Date: Sun, 30 Jan 94 08:38:50 PST
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 #91
To: Info-Hams
Info-Hams Digest Sun, 30 Jan 94 Volume 94 : Issue 91
Today's Topics:
ARRL DX Bulletin #7 - January 27, 1994
CW filters and DSP-9
CW filters and DSP-9 - morse1.jpg
Daily Summary of Solar Geophysical Activity for 27 January
FCC: Whats taking so long????
Frequencies for Animal Tracking ?
Got a callbook handy?
ham stuff
htx-202 or dj-162 ?
RAMSEY FX TRANSCEIVER
Sideband Technology Inc.
TF3CW QSL address
Your experiences on 40 meter CW QRP
Send Replies or notes for publication to: <Info-Hams@UCSD.Edu>
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Archives of past issues of the Info-Hams Digest are available
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We trust that readers are intelligent enough to realize that all text
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policies or positions of any party. Your mileage may vary. So there.
----------------------------------------------------------------------
Date: Fri, 28 Jan 1994 15:03:43 MST
From: library.ucla.edu!europa.eng.gtefsd.com!news.umbc.edu!eff!news.kei.com!yeshua.marcam.com!zip.eecs.umich.edu!destroyer!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu
Subject: ARRL DX Bulletin #7 - January 27, 1994
To: info-hams@ucsd.edu
ZCZC AE05
QST de W1AW
DX Bulletin 7 ARLD007
>From ARRL Headquarters
Newington CT January 27, 1994
To all radio amateurs
SB DX ARL ARLD007
ARLD007 DX news
The items in this week's bulletin are courtesy of Bob, W5KNE; QRZ
DX; Karl, PS7KM; Dennis, WB0WAO; Tedd, KB8NW; the Ohio/Penn and
Yankee Clipper Contest Club PacketCluster networks. Thanks.
PENGUIN ISLANDS LAST STAND? Ian, ZS9A, reports that Baldur, DJ6SI,
is attempting to activate ZS0 around February 24. And there are
rumblings that the Republic of South Africa may turn over both
Walvis Bay and Penguin Islands to Namibia at the end of February.
NETHERLANDS ANT
PJ2/OH1VR through February 2. Seppo is likely to be active in the
CQ WW 160 Meter CW Contest.
BANGLADESH. Eric, S21ZG, is on nearly every day between 3651 and
3653 kHz from 1145 to 1215z and 0000z.
EGYPT. Listen for SU2MT on 3793 kHz at 0500z.
CAYMAN ISLANDS. Vern, W8BLA, and Dick, K2UFT, are active on CW as
ZF1CQ. They will be there until January 31 and plan to operate in
the 160 Meter Contest. QSL via W8BLA.
SAINT LUCIA. Scott N9JCL, hopes to sign J6/N9JCL from January 28 to
February 2. Check 3795 Khz SSB or 3510 kHz CW at 0900z; 7003 kHz CW
at 1000z; and 14195 kHz SSB at 1200z.
OGASAWARA ISLANDS. Here's a DX-first. JA1LSY/JD1 will be operating
20 meter SST
FIJI. Shinji, JI3ACL, will sign 3D2CL on 40 through 10 meter CW and
SSB February 10 to 16. QSL via JI3ACL.
CQ WW 160 MET
W3HNK. VR2MH will be OH2BH/VR2BH and OH1NYP.
FRENCH POLYNESIA. Walter, DJ0FX, will work CW and SSB as FO0PT
through February 19. This will be an all-band effort.
ANTIGUA. John, AA2LW, is here on business, but operates 40 through
10 meter SSB as time allows. His favorite band is 17 meters.
SAINT CHRISTOPHER. Mike, W9NSZ, will sign V47NS on Nevis Island
from January 28 to February 2.
ANGUILLA. KK3K, WB6LYI, KC6XC, KI4ZN, W9BVD, KF7IK, AF9A and AI9Q
are planning a serious effort for March 5 through 10. They hope to
run all band all mode HF, and will be on OSCAR 13 Mode B and S.
TURKS AND CAICOS ISLANDS. K2TD, N2VW and WB2YOF should be active
through early February signing /VP5.
MEXICO. Rick, NE8Z, will operate from Puerto Vallarta as XE1/NE8Z
February 13 to 20 on all bands. He will be active in the ARRL CW DX
Contest. QSL via K8LJG.
