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- Date: Fri, 29 Oct 93 15:29:35 PDT
- From: Info-Hams Mailing List and Newsgroup <info-hams@ucsd.edu>
- Errors-To: Info-Hams-Errors@UCSD.Edu
- Reply-To: Info-Hams@UCSD.Edu
- Precedence: Bulk
- Subject: Info-Hams Digest V93 #1284
- To: Info-Hams
-
-
- Info-Hams Digest Fri, 29 Oct 93 Volume 93 : Issue 1284
-
- Today's Topics:
- * SpaceNews 01-Nov-93 *
- Andy Z moves on...
- FT-990 Comments
- Full Duplex Kids' HT's
- New in San Francisco
- Questions regarding CTCSS, DTMF ???
- Slowpokes
- Spread Spectrum (2 msgs)
- Studying in San Francisco
- TenTec Century 22
-
- Send Replies or notes for publication to: <Info-Hams@UCSD.Edu>
- Send subscription requests to: <Info-Hams-REQUEST@UCSD.Edu>
- Problems you can't solve otherwise to brian@ucsd.edu.
-
- Archives of past issues of the Info-Hams Digest are available
- (by FTP only) from UCSD.Edu in directory "mailarchives/info-hams".
-
- 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: 29 Oct 93 16:33:12 GMT
- From: news-mail-gateway@ucsd.edu
- Subject: * SpaceNews 01-Nov-93 *
- To: info-hams@ucsd.edu
-
- SB NEWS @ AMSAT $SPC1101
- * SpaceNews 01-Nov-93 *
-
- BID: $SPC1101
-
-
- =========
- SpaceNews
- =========
-
-
- MONDAY NOVEMBER 1, 1993
-
-
- SpaceNews originates at KD2BD in Wall Township, New Jersey, USA. It is
- published every week and is made available for unlimited distribution.
-
-
- * STS-58 SAREX NEWS *
- =====================
- The latest in a series of Shuttle Amateur Radio Experiments carried onboard
- Space Shuttle "Columbia" has been a great success. The Shuttle astronauts
- managed to make scheduled radio contacts with school groups as well as
- general contacts with amateur radio operators around the world.
-
- The following packet beacon was sent by Space Shuttle "Columbia" on
- 25-Oct-93 at 15:14:03 UTC and received by N2NRD:
-
- Thanks for all the great QSO's. KC5AXA, KC5CKM, and I love them.
- We're half way through the mission, beginning flight day 8 today.
- We are doing human metabolic and cardiovascular experiments in the lab today.
- We will also continue with an experiment to quantify the impact human
- activity in a space ship on the microgravity environment.
- We have had spectacular views of our beautiful home planet.
- We hope to bring back a large quantity of pictures.
- 73
- KC5ACR
-
-
- * MIR OPERATING HINTS *
- =======================
- This week: Digipeating through MIR
-
- As some have discovered, it is possible to digipeat though the MIR packet
- station and use it to connect to other packet stations hundreds of miles
- away. Unfortunately, the data throughput is pitifully small. WF1F in
- Billerica, Massachusettes ran a test with Joe WA2GSY in New Jersey. Both
- stations ran 20 foot 2-meter Yagis with an ERP of approximately 1200 watts.
- Late one weekday evening, both stations were fortunate enough to find the
- MIR PBBS with no users on frequency. This is an extremely rare condition.
- Both stations attempted to directly connect to each other using MIR as a
- digipeater, and were successful. Every line of text that was sent to each
- other made it through without error. However, because of retries,
- acknowledgments, and other packet related overhead, the 120 character per
- second transmissions were reduced to approximately 1 character for every
- 2.5 seconds.
-
- The following short message took 4 minutes and 37 seconds to transfer through
- Mir, and required over 132 packet transmissions. There were probably many
- more transmissions, but the equipment was not set up to count any packet
- collisions at either end.
