Date: Wed, 10 Aug 94 04:30:20 PDT From: Ham-Digital Mailing List and Newsgroup Errors-To: Ham-Digital-Errors@UCSD.Edu Reply-To: Ham-Digital@UCSD.Edu Precedence: Bulk Subject: Ham-Digital Digest V94 #266 To: Ham-Digital Ham-Digital Digest Wed, 10 Aug 94 Volume 94 : Issue 266 Today's Topics: 900 MGHz FM 900 MHz spread spectrum systems (2 msgs) ??USING MAC WITH KPC-3 AN cell sites DRSI DPK-9600 to node stack? F6FBB Mailing List IP address Help (2 msgs) Is this the place to talk DSP? local organizations that help people get acquainted with packet radio Need Kam+ to HTX-202 Cable Need some help with the design of an Operational Amplifier Recommendations on low-power TNC Send Replies or notes for publication to: Send subscription requests to: Problems you can't solve otherwise to brian@ucsd.edu. Archives of past issues of the Ham-Digital Digest are available (by FTP only) from UCSD.Edu in directory "mailarchives/ham-digital". 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: 5 Aug 1994 05:02:44 GMT From: ihnp4.ucsd.edu!newshub.sdsu.edu!nic-nac.CSU.net!usc!howland.reston.ans.net!darwin.sura.net!aurora.LaTech.edu!ems@network.ucsd.edu Subject: 900 MGHz FM To: ham-digital@ucsd.edu Can anyone help get the circuits for FM transmitter/receiver in the range of 902-928. I need the circuits for a project I'm working on. ems@engr.latech.edu or 203 homer Ruston, La 71270 ------------------------------ Date: Mon, 8 Aug 1994 23:15:16 GMT From: news.sprintlink.net!news.dorsai.org!stevalln@uunet.uu.net Subject: 900 MHz spread spectrum systems To: ham-digital@ucsd.edu David R. Wolf (wolf@beta.lanl.gov) wrote: : lately i've become interested in the level of security actually provided by : the 900 mhz spread spectrum phones. for instance, could a hacker with a : pc and a smattering of outboard hardware have a good chance of decoding one's : 900MHz phone calls? : does anyone have any details on the ss systems used in, say, the escort : phones? spreading sequence generator, moduation methods, synchronization : schemes, etc.? one of the felows that i talked with at cincinnatti microwave : suggested that their phones choose a spreading sequence randomly whenever the : phone gets used. is this true? My understanding is that these phones use direct sequence spread spectrum. I was browsing thru a book on this the other day (idly, at the bookstore while looking for other stuff), and seem to recall reading that dsss is the easiest mode to sync to. I think you sort of slide your sequence back and forth over the signal, and when they're synced, the signal gets clear in an easily detectable way. (Can't remember the details of that, tho). If you know what you're doing, and have the sequence, it should be easy. I think there's lots of snake-oil out there involving security of these phones. When they say "Uses digital spread-spectrum techniques with 64,000 different codes," they may probably be saying that there's one sequence and 64K access codes to dial out, which is the same as an analog cordless with 64K security. -Steve p.s. There are reports that the audio is transmitted in the clear on 450 MHz. Not sure of the signal level, tho. ------------------------------ Date: Tue, 9 Aug 1994 13:58:00 GMT From: ihnp4.ucsd.edu!news.cerf.net!gopher.sdsc.edu!nic-nac.CSU.net!charnel.ecst.csuchico.edu!yeshua.marcam.com!zip.eecs.umich.edu!umn.edu!mr.net!idss.nwa.com!csinc!chrise@network.ucsd.edu Subject: 900 MHz spread spectrum systems To: ham-digital@ucsd.edu In article , Steve_Allen wrote: >David R. Wolf (wolf@beta.lanl.gov) wrote: >: lately i've become interested in the level of security actually provided by >: the 900 mhz spread spectrum phones. for instance, could a hacker with a >: pc and a smattering of outboard hardware have a good chance of decoding