ANTARCTICA. Brian, VP8CFM, is Base Commander at the British
Antarctic Survey Base. His duty tour is for 14 months and he will
be active as either VP8HAL or his own call. QSL via GM4KLO.
SAINT PET
approximately two weeks, starting about February 2. Plans are to
operate all HF bands plus OSCARs 10, 13 and 21. Satellite operator
tips are 145.890 MHz CW on OSCAR 10 and 145.925 MHz on OSCAR 13.
QSL PY0SK via PS7KM. QSL PY0SP via PT7AA.
NNNN
--
James J. Reisert Internet: reisert@wrksys.enet.dec.com
Digital Equipment Corp. UUCP: ...decwrl!wrksys.enet.dec.com!reisert
146 Main Street - MLO3-6/C9 Voice: 508-493-5747
Maynard, MA 01754 FAX: 508-493-0395
------------------------------
Date: 27 Jan 1994 18:22:30 GMT
From: nntp.ucsb.edu!library.ucla.edu!europa.eng.gtefsd.com!howland.reston.ans.net!cs.utexas.edu!swrinde!sgiblab!sgigate.sgi.com!olivea!news.bbn.com!news!levin@network.ucsd.edu
Subject: CW filters and DSP-9
To: info-hams@ucsd.edu
In article <2i3fsu$7lh@news.acns.nwu.edu> rdewan@casbah.acns.nwu.edu (Rajiv Dewan) writes:
If we broaden the definition of ringing to allow for noisy signals, of
the kind encountered on the low HF bands such as 80m, then there might
be more than one source of ringing:
. . .
2. Progressive coloration of background white noise as the filter
bandwidth is narrowed. . . .
You've nailed the head on the hit as far as I'm concerned, especially
on the low bands. As I narrow the digital filter (the built-in audio
filter on the Yaesu 990) to eliminate QRM the noise acquires a pitch
which obscures the tone I'm trying to distinguish. If only there were
some way (maybe there is! I'm no expert with using the RF gain
control, for instance) to desensitize the receiver to the noise without
desensitizing it to the weak CW signal.
/JBL
=
Nets: levin@bbn.com | "GO TO JAIL. Go directly to jail. Do not pass
POTS: (617)873-3463 | Go. Do not collect $200."
KD1ON (@KB4N.NH.USA) | -- Parker Brothers
------------------------------
Date: Sat, 29 Jan 1994 03:19:52 GMT
From: library.ucla.edu!agate!howland.reston.ans.net!usc!elroy.jpl.nasa.gov!newncar!destroyer!nntp.cs.ubc.ca!alberta!ve6mgs!mark@network.ucsd.edu
Subject: CW filters and DSP-9 - morse1.jpg
To: info-hams@ucsd.edu
me@next45.wsi.physik.tu-muenchen.de (Matthias Rosenberger) writes:
>According to the CW fiter discussion, I want to
>supply some calcualtions shown in two pictures in following postings
>based on a Fourier analysis of a morse signal of 10 times 'e':
>00000101010101010101010100000
Back to the drawing board, Matthias, 10 `e's is:
0001000100010001000100010001000100010001000
Enjoy, Ciao -- Mark
------------------------------
Date: Thu, 27 Jan 1994 21:27:57 MST
From: agate!howland.reston.ans.net!sol.ctr.columbia.edu!destroyer!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu
Subject: Daily Summary of Solar Geophysical Activity for 27 January
To: info-hams@ucsd.edu
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
DAILY SUMMARY OF SOLAR GEOPHYSICAL ACT
27 JANUARY, 1994
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
(Based In-Part On SESC Observational Data)
SOLAR AND GEOPHYSICAL ACT
-----------------------------------------------------------
!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 027, 01/27/94
10.7 FLUX=120.5 90-AVG=105 SSN=063 BKI=2443 3433 BAI=018
BGND-XRAY=B3.6 FLU1=9.9E+05 FLU10=9.8E+03 PKI=2343 3433 PAI=016
BOU-DEV=000,042,061,025,034,044,021,028 DEV-AVG=031 NT SWF=01:027
XRAY-MAX= M2.7 @ 0510UT XRAY-MIN= B3.3 @ 1245UT XRAY-AVG= C1.2
NEUTN-MAX= +002% @ 1505UT NEUTN-MIN= -003% @ 1135UT NEUTN-AVG= -0.2%
PCA-MAX= +0.1DB @ 2215UT PCA-MIN= -0.4DB @ 1915UT PCA-AVG= -0.0DB
BOUTF-MAX=55349NT @ 1402UT BOUTF-MIN=55319NT @ 1853UT BOUTF-AVG=55335NT
GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+062,+000,+000
GOES6-MAX=P:+136NT@ 1553UT GOES6-MIN=N:-087NT@ 0706UT G6-AVG=+083,+030,-029
FLUXFCST=STD:120,115,110;SESC:120,115,110 BAI/PAI-FCST=015,010,015/018,010,015
KFCST=3333 4433 2223 3322 27DAY-AP=018,022 27DAY-KP=1355 3322 3345 4322
WARNINGS=*SWF
ALERTS=**SWEEP:II=2@0401-0420UTC
!!END-DATA!!
