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- Date: Sat, 13 Aug 94 01:28:45 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 V94 #908
- To: Info-Hams
-
-
- Info-Hams Digest Sat, 13 Aug 94 Volume 94 : Issue 908
-
- Today's Topics:
- ARLP033 Propagation de KT7H
- Bearcat 101
- CHU Digital Transmission Format?
- Daily Summary of Solar Geophysical Activity for 11 August
- Interference to X-10 home automation?
- Mobile radio in Acura Integra?
- NEED! Technics Manual/Circuit RS-B48R
- Qs on no code FCC license and Hardware
- RF hazards
- TNC construction article
- VE8KM 6M beacon
- VK2WI Weekly News, 7th August, 1994
- W2NSD
-
- 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: Fri, 12 Aug 1994 18:41:33 MDT
- From: ihnp4.ucsd.edu!dog.ee.lbl.gov!overload.lbl.gov!agate!howland.reston.ans.net!usc!nic-nac.CSU.net!charnel.ecst.csuchico.edu!psgrain!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu
- Subject: ARLP033 Propagation de KT7H
- To: info-hams@ucsd.edu
-
- SB PROP @ ARL $ARLP033
- ARLP033 Propagation de KT7H
-
- ZCZC AP47
- QST de W1AW
- Propagation Forecast Bulletin 33 ARLP033
- >From Tad Cook, KT7H
- Seattle, WA August 12, 1994
- To all radio amateurs
-
- SB PROP ARL ARLP033
- ARLP033 Propagation de KT7H
-
- Solar activity is still low. Don't expect much improvement over the
- next few years. We can expect a slight improvement in the short
- term over the solar flux values in the mid seventies that we have
- had lately. Around August 21 through 24 the flux is expected to
- climb up to around 90.
-
- Recently geomagnetic disturbances have been low, but currently we
- are experiencing slightly disturbed conditions from a recurring
- coronal hole. This may continue for a few more days.
-
- Sunspot Numbers from August 4 through 10 were 21, 27, 29, 18, 18, 18
- and 33, with a mean of 23.4. 10.7 cm flux was 75.2, 75.7, 75.3,
- 75.8, 73.8, 73.5 and 77.6, with a mean of 75.3.
-
- The path projection for this week is from the center of the United
- States to Central Europe.
-
- 80 meters should be open from 0200z to 0430z, and 40 meters from
- 0030z to 0530z. 30 meters looks good from 0500z to 0700z, and again
- from 2230z to 0130z. 20 meters should be open most days from 1830z
- to 2330z, with the best time around 2130z or 2200z. The bands above
- 20 meters do not look good at this time.
-
- NNNN
- /EX
-
- ------------------------------
-
- Date: 8 Aug 1994 01:44:04 GMT
- From: ankh.iia.org!ralph.vnet.net!raykale@uunet.uu.net
- Subject: Bearcat 101
- To: info-hams@ucsd.edu
-
- Robert E Langley (relangl0@sacam.OREN.ORTN.EDU) wrote:
- : : This radio is about twenty years old or more. It has 18 channels and an
- : : LED light for each channel along with a three position switch under
- : each light. In the bottom right are two switches for programming.
-
- : : Does anyone remember this radio and how to program it?
-
- : Thanks
- : relangl0@sacam.oren.ortn.edu
-
-
- Bob,
-
- Is this a xtal operated radio?
-
- Ray
-
- ------------------------------
-
- Date: 12 Aug 1994 20:50:07 GMT
- From: newsgate.watson.ibm.com!watnews.watson.ibm.com!usenet@uunet.uu.net
- Subject: CHU Digital Transmission Format?
