[Elecraft] Re: Iambic A and B in K1

[Wayne Burdick]

ik2bcp - Guido Tedeschi wrote:

> It seems to me that the Iambic A is working in the same mode of Iambic B;
> this mode must be the clone of Curtis A mode but this is not true...

Hi Guido,

I just tested Iambic A and B modes and they do appear to functioning
correctly in firmware revision 1.09. An easy way to check the difference
between the two is as follows:

1. Set speed to the slowest possible (8 WPM).

2. Set power to zero by using the OUT menu entry. (A quick way to set
power to zero using this menu entry is to EDIT the parameter and leave
it unchanged, but hold DISPLAY to toggle to P=0.)

3. Select Iambic mode A using the IAB menu entry.

4. "Squeeze" the two keyer paddles together so that you get a repeating
"DIDAH". Now, release both paddles during the beginning of a dash. In
mode A, this will not generate an additional dot.

5. Switch to Iambic mode B.

6. Squeeze the paddles again, and release both paddles during the
beginning of a dash. An extra dot should be generated.

It is this extra dot on squeeze-release-during-dash that defines mode B.
It can make sending smoother for some people and impossible for others,
which is why we provide both modes. The exact moment at which the extra
dot is "latched" (acknolwedged) varies in different implementations. We
emulated two of the most popular implementations, Curtis mode A and
Super-CMOS II mode B.

Let me know if you still feel that A and B are same on your K1. I'll
need to know what revision of firmware you're using.

73,
Wayne