NOTE: The Effective Sunspot Number for 26 JAN 94 was 56.0.
The Full Kp Indices for 26 JAN 94 are: 1+ 3o 5- 3- 4- 4- 3o 2+
SYNOPSIS OF ACT
--------------------
Solar activity was at moderate levels. A M2/1B flare
erupted from Region 7654 (N07W78) at 0510UT. An unassociated
Type II radio emission was detected at 0401UT.
Solar activity forecast: solar activity is expected to be
at low to moderate levels until Regions 7654 and 7658 (N11W53)
depart the disk.
The geomagnetic field has been at quiet to active levels
for the past 24 hours.
Geophysical activity forecast: the geomagnetic field is
expected to be at active levels through the remainder of the
27 January. Quiet to unsettled levels are expected for the
remainder of the forecast period.
Event probabilities 28 jan-30 jan
Class M 45/45/45
Class X 01/01/01
Proton 01/01/01
PCAF Green
Geomagnetic activity probabilities 28 jan-30 jan
A. Middle Latitudes
Active 20/10/20
Minor Storm 10/05/10
Major-Severe Storm 01/01/01
B. High Latitudes
Active 20/10/20
Minor Storm 10/05/10
Major-Severe Storm 01/01/01
HF propagation conditions were normal over the low and
middle latitudes. High and polar latitudes saw occasional
minor signal degradation during the local night hours due.
Near-normal propagation is expected over all regions during the
next 72 hours, particularly for the low and middle latitude
paths. High and polar latitudes should see gradual
improvements as well. Brief SWF activity is still expected at
times over daylit circuits during minor solar flare activity.
COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS
========================================================
REGIONS WIT
----------------------------------------------------------
NMBR LOCATION LO AREA Z LL NN MAG TYPE
7652 N04W93 224 0040 HSX 02 002 ALPHA
7654 N09W78 209 0490 DKI 07 006 BET
7658 N12W53 184 0130 DAO 09 009 BET
7661 N08W02 133 0070 DAO 04 006 BET
7659 S12W14 145 PLAGE
7660 S09E16 115 PLAGE
REGIONS DUE TO RET
NMBR LAT
7648 N07 024
7650 N05 012
7653 S05 011
LISTING OF SOLAR ENERGETIC EVENTS FOR 27 JANUARY, 1994
------------------------------------------------------
BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP
0341 0358 0409 7654 N08W68 C4.6 1N II
0456 0510 0531 7654 N11W65 M2.7 1B 51
POSSIBLE CORONAL MASS EJECTION EVENTS FOR 27 JANUARY, 1994
----------------------------------------------------------
BEGIN MAX END LOCATION TYPE SIZE DUR II IV
27/ 0401 0420 N08W68 RSP C4.6 28 2
27/ 0840 0932 1003 LDE C1.3 83
INFERRED CORONAL HOLES. LOCATIONS VALID AT 27/2400Z
---------------------------------------------------
ISOLATED HOLES AND POLAR EXT
EAST SOUTH WEST NORTH CAR TYPE POL AREA OBSN
58 N18W35 S20W53 S12W65 N30W43 188 ISO NEG 021 10830A
59 N56W03 N30W18 N68W43 N68W43 164 EXT
60 S05E32 S10E25 S10E25 N18E29 111 ISO NEG 002 10830A
SUMMARY OF FLARE EVENTS FOR THE PREVIOUS UTC DAY
