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SSTV Info - John Langner WB2OSZ
The main focus of this file is on SSTV because information on this mode
is so scarce. I keep trying to ignore WEFAX and ATV because they are
even larger topics already well covered by various handbooks and magazines.
However some WEFAX and ATV information sneaks in when it is closely related
to SSTV, for instance some software that does both SSTV and WEFAX.
I've tried to keep everything objective and resisted the temptation to
add comments (mine or second hand) about the quality of the products.
Someone flamed me for saying it was "sort of possible" to do SSTV
with a certain multi-mode TNC. So all I'll say is get on the air and
ask people what they are using how they like it.
Detailed specifications and prices have been avoided because that could
be considered advertising and this is going over the Internet and other
places where advertising is not welcome.
Please send additions and corrections to johnl@avs.com and I'll distribute
a new version occasionally.
A fairly recent version will always be available in
/pub/ham-radio/sstv_wefax_info at ftp.cs.buffalo.edu.
Let me know where you saw this file; I'd be interested in knowing how
far it gets propagated.
Version of mid October 1992.
Background
----------
There are several different ways to send images over ham radio:
1. RTTY art - Remember when people were amused by making pictures
out of characters?
2. FSTV (Fast Scan TV - Also called ATV) - Similar to broadcast TV.
Full motion, color, sound, etc. Restricted to UHF and up because
a signal requires several MHz of bandwidth.
3. WEFAX (weather facsimile) - Very high resolution gray scale images
sent by audio tones over a period of minutes.
4. SSTV (Slow Scan TV) - Low to medium resolution still images sent
through audio channels over a period of several seconds to a few
minutes. Mostly color these days.
5. Digital SSTV - I haven't seen any proposals yet. You could always
compress images using an international standard, such as JPEG, and
send the files over existing packet radio networks.
Transmission Modes
------------------
The original 8 second SSTV transmission mode (around 1958) had the following
characteristics:
black = 1500 Hz
white = 2300 Hz
gray levels in between
120 scan lines
15 lines per second
5 mS of 1200 Hz for horizontal sync
30 mS of 1200 Hz for vertical sync
Since that time many more modes have been invented, sometimes to add new
capabilities, sometimes the result of Not Invented Here syndrome.
The major groups are:
Robot - Introduced with the Robot scan converters (California).
Wraase - Introduced with the Wraase scan converters (Germany).
Martin - Developed by Martin Emmerson (England).
First available as replacement PROMs for Robot 1200C.
Scottie - Developed by Eddie Murphy (Scotland).
First available as replacement PROMs for Robot 1200C.
AVT - Developed by Ben Blish/Williams (Montana).
First available in the AVT system.
The Robot, Wraase, Martin, and Scottie modes are all closely related.
They all use the tones above for black, white, and gray levels.
They all have 1200 Hz horizontal sync, although some Martin and Scottie
implementations rely on accurate crystal oscillators and ignore the
horizontal sync once synchronized. Color is generally transmitted by sending
each scan line 3 times, once each for red, green, and blue components.
Robot is different from the rest in that it encodes colors with
luminance (Y) and chrominance (R-Y and B-Y) instead of R,G,B.
Each of these modes has a few different speeds, usually providing 120 or 240
scan lines and varying degrees of horizontal resolution. (Actually some send
128 or 256 lines but the top 8 or 16 are always a fixed gray scale,
leaving 120 or 240 usable lines.)
The Robot modes have a much longer vertical sync (called VIS) containing
7 bits of information and a parity bit. This identifies the format of the
following image so manual selection is not required on systems that
recognize it. Everyone else has adopted the Robot VIS coding and assigned
themselves unused codes in the original specification.
The AVT mode is radically different from the rest. It has no horizontal
sync at all; very accurate crystal oscillators are required to prevent
slanted pictures. After the usual Robot VIS code, it has a digital header
with 32 repetitions of the transmission mode, and a sequence number. It is
only necessary to receive one of the 32 groups correctly to achieve
synchronization. For more details see the AVT article in CQ-TV mentioned
in the bibliography.
Frequencies
-----------
By convention, SSTV operation is generally found on only a few frequencies.
>From a brochure from the International Visual Communication Association:
3.845
7.171
14.230
14.233
21.340
28.680
144.5
Nets
----
Two different Slow Scan nets meet on Saturdays at 15:00 and 18:00 UTC
on 14.230 MHz.
Scan Converters
---------------
A couple years ago anyone who was serious about SSTV had a Robot 1200C.