- To: info-hams@ucsd.edu
-
- In <CuEI0F.F1o@cs.dal.ca>, aa770@cfn.cs.dal.ca (Robert Harpelle) writes:
- >Robert G. Schaffrath (RGS@gfimda.UUCP) wrote:
- >: I read here recently that CHU in Canada digitally broadcasts the time between
- >: the 30 and 40 second marks. Does anyone on here know the format of the data? I
- >: recalled that the encoding is Bell 103 (300 baud) so I tried hooking up an old
-
- ------------------------------
-
- Date: Fri, 12 Aug 1994 02:31:42 MDT
- From: ihnp4.ucsd.edu!library.ucla.edu!csulb.edu!nic-nac.CSU.net!charnel.ecst.csuchico.edu!yeshua.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@@.
- Subject: Daily Summary of Solar Geophysical Activity for 11 August
- To: info-hams@ucsd.edu
-
- /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
-
- DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY
-
- 11 AUGUST, 1994
-
- /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
-
- (Based In-Part On SESC Observational Data)
-
-
- SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 11 AUGUST, 1994
- ----------------------------------------------------------
-
- !!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 223, 08/11/94
- 10.7 FLUX=076.7 90-AVG=079 SSN=037 BKI=4433 3323 BAI=017
- BGND-XRAY=A3.0 FLU1=5.2E+05 FLU10=1.4E+04 PKI=3333 3333 PAI=016
- BOU-DEV=046,048,026,028,038,035,011,021 DEV-AVG=031 NT SWF=00:000
- XRAY-MAX= B1.2 @ 0123UT XRAY-MIN= A2.5 @ 1033UT XRAY-AVG= A4.3
- NEUTN-MAX= +001% @ 1300UT NEUTN-MIN= -003% @ 2110UT NEUTN-AVG= -0.7%
- PCA-MAX= +0.3DB @ 1520UT PCA-MIN= -0.1DB @ 2340UT PCA-AVG= +0.0DB
- BOUTF-MAX=55232NT @ 1223UT BOUTF-MIN=55191NT @ 1701UT BOUTF-AVG=55216NT
- GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+066,+000,+000
- GOES6-MAX=P:+125NT@ 1947UT GOES6-MIN=N:-031NT@ 0023UT G6-AVG=+094,+031,-014
- FLUXFCST=STD:077,077,077;SESC:077,077,077 BAI/PAI-FCST=020,015,015/020,015,015
- KFCST=3335 4323 4343 2132 27DAY-AP=017,026 27DAY-KP=4332 3334 5435 4333
- WARNINGS=
- ALERTS=
- !!END-DATA!!
-
- NOTE: The Effective Sunspot Number for 10 AUG 94 was 26.7.
- The Full Kp Indices for 10 AUG 94 are: 3- 2- 3+ 2- 4- 4o 4o 3-
- The 3-Hr Ap Indices for 10 AUG 94 are: 11 7 18 7 25 27 29 11
- Greater than 2 MeV Electron Fluence for 11 AUG is: 4.6E+06
-
-
- SYNOPSIS OF ACTIVITY
- --------------------
-
- Solar activity continued very low. Region 7762 (N04W51)
- showed trailer decay. A small H-class spot rotated around the
- east limb and was numbered as new Region 7764 (S05E68).
-
- Solar activity forecast: solar activity should continue
- at the very low level. There is a slight probability of a
- C-class flare from either Region 7762 or 7764.
-
- The geomagnetic field was mostly unsettled to active. Some
- high latitude sites experienced brief periods of minor storming
- in the 1200-1500Z reporting period. Energetic electron fluxes
- began to increase near 1300Z and reached moderate levels at the
- end of the period.
-
- Geophysical activity forecast: the geomagnetic field
- should be unsettled to active on 12 Aug. Mostly unsettled
- conditions are forecast for 13-14 Aug but isolated active
- intervals are likely during that time. Energetic electron
- fluxes at geosynchronous orbit could reach high levels on
- 12 Aug.