-
- CONNECTED to WA2GSY VIA R2MIR [04/18/93 00:25:00]
- WA2GSY>:PLEASE CONNECT TO WA2GSY-1 FOR MY PMS
- WA2GSY>:Hi miles
- WF1F>:HI JOE GOT YOU
- WA2GSY>:How are you
- WA2GSY>:Glad to see you on
- WA2GSY>:Whats up
- WA2GSY>:Sure is happy to hear you
- WF1F>LETS TRY OSCAR 13 OR SSB
- WA2GSY>:Did you get the equip fixed
- WA2GSY>:*** DISCONNECTED [04/18/93 00:29:37]
-
- Now for the statistics:
-
- Packets from WF1F to WA2GSY through MIR: 31
- Packets from WA2GSY to WF1F through MIR: 35
-
- Total time 4:37
- Total characters sent by WF1F: 39
- Total characters sent by WA2GSY: 110
-
- Throughput would further be reduced if there were ground stations
- trying to connect to the PBBS on MIR while other stations used MIR for
- digipeating purposes. The bottom line is that digipeating through MIR is
- NOT recommended while others are actively connected to the MIR PBBS.
- Even under ideal conditions with high ERP, it is not possible to get much
- data though MIR acting as a digipeater.
-
- Remember, only 1 station can connect to MIR's PBBS at a time. All others
- must wait.
-
- G. Miles Mann
- WF1F @ K1UGM.MA
- mann@pictel.com
-
- [Story by G. Miles Mann, WF1F]
-
-
- * ITAMSAT-OSCAR-26 NEWS *
- =========================
- Sunday October 24th 1993 marked a very important day for ITAMSAT-OSCAR 26.
- After 28 days in orbit, IO-26 BBS was up and running, and has been accessed
- by many amateurs around the world.
-
- The initial reports are very encouraging. Even at this low power setting,
- around 250 mW, the PSK signal is crystal clear and decoding is very easy.
-
- LW2DTZ copied the following beacon frames from the satellite:
-
- ITMSAT-1>TIME-1
- PHT: uptime is 021/04:11:44. Time is Sun Oct 24 13:42:57 1993
-
- ITMSAT-1>AMSAT
- 24 October 1993 - BBS open to users.
- Use standard PB and PG software.
- 73 de ITAMSAT Command Team
-
- Activity on the BBS has just started, but we have already received many
- enthusiatic comments. Ground stations that had accessed the BBS as of
- 24-Oct-93 included: I0LYL (which we thank for his kind words), I6CGE, IK2OYD,
- IK2VOO, IW2EGC, IW4ASO, DL1TV, EA2CLS, OE3EV, ON6UG, WB5FCO and ZS6BMN.
-
- As always, we are waiting for any report from amateurs around the globe!
-
- 73 de ITAMSAT Command Team
-
- [Info via Luca Bertagnolio, IK2OVV]
-
-
- * VE3ONT EME OPERATION NEWS *
- =============================
- The Toronto VHF Society plans to continue its EME (Moonbounce) tests
- using the 46-meter (150') dish at the Algonquin Provincial Park, Ontario.
- Operation will be as follows:
-
- Date VE3ONT Approx.
- (UTC) TX Freq RX Freq time (UTC)
-
- Saturday, Nov. 6 432.050 432.050-060 0405-1645
- Sunday, Nov. 7 1296.050 1296.050-060 0515-1715
-
- The dish can be lowered to about 9 degrees elevation. This decreases
- the operating time by almost an hour at Moon rise and set. It also
- limits the ability to work local horizon-only stations.
-
- Equipment: The 432 MHz setup will be significantly better than October's.
- The receive problem that gave all signals a 120 Hz buzz has been fixed, and
- the antenna will have about 1 dB more antenna gain due to a redesigned feed
- helix.
-
- On 1296, VE6ONT will be running about 150 watts output. The feed will be
- LHCP/RHCP switchable so they ought to be able to work linear and circular
- polarization stations.
-
- VE6ONT anticipates being able to work stations running 50-100 watts to a long
- yagi on 432 or 1296. OSCAR-class stations are especially encouraged to try.
-
- Operating suggestions:
-
- Doppler shift will move the apparent VE3ONT frequency a bit. This will
- make VE3ONT seem to be a little "off frequency," so tune around. Moon echos
- will seem to be somewhat high (in frequency) at Moonrise and low at Moonset.
- We will, however, always transmit on .050.