It is a complete system dedicated to SSTV. Just connect it to
- Color TV camera (either NTSC or PAL).
- Color TV set or monitor.
- Speaker and Mic connectors of a transceiver.
- Tape recorder for picture storage.
It has 4 black & white modes (one compatible with original 8 second) and
4 color modes with different transmission times and resolutions.
It displays images with 256 x 240 resolution with 18 bits per pixel.
That's more than 250,000 colors.
Robot Research
5636 Ruffin Road
San Diego, CA 61927
It also has a parallel port for connection to a home computer. Several
different programs for transferring images to/from the 1200C and for
performing various other functions are available.
(Combined list from Roland's column, IVCA brochure, etc.)
Hi-Res (for IBM PC)
Tom Jenkins N9AMR
5968 S. Keystone Ave.
Indianapolis, IN 46227
SCAN, Version 6.0 (for IBM PC)
Bert Beyt W5ZR
301 Tampico St.
New Iberia, LA 70560
SSTV by KC5VC (for IBM PC)
Garnet Bebermeyer WB0UNB
15 Almeda Ct.
Fenton, MO 63026
IMAGE (for IBM PC)
Dick Isely WD9GIG
736 Fellow St.
St. Charles, IL 60174
name? (for Amiga)
Tom Hibben KB9MC
Mule Hollow Road
Box 188
DeSoto, WI 54624
Replacement PROMs are available to give the 1200C other transmission modes
such as Wraase, Martin, Scottie, and AVT. PROMs available from:
Martin Emmerson G3OQD
6 Mount Hurst Rd.
Hayes, Bromley
Kent, England
Robot Research has lost interest in the 1200C. It hasn't been enhanced
or advertised for years. The last I heard it is still available from P.C.
Electronics but they never mention it in their full page ads (need to dig
up address...).
Three clones of the 1200C are available:
Ribbit
Brian Summers VE3DUO
336 Goodram Drive
Burlington, Ontario
Canada L7L 2K1
LM9000
John Wilson VK3LM
R.M.B. 4201A
Tallangatta Valley 3701
Victoria Australia
NS-88
Muneki Yamafuzi JF3GOH
P.O. Box 670
Osaka Japan 531
I think the LM9000 is available only as blank PC boards. One magazine
article warned readers not to be too hasty about purchasing boards because
the other parts required are hard to find and more expensive than you
would expect. But if you do build one it is compatible with the 1200C and
can use the Martin Emmerson PROMs.
The Wraase SC-1 and SC-2 scan converters are available from Germany.
I know nothing at all about their capabilities. One magazine mentioned that
they existed but went into no additional detail.
Volker Wraase Elektronik
Kronsberg 10
D-2300 Altenholz/Kiel
Germany
Tel.: 0431/32528
A new scan converter was just announced recently, the SUPERSCAN 2001. It
is similar to the 1200C but a more modern design with several improvements.
It can hold four 256x256 images with about 250,000 colors. New features
include mouse support, titling without use of a separate computer, both
parallel and serial interfaces, and a CMOS RAM with battery backup to
save parameters.
Now (or soon) available are:
* Semi-kit with 3 printed circuit boards, an EPROM developed
by Martin Emmerson, and instructions.
* High stability crystal oscillator.
* Cabinet.
* Interface card for IBM PC.
The builder must gather up all the other components which go on the boards.
Jad Bashour
55 Hampton Road
London N15 3SX
England
Tel. 011 44 81 (809 3991)
Home Computers
--------------
Now that most home computers have plenty of memory and acceptable color
graphics, the most cost effective method is to use a computer with a
suitable interface and software.
Note that if you want to send a picture of anything real, you will also
need a frame grabber which will add a few hundred more $ to the total
system cost.
Amiga
-----
The AVT system has become quite popular during the last couple years for
both SSTV and WEFAX. It is composed of an interface that attaches to the
parallel port and software.
It has images with up to 4096 colors, all the popular transmission modes,
builtin graphics editor, text generation, image processing techniques to
clean up noisy pictures, and loads of other features. Product review
in July 1989 issue of 73 Amateur Radio.
AVT Master
AEA
P.O. Box C2160
2006 196th St. S.W.
Lynnwood, WA 98036-0918
Atari ST
--------
Color SSTV, WEFAX, and other ham radio software are available from these
user group program libraries:
Atari Microcomputer Network
John Adams KC5FW
17106 Happy Hollow
San Antonio, TX 78232
ASTUR (Atari ST Users on Radio)
GEERAERT Michel
W. Elsschotlann 21
B-8460 Koksijde
Belgium
The WEFAX program requires a very simple interface containing an XR-2211.