-
- Event probabilities 12 aug-14 aug
-
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
-
- Geomagnetic activity probabilities 12 aug-14 aug
-
- A. Middle Latitudes
- Active 40/35/30
- Minor Storm 20/15/10
- Major-Severe Storm 10/05/01
-
- B. High Latitudes
- Active 45/40/35
- Minor Storm 20/20/15
- Major-Severe Storm 10/10/05
-
- HF propagation conditions were unsettled during the first
- half of the UTC day. Transauroral night-sector circuits
- experienced periods of minor signal degradation, but most other
- regions were near-normal. By the end of the UTC day, most
- regions, including night-sector transauroral circuits were
- near-normal. Slight signal degradation can still be
- periodically expected over the night-sector high-latitude
- regions over the next 24 to 48 hours. Most other regions
- should continue to see near-normal propagation.
-
-
- COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS
- ========================================================
-
- REGIONS WITH SUNSPOTS. LOCATIONS VALID AT 11/2400Z AUGUST
- ---------------------------------------------------------
- NMBR LOCATION LO AREA Z LL NN MAG TYPE
- 7762 N04W52 114 0100 CSO 06 005 BETA
- 7763 S12W31 093 0000 AXX 01 001 ALPHA
- 7764 S05E67 355 0060 HSX 02 001 ALPHA
- REGIONS DUE TO RETURN 12 AUGUST TO 14 AUGUST
- NMBR LAT LO
- NONE
-
-
- LISTING OF SOLAR ENERGETIC EVENTS FOR 11 AUGUST, 1994
- -----------------------------------------------------
- BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP SWF
- NO EVENTS OBSERVED
-
-
- POSSIBLE CORONAL MASS EJECTION EVENTS FOR 11 AUGUST, 1994
- ---------------------------------------------------------
- ISOLATED HOLES AND POLAR EXTENSIONS
- EAST SOUTH WEST NORTH CAR TYPE POL AREA OBSN
- NO DATA AVAILABLE FOR ANALYSIS
-
-
- SUMMARY OF FLARE EVENTS FOR THE PREVIOUS UTC DAY
- ------------------------------------------------
-
- Date Begin Max End Xray Op Region Locn 2695 MHz 8800 MHz 15.4 GHz
- ------ ---- ---- ---- ---- -- ------ ------ --------- --------- ---------
- 10 Aug: 1214 1224 1239 B1.5
- 2140 2144 2147 B1.1
-
-
- REGION FLARE STATISTICS FOR THE PREVIOUS UTC DAY
- ------------------------------------------------
-
- C M X S 1 2 3 4 Total (%)
- -- -- -- -- -- -- -- -- --- ------
- Uncorrellated: 0 0 0 0 0 0 0 0 002 (100.0)
-
- Total Events: 002 optical and x-ray.
-
-
- EVENTS WITH SWEEPS AND/OR OPTICAL PHENOMENA FOR THE LAST UTC DAY
- ----------------------------------------------------------------
-
- Date Begin Max End Xray Op Region Locn Sweeps/Optical Observations
- ------ ---- ---- ---- ---- -- ------ ------ ---------------------------
- NO EVENTS OBSERVED.
-
- NOTES:
- All times are in Universal Time (UT). Characters preceding begin, max,
- and end times are defined as: B = Before, U = Uncertain, A = After.
- All times associated with x-ray flares (ex. flares which produce
- associated x-ray bursts) refer to the begin, max, and end times of the
- x-rays. Flares which are not associated with x-ray signatures use the
- optical observations to determine the begin, max, and end times.
-
- Acronyms used to identify sweeps and optical phenomena include:
-
- II = Type II Sweep Frequency Event
- III = Type III Sweep
- IV = Type IV Sweep
- V = Type V Sweep
- Continuum = Continuum Radio Event
- Loop = Loop Prominence System,
- Spray = Limb Spray,
- Surge = Bright Limb Surge,
- EPL = Eruptive Prominence on the Limb.
-
-
- ** End of Daily Report **
-
- ------------------------------
-
- Date: Fri, 12 Aug 1994 17:07:37 GMT
- From: ihnp4.ucsd.edu!dog.ee.lbl.gov!overload.lbl.gov!agate!howland.reston.ans.net!vixen.cso.uiuc.edu!usenet.ucs.indiana.edu!indyvax.iupui.edu!jsissom.dmed.iupui.edu!JAY@network.ucsd.edu
- Subject: Interference to X-10 home automation?
