830U 93061H 94045.75293537 .00000053 00000-0 38624-4 0 2647
- 2 22830 98.5674 121.3071 0011406 172.0390 188.0975 14.28033386 20227
- NOAA-9
- 1 15427U 84123 A 94048.05740928 .00000108 00000-0 57386-4 0 7177
- 2 15427 099.0629 097.0472 0014834 198.2531 161.8614 14.13588676473374
- NOAA-10
- 1 16969U 86073 A 94048.07887430 .00000192 00000-0 82625-4 0 6151
- 2 16969 098.5086 060.7353 0013148 322.0632 038.0209 14.24865197385508
- MET-2/17
- 1 18820U 88005A 94046.33979358 .00000030 00000-0 12997-4 0 2628
- 2 18820 82.5401 5.5070 0016642 157.5160 202.6730 13.84706663305497
- MET-3/2
- 1 19336U 88064A 94039.99790931 .00000051 00000-0 10000-3 0 2623
- 2 19336 82.5380 54.3969 0015730 222.0779 137.9138 13.16964807266383
- NOAA-11
- 1 19531U 88089 A 94046.98300494 -.00000096 00000-0 00000 0 0 5218
- 2 19531 099.1592 032.9867 0011924 112.3219 247.9779 14.12958217278100
- MET-2/18
- 1 19851U 89018A 94044.55769401 .00000107 00000-0 82803-4 0 2624
- 2 19851 82.5198 242.4732 0011047 225.2162 134.8075 13.84359023250582
- MET-3/3
- 1 20305U 89086A 94046.12070456 .00000044 00000-0 10000-3 0 9878
- 2 20305 82.5552 354.3730 0006056 241.9787 118.0703 13.04413574206986
- MET-2/19
- 1 20670U 90057A 94040.79306496 .00000024 00000-0 79036-5 0 7621
- 2 20670 82.5504 309.6649 0016176 139.0978 221.1403 13.84188455182995
- FY-1/2
- 1 20788U 90081A 94046.23594868 -.00000254 00000-0 -14043-3 0 8921
- 2 20788 98.8422 70.2522 0014658 354.4648 5.6337 14.01322369176623
- MET-2/20
- 1 20826U 90086A 94045.22593445 .00000017 00000-0 15837-5 0 7622
- 2 20826 82.5209 243.8029 0014675 36.2160 323.9979 13.83572388170755
- MET-3/4
- 1 21232U 91030A 94044.59202931 .00000051 00000-0 10000-3 0 6701
- 2 21232 82.5391 256.9674 0013673 130.9218 229.3059 13.16460015135098
- NOAA-12
- 1 21263U 91032A 94039.95700562 .00000136 00000-0 80464-4 0 9196
- 2 21263 98.6320 70.4809 0012014 247.6730 112.3172 14.22366100142301
- MET-3/5
- 1 21655U 91056A 94046.41312719 .00000051 00000-0 10000-3 0 6673
- 2 21655 82.5533 202.7275 0013636 137.2394 222.9769 13.16827457120431
- MET-2/21
- 1 22782U 93055 A 94047.11395079 .00000069 00000-0 63374-4 0 2638
- 2 22782 082.5509 302.3850 0021878 203.9744 156.0899 13.83000458023351
- POSAT
- 1 22829U 93061G 94045.75585944 .00000072 00000-0 46760-4 0 2541
- 2 22829 98.6608 122.7699 0009759 191.0097 169.0872 14.28003980 20229
- MIR
- 1 16609U 86017 A 94048.08346927 .00010503 00000-0 12582-3 0 1406
- 2 16609 051.6194 068.8223 0005218 334.0639 026.0757 15.60261716457315
- HUBBLE
- 1 20580U 90037B 94045.21686181 .00001057 00000-0 90647-4 0 4379
- 2 20580 28.4690 305.8162 0006080 238.3563 121.6440 14.90475490 11020
- GRO
- 1 21225U 91027B 94045.19676059 .00004645 00000-0 10629-3 0 661
- 2 21225 28.4619 5.5021 0003857 262.4247 97.5914 15.40075712 37958
- UARS
- 1 21701U 91063B 94043.59286458 .00004144 00000-0 38419-3 0 4780
- 2 21701 56.9850 298.3343 0004571 105.6879 254.4667 14.96334686132281
- /EX
-
- ------------------------------
-
- Date: Thu, 17 Feb 1994 15:58:21 GMT
- From: ucsnews!sol.ctr.columbia.edu!math.ohio-state.edu!cs.utexas.edu!swrinde!sgiblab!pacbell.com!att-out!cbnewsj!dquaglia@network.ucsd.edu
- Subject: WANTED: Circuit to switch out preamp on transmit
- To: ham-space@ucsd.edu
-
- I'm looking for a circuit that will detect the presence of RF and
- switch out a preamp. I only have a transceiver and I would like to
- put the preamp on the mast, but I know the preamp will get fried unless
- I put some sort of protection on it. I've heard there is a simple
- way to do this with PIN diodes, but I can't find any references to this
- in any of my usual sources. Any help is appreciated.
-
- Replies to dquaglia@cbnewsj.cb.att.com or dquagliana@attmail.com.
-
- Douglas Quagliana KA2UPW
- dquaglia@cbnewsj.cb.att.com
-
- ------------------------------
-
- End of Ham-Space Digest V94 #34
- ******************************
- ******************************
-