Probably no surprise, but I notice in the QRP Quarterly
17 out of 29 rigs listed in the Hootowl Sprint were Elecraft
12 out of 19 rigs listed in the milliWatt FD Results were Elecraft.
11 out of 15 rigs listed in the Homebrew Sprint were Elecraft
de Joe, aa4nn
I operated W3GS for the milliwatt FD as listed in QQ. We actually had
two nearly identical QRP K2s, one for CW and one for SSB. Hardly seems
fair using a K2 in a contest compared to other rigs. ;^)
Mark, NK8Q
K2 4786
Joe-aa4nn wrote:
Probably no surprise, but I notice in the QRP Quarterly
I'm trying an experiment to see if I can turn my ol' ICOM 735
into an imitation K2/100 - I'm using the new AF1 audio filter
with it and, yep, it makes a whale of a difference. I don't
actually know if it rivals the K2's receiver (since I don't own a
K2), but it really does sound as good as my
In the marine set I went to sea with, 2 x 10k 25W carbon resistors in
parallel were fitted as an antenna bleed. This was on the MF/HF set: all
valves in those days. Antenna was end fed inverted L and the tx was about
150W.
David
G3UNA
- Original Message -
From: Robert Johansen
Hi David,
Thank you for the info,
It is good to know how this problem was addressed on a ship board radio
installation.
I understand that when the bleeder resistor is at a high impedance point
in the antenna circuit it will need to dissipate power.
In a 50 Ohm circuit operating up to 100 W
On medium wave broadcast stations they fit quite large rf chokes across the
antenna terminals. I've seen some a foot long by 2 diameter. The self
resonant frequency (L plus self capacitance, in effect a parallel resonant
tuned circuit) is on the tx frequency, so they get low resistance to
The latest KPA-100 schematic (dated 9/25/06) shows R4 across the X1 crystal is
100K. A previous mod shows R4 was changed to 39K. My amp has been changed to
the 39K value. Which value is correct? Thanks. Roy Morris W4WFB
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Paul and others,
I didn't mean to imply the use of resistors on open-wire
feeders to drain off charges built up on the antenna. It
would work, but the resistance would mess up the
tuning of the antenna unless they were of very high
resistance, which would limit their effectiveness.
I have a
Anybody know of a Radio Shack microphone that will work with the K2.
My MH2 is getting reports of being muffled to the point that the audio
is not readable. Wondered if I could get an RS Mic as a quick
replacement. Not sure if this anything internal to the K2 or the Mic
100K is the correct value, as shown in the Rev D manual schematic.
With 39K the system normally works, but it causes some voltages within the
KPA100 to rise above that considered safe for some components.
Ron AC7AC
-Original Message-
The latest KPA-100 schematic (dated 9/25/06) shows
I looked for the mod that eliminates RFC10, but can't find it. I can see the
absence of the choke in the latest manual, but can't see what else changed.
Can anyone tell me the source for the mod. I am at that point in a KPA100
build and it would be good to know what changed and what the
Well, I finally bit the bullet and ordered a K2. Will be my largest
project since the Heathkit SB104A thirty years ago.
Is there any surprises that I should watch out for?
Thanks
Scott N5SM
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YES..
Beware strong addiction to solder fumes!
When the K2 are finished it is very likely that you buy a kx1 or a k1 ( or
both) :-)
73 de Tom LA1PHA
K2/100 #3829
K1 #1491
- Original Message -
From: [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Sunday, November 12, 2006 9:54
Hi Jim,
I ran accross it the other day as follows:
Click Order on the left side of the Elecraft home page;
Scroll down to Miscellaneous Parts and Upgrades or something like that
(I'm going by memory here) and click it;
Scroll down to the KPA100 section. If I remember rightly, the first
Heath did find modular construction -- at least in their TV sets. It
was great.
best wishes,
dave belsley, w1euy
On Nov 12, 2006, at 6:16 PM, Joseph Reed wrote:
You will have surprises in abundance. You will find the lack of
wiring amazing and wonder why Heath never discoverd modular
Jim, that's part of the KPA100 Upgrade Kit (Order KPA100UPKT). Do NOT simply
remove RFC10. It comes out as part of a comprehensive group of upgrades to
the KPA100 that largely interact, so you want to avoid doing only part of
the change.
The documentation is available under Manuals and Downloads
You might want to use the downloaded manual instead of the paper one
when you want to search for parts placement, using Adobe Reader.
Leigh/WA5ZNU
On Sun, 12 Nov 2006 12:55 pm, [EMAIL PROTECTED] wrote:
Well, I finally bit the bullet and ordered a K2. Will be my largest
project since the
TEN TEC has a nice $22 Mike, one of their standard
ham ones - that works nicely with the K2. And there
is a known K2 plug-pinout table available for it.
It's a mobile mike.
Fred
N3CSY
Want to start your own
Hi folks,
The power just went out. The forty meter net will be run from
batteries at a lower power. Hope to hear you all in about an hour.
Kevin. KD5ONSOn UPS power.
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You must be
On Sun, 12 Nov 2006, Kevin Rock wrote:
Hi folks,
The power just went out. The forty meter net will be run from batteries
at a lower power.
Ain't it amazing.and you didn't need any courses and/or federal funds to
make it happen.
73,Thom-k3hrn
www.zerobeat.net Home of QRP Web Ring,
I ordered my K2 before I joined this forum, and now that I did, I am
thinking maybe I shouldn't have ordered it. It hasn't been delivered
yet.
Is everyone having trouble with them as it sounds on this froum? Why
is it necessary for all the modifications that are being done to them?
What's all
Scott:
The troubles are few and far between. With over 5000 K2s out there,
mostly home built, occasionally things pop up. Dealing with those
rare occasions is one purpose of this list. Enjoy your K2. It is not
possible to find a better rig for the money.
73,
Steve Kercel
AA4AK
At 09:14
You're reading FAR too much into the content of the reflector!
This is a natural forum for those of us who are experimenters,
technically curious, the I can design it better types, etc.
Does a new radio you just ordered NEED modifications? No!
But there are folks who will make them in the
Because if you take your time assembling it, you will end up with a
transceiver that performs
Better than a $3K Japanese rig. The other rigs have their problems as well,
it is just that you don't
Hear about them, because they are problems that can't be corrected easily.
They just become part of
Hi Scott,
If you really don't like it, I shall take K2 from you at 80% of the
original price, hihi.
No, you have no need to worry. The modifications are for some limited
cases and some personal preference. I built K2 since s/n 1146 to s/n 4597.
Even the oldest one without any
I have a KDSP2 that I built last spring. It is currently installed in my K2
and works fine. I work mostly CW. After having both the KDSP2 and the KAF2
in my first K2, I would rather have the KAF2 for my operation. I would like
to sell the KDSP2 for $210 or trade it for a KAF2 plus the
Hi,
I am at the stage in building my K2 on page 60 in the VCO test.
Up to this stage all was well.
Now, with the probe _definitely_ connected to TP1. I get a reading of
all zeros.
Does anybody know the trouble-shooting procedure?
Thanks.
(I didn't do the calibration of C22, due to not having a
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