Sequencer with CW memory keyer

Sequencer with CW memory keyer combines functionality of an automatic CW keyer, 4 channel sequencer and simple computer interface for PTT switching and CW manipulation.

Keyer features:

  • iambic keyer with one element memory
  • reversible paddle orientation
  • programmable dot/dash weight (from 1:2 to 1:4)
  • programmable auto character spacing (ACS)
  • programmable CW VOX function
  • 5 to 40 WPM front panel, adjustable keyer speed when keying from the paddle
  • 5 to 320 WPM keying speed for the memory keying
  • 4 memory channels up to 100 characters each

Sequencer features:

  • 4 channels
  • programmable delay (0..500 ms) and polarity
  • one channel (CH1) with relay output (DPDT relay) and 2A / 30V DC rating
  • three channels (CH2..CH4) with 30 mA / 30V DC solid state switch
  • absolute timings precision is ±3% at 25 °C and ±4% at -10..+60 °C
  • CW signal can be generated using the keyer, DTR or RTS line of the virtual COM port
  • TX/RX switching can be initiated by external PTT signal, internal memory keyer, DTR or RTS line of the virtual COM port

Documentation

https://vhfdesign.com/data/pdf/CW-Key-Sequencer-User-Manual.pdf

Software

Ver. 1.0 (Release date — 2018-11-29):
https://vhfdesign.com/data/zip/CWKeySeq-v1.0.zip
– Release version

 

Schematics

CW Key Sequencer schematics
Fig. 1 CW Key Sequencer schematics

 

Layout

CW Key Sequencer layout
Fig. 2 CW Key Sequencer layout

 

Connection example

CW Key Sequencer connection example
Fig. 3 CW Key Sequencer connection example

 

Specifications

  • Keyer speed: 5..40/3201 WPM
  • Dot / dash ratio: 1:2..1:4 with 0.25 dot step
  • Memory channels number: 4
  • Max channel text length: 100 characters
  • Sequencer channels number: 4
  • Sequencer signal delays: 0..500 ms, programmable with 1 ms step
  • Relay output (CH1): 2 A & 30 V DC
  • Solid state switch (CH2..CH4 and CW keying): 30 mA & 30 V DC
  • Timing precision: ±3% at 25°C, ±4% at -10..+60°C
  • Power supply voltage2: +8..15 V DC
  • Power supply current2: 0.1 A
  • Dimensions: 115 х 46 х 64 mm
  • Weight: 0.2 kg

KITs order: e-mail logo sales@vhfdesign.com
Technical support: e-mail logo ur3iqo@vhfdesign.com

Check the stock availability – here.
Request for an assembly – please fill out this form.

 

Appearance

CW Key Sequencer box appearance (front view)
Fig. 4.1 CW Key Sequencer box appearance (front view)
CW Key Sequencer box appearance (back view)
Fig. 4.2 CW Key Sequencer box appearance (back view)
CW Key Sequencer PCB appearance
Fig. 4.3 CW Key Sequencer PCB appearance

Leave a Comment