------------------------------------------------
Date Begin Max End Xray Op Region Locn 2695 MHz 8800 MHz 15.4 GHz
------ ---- ---- ---- ---- -- ------ ------ --------- --------- ---------
26 Jan: 0019 0028 0033 C1.0
0054 0058 0103 C1.1
0107 0118 0124 C2.5 SF 7654 N07W50
0129 0136 0141 M1.5 1B 7654 N08W51 60 130 38
0150 0200 0208 C6.5 SF 7654 N07W50
0244 0247 0249 C1.0
0538 0541 0543 C1.4 SF 7654 N08W56 190 320
0611 0651 0657 C1.8 SF 7654 N07W56
0726 0733 0741 C1.3 62 25
0936 0939 0941 B7.3
1005 1011 1016 C1.0
1119 1142 1150 C4.6
1350 1359 1402 B5.9 SF 7658 N09W34
1552 1619 1624 C2.5 SF 7654 N10W61
1606 1607 1620 SF 7658 N11W35
1630 1633 1636 C1.9
1639 1642 1645 C3.7
1716 1721 1726 C1.3 SF 7654 N08W60
1849 1852 1854 C1.5 SF 7654 N09W62
2020 2025 2030 C1.0
2054 2058 2100 B7.2 SF 7654 N08W62
2117 2120 2122 B8.7 SF 7654 N09W63
2132 2137 2140 B8.6
2146 2146 2156 SF 7654 N09W64
2227 2237 2241 C1.6 SF 7654 N10W68
REGION FLARE STATISTICS FOR THE PREVIOUS UTC DAY
------------------------------------------------
C M X S 1 2 3 4 Total (%)
-- -- -- -- -- -- -- -- --- ------
Region 7654: 8 1 0 11 1 0 0 0 012 (48.0)
Region 7658: 0 0 0 2 0 0 0 0 002 ( 8.0)
Uncorrellated: 9 0 0 0 0 0 0 0 011 (44.0)
Total Events: 025 optical and x-ray.
EVENTS WIT
----------------------------------------------------------------
Date Begin Max End Xray Op Region Locn Sweeps/Optical Observations
------ ---- ---- ---- ---- -- ------ ------ ---------------------------
26 Jan: 0019 0028 0033 C1.0 III
0611 0651 0657 C1.8 SF 7654 N07W56 III
1552 1619 1624 C2.5 SF 7654 N10W61 III
1716 1721 1726 C1.3 SF 7654 N08W60 V
2117 2120 2122 B8.7 SF 7654 N09W63 III
2227 2237 2241 C1.6 SF 7654 N10W68 III
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: Thu, 27 Jan 1994 18:28:50 GMT
From: world!cravit@uunet.uu.net
Subject: FCC: Whats taking so long????
To: info-hams@ucsd.edu
In article <2i8ptc$27g@charm.magnus.acs.ohio-state.edu>,
William VanHorne <wvhorn@magnus.acs.ohio-state.edu> wrote:
>passed. Secondly, my license (Gen.) took 10 weeks and 5 days to arrive
>back in December.
My Technician license took 10 weeks and 3 days to arrive (I got it 2
weeks ago).
>Patience.
Concurred. It will come _eventually_. If it does not come within 90
days after the test date, call the ARRL VEC before you call the FCC.
They can verify when the FCC received the paperwork, and may advise
you to wait to call the FCC.
/Matthew N9VWG
--
Matthew Cravit, N9VWG | All opinions expressed here are
Michigan State University | my own. I don't speak for The World,
East Lansing, MI 48825 | and they don't speak for me (luckily
E-Mail: cravit@world.std.com | for both of us).
------------------------------
Date: 28 Jan 94 18:45:40 GMT+12
From: ucsnews!sol.ctr.columbia.edu!howland.reston.ans.net!wupost!waikato!comp.vuw.ac.nz!gcs.co.nz!amigans!home.amigans.gen.nz!halvey@network.ucsd.edu
Subject: Frequencies for Animal Tracking ?