The "sSTv" program can use two different interfaces.
In the low cost configuration, the internal sound generator is used for
transmit and a simple two chip interface (total cost about $7 including
perf board, connectors, etc.) is used for receive.
Much better results can be obtained with an interface from:
A&A Engineering
2521 W. LaPalma, Unit K
Anaheim CA 92801
(714) 952-2114
See 73 Magazine, December 89 and January 90, for more details.
The latest version of the software has all the popular modes (Robot,
Wraase, Martin, Scottie, AVT), a graphical user interface, on-screen
tuning indicator, and full screen images with dithering to give the
appearance of hundreds of colors when viewed from a distance.
Another Atari SSTV system is available from:
Robert Gendron VE2BNC
315 6025 Croissant Brodeur
Brossard, Longueuil
Quebec J4Z 1Y8
Canada
IBM PC
------
Several WEFAX systems are available:
PC HF Facsimilie 4.0
PC GOES/WEFAX
Software Systems Consulting
150 Avenida Cabrillo, "C"
San Clemente, CA 92672
MULTIFAX
Schwittek WEFAX Systems
David E. Schittek NW2T
1659 Waterford Road
Walworth, NY 14568
AEA-FAX
AEA (address above)
A & A Engineering
(address above)
There are surely others. I found these by flipping through a couple
recent magazines. My current main interest is SSTV so I'm not familiar with
the features of WEFAX systems.
Several months ago, I started this paragraph with "The SSTV picture is
dimmer" because there was only a limited B&W system available.
The situation has changed rapidly. There are now three PC-based Color
SSTV systems available and rumors of at least one more on the way.
In order of appearance:
ViewPort VGA (developed by KA2PYJ)
A & A Engineering
(address above)
PC SSTV 5.0
Software Systems Consulting
(address above)
Pasokon TV
John Langner WB2OSZ
115 Stedman St. #F
Chelmsford, MA 01824-1823
(please send SASE for details)
All systems use much different interfaces: a small module that plugs into
the serial port, a more substantial interface that attaches to the printer
port, and a board that fits into an expansion slot inside the computer.
All send/receive a variety of modes, read/write popular image file formats,
and require a VGA. But there the similarities end. They vary quite a bit
in number of transmission modes supported, maximum number of colors displayed,
ease of setup, and other features.
To avoid any unpleasant surprizes, tune into 14.230, and ask people about
their experiences with the different systems before making any decisions
about a purchase.
Mac
---
Many people have asked many times and there doesn't seem to be anything
available.
Others
------
There have been SSTV implementations for other machines such as the Radio
Shack COCO and the old 8 bit Ataris. (See Bibliography, below.) CQ-TV also
mentions SSTV for machines we never heard of in the USA.
Multi-mode TNCs
---------------
It is possible to do color SSTV with the MFJ-1278, a computer, and suitable
software.
John (??? callbook says Robert E.) Tuttle K1UTI
Penny Ln
Barrington, NH 03825
Software Avaiable by FTP over Internet
--------------------------------------
If you don't have Internet access, consult the FAQ list for information
on how to get these files by e-mail.
SSTVFAX2.ZIP Hams: Send and Receive SSTV and FAX pictures
JVFAX50.ZIP very good program to encode and decode FAX/SSTV/ASCII..
WEFAX.ARC ?
NEWWEFAX.ARC ?
AUTOFAX.LZH ?
FAX40.LZH ?
(Most of the jvfax50.zip locations from VE2IMS. Others from archie.)