-
- Note that VE6ONT will be operating "split" so please spread out. In the
- October operation, some stations were frustrated due to calling VE6ONT on
- their own frequency, where they weren't listening. Try to use good split-
- frequency HF DXing technique: listen for the stations that VE3ONT is calling
- and transmit near their frequency when VE3ONT stands by.
-
- Please avoid duplicate QSOs. The goal is to be "first EME" for as many small
- stations as possible. "Calling again to say Hi" hurts small stations'
- chances of making a QSO.
-
- VE3ONT will be operating in "contest" mode. They discovered last month that
- sequenced operation was not fruitful. They will make every effort to work
- small and horizon-only stations but will not accept skeds.
-
- HF Liaison: HF propagation from the park is extremely poor. VE6ONT will try
- to check in to the 20-meter (14.345) EME Net during the day and the 75-
- meter VHF nets (3.818 & 3.843) at night. Previous attempts to do so were
- not successful, so don't expect much on HF.
-
- QSL information: QSL to VE3ONT ('93 Callbook address ONLY!) or to Dennis
- Mungham (VE3ASO), R.R. 3, Mountain, Ontario, Canada K0E 1S0. Color photo
- QSLs are being prepared.
-
- Michael Owen, W9IP
- MOWE@SLUMUS
- Fax: (315) 379-5804
- Dennis Mungham, VE3ASO
-
- [Info via W9IP]
-
-
- * THANKS! *
- ===========
- Thanks to all those who sent messages of appreciation regarding SpaceNews,
- especially:
-
- G0JJO IW1CXZ N8OAR
-
-
- * 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: 29 Oct 93 19:16:48 GMT
- From: news-mail-gateway@ucsd.edu
- Subject: Andy Z moves on...
- To: info-hams@ucsd.edu
-
- To anyone who cares...
-
- Effective immediately I'm leaving NRL, and thus losing my email access at
- zwirko@wave.nrl.navy.mil
-
- For the near future I can be reached at:
-
- zwirko@w3eax.umd.edu
-
- More to follow...later.
-
- andy
-
- Zwirko@Wave.NRL.Navy.Mil - Vector Research Co. Inc. - 202.767.2493 me
- 202.404.7813 fax
- Naval Research Lab.
- Code 7124
- 4555 Overlook Ave. S.W.
- Washington D.C. 20375-5350
-
- ------------------------------
-
- Date: Thu, 28 Oct 1993 18:36:32 GMT
- From: nntp.ucsb.edu!mustang.mst6.lanl.gov!nntp-server.caltech.edu!elroy.jpl.nasa.gov!ncar!uchinews!att-out!cbfsb!cbnews!bigtop!longs!n2ic@network.ucsd.edu
- Subject: FT-990 Comments
- To: info-hams@ucsd.edu
-
- Now that you have read all the positive comments on the FT-990, here's
- a few negative ones....
-
- Bear in mind that these comments are coming from two avid contesters (myself
- and K0KR). I suspect that contesters are far more demanding of their
- equipment than the average ham.
-
- 1) The SWR/power shutdown circuit is extremely sensitive to amplifier
- switching times. When using the FT-990 with my Alpha 76PA, the Alpha is
- relatively slow to switch into transmit (100 msec or so ?). During the
- switching interval, the FT-990 senses a high SWR, and reduces the power
- to about 50 watts. It takes about 3 seconds for the FT-990 to come up
- to full output. This does not happen using my Alpha with a TS-940,
- TS-850 or TS-950, nor does it happen using the FT-990 with a SB-220.
-
- 2) The speech processor is relatively useless. You can only get about 3 dB
- of compression before your transmit audio sounds lousy. This has been tried
- with several different microphones.
-
- 3) The receive audio output response is incredibly variable across the
- 300 Hz to 3000 Hz range. I can't understand how those Japanese engineers
- could have screwed up such a simple circuit so badly ! This problem was
- discussed in the QST review, but you have to hear it to believe it.
-
- 4) When used with a beverage antenna for 160 meter reception, RF feedback
- was introduced on transmit, causing the transmitter to lock into transmit,
- putting out an audio feedback "squeel". The only way to fix the problem
- was to ground the receive antenna connector using an external relay while
- transmitting.
