Hi There I'm building my first K2 . everythings went fine untill alignment-
test part 11. 4 mhz cal. can't get the counter from changing rapidlyor showing
right numbers.The probe tested out ok. Anyone know of where to look first ?
Thanks Tim KD8DBO
It's irrelevant what the output of an amp is because it's a function of
gain.
Meaning if you want 100W output and you have a rig capable of producing
10W output then you need at least
a 10 to 1 ratio. The bread and butter of any transceiver is its
receiver. If you can't hear em, you can't
Hello to the group.
I am currently working through the Alignment and Test, Part II and
have run into the following issue. When I perform the BFO Test, I
don't get the proper range. The set of values I get are:
BFO High Freq.: 4917.31 kHz
BFO Low Freq.: 4916.97 kHz
Range: 0.34 kHz
The
Well,
I own a very good transceiver (IMHO at least; an Icom IC-781) permanently
connected to a vintage but outstanding Collins 30L-1 Linear Amplifier.
I have to say that i work only in CW. There i will have about 100W barefoot,
and about 400W if i switch on the 30L-1.
What i use for
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Help:
I saved this till last. I only have 2 caps left in my tray. On page 65 it says
that C22 is a 3.3 pf (3.3) in value.. I dont have that particular cap..but...on
page 1 of appendix A for the K2 RF board it says C22 is 2.7pf ( alt 3. or 3.3pf)
and its an NPO type.. The last cap i have is a real
Todd, that sounds like a noisy pot in which the wiper isn't making good
contact with the resistive element inside. When you touch it, the circuit
opens briefly, which is the same as turning the RF Gain all the way to
minimum. That will cause the S-meter to read full scale. The delay returning
to
Thanks Tom,
I suspect the gain pot is defective. I will check soldering also. I'll get
an RF gain pot on the way and try swapping it out also.
Todd
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Spraying the chemical onto/into a Q-tip and
then squeezing it out by pressing the cotton
against the upward-pointing shaft will avoid the
splattering.
73! Ken Kopp - K0PP (K2 #5665)
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or
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The lube is a good place to start Ron. Thanks. I have noticed that just
touching the RF knob causes this to happen so you are probably on to
something here. I don't have a lube other than tri-flow but will look for
something like what you mentioned. Todd
How interesting. My #1126 K2 does exactly as you described Todd. Although I
rarely change the rf control level, I've always wondered why my K2 behaved
this way. It'll be interesting to see what kind of comments your question
brings.
73,
Rod
K5BGB
Licensed June 1955
-Original Message-
I'm writing some rig control code for the K2 and came across this in the
KIO2 manual at the PA command:
Note: the preamp and attenuator can be turned on simultaneously under
computer control to provide four different RF gain levels.
Two variables each with two settings gives you four
K4ELV: You need to have a 3 pole plug on the straight key, even though only
the ground and tip are used. I am not sure about the menu issue. I fussed
with the two pole vs three pole plug issue myself, but it did no damage or
lasting troubles to the KX-1 when I was trying the two pole plug.
Mike -
I have seen rig control programs use the four combinations to simulate four
steps of volume control since the volume knob can't be changed by computer control.
73 de K1ESE
John
Mike Markowski wrote:
I'm writing some rig control code for the K2 and came across this in the
KIO2 manual
In the real world, there's not much advantage to using both the attenuator
and preamp together. The preamp offers about 14 dB gain. The attenuator
offers about 10 dB attenuation, so using both of them produces an effective
preamp gain of about 3 dB.
Since the purpose of the preamp is to provide
Yes, that is the one. There is one problem with a manual being too specific
about the appearance of a component, particularly capacitors. If the
capacitor manufacturer changes colors or the kit producer changes vendors
for a part for any reason, then the manual is no longer correct. In this
Assembly Part 1 complete
resistance checks completed
http://www.kc5wa.us/kx1/1727-05.jpg
infinity readings (although correct )
for banded end of D2 or D3 with
S1 on or off does not feel right?