Host capella.eetech.mcgill.ca
Location: /wuarchive/mirrors/msdos/hamradio
FILE -rw-r--r-- 407934 Jun 28 20:00 jvfax50.zip
Location: /wuarchive/mirrors3/garbo.uwasa.fi/ham
FILE -r--r--r-- 408165 Jun 24 13:41 jvfax50.zip
Host garbo.uwasa.fi
Location: /pc/ham
FILE -rw-rw-r-- 408165 Jun 24 17:41 jvfax50.zip
Host isfs.kuis.kyoto-u.ac.jp
Location: /mirrors/simtel20.msdos/hamradio
FILE -rw-rw-r-- 407934 Jun 29 05:00 jvfax50.zip
Host nic.switch.ch
Location: /mirror/msdos/hamradio
FILE -rw-rw-r-- 407934 Jun 28 22:00 jvfax50.zip
Host pc.usl.edu
Location: /pub/ham
FILE -rw-r--r-- 407934 Jul 2 11:24 jvfax50.zip
Host plaza.aarnet.edu.au
Location: /micros/pc/garbo/pc/ham
FILE -r--r--r-- 408165 Jun 24 17:41 jvfax50.zip
Location: /micros/pc/oak/hamradio
FILE -r--r--r-- 407934 Jun 28 20:00 jvfax50.zip
Location: /micros/pc/simtel-20/hamradio
FILE -r--r--r-- 407934 Jun 28 20:00 jvfax50.zip
Host rigel.acs.oakland.edu
Location: /pub/msdos/hamradio
FILE -rw-r--r-- 407934 Jun 28 20:00 jvfax50.zip
Host src.doc.ic.ac.uk
Location: /ibmpc/wsmr-simtel20.army.mil/hamradio
FILE -r--r--r-- 407934 Jun 28 21:00 jvfax50.zip
Host sun0.urz.uni-heidelberg.de
Location: /pub/msdos/simtel/hamradio
FILE -rw-rw-r-- 407934 Jun 28 20:00 jvfax50.zip
Host swdsrv.edvz.univie.ac.at
Location: /pc/dos/hamradio
FILE -rw-r--r-- 407934 Jun 28 19:00 jvfax50.zip
Host wuarchive.wustl.edu
Location: /mirrors/msdos/hamradio
FILE -rw-r--r-- 407934 Jun 28 19:00 jvfax50.zip
Location: /mirrors3/garbo.uwasa.fi/ham
FILE -r--r--r-- 408165 Jun 24 12:41 jvfax50.zip
Host garfield.catt.ncsu.edu (152.1.43.23)
Last updated 06:01 9 Jul 1992
Location: /pub/hamradio/programs
FILE rw-r--r-- 28323 Jun 18 12:00 sstvfax2.zip
Host wuarchive.wustl.edu (128.252.135.4)
Last updated 04:16 10 May 1992
Location: /mirrors/msdos/hamradio
FILE rw-rw-r-- 28323 Apr 30 19:00 sstvfax2.zip
Host gdr.bath.ac.uk (138.38.32.1)
Last updated 07:03 9 Jul 1992
Location: /pdsoft/msdos/hamradio
FILE rw-r--r-- 35968 Sep 7 1987 wefax.arc
Host garfield.catt.ncsu.edu (152.1.43.23)
Last updated 06:01 9 Jul 1992
Location: /pub/hamradio/programs
FILE rw-r--r-- 35968 Jun 18 12:01 wefax.arc
Host caticsuf.cati.csufresno.edu (129.8.100.15)
Last updated 03:48 22 Jun 1992
Location: /pub/ham-radio/radio/progs
FILE rw-r--r-- 35968 Nov 12 1991 wefax.arc
Host wuarchive.wustl.edu (128.252.135.4)
Last updated 04:16 10 May 1992
Location: /mirrors/msdos/hamradio
FILE rw-rw-r-- 35968 Sep 6 1987 wefax.arc
Host ucsd.edu (128.54.16.1)
Last updated 03:39 8 May 1992
Location: /hamradio/dsp
FILE r--r--r-- 41110 Aug 10 1988 wefax.arc
Host sun0.urz.uni-heidelberg.de (129.206.100.126)
Last updated 17:54 5 May 1992
Location: /pub/msdos/simtel/hamradio
FILE rw-rw-r-- 35968 Sep 6 1987 wefax.arc
Host src.doc.ic.ac.uk (146.169.2.1)
Last updated 17:24 5 May 1992
Location: /ibmpc/wsmr-simtel20.army.mil/hamradio
FILE r-xr-xr-x 35968 Sep 6 1987 wefax.arc
Host rigel.acs.oakland.edu (141.210.10.117)
Last updated 16:46 5 May 1992
Location: /pub/msdos/hamradio
FILE rw-r--r-- 35968 Sep 6 1987 wefax.arc
Host plaza.aarnet.edu.au (139.130.4.6)
Last updated 16:16 5 May 1992
Location: /micros/pc/simtel-20/hamradio
FILE rw-r--r-- 35968 Sep 6 1987 wefax.arc
Location: /micros/pc/oak/hamradio
FILE rw-r--r-- 35968 Sep 6 1987 wefax.arc
Host nic.funet.fi (128.214.6.100)
Last updated 15:36 5 May 1992
Location: /pub/ham/dsp/dsp4
FILE rw-rw-r-- 41110 Mar 1 1990 wefax.arc
Host ucsd.edu (128.54.16.1)
Last updated 03:39 8 May 1992
Location: /hamradio/dsp
FILE r--r--r-- 70742 Aug 10 1988 newwefax.arc