-
- 5) When used with a J-com RS-232 to TTL converter, the computer interface
- is susceptable to 10 meter RF and stops functioning for several minutes.
-
-
- The particular FT-990 exhibiting these problems has been returned to Yaesu
- service in California. They were unable to fix any of them. (Yes, Chip
- Margelli was personally involved at Yaesu).
-
- Steve, N2IC/0
-
- ------------------------------
-
- Date: 28 Oct 1993 19:55:29 GMT
- From: mustang.mst6.lanl.gov!nntp-server.caltech.edu!elroy.jpl.nasa.gov!ncar!gatech!howland.reston.ans.net!usenet.ins.cwru.edu!lerc.nasa.gov!news.larc.nasa.gov!grissom.larc.nasa.@nntp.ucsb.edu
- Subject: Full Duplex Kids' HT's
- To: info-hams@ucsd.edu
-
- In article <1993Oct28.185320.17835@mixcom.mixcom.com> kevin.jessup <kevin.jessup@mixcom.mixcom.com> writes:
- >In <199310271641.JAA05378@ucsd.edu> William=E.=Newkirk%Pubs%GenAv.Mlb@ns14.cca.CR.rockwell.COM writes:
- >
- >>i look at the catalog i have just received from Tiger Software. on Page 5
- >>they offer the Sony ICB-1500 "My First Sony Walkie Talkie Set".
- >
- >>Price is $49.90.
- >
- >>Anyone know what's in these? They aren't the typical 49 MHz kids walkie
- >>talkies. the full duplex part is interesting. maybe something convertible to
- >>amateur radio use?
- >
- >The 49 (and 46) MHz band is used by cordless telephones,
- >"baby momitors" and low-power "kiddie-style" walkie talkies and
- >personal communication devices. All in the milliwatt range.
-
- Yup, and right next to it is the 6M amateur radio band. Many of the
- low-power walkie-talkies can easily be converted to 6M operation, and
- with a bit of tinkering to the output stage, many of them will put out
- a substantial amount of power, too. (Note that I consider a watt to be
- pretty substantial).
-
- I've never seen a full-duplex one, though. It might use a single oscillator
- for the transmitter and the LO of the receiver, then rely upon the IF
- frequency to deal with the split. That would be crude (and if it were
- sufficiently crude to receive LO+IF and LO-IF at the same time, you could
- do this easily). If this is the case, you're out of luck. But if they
- use two independant sections, you could probably crystal them up for
- whatever split you want.
- --scott
- --
- "C'est un Nagra. C'est suisse, et tres, tres precis."
-
- ------------------------------
-
- Date: Wed, 27 Oct 1993 14:33:58 GMT
- From: dog.ee.lbl.gov!agate!howland.reston.ans.net!vixen.cso.uiuc.edu!uchinews!att-out!cbfsb!cbnews!cbnewst!cbnewsm!jeffj@network.ucsd.edu
- Subject: New in San Francisco
- To: info-hams@ucsd.edu
-
- In article <msattlerCFFMC0.J0n@netcom.com> msattler@netcom.com (Michael Sattler) writes:
- >Jack Hamilton (jfh@netcom.com) wrote:
- >
- >: The major ham radio club in San Francisco is the San Francisco Amateur
- >: Radio Club. They have a 2-meter repeater on 145.15; antennas are at the VA
-
- The Mt. Diablo Amateur Radio Club (MDARC) meets on the 3rd Friday of
- every month at Our Saviour Lutheran Church on Carol Lane in Lafayette.
- The meetings start around 8:00pm. We have about 540 friendly members and
- all are welcome. We have repeaters on 147.060 (PL100,+), a net that meets
- on Thursdays at 7:30pm followed by the ATV net at 8:00pm. Also there is
- a net on Sunday night at 7:30pm called the Technical net that yours truely
- is net control for. It is on the 147.060 and 147.195 repeaters that are linked
- just for this net so that we will cover the whole San Francisco Bay Area.