To: info-hams@ucsd.edu
--
Does anyone out there happen to have a list of the bands used for tracking
animals fitted with radio collars. Preferably in New Zealand, but other
locations would also be of interest.
Thanks in advance.
--
Dave Halverson, Wanganui N.Z.
halvey@home.amigans.gen.nz
------------------------------
Date: 29 Jan 94 14:49:55 GMT
From: ogicse!qiclab!egreen!sitka.wednet.edu!connected.com!connected.com!jgates@network.ucsd.edu
Subject: Got a callbook handy?
To: info-hams@ucsd.edu
searanch@netcom.com (Robert C. Diefenbach) writes:
>I'm trying to locate an old pal, Barry Milburg, WD4DAA. He moved
>from Atlanta to New Jersey in 1988, and may have changed his call.
>But if someone would take a peek at a current call book and let
>me have a mailing address (assuming he didn't change his call),
>I'd appreciate it. Many thanks.
>73
>Rob Diefenbach
>WD4NEK
28 greenwood dr, millburn nj, 07041
--
John Gates, N7BTI, Edmonds, WA
206 774-3777
jgates@hebron.connected.com
CIS 72106,367
------------------------------
Date: 30 Jan 94 15:50:18 GMT
From: news-mail-gateway@ucsd.edu
Subject: ham stuff
To: info-hams@ucsd.edu
interested in following your email service. I am a ham of 20 years, (still
under 40!!) with variable interests throughtout the mode and frequency
spectrum Rick ve6gk.
------------------------------
Date: Thu, 27 Jan 1994 16:53:18 GMT
From: nntp.ucsb.edu!library.ucla.edu!europa.eng.gtefsd.com!howland.reston.ans.net!vixen.cso.uiuc.edu!sdd.hp.com!apollo.hp.com!hpwin052!hpqmoea!dstock@network.ucsd.edu
Subject: htx-202 or dj-162 ?
To: info-hams@ucsd.edu
Jerry Sy (ah301@yfn.ysu.edu) wrote:
: currently, I am leaning towards the dj-162 because of its wide
: receive.
: jerry
Wide receive is literal for all this class of radio, they tend to be
very prove to losing the ability to hear an Amateur band signal when
there are strong out-of band signals about. The only cure is having
tight filtering around the amateur band, and this precludes wide range
reception.
You'll not be far wrong if you think of them as a box containing 3
things:
1) a "scanner" with performance that places it at the cheap end of
the scanner market, and less frequency coverage than usual.
2) A reasonable quality amateur band transmitter.
3) An amateur band receiver with only the performance of a cheap
scanner, that is very susceptible to strong unwanted signals.
There are many people who have these and are delighted with them.
Possibly due to being in areas away from non-amateur transmitters, or
perhaps because they don't know what they've missed because they never
heard it....
The Tandy hand-held may now be the only amateur hand-held that has
not seriously compromised its performance as an amateur band radio.
I understand that some hand-helds now have computer game modes. Could
they have been included to give the user something to do while in areas
where blocking is frequent?
Ok, I've got strong opinions in this area, but if scanning was your
prime interest, you probably wouldn't have got a licence.
If you can't hear 'em, you can't work 'em. whoever said it first
is probably long dead, but it is still true. Also don't you just always
lose contact just at a critical point in a talk-in etc.
Cheers
David
------------------------------
Date: 28 Jan 94 17:17:43 GMT
From: ogicse!psgrain!research-01.mskcc.org!psinntp!psinntp!arrl.org!ehare@network.ucsd.edu
Subject: RAMSEY FX TRANSCEIVER
To: info-hams@ucsd.edu
Greg Bullough (greg@netcom.com) wrote:
: Steven has hit it on the head. As hams, we have for years said "can't
: afford a commercial rig? Home-brew or build a simple kit." Then
: QST and all the other magazines which bang this drum (which quite
: handily fills up magazine pages with circuits that few ever
: build) reap big advertising dollars from kit companies.
Greg,
For starters, I am not sure that few ever build projects from
magazines. Some of the authors that have offered a kit have reported
large sales -- to say nothing of those that either homebrew it
without a kit, or at least use part of the circuit as they build
something else. Go to any hamfest, note the rows upon rows of
vendors offering components. Hams are buying them, putting them
in bags and taking them home. They must be doing something with
the parts.