Host nic.funet.fi (128.214.6.100)
Last updated 15:36 5 May 1992
Location: /pub/ham/dsp/dsp12
FILE rw-rw-r-- 70742 Mar 1 1990 newwefax.arc
Location: /pub/msdos/communications/hamradio
FILE rw-r--r-- 10500 Sep 21 1990 autofax.lzh
FILE rw-r--r-- 202198 Jan 16 09:22 fax40.lzh
Host garfield.catt.ncsu.edu (152.1.43.23)
Last updated 06:01 9 Jul 1992
Location: /pub/hamradio/programs
FILE rw-r--r-- 208740 Jun 18 11:56 fax40.zip
Host wuarchive.wustl.edu (128.252.135.4)
Last updated 04:16 10 May 1992
Location: /mirrors/msdos/hamradio
FILE rw-rw-r-- 208740 Jan 10 18:00 fax40.zip
Host sun0.urz.uni-heidelberg.de (129.206.100.126)
Last updated 17:54 5 May 1992
Location: /pub/msdos/simtel/hamradio
FILE rw-rw-r-- 208768 Jan 11 12:00 fax40.zip
Host src.doc.ic.ac.uk (146.169.2.1)
Last updated 17:24 5 May 1992
Location: /ibmpc/wsmr-simtel20.army.mil/hamradio
FILE r--r--r-- 208740 Jan 10 19:00 fax40.zip
Host rigel.acs.oakland.edu (141.210.10.117)
Last updated 16:46 5 May 1992
Location: /pub/msdos/hamradio
FILE rw-r--r-- 208740 Jan 10 19:00 fax40.zip
Host plaza.aarnet.edu.au (139.130.4.6)
Last updated 16:16 5 May 1992
Location: /micros/pc/simtel-20/hamradio
FILE rw-r--r-- 208740 Jan 10 19:00 fax40.zip
Location: /micros/pc/oak/hamradio
FILE rw-r--r-- 208740 Jan 10 19:00 fax40.zip
Host nic.funet.fi (128.214.6.100)
Last updated 15:36 5 May 1992
Location: /pub/msdos/communications/hamradio
FILE rw-r--r-- 208740 Jan 16 07:36 fax40.zip
FILE rw-r--r-- 30628 Sep 21 1990 wefax.lzh
Host garfield.catt.ncsu.edu (152.1.43.23)
Last updated 06:01 9 Jul 1992
Location: /pub/hamradio/programs
FILE rw-r--r-- 28323 Jun 18 12:00 sstvfax2.zip
Host wuarchive.wustl.edu (128.252.135.4)
Last updated 04:16 10 May 1992
Location: /mirrors/msdos/hamradio
FILE rw-rw-r-- 28323 Apr 30 19:00 sstvfax2.zip
Host garbo.uwasa.fi (128.214.87.1)
Last updated 05:54 9 Jul 1992
Location: /pc/ham
FILE rw-rw-r-- 408165 Jun 24 17:41 jvfax50.zip
Software Available from phone BBSs
----------------------------------
???
Publications
------------
Modern information on SSTV is very scarce. The only SSTV handbook, that I
know about, was written by Don Miller W9NTP and Ralph Taggart WB8DQT about
15 years ago.
The British Amateur Television Club has a book, The Slow Scan Companion (?),
but it's not really a handbook with organized chapters on different topics.
It's more like a random collection of magazine articles. It is missing
very fundamental information such as how color images are conveyed by
audio tones.
There are a few magazines that specialize in Amateur Television. These are
mostly oriented toward fast scan TV but SSTV and WEFAX are mentioned
occasionally.
(Regular column on 'Satellites, Facsimile & Slow-Scan TV
Imaging' by Fred Sharp W8ASF)
The SPEC-COM Journal
P.O. Box 1002
Dubuque, IA 52004-1002
(Frequent column 'SSTV Revisited' by Roland Humphries G4UKL)
CQ-TV
British Amateur Television Club
Dave Lawton G0ANO
Grenehurst, Pinewood Road
High Wycombe, Bucks HP12 4DD
England
(U.S. subscriptions may be obtained by making payment
through Wyman Research or ATVQ.)
Amateur Television Quarterly (ATVQ)
1545 Lee St.
Suite 73
Des Plaines, IL 60018
Booklets of old ATVQ and A5 articles are available from:
ESF Copy Service
4011 Clearview Dr.
Cedar Falls, IA 50613
A newsletter devoted to SSTV:
VISION
International Visual Communication Association (IVCA)
101 Oenoke Lane
New Canaan, CT 06840
The 1993 ARRL Radio Amateur's Handbook will have a completely new and
expanded section on SSTV. It's not out yet because this is the middle
of 1992.
