Iambic Keyer IC MK1
© 1997-2001 Michael Keller, DL6iAK
VERSION 1: Speedtuning with paddle
VERSION 2: Analog speedtuning with potentiometer and softener
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Functionality:
- IAMBIC Keyer
- only version 1: dash/dot-weighting 1:3, 1:4 (jumper)
- only version 1: dash/dot-memory (can be switched off, jumper)
- simple speedtuning with paddle (version 1) or by potentiometer (version 2)
- only version 1: fast speedtoggling between four preinstalled speeds (60,90,120,150)
- less pieces, small size (keyer-IC, 3 resistants, 1 transistor, 1 key, max. 2-3 C's)
- current intensity: min. ca. 1 uA, max. ca. 0.5 mA
- four preinstalled calls (normal, portable, dx, qrp, test)
- autorepeat
- only version 2: Softener
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Manual:
Tune up
Hold the dot paddle until you hear a continuous tone. The rig will now be in transmit, allowing
you to do any necessary tuning (aerial matching unit etc). Touching the dash paddle will
interrupt. Speed (only version 1)
Hold the dot paddle until you hear a continuous tone. While still holding the dot paddle, touch
the dash paddle and the keying speed will increase. Touch it again, and the keying speed will
decrease. Toggle speed (only version 1)
Pushing the memory button while the dot paddle is pushed will let you toggle between preset
60/90/120/150 BpM. Memory
Pushing the memory button will send one of these five messages:
| cq cq cq de call call call k |
| cq cq cq de call/p call/p call/p k |
| cq cq cq dx de call call call dx k |
| cq cq cq de call/qrp call/qrp call/qrp k |
| cq test de call call k |
Pushing the memory button while a message is playing lets you step through the
messages, letting you select the one you need. The keyer responds with 'N', 'P', 'X', 'Q' or 'T' -
depending on which you have selected. The message will repeat after 6 or 7 seconds, unless you
interrupt it by pushing either paddle.
Important: If you don't want a slash between the call and qrp (UK) please make a notice
when ordering. Dash/dot ratio (only version 1)
Setting jumper one changes the ratio to 4:1. Dash/dot memory (only version 1)
Setting jumper two will disable the dot/dash memory. The keyer will then not respond to a keyed
dot while a dash is in progress (and vice versa). Softener (only version 2)
This feature was suggested by Hans, DF3OS. The dot will be time extended by 7-15 ms, the dash/dot
pause shortened in the same ratio. This will lead to a hearable better tone quality and a better
readability at higher speeds (>120 BpM). The effect will take place from 100 BpM up.
| Costs: |
| Version 1: |
6 US$ (6 €) plus shipping |
| Version 2: |
7 US$ (7 €) plus shipping |
Don't forget your callsign and the version number (1 or 2) at
ordering.
© 1997-2001 Michael Keller
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