one's >: 900MHz phone calls? > [ deletions ] >-Steve >p.s. There are reports that the audio is transmitted in the clear on 450 >MHz. Not sure of the signal level, tho. > yes... I reported this late last week... and am still researching it. My phone though, is the Tropez 900 DL which is not spread-spectrum but digitally modulated on single carriers within the 900 MHz band. What I have found is that there is some leakage of in-the-clear audio in the 430 MHz amateur band from the handset. Others have found and reported similar signals. I am trying to get someone from VTech (the manufacturer of the phone) to discuss this with me... but they seem to be having trouble returning my calls. Chris -- Chris Elmquist, N0JCF voice: (612)631-7614 chrise@comtrol.com fax: (612)631-8117 ------------------------------ Date: Tue, 02 Aug 94 21:15:47 -0700 From: netcomsv!netcomsv!lavc!lou.meiss@decwrl.dec.com Subject: ??USING MAC WITH KPC-3 AN To: ham-digital@ucsd.edu Back on 08-02-94, Jeff said... > Thank you for reading this..I have a Mac Classic and a Mac Apple and > am considering using it with my KPC-3 with a Hostmaster program for > packet. Right now I am using a PC with the KPC-3 for packet and it wo > very well..Would this set up with the Mac work better?? Would it be f > or slower then the PC?. Does the MAC to TNC cable special?? Thanks f > reading this..Hope you can help..Jeff Jeff, It really won't make any difference which computer you use. The big difference will be which software you like. That's assuming you are going to use AX-25 Packet. In that mode, the TNC just looks like a Modem to the computer. Matter of fact, I run Procomm when I do AX-25 with my PC. I suppose one difference might be, if you are using an older PC (XT, slow 286) and are unable to run 9600 baud between the computer and TNC, then you might see an increase in the presumed speed with the MAC. AX-25 packet with the KPC-3 is still only 1200 baud on VHF and 300 baud on HF. That won't change no matter what computer you use. As far as cables go, just about any standard RS-232 Serial cable will work just fine. The only difference would be the connector on the back of the MAC. Hope this helps and let me know if I can be any more help, 73 de Lou AMPRnet - wa6epd@wa6epd.ampr.org [44.16.1.24] Internet - lou.meiss@support.com AX-25 - wa6epd@wb6wfh.#soca.ca.usa.noam ------------------------------ Date: 10 Aug 1994 02:30:11 GMT From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!vixen.cso.uiuc.edu!sdd.hp.com!hpscit.sc.hp.com!cupnews0.cup.hp.com!cupnews2.cup.hp.com!bmp@network.ucsd.edu Subject: cell sites To: ham-digital@ucsd.edu yctcsl@cerfnet.com wrote: : Does anyone have any info regarding the rate paid by PacBell (AirTouch) for : establishing a cell site lease. The offers been made however I'd be interested to : find out just what being paid these days. I'd negotiate for a phone or two with free airtime as part of the deal. Brian ------------------------------ Date: Tue, 9 Aug 1994 16:22:16 GMT From: ihnp4.ucsd.edu!dog.ee.lbl.gov!newshub.nosc.mil!avalon.chinalake.navy.mil!gawain.chinalake.navy.mil!jan@network.ucsd.edu Subject: DRSI DPK-9600 to node stack? To: ham-digital@ucsd.edu Hello all! I need to figure out the mod for the DRSI DPK-9600 TNC so that the serial port talks xlink with TheNet X-1J. I've done this with 3 or so TNC-2s, but I can't figure out where the JMP9 or for that matter, where pin 23 is (it has a DB-9 connector) Anyone offer some hints? 