- This net is oriented to talking about the technical aspects of Amateur Radio,
- answering any and all questions that have to do with ham radio and any
- thing else that comes up. Good luck on your test and 73!
-
- Jeff
- --
- Jeff Jones AB6MB | OPPOSE THE NORTH AMERICAN FREE TRADE AGREEMENT!
- jeffj@seeker.mystic.com | Canada/USA Free Trade cost Canada 400,000 jobs.
- Infolinc BBS 510-778-5929 | Want to guess how many we'll lose to Mexico?
-
- ------------------------------
-
- Date: 27 Oct 1993 17:28:40 -0700
- From: dog.ee.lbl.gov!agate!howland.reston.ans.net!darwin.sura.net!udel!news.sprintlink.net!agphx.agcs.com!not-for-mail@network.ucsd.edu
- Subject: Questions regarding CTCSS, DTMF ???
- To: info-hams@ucsd.edu
-
- In article <millerpe.2.00100588@spot.colorado.edu> millerpe@spot.colorado.edu (Peter M. Miller) writes:
- >I am new to Ham Radio and I am looking to buy my first HT.
-
- I too am in the same boat (so to speak) - just passed for my No-Code Tech
- approximately two weeks ago! (Obflamebait: Will I go for code? [*] )
-
- >Right now I seem to like the Kenwood TH-78A.
-
- Stopped by HRO - Kenwood seems to be the only one to have literature to
- hand out at the store (why?)... so most of my questions will be based on
- the Kenwood, and paging through the HRO catalog. Side note: Interesting
- how "first impressions" (good or bad) are made regarding how much
- information can be found about a unit.
-
- >What is CTCSS? I see ads saying the unit has CTCSS encode/decode options.
- >What is DTMS squelch and DTMF paging?
-
- I understand the crossband repeat terms, but what does "full duplex
- cross band operation" mean?
-
- I'll take a stab at it (tell me how far off I am :) This allows the
- HT to receive a signal on 14x and re-transmit it on 44x, and any
- signal received on 44x be re-transmitted on 14x.
-
- Another question: This unit can operate with two frequencies in the same
- band (e.g. UHF + VHF, VHF + VHF, and UHF + UHF). How important / useful
- is this? Although not mentioned, can the unit do an in-band (correct
- terminology?) repeat?
-
- In the VHF freqs. it lists the RX as 118 - 173.9995 Mhz, TX 144 - 147.9995
- Mhz. What can you hear in the 118 - 144 and 148 - 173 Mhz ranges?
-
- Memory Expansion? Worth it? (You go from 50 memories to 250. 5x increase.)
- Typically, how many memories do people use on their HTs?
-
- Yes... more questions: When purchasing an HT, do you typically buy
- additional battery packs? (I'm assuming this would be a yes. :)
- If so, what types? High power, Long life? A mix? Why?
-
- If I get a lighter cord, will the batteries recharge while the HT is
- plugged in? Or, do they charge only when in the recharger?
-
- How well do the HTs stand up to abuse? (e.g. being dropped, shaken,
- rattled, accidently getting wet)
-
- I think this covers my initial set of questions... now to go and read about
- mobile transceivers!
-
- -Dan
-
- [*] To answer the question yes I do plan to go for code. <zzzzziiiipp>
- Phew! It was hot in that asbestos suit. I've been watching this group
- for a couple of months now. :) Why learn code? Why not? It's a
- challenge, gives me another tool to use if I so desire, and who knows,
- I might enjoy it. :) Kinda like learning sign language. A gal I dated
- knew it, and taught it to me. Yea, I was (pitifully) slow, but I could
- "read" and "speak" - great if you happen to be in different cars, on a
- bus where everyone can listen in, in a theater. That was interesting
- too - you could "read" the letters by feeling them! :) Have I used it
- since then, no, but given a little time, I'm sure I could pick it back
- up... The fun part was learning! (Now, if I could find someone to learn
- morse from.. :)
-
- Anyhow, to drag this back to the topic, I thought it might take me a
- while to learn code - so I just went ahead and tested to obtain a
- license so that I will be able to use some frequencies while I'm
- learning.
