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N2CQ QRP CONTEST CALENDAR
September 2006
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Wake-Up! QRP Sprint (CW) *** QRP Contest ***
Sep 02, 0400z to 0600z
Rules: http://www.qrp.ru/sprint_e.htm
Geoffrey Mackenzie-Kennedy wrote:
Wayne Burdick [EMAIL PROTECTED] wrote:
There are potential issues with using any type of mixer besides the
present SA612 in the KX1.
First is PCB space. The present mixer, which requires nearly no
additional parts, barely fits. I seriously doubt that there
Folks:
Just received a query from a friend, asking how to VISUALLY identify
a NPO/C0G ceramic capacitor if it's in your junkbox.
I've heard that NPOs should have a colored band along their top edge,
but I've not been able to confirm this via any published info, of
from more than one
I love chasing the LEO satellites and am looking to make some
improvements to my station. I want to us my K2 for satellite ops on FO29
and VO 52. My plan is to add the 60 m / xvtr board to the rig and use a
145 and 435 MHz receive only converters ( I already have both) for the
down link. This
Hello,
I would like to ask a question. If you were buying a k2, what would
be the basic options you could not do without when buying the kit? Like
everyone, I am on a set budget but have enough for the rig plus a little
more. Wanted to get the most bang for the buck and also get the
It depends on whether you want to be CW only. If you are a phone op, then
definitely the K2SSB, but in order of importance to me I'd add the K160RX,
not only does it give you 160 meters, but a receive only antenna port. The
next would be the Noise Blanker, I couldn't live without mine.
None of them.
There are no options that I cannot do without. Stated another way, I'm
pretty happy with my K2 with no options. The only option in my K2 is
the AF and I currently have it switched off.
I don't run SSB and don't miss it.
I don't do computer control - no need for RS-232 I/O
I don't
Hi Mike,
It depends on what your interests are.
For CW QRP the basic K2 is plenty enough. The only other thing that is very
nice is the KAT2 tuner. If you don't have this you may need a separate
manual tuner.
For QRP SSB add the KSB2.
For 100 Watts you will need the KPA100. The KAT100 is
On 8/31/06, KU4YP [EMAIL PROTECTED] wrote:
I would like to ask a question. If you were buying a k2, what would
be the basic options you could not do without when buying the kit? Like
everyone, I am on a set budget but have enough for the rig plus a little
more. Wanted to get the most
Karl Larsen [EMAIL PROTECTED] wrote:
Yes. The LO has to beefed up from 400 mV into 2k-ohms to something else
yet to be determined since the LO has to switch the FETs on and off. The
space problem is caused by the transformer, and the gain problem is due to
the H-mode having a loss of gain
It's my understanding (and experience) that many ceramic NP0 caps have a
black band on the top. However, I don't believe that there are any
standardized markings, so YMMV.
73,
Jason Milldrum, NT7S
Tom Hammond wrote:
Folks:
Just received a query from a friend, asking how to VISUALLY identify
Hi Mike,
First of all, let me tell you I don't even have a K2.
That said, my advice for this (or anything else, for that matter), would be
What are you going to use the rig for? Are you a CW op only, or do you
really love operating SSB? Do you feel you will have fun without the 100W
Tom N0SS wrote:
Folks:
Just received a query from a friend, asking how to VISUALLY identify a
NPO/C0G ceramic capacitor if it's in your junkbox.
I've heard that NPOs should have a colored band along their top edge, but
I've not been able to confirm this via any published info, of from
Mike,
The only pitfall that I know about is that the K2 frequency cannot be
changed while transmitting. That is a problem for some installations, your
requiremnts may differ.
73,
Don W3FPR
-Original Message-
I love chasing the LEO satellites and am looking to make some
The only really necessary option is the finger dimple (plus a source of power)!
Bob W1SRB
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of KU4YP
Sent: Thursday, August 31, 2006 9:51 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] newbie question
Tom N0SS wrote:
Folks:
Just received a query from a friend, asking how to VISUALLY identify
a NPO/C0G ceramic capacitor if it's in your junkbox.
I've heard that NPOs should have a colored band along their top
edge, but I've not been able to confirm this via any published info,
of from
Oh, yes, I forgot about that. I do have one option on my K2 that I
can't live without.
An FT-100 knob!
73!
- Keith KD1E -
- K2 5411 -
-Original Message-
The only really necessary option is the finger dimple (plus a source of
power)!
Bob W1SRB
Sjoerd,
Your AGC symptoms sound similar to some of what I found wrong with s/n 3641
when I bought it used. You can find a lot of details in the elecraft
archive - (search for low audio on K2 s/n 3641).