73, jan kc6uth jan@archimedes.chinalake.navy.mil ------------------------------ Date: Sun, 7 Aug 1994 21:30:13 -0600 From: ihnp4.ucsd.edu!ucsnews!newshub.sdsu.edu!nic-nac.CSU.net!usc!howland.reston.ans.net!spool.mu.edu!bloom-beacon.mit.edu!senator-bedfellow.mit.edu!pschleck@network.ucsd.edu Subject: F6FBB Mailing List To: ham-digital@ucsd.edu Welcome! You have joined the f6fbb-list@stat.com The purpose of this server is to provide Sysops and Networkers with tricks/tips/help and new software updates concerning the F6FBB bulletin board system. Exchange of UUENCODED files through the server is ok. Your Sysop for the server is Daniel J. Meredith, (n7mrp@n7mrp.az.usa.na), (daniel.meredith@aznetig.stat.com). ---- To Send Mail To Be Distributed To All Subscribers: f6fbb-list@stat.com And Send Normal Subject And Text. ---- To REMOVE Yourself From This Server, Please Send Electronic Mail To: listserv@stat.com And Include The Command: unsubscribe f6fbb-list As The First Line of Your Message. ---- To ADD Yourself To This List, Please Send Electronic Mail To: listserv@stat.com And Include The Command: subscribe f6fbb-list As The First Line of Your Message. ---- Requests For HELP From A SYSOP - Send E-mail To: f6fbb-list-request@stat.com The F6FBB Server has been established to help Sysops and Networkers alike, in providing help and information in a timely manner. Sharing of software and other miscellaneous information via the server is quite alright. Best Wishes! Daniel J. Meredith Listowner F6FBB-LIST@STAT.COM \---------------------------------------------------------------------------/ Daniel J. Meredith |Internet: daniel.meredith@aznetig.stat.com P.O. Box 44563 | Ax.25: n7mrp@n7mrp.az.usa.na Phoenix, Arizona |ListOwner: f6fbb-list@stat.com 85064-4563 ___|"ALL Comments Are My OWN, NOT My Employer" Voice : +1-602-809-7384 | BELL ATLANTIC MOBILE SYSTEMS Home & Fax : +1-602-956-2566 | Internet: ba.com Data PBBS : +1-602-912-0225 | Banyon: Daniel J. Meredith@CS_TEMPE@BAMASW --- Editor, HICNet Medical Newsletter Internet: david@stat.com FAX: +1 (602) 451-1165 Bitnet : ATW1H@ASUACAD ------------------------------ Date: 6 Aug 94 09:10:00 GMT From: lll-winken.llnl.gov!overload.lbl.gov!agate!howland.reston.ans.net!gatech!wa4mei!totrbbs!steve.diggs@ames.arpa Subject: IP address Help To: ham-digital@ucsd.edu Bob, Here is a recent list of the US IP address coordinators. I deleted the Int'l folks for brevity. Let me know if you need them, too. SD AMPRNet IP address coordinators as of 11 July 1994 Corrections and updates to brian@ucsd.edu. Note: the people listed here have volunteered to issue IP addresses for their areas. They are not paid to do this service; please understand that they are perfectly at ease to deal with coordination responses at a lower priority than the things that matter more, such as job and family. Please be patient when requesting an address. 44.002 Bob Meyer K6RTV Calif: Sacramento 44.004 Douglas Thom N6OYU Calif: Silicon Valley - San Francisco 44.006 Don Jacob WB5EKU Calif: Santa Barbara/Ventura 44.008 Brian Kantor WB6CYT Calif: San Diego 44.010 Terry Neal AA6TN Calif: Orange County 44.012 Steven King KD7RO Eastern Washington,Idaho 44.014 John Shalamskas KJ9U Hawaii & Pacific Islands 44.016 Jeff Angus WA6FWI Calif: Los Angeles - S F Valley 44.017 Dana Myers KK6JQ Calif: Antelope Valley/Kern County 44.018 Geoffrey Joy KE6QH Calif: San Bernardino & Riverside 44.020 Fred Schneider K0YUM Colorado: Northeast 44.022 John Stannard KL7JL Alaska 44.024 Bob Donnell KD7NM Washington state: Western (Puget Sound) 44.026 Ron Henderson WA7TAS Oregon 44.028 Jack Snodgrass KF5MG Texas: North 44.030 J Gary Bender WS5N New Mexico 44.032 Bdale Garbee N3EUA Colorado: Southeast 44.034 Jeff Austen K9JA Tennesee 44.036 Doug Drye KD4NC Georgia 44.038 Mike Abbott N4QXV South Carolina 44.040 Matt Simmons KG7MH Utah 44.042 John Martin KB5GGO Mississippi 44.044 Bob Wilson KA1XN Massachusetts: western 44.046 Stan Wilson AK0B Missouri 44.048 Jacques Kubley KA9FJS Indiana 44.050 Ron Breitwisch KC0OX Iowa 44.052 Gary Grebus K8LT New Hampshire 