On Thu, 2007-01-11 at 16:31 -0500, John Huffman wrote:
> Hi Don -
>
> I have only had this rig for a couple of weeks and am trying to use the
> internal
> keyer to minimize the number of 'boxes' i have on the desk. I have gotten
> used
> to the timing or the internal keyer and seldom use memories anyway, so the
> only
> thing I would like to improve is the speed control.
>
> Mine also covers 15-30 in two marks. That's a little touchy for my taste.
> The
> total travel of the knob looks to be about 270 degrees, but for me only 55
> degrees are useful. Even a two turn pot would be a big help.
>
> I've emailed Ten Tec and Paul replied, "The pot sends information to the DSP
> and
> the DSP controls the keyer speed, can not change the value. The keyer is
> only a
> program in the processor chip." I'm not sure he understood my question so I
> asked again for the value of the pot. I haven't received a reply.
>
> If I give up, I will go back to my CMOS II keyer. Mine is HB and is a little
> rough, but that Idiom Press chip is still a beauty.
>
> 73 de K1ESE
> John
>
Unless the "pot" is a digital encoder you surely can adjust end point
and range with a resistor in series with the pot and another in shunt
with the pot. To set the series resistor, wire it in and run the panel
put to full speed. Adjust the series resistor for the maximum speed you
want. Then set the panel pot to the low speed end and adjust the shunt
resistor for the slow speed you want. The range may not be really linear
but it should be spread out. Its possible that the panel pot gets set at
the lowest resistance for the lowest speed, then the external resistors
would be adjusted for the opposite range ends.
One of the things I've always liked about a good straight key, is that I
only need to adjust me, not also a keyer when changing speed to
accommodate a contact.
73, Jerry, K0CQ
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