This simple “PIC- KEY” provides sending Morse Code
in two modes. First, that was written in the memory (four memory
cluster), second, with hand jambic manipulator.
Supply Voltage: +7... 17-Volts.
5... 7 mA.
Keying speed could be adjusted up to 400 WPM.
Capacity of each memory cluster up to 60 letters (depends
on the length of the letters and formatting the text).
Time of storage information in the memory- - more than
10 years (as specification on the Parts mentioned).
more than 100000 times (as specification on the Parts mentioned).
Ratio “dot- gap- dash” is 3 or 5 dots. Gap more then
5 dots is wrote 5-dots.
Used jambic mode A. (The
mode is mostly used in Russia).
Mike Kislinsky, RX9CBI
1 shows the schematic of Simple “PIC-KEY”
of the Parts.
DA1: 5V- stabilizer;
READ-ONLY Memory, capacity 2048 bits:
DA2: Clock generator for adjusting keying speed.
R14, C11: Set Clock frequency for the DD1 (near 400-500-kHz,
in the schematic WDT set in “OFF”).
VD1, VD2: Show mode of the key.
Tapping buttons S1… S4 turn on the reproduction of
the Data from Cluster.
Tapping of any buttons (at this case begin reproduction
from the taped button) or pressing the key do ending of reproduction
Holding buttons S1… S4 more the 1 second permits the
write to the Cluster.
Tapping any buttons does the end of the writing.
First variant of the key was not intended for high
speed, however, LZ2ZK (WITH MY LITTLE HELP) made increasing of
the speed up to 400-WPM (that is nice for meteoric QSO).