44.054 Ralph Stetson KD1R Vermont 44.056 Johnathan Vail N1DXG Eastern&Central Mass 44.058 Rich Clemens KB8AOB West Virginia 44.060 Howard Leadmon WB3FFV Maryland 44.062 Jim DeArras WA4ONG Virginia 44.062 Jon Gefaell KD4CQY Virginia (Charlottesville Area) 44.064 Dave Trulli NN2Z New Jersey: northern 44.065 Bob Applegate WA2ZZX New Jersey: southern 44.066 John DeGood NU3E Delaware 44.068.1-32 Bob Foxworth K2EUH New York: NYC & Long Island 44.068.64+ Bob Bellini N2IGU New York: ENY 44.069 Paul Gerwitz WA2WPI New York: WNY 44.070 Gary Sanders N8EMR Ohio 44.072 Ken Stritzel WA9AEK Chicago - North Ill. 44.073 Chuck Henderson WB9UUS South/Central Ill. 44.074 Mark Bitterlich WA3JPY North Carolina (east) 44.075 Charles Layno WB4WOR North Carolina (west) 44.076 Kurt Freiberger WB5BBW Texas: south 44.077 Rod Huckabay KA5EJX Texas: west 44.078 Joe Buswell K5JB Oklahoma 44.080 Doug Crompton WA3DSP Pennsylvania: eastern 44.082 Steven Elwood N7GXP Montana 44.084 Bob Ludtke K9MWM Colorado: Western 44.086 Reid Fletcher WB7CJO Wyoming 44.088 Bill Lyman N1NWP Connecticut 44.090 Mike Nickolaus NF0N Nebraska 44.092 Pat Davis KD9UU Wisconsin, upper peninsula Michigan 44.094 Andy Warner N0REN Minnesota 44.096 Don Bennett K4NGC District of Columbia 44.098 Brian A. Lantz KO4KS Florida 44.100 Richard Elling KB4HB Alabama 44.102 Jeff King WB8WKA Michigan (lower peninsula) 44.104 Charles Greene W1CG Rhode Island 44.106 Allan B Dayton N0KFO Kentucky 44.108 James Dugal N5KNX Louisiana 44.110 Richard Duncan WD5B Arkansas 44.112 Bob Hoffman N3CVL Pennsylvania: western 44.114 Steven Elwood N7GXP N&S Dakota 44.116 Tom Kloos WS7S Oregon: NW&Portland,Vancouver WA 44.118 Carl Ingerson N1DXM Maine 44.120 unassigned 44.122 Dale Puckett K0HYD Kansas 44.123 Bernie McDonnell NP2W Virgin Islands 44.124 David Dodell WB7TPY Arizona 44.125.0-126 Earl Petersen KF7TI Southern Nevada 44.125.128-254 Bill Healy N8KHN Northern Nevada 44.126 Karl Wagner KP4QG Puerto Rico # # 44.128 is reserved for testing. Do not use for operational networks. # You may safely assume that any packets with 44.128 addresses are bogons # unless you are using them for some sort of testing # 44.128 TEST # ---- Top Of The Rock BBS - Lilburn, GA SYSOP: Steve Diggs UUCP: totrbbs.atl.ga.us Snailmail: 4181 Wash Lee Ct. Phone: +1 404 921 8687 Lilburn, GA 30247-7407 ------------------------------ Date: 9 Aug 1994 09:39:34 -0400 From: noc.near.net!chaos.dac.neu.edu!not-for-mail@uunet.uu.net Subject: IP address Help To: ham-digital@ucsd.edu I'll place the IP address coordination listing into the Boston Amateur Radio Club archives on oak.oakland.edu. It'll be in the /pub/hamradio/docs/misc directory under the title ip-coords 73, Scott -- Scott Ehrlich, Amateur Radio Callsign: wy1z wy1z@ka2jxi.ny [AX.25 Packet] How to reach me: wy1z@neu.edu [Internet], wy1z@k2cc.ampr.org [TCP/IP Packet] Boston ARC ftp archives: ftp oak.oakland.edu /pub/hamradio Boston ARC Web page: http://www.acs.oakland.edu/barc.html ------------------------------ Date: 8 Aug 1994 18:15:29 -0700 From: ihnp4.ucsd.edu!galaxy.ucr.edu!library.ucla.edu!agate!barrnet.net!nntp.crl.com!crl3.crl.com!not-for-mail@network.ucsd.edu Subject: Is this the place to talk DSP? To: ham-digital@ucsd.edu Allen Hall (ahall@ux4.cso.uiuc.edu) wrote: : Hey guys, : Just wondering if I should be cross-posting or just posting or what my : home-brew questions (and technical q's about concepts) about DSP to : digital.misc? : Basically, I have come into the ownership of a very nice Analog Devices : dsp chip, and I am working on making a DSP unit out of it. I am very very : new to the concepts involved with DSP, and I need as much information as I : can get. : So far, I have been posting to .homebrew, but if you think I should post : some here, please tell me, because