- --
- Dan Romanenko Voice: (602) 581-4663 AG Communication Systems
- Dept. Quality Consultant Fax: (602) 582-7111 P.O. Box 52179
- Internet: romanenkod@agcs.com Phoenix, AZ 85072-2179
- UUCP: ....!ncar!noao!enuucp!gtephx!romanenkod
-
- ------------------------------
-
- Date: 29 Oct 93 18:56:35 GMT
- From: ogicse!uwm.edu!spool.mu.edu!sdd.hp.com!col.hp.com!srgenprp!alanb@network.ucsd.edu
- Subject: Slowpokes
- To: info-hams@ucsd.edu
-
- Derek Wills (oo7@emx.cc.utexas.edu) wrote:
-
- : The nicest "poetic justice" thing to hear is the person who sends
- : "call??" right when the DX is giving their call. ZD9SXW gave his
- : call after every QSO when he was active for 3 weeks, all CW, and
- : around 30,000 QSOs, and people would still send "call??" at him.
-
- It's amazing how many people call the DX station without being able to
- hear him. You can tell because, on big pileups, there will still be
- people calling several minutes after the DX station announces hi is
- going QRT.
-
- AL N1AL
-
- ------------------------------
-
- Date: 29 Oct 93 12:38:00 CDT
- From: saimiri.primate.wisc.edu!caen!usenet.cis.ufl.edu!usenet.ufl.edu!gatech!howland.reston.ans.net!news.moneng.mei.com!uwm.edu!linac!uchinews!cdsmail!timbuk.cray.com!hemlock.cray.@sdd.hp.com
- Subject: Spread Spectrum
- To: info-hams@ucsd.edu
-
- In article c3c@altitude.HIP.CAM.ORG, ranfry@CAM.ORG (Marc Lombart) writes:
- |
- | My knowledge of Spread Spectrum is quite limited, but my
- |understanding is that it would probably not be viable as a HAM node,
- |seeing as it takes many times the normal bandwidth for each "channel."
- |The main use of Spread Spectrum is security, not communication. At
- |least, that is what I know from the little I have found on the subject.
- |
-
- If you wade through the ARRL study guide for the "extra" class exam you
- learn a little about where and in what modes hams are allowed to
- use spread spectrum. The exam questions are not to tough though. They
- give this little blurb asking you to name the mode, and most of the
- answers are clearly wrong. You wouldn't have had to read the manual.
-
- If I remember correctly you are not allowed to use spread spectrum
- in any band below 70 cm. There are other rules involved, like identifying
- your transmission on one frequency in the band being used. You
- must maintain a log of your transmissions.
-
- In article 5I9@netcom.com, wd6cmu@netcom.com (Eric Williams) writes:
- |
- |Security depends on the algorithm you use to "spread" the signal, so
- |you can make it pretty public if you want to. (I think current FCC
- |rules limit ham useage to a few well-known algorithms.)
-
- The manual saith, "Four spreading techniques are commony used in
- military and space communications, but amateurs are authorized
- to use tow of the four techniques: frequency hopping and direct
- sequence." (p. 8-18 of the ARRL EXTRA CLASS LICENSE MANUAL.)
-
-
-
-
- |As far as my limited understanding goes, the main advantage is
- |coordination: a set of well-coordinated and efficiently-used
- |conventional channels are more efficient of spectrum space than spread
- |spectrum, but you can throw a bunch of spread-spectrum users into a
- |band with *no* coordination and do almost as well. It really pays off
- |when users start moving around or coming and going with no warning.
- |That makes it ideal for consumer applications, the advantages for hams
- |are less clear.
- |
-
- Spread spectrum is supposed to have a big advantage against jammers.
- Spread spectrum ignores what is happening on narrow band transmissions.
-
-
-
-
-
- ---
- ______
- Sourdough and Ham KG0IO/AE | | |
- | | | obten comida,
- --David C. Adams dadams@cray.com | | | y sal de aqui!
- Statistician \____/
- Cray Research Inc. (____)
- .:. .
- . . :.
-
- ------------------------------
-
- Date: 27 Oct 1993 22:53:17 GMT
- From: psinntp!posc.org!sys14!waddell@uunet.uu.net
- Subject: Spread Spectrum
- To: info-hams@ucsd.edu
-
- I am also interested in Spread Spectrum and would be willing to work with other people on
- software/hardware.
