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Digital
Frequency Meter
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III Jcro_z
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• Monitors your " tra nsmitted " signal
• Measu res Khz and Mhz
• Operate s with a ny exc iter-t ransmi tter
11 to 600 watts- up to 30 Mh z)
• Larg e-brig h t " Nix ie" di splay
• 100 Hz Readou t
FM -6 Kit $139.50
Nlicro-Z CO .
Box 2426 Roll ing Hills. Calif. 90274
make sure the boxes containing th e CRT
and PMT are light-tight. Paint the insides
flat black and use feIt or foa m rubber to
fill in any gaps in th e wood joints.
Rem ember tha t in the monitor driven
sweep is employed. Therefo re, it will be
necessary to be receiving an SSTV pict ure
for a raster to be displayed. If a test tape is
needed you can send me or mos t other
hams on SSTV a 3 in. blan k tape with the
speed yo u wish it re corded at (3 and 3/4
ips usually) and I will re cord you som e
pictu res. (Also , if yo u require a tape of the
three audio tones I can recor d that for you,
but please incl ude return postage. ) I would
also like to hear fro m other hams building
SSTV or fast-sca n TV equ ipment. If an y
difficulti es in co ns tructi ng this equipment
are encounte red fee l free to write me.
I hope this art icle will help you get on
SSTV with as lit tle difficulty as possible. I
would like to thank Doug (WB2 UDF) and
Bob Beach (WB2WRX) for their sup port
on the project.
These deflection yokes are essennel/y identical even thou gh their configurations d iffer. The square
yoke is the older ty pe. The roun d one , relatively m ode rn, is manufactured for RCA.
I
F ig.6 . Phot omultiplier position ing and
system lay ou t.
optical
I
References:
1 Sources for CRTs:
Arcturus Electr onic Corp.
Fair Radio Sales Co.
United Radio Co.
2 Rad ar Sy stem Fundam en tals, T\111-46 7.
3 A Co m p act S lo w·Sca n TV Monitor,
MacDonald, QST, March 1964.
4 A S low-Scan Television P icture Gene rator,
Hutt on, 73, October 1967.
. __WB2Z IV ·
50
73 MA GA ZI NE