RC kc5wa
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RC,
The resistance from the cathode of D2 or D3 to ground with S1 on will depend
a lot on your meter and the polorization of its leads. To convince yourself
all is OK, try the reading at the open contact of Sw (should be zero ohms,
then on the ends of R23 (one end shoudl be zero and the other
Can anyone explain terminology associated with the DSP unit. It's difficult
to know which way to begin adjusting individual areas of the DSP without
understanding. At least for me. I realize I could fiddle with them and
listen for change, but I'm not comfortable with that without a little
Can anyone explain terminology associated with the DSP unit...
1. soft filtering and standard filtering
Standard has steeper skirt selectivity.
2. Adjusting the Beta (aggressiveness) in the Denoiser
3. Adjusting the hold/decay time of the filter in Denoiser
4. The same in the
Folks,
I found a dizzying array of items on the web, from MP3 device
attachments to rather high quality exciters for neighborhood
broadcasting. Anybody have a suggestion or two for a decent quality
rig that couples to an MP3/CD-player, stereo...etc. Only need to get
the signal 50-100ft or so.
I think I have a receive problem. Just completed the last stage of the K2. I
have a 20M receiver that is pickin up ssb on 14.250 ish... nice and strong. The
K2 hears nothing. I have a MFJ-207 and I set it to generate a 14mhz signal and
the K2 can find that signal..but its sitting right next to
On Sun, 18 Feb 2007 15:19:28 -0800, Rod Ai7NN wrote:
I found a dizzying array of items on the web, from MP3 device
attachments to rather high quality exciters for neighborhood
broadcasting. Anybody have a suggestion or two for a decent quality
rig that couples to an MP3/CD-player, stereo...etc.
We don't have enough information to tell you where to look, it will take a
bit of troubleshooting just to discover where to start.
The first step is to see what part of the receiver is alive. Do you hear
any noise at all with the AF and RF Gains turned up all the way? If so,
there is something
Perhaps a (legal) wireless microphone would meet
the requirement. Radio Scrap sells them.
As Phil has already cautioned ... don't endanger your license!
73! Ken Kopp - K0PP
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Good evening Elecrafters, may your Monday be a restfull one!
I would like to send a low voltage limited current up the coax from my K2
to the antenna for powering a small device. What would be the best way to
inject this voltage into the antenna feed (coax) at the K2 and recovering
it up the
You need as a minimum a capacitor in the coax center lead to your K2 in
order to prevent DC from getting into the radio. Second you will need a
choke on your low voltage supply at a value that presents a large
impedance to RF frequencies you are operating on and therefore blocking
RF from
Hello again,
I've continued my troubleshooting efforts but the problem persists.
I had reflowed all connections except those of X3, so I removed L33
and R116 to do so. Everything appears to be well connected and I
don't see any shorts.
I checked the DC voltages on U11 using the
Craig,
The problem is most likely in one of the following areas:
1) The L33 inductor
2) The varactors
3) The crystals themselves.
The very most likely problem is a poor solder connection, and the second
most likely is misplaced components.
The DC voltages look to be within reason, and it is
Fellow Elecrafters:
I am trying to get 80 m QRP WAS with my K2. I have all states but
Alaska and Idaho. I was wondering if there are list members in either
state who would consider scheduling a contact with me.
73,
Steve
AA4AK
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when i ordered my k2, i also ordered the noise generator...
i ordered this to help align my k1 that i have been having problems
with.. on the k1, i am missing all sorts of signals that my cheapie
regen receiver is hitting loud and clear..
i am not sure what i am supposed to hear from the
while i have my k1 opened to the hilt.. i am thinking about making a few
more changes. i think i made a few bad judgment calls when first built
the radio..
i would like to:
change to the 80khz range..
change the edge of 18hmz to 18.1mhz..
i could probably backtrack and make the change,
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