- To: info-hams@ucsd.edu
-
- I haven't had any X-10 problems with 2M or 440 transmissions, but when my
- laser printer prints, a light in the next bedroom turns on. I haven't figured
- out why yet.
-
- Jay
- KA9OKT
-
- >I suspect your friend may have other problems causing the X-10
- to trigger,>like high RF levels do to antenna problems. I suspect he may also
- be>having RFI problems with other devices in his house.
-
- >I run up to a KW on 40 through 10 and have not had a problem with RF
- >triggering the X-10s. Touch lamps are another story. Those darn things
- >tolerate very little RF. I have had some success in keeping RF out of
- >the lamps by wrapping the power cord in a toroid core (Radio Shack #273-104).
-
-
- >Mike Suhar WB8GXB
- >mds@meaddata.com
-
- ------------------------------
-
- Date: Thu, 11 Aug 1994 00:58:48 GMT
- From: ihnp4.ucsd.edu!swrinde!sdd.hp.com!col.hp.com!news.dtc.hp.com!hpscit.sc.hp.com!icon!greg@network.ucsd.edu
- Subject: Mobile radio in Acura Integra?
- To: info-hams@ucsd.edu
-
- Well, this general topic seems to be the rage right now, so I'll ask my $.02.
-
- I am planning on installing a mobile rig in a '94 Acura Integra GS-R. The
- plan is to use a Kenwood 733, mounted under the driver seat, with the remote
- display on the dash below the radio. Heavy wires (12ga?) go direct to the
- battery, though I haven't found a good route yet. Each has a fuse, and the
- positive goes through a relay tied to the ignition so that the radio goes off
- when the engine is turned off, maybe with an override switch. I know that
- Gary and others tell me to drill the hole, but I just can't do that, so for
- an antenna I plan to use a Larsen dual-band glass mount on the side window
- on the driver side. Mount the antenna as high as possible in the window,
- yet still have the top of the antenna below the garage door - probably puts
- the glass mounting thingy about in the middle of the window. Oh, and I probably
- need to have the radio itself grounded where it's mounted, I expect to one of
- the bolts on the seat's mounting rails.
-
- I know this plan has compromises: antenna on the side of the car is not as
- good as the middle (height restriction), on-the-glass antenna not as good
- as through-the-metal, etc.
-
- BUT - is there anything glaring that I have forgotten? I didn't see any
- mention of warranty problems, and the dealer didn't know of any either,
- although I didn't ask *everyone* about it, or have them sign anything.
- I have read reports of problems of ignition noise, so perhaps I would need
- to do some bypassing and/or ferrite-ing of the power wires. My fingers are
- crossed, however, since the reports were for the 89-90 cars which were known
- for having "igniter" problems.
-
- Did I miss anything?
-
-
- Thanks,
-
- Greg KD6KGW
-
- ------------------------------
-
- Date: 12 Aug 94 19:00:18 GMT
- From: ihnp4.ucsd.edu!library.ucla.edu!csulb.edu!nic-nac.CSU.net!usc!howland.reston.ans.net!EU.net!Germany.EU.net!nntp.gmd.de!dearn!barilvm!vms.huji.ac.il!gorski@network.ucsd.edu
- Subject: NEED! Technics Manual/Circuit RS-B48R
- To: info-hams@ucsd.edu
-
- The following is being sent at the request of Avi 4X6UA.
-
- ++++++++++++++++
- I need a circuit diagram or preferably a service manual for a TECHNICS
- model RS-B48R tape deck or similar. The manufacturer no longer holds this
- information. I will be happy to defray any costs for photocopying, mailing,
- etc.,. Please reply to the sender of this message, and include an address
- to which I can mail a check for your expenses.
-
- Thanks very much.
-
- Avi Esterson, 4X6UA
-
- +++++++++++++++
-
- Any answers can be sent directly to him via the call-book or I will be
- happy to relay any messages to him.
