Vectronics VEC-221K - Manual (Page 24)

VEC-221K Instruction Manual CW Memory Keyer Kit
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jack should be attached to J3 to monitor the CW sidetone. Adjust potentiometer
R8 (sidetone level) to a comfortable listening level.
Factory defaults status: As soon as power is supplied and the VEC-221K
turned on by depressing Power switch SW5, the unit is ready for operation. A
microprocessor program “subroutine” loads several operating parameters into
the keyer at power up. These parameters are the same as the last time you turn
the unit off, many of them may be changed to suit your preferences—more on
this later. Commands entered via the Function switch are stored in non-volatile
memory.
At factory default settings, the keyer assumes standard paddle wiring, that is dit
key to tip and dah key to the ring of the 3.5 mm jack. Iambic operation is set to
mode “A”. The sidetone frequency is set to 701 Hz. The CW weight is set to
50%, the standard 1:3 dit to dah ratio. The keyer is in the automatic mode.
If CW operation is a new experience for you, consider running the keyer in its
basic default configuration until you become comfortable with its feel and
operation. Feel free to learn the more advanced features at your own pace.
Factory default settings after the self-test:
1. 701 Hz sidetone
2. Standard weight (50%, dot-dash-space ratio of 1:3:1)
3. Iambic
A
4. Automatic
5. Standard paddle wiring (dot = tip, dash = ring)
6. Serial number = 0001
7. Leading zeros sent as "O" (dah-dah-dah)
8. Other zeros sent as "0" (dah-dah-dah-dah-dah)
9. Nines sent as "9" (dah-dah-dah-dah-dit)
Transmitter keying: The keyer output is through RCA phono jack J2. You will
need a cable to connect between the keyer and the CW keying jack of your radio.
The operation instructions for your set should show what sort of connector is
needed and its location on your radio. Many modern transceivers use RCA
phono jacks for connecting accessories, in those cases ready-made cables for
home entertainment devices may be used between the VEC-221K and radio.
Keyer output specs: The keyer is designed for positive keying output. Most
modern solid-state transceivers and QRP transmitters meet this requirement.
Always check the owner’s manual before attaching the keyer to a radio. The
VEC-221K will key positive voltages to 50 Vdc maximum. Keying current is
limited to 100 mA maximum. Exceeding these limits may damage keying
transistor Q1.