- 73s KB5WXE
-
- In article <2am32v$7g@male.EBay.Sun.COM>, keithhar@eb5ts4.EBay.Sun.COM (Keith Hargrove) writes:
- |>
- |>
- |> Is there a news group for spread spectrum
- |> I would like to do some spread spectrum expermiting
- |> but info on ss seems hard to come by
- |> I see a blip once in a while in a HAM mag but never a working project
- |> and is there a C program to genarate PN codes??
- |>
- |> thanks
- |> -Keith N7QLR
- |>
- |>
- |>
-
- --
- ==========================================================================
- | Dave Waddell | |
- | waddell@posc.org | |
- | kb5wxe@kb5wxe.ampr.org | (713) 267-5103 |
- ==========================================================================
-
- ------------------------------
-
- Date: Fri, 29 Oct 1993 07:23:30 GMT
- From: rtech!amdahl!amd!netcomsv!netcom.com!jfh@decwrl.dec.com
- Subject: Studying in San Francisco
- To: info-hams@ucsd.edu
-
- msattler@netcom.com (Michael Sattler) wrote:
- >Those of you who sent me such inviting and pleasant email, thank you.
- >I haven't gotten back to all of you yet, but I will. Others worried
- >that I don't yet have a ticket and I'm playing with HTs. Let me put
- >those of you at ease; I haven't touched the PTT button yet. I am
- >working my way through the study book...
-
- [...]
-
- >I've modified my Kenwood TH-78A by removing diodes 4 and 5 as
- >specified and it's now able to do cross-band and rx 300-399 and
- >800-999 Mhz.
-
- Um, how do you know it can do cross-band repeat if it's never transmitted?
-
- --
-
- ----------------------------------------------------
- Jack Hamilton POB 281107 SF CA 94128 USA
- jfh@netcom.com kd6ttl@w6pw.#nocal.ca.us.na
-
- ------------------------------
-
- Date: 29 Oct 93 15:35:08 GMT
- From: ogicse!cadreor!fripp!usenet@network.ucsd.edu
- Subject: TenTec Century 22
- To: info-hams@ucsd.edu
-
- > If anyone could tell me more about them, I would be interested.
-
- Yeah, I have two of them. They are great CW rigs! No frills - simple design.
- Very fast QSK (full break-in), as all Ten-Tec rigs are. (Once you have used a
- rig with very fast QSK rig, it is very hard to go back to semi-break-in.
- Especially if you are into traffic handling or very fast "conversational" CW.
-
- The unit it very durable and smaller then the Ten-Tec 21. 20 watts out.
- The Circuit breaker tends to trip over on a > 3:1 swr for protection.
- Good audio filter. And the receiver sensitivity is very good for weak CW
- signals. If you are into QRP CW only and don't care about lots of bells
- and whisles, it is an ideal rig. The only problem I have found, is with
- the VFO dial. It is a analog dial driven by a "cord" - The cord tends to
- stretch and the needle no longer "tracks" with the movement of the dial.
- You can get a replacement cord from Ten-Tec for $2.00. I wish it had a
- digital freq readout like the Argosy (sp?). I am trying to find a way
- to add an LCD freq readout to replace the analog dial.
-
- I have worked all over the world on a number of bands with this rig using
- tuned dipoles - which proves the point once again that you do not need
- a high priced "rice burner" with all kinds of crazy features. And you
- do not need a high powered amp. And you don't even need an Ant tuner, if
- you work within the 2:1 swr points of your ant. (I am against ant tuners
- because they only give you the false impression that your ant is resonant.
- lots of power gets wasted in the Tuner itself - This is not acceptable with
- QRP)
-
- Anyway, if you can find one of these rigs, buy it!
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Dan Trainor Internet: dpt@cadre.com
- Cadre Technologies Inc. Voice: 401-351-5950
- 222 Richmond St. Fax: 401-455-6800
- Providence, RI 02903 Morse code: KB1JX
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
- ------------------------------
-
- End of Info-Hams Digest V93 #1284
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