-
- Thanks for any help anyone can give him.
-
- 73's and Shalom from Jerusalem
-
- ------------------------------
-
- Date: Thu, 11 Aug 1994 14:17:59 -0700
- From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!swrinde!elroy.jpl.nasa.gov!lll-winken.llnl.gov!apple.com!goofy-2.apple.com!user@network.ucsd.edu
- Subject: Qs on no code FCC license and Hardware
- To: info-hams@ucsd.edu
-
- I know this question has probably been ask a hundred times before but I┼am
- new to amateur radio, and internet, and I┼want to know exactly what
- frequencies you can operate on with the no code license. Such as 2m,
- 220mhz, 440mhz 6m, etc..? Also, what brand(s) of handheld and desktop
- radios are the popular ones. I want something that is going to be reliable
- and have user friendly features. One more thing, I need recommendations on
- amateur radio and satellite magazines.
-
- Thanks in advance.
-
- ------------------------------
-
- Date: Fri, 12 Aug 1994 20:18:02 GMT
- From: ihnp4.ucsd.edu!news.cerf.net!gopher.sdsc.edu!news.tc.cornell.edu!travelers.mail.cornell.edu!news.kei.com!world!news.bu.edu!gw1.att.com!nntpa!not-for-mail@network.ucsd.edu
- Subject: RF hazards
- To: info-hams@ucsd.edu
-
- jfilner (jfilner@reed.edu) wrote:
- : twp77@isuvax.iastate.edu writes:
-
-
- : effects of RF. The speaker on the reciever at least is going to
-
- Did you mean magnetic waves at audio frequencies produced by the
- voice coil?
-
- ------------------------------
-
- Date: Sat, 13 Aug 94 01:45:18 CST
- From: dog.ee.lbl.gov!overload.lbl.gov!agate!howland.reston.ans.net!cs.utexas.edu!convex!news.duke.edu!news-feed-1.peachnet.edu!umn.edu!newsdist.tc.umn.edu!msus1.msus.edu!msus1@ihnp4.ucsd.edu
- Subject: TNC construction article
- To: info-hams@ucsd.edu
-
- Does anybody know of a construction article for a "general purpose" TNC?
-
- These are my reguirements:
- 1) Standard serial connection. (I have 4 different computers and would like
- to be able to connect to all).
-
- 2) An internal processor of some type to minimize the overhead on the
- computer.
-
- If these are too strict, please let me know.
- Thanks.
-
- Bill Soranno -- KB0NKX
- 7 Fairfax
- Winona, MN 55987
- 507/452-3789
-
- ------------------------------
-
- Date: Thu, 11 Aug 1994 14:49:21 -0800
- From: news.sprintlink.net!news.world.net!news.teleport.com!ip-cb.teleport.com!user@uunet.uu.net
- Subject: VE8KM 6M beacon
- To: info-hams@ucsd.edu
-
- As many 6M ops know, the evening of 13 July was a good openning for US and
- VE 6m stations. Here in CN85 I noticed a signal around 50.004 beaming 30
- degrees at 0515Z (14 July) which I thought was a European TV signal. It
- was a steady carrier, with some warble, running about S-5. About 0600Z
- finally caught the id, VE8KM (DP79.) This beacon id's once every 5
- minutes with " de VE8KM." This beacon was up to S-7 and did not start to
- go into the noise until past 0700Z. Myself and KE7CX gave a few calls
- towards Europe on 50.110 after 0500Z. I would be interested to hear if
- any European 6M ops have heard this beacon this summer. TNX.
