After reading the posts on this list a couple of months ago about the
ultimatic keyer mode, I threw together a couple of simple prototypes
that go between the paddle and keyer to convert an iambic keyer to
ultimatic. Either a pair of quad nor gates or a PIC do the job. A write
up and the circuits
Dear Ron,
My experience is that all radios depreciate in constant dollars with time.
So another way of storage, that is almost certainly more economical,
would be to sell your K2. That money plus the interest earned will likely
buy a better rig, for example a used K3, when and if you decide to
Dear Koert,
It probably isn't the problem, but you might check that the core
used for T4 is really an FT50-43. The wrong core might not have enough
permeability at the lower frequencies.
73 Kevin w9cf
Dear all,
Please find my emails to Elecraft support below. Is there maybe somebody with
but it is not the correct sequence of dots and
dashes. N3FJP shows a transistor interface in the help section. However, I
am using the two diodes shown in Figure 8-1. Can anyone help me solve this
problem?
73,
Dave Kent
K0TCP
=-
Kevin Schmidt, [EMAIL
As long as you back down the power appropriately I think you will be fine.
However, your amplifier would work better if you put, for example,
a pi network at the input. This will give a low impedance path for the
second and higher harmonic energy in the input circuit and improve the
efficiency.
I think this is the known feature described by Wayne in:
http://www.ac6rm.net/mailarchive/html/elecraft-list/2000-03/msg01007.html
73 Kevin w9cf
My K2 also produces clicks on 40m which disappear if the antenna
is disconnected or turned away from strong BC stations above 7100
kHz. Running CAL
I have been trying to use the computer control for my K2/100. I am using the
RS232 port on the KPA100. I cannot seem to ever get any response except
KY0; to the KY; command. If I send a KY; immediately after
KY 123456789012345678901234;
while the K2 is still sending the first character, it should
That was very helpful. Thanks and 73
Kevin w9cf
On Tue, Jan 23, 2007 at 09:52:57PM -0800, Jack Brindle wrote:
Kevin;
This tends to be a confusing command to many people. I have found
that using the extended response format provides better information
than the basic response, allowing
=-
Kevin Schmidt, [EMAIL PROTECTED], http://fermi.la.asu.edu/w9cf
Department of Physics
Arizona State University, Tempe, AZ 85287-1504
(480) 965-8240 Fax: (480) 965-7954
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Adam,
The K2 PLL Ref Upgrade manual gives some information on typical drift i.e.
5 to 20 Hz per 15 degrees F on 20 meters. It also explains how changing RA
on the thermistor board can better compensate for the drift. Since your
drift is consistent, I think you should be able to reduce it by
Don,
I agree about warm up drift. Perhaps I misunderstood Adam, but I
thought that his problem was that even during normal usage he found
objectionable drift when he operated his KPA100 for a while. I presume,
perhaps wrongly, that this is most likely coming from the PLL since I
thought that the
My daughter and I are slowly assembling a KPA100 Rev C. We are at the
alignment and installation resistance checks, and the bases of Q1 and Q2
measure 11.4 ohms. The manual gives 12-16 ohms. Looking at the schematic,
it seems that the resistance for Q2 base should be the resistance of R9
(10
of the ssb board es all parts are
in proper places es no cold solder joint or bridges. Problem is
with ssb brd. could my problem be a faulty (intermittent) IC ???
Any sugestions appreciated. tnx, Gregg WB8LZG
=-
Kevin Schmidt
Don Wilhelm [EMAIL PROTECTED] wrote:
The real problem is due to contact bounce at the key contacts. The firmware
cannot detect the closure on both the dot and dash lines at the same time,
but when one is detected, the other is checked to see if it is closed too -
now if the contacts are bouncing,
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