Bibliography
------------
It will take some time to track down more old articles for this section.
But it won't take long to type them in because there aren't many!
I've purposely excluded the scores of articles describing modifications
to the Robot 400 (an old Black & White only system) because they're all
in the booklets from ESF and of little interest to someone without a
Robot 400.
Abrams, Clay K6AEP & Taggart, Ralph WB8DQT, "Color Computer SSTV", 73,
Nov 84, p. 10 & Dec 84, p. 18.
Cameroni, Giuseppe I2CAB & Morellato, Giancarla I2AED (translated by
Jim Grubbs K9EI), "get on SSTV - with the C-64", ham radio, Oct. 86, p 43.
Churchfield, Terry K3HKR, "Amiga AVT System", 73 Amateur Radio, Jul 89, p. 29.
Goodman, Dick WA3USG, "SSTV with the Robot 1200C Scan Converter and the
Martin Emmerson EPROM Version 4.0", 73 Amateur Radio Today, Jul 91, p. 46.
Langner, John WB2OSZ, "Color SSTV for the Atari ST", 73 Amateur Radio,
Dec 89, p. 38, Jan 90, p. 41.
Langner, John WB2OSZ, "SSTV - The AVT System Secrets Revealed", CQ-TV 149
(Feb 90), p. 79.
Montalbano, John KA2PYJ, "The ViewPort VGA Color SSTV System", 73, Aug 92,
p. 8.
Rogers, Buck K4ABT (???) - I heard that the August (?) 92 issue of CQ had
a product review of PC SSTV 5.0 but the next issue was already out by the
time I had a chance to make a trip to a big book store.
Schick, Martin K. KA4IWG, "Color SSTV and the Atari Computer", QST, Aug 85.
Taggart. Dr. Ralph E. WB8DQT, "The Romscanner", QST, Mar 86. p. 21.
ARRL Bibliography on Image Communications
-----------------------------------------
The following was provided by Ed Hare at ARRL:
The ARRL Handbook and the Operating Manual each have a chapter devoted to
amateur television. These books are available from ARRL Headquarters or
your local amateur dealer.
There are two periodicals devoted to amateur television:
ATV Quarterly
1545 Lee St
Suite 73
Des Plaines IL 60018
SPEC-COM
POB 1002
Dubuque IA 52004-1002
Contact these publishers directly for susbscription information.
ARRL Bibliography on Image Communications:
1925
May Visible Radio Communication p. 15
(Wilkerson) 4 pages
July Television Arrives p. 9
(Bidwell) 6 pages
Picture Transmission Permitted p. 37
(Experimenters' Section) 2 pages
August Jenkins Experimenters p. 59
1 page
November Henkins Machine p. 59
(Hints & Kinks) 1 page
December Practical Picture Transmission p. 12
(Dewhirst) 6 pages
1926
January Voss (German) System p. 29
2 pages
1927
November Weather Map Transmission and p. 9
Reception 7 pages
(Dewhirst)
1928
May Amateur Television p. 17
(Thomsen) 2 pages
August Some More about Amateur Television p. 30
(Westman) 2 pages
September Radiovision p. 15
(Dewhirst) 4 pages
Synchronism p. 30
(Jenkins) 1 page
October Amateur Television Waves p. 8
1 page
1929
March What Price Television p. 48
(Sleeper) 3 pages
June Photo-Electric Cells & Methods p. 17
of Coupling to Vacuum Tubes 6 pages
(Dewhirst)
1937
December Radio Amateurs in the Television p. 8
Picture 4 pages
(Lamb)
December Introduction to Modern Television p. 11
(Wilder) 6 pages
1938
January Circuit Elements in Modern p. 31
Television Reception 5 pages
(Wilder)
February Sweep Circuit Considerations in p. 38
the Television Receiver 5 pages
(Wilder)
March A Universal Test Unit for the Study p. 37
of Television Images 3 pages
(Wilder)
April Construction of Television Receivers p. 23
Part I 5 pages
(Wilder)
May Construction of Television Receivers p. 39
Part II 4 pages
(Wilder)
October Building Television Receivers with p. 21
Standard Cathode-Ray Tubes 5 pages
(Sherman)
December A Practical Television Receiver for p. 21
the Amateur 6 pages