-
- de Dave, N7DB (CN85)
-
- --
- Dave Bernhardt dbcntcas@teleport.com
-
- ------------------------------
-
- Date: 13 Aug 1994 17:51:03 +1000
- From: ihnp4.ucsd.edu!dog.ee.lbl.gov!overload.lbl.gov!agate!msuinfo!harbinger.cc.monash.edu.au!yarrina.connect.com.au!warrane.connect.com.au!kralizec.zeta.org.au!not-for-mail@network.ucsd.edu
- Subject: VK2WI Weekly News, 7th August, 1994
- To: info-hams@ucsd.edu
-
- Dave VK2KFU wrote (quoting Mike Corbin VK2PFQ):
-
- > I inform you of these things so that you can be aware of the sort
- > of rubbish the "Council" is forced to put up with.
-
- I'm glad that Uncle Mike has finally woken up to Harrison & Co., and
- is starting to speak out. Perhaps now, the mushrooms out in the
- country areas will start to realise what's been going on for the
- last year or so.
-
- > ...There is a
- > light at the end of the tunnel,...
-
- The light shining out of Roger Harrison's ass, I expect (though I
- hope not)
-
- > ...which leads me to what was stated
- in the letter from the Divisional Barrister.
- :
- :
- > (i) Provide for a fresh election for all Council positions. (that's
- > pretty straight forward)
-
- Just what theConcerned Amateurs group was seeking after certain people
- cheated their way onto "Council" in April (thereby causing all this
- legal mess.) No names of course, because that would be defamatory :-)
-
- >(ii) Resolve that the newly elected Council NOT be required to retire
- > until the Annual General Meeting in 1996.
-
- Fine, as long as none of the above-mentioned people get in again.
-
- Maybe then we can get back to the hobby, and those shortwave listeners
- (with callsigns) who've caused this mess will find some other way
- to occupy themselves..
-
- 73 de Richard VK2SKY
-
- ------------------------------
-
- Date: Thu, 11 Aug 1994 09:41:49
- From: ucsnews!newshub.sdsu.edu!nic-nac.CSU.net!charnel.ecst.csuchico.edu!yeshua.marcam.com!insosf1.infonet.net!news.i-link.com!news.sprintlink.net!indirect.com!s146.phxslip.indirect.@ihnp4.ucsd.edu
- Subject: W2NSD
- To: info-hams@ucsd.edu
-
- Just a quick reminder that Wayne Green, W2NSD, will be the special
- guest on the Ham Radio & More show this Sunday, 8/14/94. Wayne
- will discuss his background, his opinions, and more. The show can be
- heard on the Talk America Network in over 20 cities and via satellite on
- Spacenet 3, Transponder 9, 6.8 audio. It airs live at 6:00pm EST. Call
- 602-241-1510 for more information.
- If you cannot hear the show, but want to ask Wayne a question, call our
- listener call-in line at 1-800-298-talk around 6:00pm EST and you can be
- put on hold to hear the show until it's time to ask your question of Wayne.
- He'll also be on the local show the following hour at 1-800-293-kfnn.
- 73, Len, KB7LPW
-
- ------------------------------
-
- Date: (null)
- From: (null)
- Time and Frequency Station CHU (Canada)
-
- Information provided by Nick Sayer (mrapple@quack.sac.ca.us)
- CHU is a radio station in Canada that broadcasts time of day information
- sort of like WWV. CHU transmits on 3330 kHz, 7335 kHz, and 14670 kHz
- using AM compatable single-sideband full carrier modulation. Between 31
- and 39 seconds (inclusive) past the minute, CHU transmits a computer
- readable timecode. This timecode includes time of day UTC, day of year
- (1-366), Gregorian year, leap second warning, DUT (the difference
- between UTC and UT1, which is an astronomical timescale. The difference
- is an integral number of tenths of a second between -.9 and +.9. If the
- difference exceeds .7, they schedule a leap second), and a Canadian
- daylight time indicator.
-
- The datastream is in the form of an AFSK datastream. The frequencies are
- compatable with the Bell 103 standard: 2225 Hz mark and 2025 Hz space.
- The carrier is active between 10 and 510 msec past the second. Each byte
- of data is encoded as one start bit, 8 data bits and two stop bits.