Even if hams don't actually build very many projects, they sure seem
to enjoy reading (or thinking ) about building them! All of the ham and
electronics magazines offer construction articles. I don't think I
would characterize printing articles that our readers like as "banging
a drum", but you may have meant something I just didn't understand.
Now, as for the big adverising dollars, I took a look at the February
QST issue. I counted two 1/8th-page ads, two 1/12th page ad and a 1/24th-
page ad, plus 4 ham ads, for companies offering kits. This is only
a small percentage of our total ad space; most of the ads are for
some form of ready-made product. Our editorial policy is not influenced
by our advertisers; it is determined by our perceptions of what
hams want to see. If the big advertisers were able to set our policy,
they would want us to run an article titled "Don't Build Your Own
Stuff -- Buy from QST Advertisers!" :-)
: As a hobby which has a tradition of mentoring ("elmering"), we are
: doing the Right Thing(TM) when we identify something like a Ramsey
: kit which is apt to blow a new ham's radio budget out the window
: while discouraging him or her, and leaving him without a working
: rig.
Our QST Product Review did indeed point out the problems we found
with the Ramsey FX-146. We also pointed out those things we like.
This ensures that QST reviews are complete and unbiased. People
who read these things are able to decide which things are important
and buy accordingly.
--
------------------------------
Date: Thu, 27 Jan 1994 17:35:08 GMT
From: nntp.ucsb.edu!library.ucla.edu!europa.eng.gtefsd.com!howland.reston.ans.net!cs.utexas.edu!utnut!nott!cunews!freenet.carleton.ca!FreeNet.Carleton.CA!ab376@network.ucsd.edu
Subject: Sideband Technology Inc.
To: info-hams@ucsd.edu
Recently liberated from our corp. lab, what appears to be a VHF
Transceiver. Rig was built by Sideband Technology Inc. of Scottsville
N.Y. Model number is the ACSB Pioneer 1000. Appears to be a 4 Channel
Xtal controlled with Xtals for 154.450 Mhz. Looks like a straight forward
VHF rig from the Main board, but underneath is another board chock full of
chips in what appears to be the audio section.
Anybody any info on these rigs? Would love a manual or even a schematic.
Regards
--
##############################################################################
Mike Ligeza Snr.- VE3UIL
Ottawa, Ontario
Canada
------------------------------
Date: 26 Jan 94 16:28:27 GMT
From: psinntp!psinntp!gdstech!gdstech!bat@rutgers.rutgers.edu
Subject: TF3CW QSL address
To: info-hams@ucsd.edu
I have a 1991 listing that says to use the TF buro.
--
*-----------------------------------------------------------*
* Pat Masterson D12-25 | KE2LJ@KC2FD *
* Grumman Data Systems | 516-346-6316. *
* Bethpage, NY 11746 | bat@gdstech.grumman.com *
------------------------------
Date: 30 Jan 1994 00:20:57 GMT
From: destroyer!news1.oakland.edu!vela.acs.oakland.edu!prvalko@uunet.uu.net
Subject: Your experiences on 40 meter CW QRP
To: info-hams@ucsd.edu
Andrew M. Cohn (andy@clark.net) wrote:
: If you work 40 meter CW, with 5 watts or less, and use less than ideal
: antennas (no beams, dipoles or rhombics, etc), I would like to hear about
: your experiences. No...I'm not writing a book; I just want to know what
: I can expect before investing in a QRP station!
Andy,
Why do you want to "invest in a QRP station!" ??? Getting into QRP is
something you generally do AFTER you've become bored with the typical
"fivenineQSLQRZ" contacts.
If you are just studying for a ham ticket, I HIGHLY recommend NOT to get
involved with a QRP radio as a first choice. Others disagree with me
but they are in the minority.
So wazzup???