(Shumard)
1939
January Construction and Alignment of the p. 45
Television Receiver 9 pages
(Shumard)
February Using Electro-Magnetic Deflection p. 40
Cathode-Ray Tubes in the Television 6 pages
Receiver
(Sherman)
March An Electrostatic-Deflection p. 52
Kinescope Unit for the Television 4 pages
Receiver
(Sherman)
1940
February A Deflection and Video Chassis for p. 29
Television Reception 3 pages
(Lawrence)
March A Design for Living -- With p. 44
Television 4 pages
(Rosenblatt)
May A New Electronic Television p. 30
Transmitting System for the Amateur 7 pages
(Sherman)
June A Receiver for the New Amateur p. 38
Television System 6 pages
(Sherman)
July An Efficient U.H.F. Unit for the p. 32
Amateur Television Transmitter 5 pages
(Waller)
October Television Camera-Modulator Design p. 11
for Practical Amateur Operation 13 pages
(Lamb)
Simplifying Television Defection and p. 74
Video Chassis 1 page
(Experimenters Section)
November Two-Way Television Communication p. 36
Inaugurated 3 pages
December New Amateur Television Records p. 53
on 112 Mc. 1 page
1944
May Television in K6 Land p. 42
(Souza) 3 pages
December Video Amplifier Design p. 24
(Merritt) 5 pages
1945
November Extended Range Television Reception p. 18
(Wilder) 6 pages
1946
March Military Television Cameras -- and p. 41
the Amateur 4 pages
(Middleton)
June I.F. Amplifiers in Television p. 62
Receivers 4 pages
(Kronenberg)
1950
June Amateur Television -- A Progress p. 11
Report 5 pages
(Tilton)
1953
November An Amateur Television Camera p. 10
(Keller) 6 pages
1958
August A Narrow-Band Image Transmission p. 11
System, Part I 7 pages
(Macdonald)
September A Narrow-Band Image Transmission p. 31
System, Part II 7 pages
(Macdonald)
1960
March First Amateur Transatlantic Picture p. 75
Transmission 1 page
April Slow-Scan Image Transmission p. 36
(Macdonald) 5 pages
May Slow-Scan Tests Coming Up p. 52
(Macdonald) (TC) 2 pages
September Amateur Color Transmission p. 13
(Shadbolt) 3 pages
1961
January S.C.F.M. -- Improved System for p. 28
Slow-Scan Image Transmission Part I 5 pages
(Macdonald)
February S.C.F.M. -- Improved System for p. 32
Slow-Scan Image Transmission Part II 4 pages
(Macdonald)
August League Seeks "Slow-Scan TV" p. 63
(Happenings) 2 pages
1962
November Amateur TV -- The Easy Way p. 33
(Cambell) 10 pages
1964
March A Compact Slow-Scan TV Monitor p. 43
(Macdonald) 6 pages
1965
February Slow-Scan Via OSCAR III p. 20
(Miller) 1 page
June A Slow-Scan Vidicon Camera Part I: p. 11
Performance and Electrical Design 5 pages
(Macdonald)
July A Slow-Scan Vidicon Camera Part II: p. 15
Mechanical Design 4 pages
(Macdonald)
August A Slow-Scan Vidicon Camera Part III: p. 24
Setup and Operating Procedures 3 pages
(McDonald)
1966
September Twenty-Meter Slow-Scan Tests p. 38
(Report on pictures) 1 page
(Macdonald)
October Narrow-Band TV Using Pseudo-Random p. 46
Dot Scan 2 pages
(Simpson) (TC) (Also see 1/67 TC)
1967
January Pseudo-Random Scanning p. 47
(Macdonald) (TC) 1 page
February First Slow-Scan Pictures From p. 77
Antarctica! 1 page
November Slow-Scan TV Proposed p. 78
(Happenings) 2 pages
1968
February ARRL Comments on Slow-Scan TV p. 72
(Happenings) 3 pages
September Slow-Scan TV Pictures Exchanged p. 71
Between Canada and Sweden 1 page
Slow-Scan in the U.S. and Canada p. 80
(Happenings) 1 page
Slow-Scan Report p. 84
(FCC Report and Order) 3 pages
December Slow-Scan with Regular Vidicons p. 48
(Refers to 1965 series) 1 page
(Taggart) (TC)
1969
May U.S.-Europe Two-Way Slow-Scan TV QSO p. 75
(Taggart) 1 page
1970
June Slow-Scan TV Viewing Adapter for p. 46
Oscilloscopes 5 pages