- There are ten bytes in each packet, and the last stop bit ends at
- precisely 500 msec past the second. ( 1 start bit + 8 data bits + 2 stop
- bits ) 10 characters = 110 bits. Each bit takes 1/300 of a second (300
- baud). So the whole code takes 366.66.. msec. 500-366.66... = 133.33...
- msec. So graphically, each second looks like this:
-
- 000 050 100 150 200 250 300 350 400 450 500 550
- | | | | |
- ^ ^ ^ ^ ^
- 1 2 3 4 5
-
- 1 - Ticking noise.
- 2 - 2225 Hz mark tone for 123.333 msec to allow modems to set up
- 3 - Data stream
- 4 - 2225 Hz mark tone for 10 msec to avoid false overrun of the stop
- bits
- 5 - silence until the end of the second.
-
- The datastream itself consists of ten bytes. There are two possible
- formats at the moment: One for second 31 and the other for seconds 32
- through 39. Each format has 5 bytes of data, then 5 bytes of redundancy.
- The "A" format redundancy bytes are exactly the same as the data bytes.
- The "B" format redundancy bytes are exactly inverted (one's complement,
- NOT, XOR 0xff, etc) from the data bytes. This is how one can tell what
- sort of frame was received.
-
- Once the data is received and the redundancy bytes are checked, the next
- thing to do is to swap the least and most significant nibbles in each
- byte. After doing all of this, the frames look like this:
-
- A frame: 6d dd hh mm ss
-
- ddd is the day of the year. hh:mm:ss is the time UTC. 6 is a constant.
- Each nibble is a BCD digit.
-
- B frame: xd yy yy tt ab
-
- d is the absolute value of DUT in tenths of a second. yyyy is the
- gregorian year, tt is the difference between TAI and UTC, a is a flag
- indicating canadian daylight time (contents of this nibble are
- undocumented at the moment), b is a serial number (this nibble
- increments whenever the B frame is changed), and x is a bitwise field:
-
- 8 4 2 1
- | | | |
- | | | +--- The sign of DUT (0=+).
- | | +------ Leap second warning. One second will be added.
- | +--------- Leap second warning. One second will be subtracted.
- +------------ Even parity bit for this nibble.
-
- A sample A frame as received from the modem might look like this:
- 36 56 21 51 53 36 56 21 51 53
-
- Note that these numbers are in hex. This translates to the 365th day of
- the year (Dec 31, or Dec 30 in a leap year), 12:15:35 UTC.
-
- A sample B frame as received from the modem might look like this:
-
- 19 91 39 72 00 e6 6e c6 8d ff
-
- This translates to a DUT of -.1, year 1993, TAI-UTC=27, serial number 0
- and no canadian daylight time.
-
- ------------------------------
-
- Date: 11 Aug 1994 01:26:10 GMT
- From: ihnp4.ucsd.edu!swrinde!gatech!newsxfer.itd.umich.edu!zip.eecs.umich.edu!yeshua.marcam.com!news.kei.com!ssd.intel.com!chnews!scorpion.ch.intel.com!cmoore@network.ucsd.edu
- To: info-hams@ucsd.edu
-
- References <1994Aug10.103830.1@aspen.uml.edu>, <32bm8a$iu2@news.csus.edu>, <32bot3$45r@agate.berkeley.edu>.in
- Subject : Re: Which code learning method? Why?
-
- In article <32bot3$45r@agate.berkeley.edu>,
- Ken A. Nishimura <kennish@kabuki.EECS.Berkeley.EDU> wrote:
- >
- >If you learn code Farnsworth, you'll have a easier time upgrading.
-
- Hi Ken, I have a stupid question. Does anybody actually send Farnsworth-
- sounding code on the air? I've never heard it on the air and am wondering
- why learn sounds in a way that will not be encountered in operation?
-
- 73, Cecil, KG7BK, OOTC (Not speaking for Intel)
- --
- Intel, Corp.
- 5000 W. Chandler Blvd.
- Chandler, AZ 85226
-
- ------------------------------
-
- End of Info-Hams Digest V94 #908
- ******************************
-