73 =paul= wb8zjl
*** VANITY CALLS COMING SOON!!! I GOT DIBS ON K8T !!!!! ***
------------------------------
Date: 27 Jan 1994 10:29:59 +0200
From: mvb.saic.com!unogate!news.service.uci.edu!usc!howland.reston.ans.net!pipex!uknet!EU.net!news.funet.fi!butler.cc.tut.fi!lehtori.cc.tut.fi!not-for-mail@network.ucsd.edu
To: info-hams@ucsd.edu
References <2i44fb$e2h@news.acns.nwu.edu>, <2i66ll$m9t@vixen.cso.uiuc.edu>, <2i699h$6sc@news.acns.nwu.edu>k
Subject : Re: CW filters and DSP-9: A recap of mimimum bandwidth
Rajiv Dewan (rdewan@casbah.acns.nwu.edu) wrote:
> In the thread on minimum bandwidth required for CW signal:
[Estimates between 16 and 72 Hz arrived from different approaches]
This approach is based on the Modulation and Demodulation chapter in
the ARRL handbook.
The baud rate BR is defined as WPM / 1.2 and thus 20 WPM is about 16.7 Baud.
The bandwidth BW is define as K * BR. Both CCIR and FCC recomend K = 3
for non-fading circuits and K = 5 for (selectively) fading circuits.
Thus 20 WPM requires 50 Hz or 83 Hz if 5th harmonic is included.
In the same chapter, there is a graph with rise and fall time vs. maximum
speed and rise/fall time vs. required bandwidth. If 5 ms rise and fall
times are used (recomended by the ARRL) the maximum speed for non-fading
circuits is 60 WPM and 45 WPM for fading circuits.
At 5 ms rise/fall times the occupied bandwidth is about 150 Hz (-23 dB).
If we assume typical speeds (12-20 WPM), the transmitted spectrum is
dominated by frequency components from the rise/fall transition and not
from the information contents of the signal. Except for a relatively few
high speed operators, the rise/fall time recomendation could be increased,
which would reduce the occupied bandwidth.
Using receiver filters which are narrower than 150 Hz will increase the
post-detection rise/and fall times, but the impulse response of the
filter becomes more critical. At below 50 Hz and the third harmonic is
attenuated making aural reception very hard but machine reception of
20 WPM should be possible down to 17 Hz bandwidth.
Paul OH3LWR
--------------------------------------------------------------------
Phone : +358-31-213 3657
X.400 : G=Paul S=Keinanen O=Elisa-Tampere A=ELISA C=FI
Internet: Paul.Keinanen@Telebox.tele.fi
Telex : 58-100 1825 (ATTN: Keinanen Paul)
Mail : Hameenpuisto 42 A 26
FIN-33200 TAMPERE
FINLAND
------------------------------
Date: 29 Jan 1994 22:48:14 GMT
From: usc!howland.reston.ans.net!europa.eng.gtefsd.com!emory!news-feed-1.peachnet.edu!concert!inxs.concert.net!rock.concert.net!mikewood@network.ucsd.edu
To: info-hams@ucsd.edu
References <CKAu6K.4Hy@freenet.carleton.ca>, <2i9e52INNmf7@newsstand.cit.cornell.edu>, <n1gakCKCyrq.M4K@netcom.com>rt
Subject : Re: Sideband Technology Inc.
In article <n1gakCKCyrq.M4K@netcom.com>,
Scott Statton <n1gak@netcom.com> wrote:
>In article <2i9e52INNmf7@newsstand.cit.cornell.edu> F. Kevin Feeney <fkf1@cornell.edu> writes:
>>In article <CKAu6K.4Hy@freenet.carleton.ca> Mike Ligeza,
>>ab376@FreeNet.Carleton.CA writes:
>>>Transceiver. Rig was built by Sideband Technology Inc. of Scottsville
>>>N.Y. Model number is the ACSB Pioneer 1000. Appears to be a 4 Channel
>>>Xtal controlled with Xtals for 154.450 Mhz. Looks like a straight
>
This company was purchased by Aerotron , Inc a land mobile radio
manufacturer, around 1985. Aerotron is in Raleigh, NC and
continued to manufacture the units until a year or so ago.
Aerotron is in Bankruptcy and recently held an auction of
the remaining ACSB and land mobile stuff. The remnants of
Aerotron has been moved to Orlando, Florida to share facilities
with another near death company (Repco) owned by the same
Greek investor.
The radios have some very nice 9 Mhz xtal filters in them.
Mike Wood Internet: mikewood@rock.concert.net
The Signal Group
P.O. Box 1979 ***Avoid company disclaimers by owning the company ***
Wake Forest, NC 27588
Phone: 919-556-8477 Fax: 919-556-0115
>
>
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End of Info-Hams Digest V94 #91
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