(Briles & Gervenack) (Also see 3/72,
p. 56 TC)
1971
March A Solid State SSTV Monitor p. 35
(Tschannen) (Feedback 8/71, p.41) 5 pages
November Robot Research Model 70 SSTV p. 48
Monitor and Model 80 Camera 4 pages
(Recent Equipment)
1972
January What You Always Wanted to Know p. 61
About SSTV 5 pages
(Hastings)
March More On The SSTV Viewing Adaptor p. 56
For Oscilloscopes 1 page
(Refers to 6/70 articles)
(Briles & Gervenack) (TC)
July A Storage-Tube Monitor for SSTV p. 34
(Smith) 3 pages
September Questions and Their Answers on the p. 56
Solid-State SSTV Monitor 2 pages
(Tschannen) (TC) (Refers to 3/71)
December ATV with Motorola T44 UHF p. 28
Transmitter, Part I 5 pages*
(McLeod)
1973
January SSTV Video Inversion and Short Scan p. 42
(Stavrou) (TC) 2 pages
February ATV with Motorola T44 UHF p. 36
Transmitter, Part II 8 pages*
(McLeod)
March A Solid-State SSTV Monitor -- p. 27
Mark II 7 pages
(Tschannen) (Feedback 5/73, p. 40)
August SSTV Calling Frequencies p. 47
(Macdonald) (TC) 2 pages
October A Tuner for ATV Applications p. 34
(Bertini) 3 pages*
1974
April Venue Slo-Scan TV Monitor p. 46
(Recent Equipment) 2 pages
(Feedback 5/73, p. 64)
July A Character Generator for ATV p. 11
(Ellison) 8 pages
1975 January Practical Ideas for the ATV p. 11
Enthusiast, Part I 5 pages*
(O'Hara)
February Practical Ideas for the ATV p. 30
Enthusiast, Part II 7 pages*
(O'Hara)
March SSTV to Fact-Scan Converter, Part I p. 33
(Steber) 8 pages
May Slow-Scan to Fast-Scan Converter, p. 28
Part II 10 pages
(Steber)
_____
* Condensed in Specialized Communications Techniques for the Radio
Amateur
July A Crystal-Controlled SSTV Sync p. 22
System 5 pages
(Tschannen)
November TV Backdrop p. 42
(H&K) 1 page
December A Tuning Aid for SSTV p. 38
(Hall) 3 pages
1976
May 450 MHz ATV Repeaters p. 45
(FM Repeater News) 1 page
November SSTV Image Processing p. 13
(Steber) 4 pages
1977
February Using Still-Camera Lenses on SSTV p. 44
Cameras 1 page
(H&K)
1978 April QST p. 22
Go ATV with This Transceiver 5 pages
October QST p. 30
Medium-Scan Television -- A New Frontier
October QST p. 25
SSTV Pictures from Your Microcomputer
1980 January QST p. 36
The Microprocessor and Slow-Scan
Television
(Feedback: Feb., p. 17)
February QST p. 27
Medium-Scan Television Update
November QST p. 11
SSTV in Colour
1981 January QST p. 11
Low-Cost Conversion of the Robot 5 pages
400 to Color
June QST p. 11
All About Amateur Television 4 pages
(Feedback: Sept 1981, p. 51)
1982 March QST p. 59
FAX and TV Permitted in Additional
Frequency Bands
June QST p. 15
A Compatible Slow-Scan Color
Television System
August QST p. 24
Care and Feeding of Linear 5 pages
Amplifiers for ATV
December QST p. 53
PAL SSTV? (color SSTV compatibility)
1983 June QST p. 11
SSTV Today
August QST p. 11
High-Resolution SSTV
1984 April QST p. 44
Computerized ATV
1985 August QST p. 13
Color SSTV and the Atari Computer 4 pages
QST p. 25
The VIP: A VIC Image Processor 7 pages
QST p. 32
The ATV'ers Amazing Little Grey Box 2 pages
December QST p. 14
In Search of the Perfect Picture 4 pages
1986 January QST p. 18
In Search of the Perfect Picture 7 pages
March QST p. 21
The ROM Scanner (SSTV) 7 pages
Summary
-------
Most people are scared away from trying SSTV because they think it HAS TO
be expensive. That WAS true but it's not anymore. With 3 or 4 new color
SSTV systems for use with the IBM PC, 1992 will be the year that SSTV
really takes off.
The members and HQ staff would like to thank the following people for
their contributions to this information file:
John Langner WB2OSZ
Send any additional information or changes to mtracy@arrl.org.
73 from ARRL HQ.