Among other problems, I had a leaky C10 cap in the AGC circuit, upsetting
the AGC control
Looking ahead to a finished K2 with KSB2, what is a good inexpensive mike
that works well? I have a Kenwood TS50 and I could buy a second mike for it
and use the MC43 it has but those are not cheap. I noticed our local Radio
Shack/ham dealer has 1 $20 5 pin mike for Cobra CB use and I wonder
Geoff, GM4ESD, wrote:
A bonus when using a flip-flop is that it can be inhibited by
noise pulses coming from a noise receiver tuned outside of the band when
you want noise blanking without having to put a noise gate in the main
signal path which might compromise dynamic range, and the blanker
Hi All,
Please see http://www.pmel.org/HandBook/HBpage26.htm for info on capacitor
value, tolerance and TC data.
Good luck,
Bill
NA7Y
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Ron D'Eau Claire wrote:
An interesting idea for noise blanking, Geoff: turning the L.O. on and off.
But keying an oscillator like that always produces sidebands around the
oscillator frequency. That has its own issues when that oscillator is used
as an L.O.
Geoff is talking about keying a
Thanks to all who replied. I believe I will be sending off for the k2 with
the 160 meter, dimple and the noise blanker.
Thanks again and I'll post progress.
73 mike ku4yp
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Sjoerd,
When measuring millivolts some voltmeters are not very accurate. I've seen
them err as much as 40-50 percent. Compare two or three meters and see the
results. Also, some crystals don't put out a pure sine wave making RMS
measurements less acccurate. Look at it on an o'scope if one
Mike:
It depends on what you want to do with the rig. Since you style
yourself a newbie, you can likely do without the advanced features,
like the DSP. These are for more experienced operators trying to use
the rig in difficult conditions.
A beginner can do quite a lot with the basic rig.
Another option that I highly recommend.
Rework Eliminators.
This 3rd party kit enables you to build the K2 as if it has all the
options and provides simple jumper boards to populate the empty option
slots. Then, when you do build / add an option, you don't have to do
any rework to the board.
Don,
That's not really a problem, as I would use the K2 for receive
only. Transmit would be by the FT817, which is ok in transmit but lacks
on receive. So, with a couple of receive only converters in front of the
K2, should make an excellent satellite combo.
...Mike
Don Wilhelm wrote:
Hi all,
A friend gave me a Gamma LH-085 telecommunication headset. The headphone is
32 ohms. I found in K2 manual that it will work with almost any headphone.
So that part seems to be OK.
The microphone specs say it is Dynamic 19mm 200 ohms.
If I attempt at connecting this headset to the K2,
Ron, AC7AC, wrote:
An interesting idea for noise blanking, Geoff: turning the L.O. on and off.
But keying an oscillator like that always produces sidebands around the
oscillator frequency. That has its own issues when that oscillator is used
as an L.O.
I wasn't aware of any dynamic range issues
Jim, AB0UK wrote:
When measuring millivolts some voltmeters are not very accurate. I've seen
them err as much as 40-50 percent. Compare two or three meters and see the
results. Also, some crystals don't put out a pure sine wave making RMS
measurements less acccurate. Look at it on an
Vic, K2VCO wrote:
Geoff is talking about keying a flip-flop which is between the LO and
the mixer. It can be used to gate the LO signal (as well as to convert
the mixer signal to the 50% duty cycle square wave required for the type
of mixer that he recommends). He's not recommending keying
Thanks for the feedback, Geoff!
I can see, intuitively, an advantage of doing the switching in the more
predictable environment of the L.O. chain instead of the signal path with
who-knows-what coming along the bandpass and feeding relatively high-gain
amplifiers after it! Especially when you're
Hi all, I'm missing C48, a 330pF cap in the 10/12m bandpass. Elecraft has
one on the way but I'm anxious to try the transmitter. The receiver works
great and everything in part III is in except the missing cap. Is it OK to
go ahead and start transmitter tests and alignment and then complete
Bill,
Yes, just re-do the receiving and then the transmitting bandpass filter
alignment after you get the cap in hand. You should have to do nothing more
if you have completed all the other alignment steps.
73,
Don W3FPR
-Original Message-
Hi all, I'm missing C48, a 330pF cap in
Hello all,
I have for sale an HP 8640B Signal Generator with options 001 and 003.
There is a problem with the frequency counter readout, the range switch
needs
a new front wafer for the readout to work properly. I know it needs a
new wafer because
there is a connecting finger missing from the
I just tried Part III 40m alignment. When I tried TUNE I got a message that
said HIGH CURR, very tiny output and the current went 1.5 amps on lowest
setting. The finals heated up pretty quickly also. Can someone point me in
the right direction?
Thanks!
Hello
K2 #5713 has now been started and passed alignment and test Part One.
73 Bruce N9BX
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