I need all the help I can get! : Thanks for you help and information! : Allen Hall n9rzc@uiuc.edu : ps- if you know where I can start, please e-mail me with : comments/suggestions/ideas : TNX et 73! Allen, Check the comp.dsp news group, it is all DSP. Also, the faq is at: evans.ee.adfa.oz.au:/pub/dsp/dsp-faq.help If any more questions, email me. Smitty, NA5K -- Henry Smith (hbs@crl.com) ------------------------------ Date: 8 Aug 1994 23:08:06 -0500 From: cs.utexas.edu!natinst.com!not-for-mail@uunet.uu.net Subject: local organizations that help people get acquainted with packet radio To: ham-digital@ucsd.edu I'm interested in getting involved in some packet radio and was wondering if someone could tell me what local organizations that I might be able to get involved in to meet people who are using this technology and would be interested in introducing someone else to it. Also I was wondering if directional dish antennas at the GHz frequencies wouldn't be best to provide for reuse of bandwidth and use of less power. Thanks. mike ------------------------------ Date: 9 Aug 1994 00:38:04 -0400 From: newstf01.cr1.aol.com!search01.news.aol.com!not-for-mail@uunet.uu.net Subject: Need Kam+ to HTX-202 Cable To: ham-digital@ucsd.edu I'm looking for a cable to match my Radio Shack 2meter rig to my Kam Plus.... I'll gladly pay for one. Matt/N8QNW ------------------------------ Date: 9 Aug 94 00:16:14 CDT From: ihnp4.ucsd.edu!ucsnews!sol.ctr.columbia.edu!howland.reston.ans.net!vixen.cso.uiuc.edu!newsfeed.ksu.ksu.edu!moe.ksu.ksu.edu!kuhub.cc.ukans.edu!christos@network.ucsd.edu Subject: Need some help with the design of an Operational Amplifier To: ham-digital@ucsd.edu hello there, I have a question concerning design of a simple amplifier using operational amplifiers. I am simply designing a noninverting amplifier with a gain of 2, that is R1=R2 ( Closed Loop Gain=(1+R2/R1) ). No matter what I apply to the input of the amp the output always saturates to -11 Volts. Even if no input is applied the output still gives a -11V. The voltages that I am applying to the Vcc+ and Vcc- of the op amp are +12V and -12V respectively. I am using the LM 741 opamp for this application. Does anybody in this group happen to know what the problem might be? I would appreciate any relevant response. Please e-mail. Thanks in advance Chris ------------------------------ Date: Tue, 9 Aug 1994 00:28:51 GMT From: newsflash.concordia.ca!nstn.ns.ca!cs.dal.ca!cfn.cs.dal.ca!aa770@uunet.uu.net Subject: Recommendations on low-power TNC To: ham-digital@ucsd.edu Mark Cheeseman (cheese@active.asstdc.com.au) wrote: : I'm looking for a TNC for portable field applications, so low power : consumption is a primary consideration. Small physical size would : The KPC-3 looks like it'll fit the bill, and the Tiny 2 might too, : should be considering, or anything (bad) I should know about either : Thanks in advance, : Mark VK2XGK Well Mark owning a KPC-3 I can attest that if you select the "leds off " and setting "cd internal" the tnc does last a long time on 9 volts it is quite capable of 3-5 day activity depending on how much you are active. I would say your choice comes down to this if you have a full laptop then a baycom would do the trick feeding off the computer if you wanted more features such as mailbox without computer then the kpc 3 is the way to go. 73's for now hope this helps (-- de VE1BT rob..... : -- : Mark Cheeseman cheese@active.asstdc.com.au 712/412.0 [+61 2 314 6117] : PO Box 1287 North Sydney NSW 2015 Ph +61 2 966 1722 Fax +61 2 955 8871 -- Robert Harpelle Internet address aa770@cfn.dal.ns.ca paket address VE1BT@#VE1BBS.NS.CA Dartmouth, Nova Scotia, Canada ------------------------------ End of Ham-Digital Digest V94 #266 ******************************