Steve,
You present a mystery. There is nothing that I can think of or see in the
schematic that would cause the VFO to be stuck on only one band. The VFO
lock is not something that is remembered across bands.
Is there any chance that the K2 is going into transmit on 20 meters? If so,
the K2 wi
Joe:
If you've worked 300+ with a loaded vertical, I tip my hat to you.
While 100 countries on 80m with 100 watts and a loaded vertical is
likely doable, I agree with you, it would be a notable feat.
73,
Steve
AA4AK
At 06:38 PM 3/8/2006, Joseph Reed wrote:
Stephen,
I live in a very ante
I am selling the following on behalf of W4LJD, a retired engineer who is
getting out of ham radio:
Elecraft K1 #00422
Internal antenna tuner
4 band module for 40, 30, 20, 15
Noise blanker
Has some sort of add-on, flip-down, single leg stand on the front, which
does not appear to be a current Elecr
Well, finally got home from the Cactus Intertie Annual Meeting. Kevin
was much stronger on 20 from Lake Havasu City than here in N. Cal. I
was at the pool at the Hampton Inn with my KX1 @ 1.7W (6 half-dead AA's
... I really need to prepare better for these events). 26' strung over
the umbrellas
Very interesting.
What IMD values would you consider "bad". "ok" and "excellent"? As
examples, QST July '03 rates the ICOM 703 transmit 3rd order IMD at 24
db below PEP when running 10 watts. The March '06 QST shows the YAESU
FTDX9000 3rd order IMD at 35 db below PEP when running 200 watts.
My K2 has been driving a homebrew linear, 2-811As, since 2000. A JFET
elecrtonic T-R switch fed at the plate side of the tank is routed to
the 160 meter Aux antenna input for relayless switching. Works great.
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Vi
A lot of times you can make RS 232 work even without the handshake lines
like CTS, DTR, RTS.
You loop back pin 4 to 5 of the 25 pin D connector, and you hook 6, 8, and
20 together. 2, and 3 are your transmit and receive, and pin 7 is the
common.
Pin 1 is chassis ground, but do not share it wi
There is one additional component that Don forgot and that is the
replacement of one of the miniature RFC chokes on the KIO2 with a
toroid equivalent. I have suggested to Elecraft that they revise the
KIO2 to use a toroid at that location to prevent problems with people
(like me) who simply pl
Hi Everyone,
I just completed doing the A-to-B upgrades on the RF board for K2 S/N 1599.
The rig is about 5 years old and has run very well heretofore. In addition
to the A-to-B upgrades, I also installed new RF and SSB firmware, added
replacement crystals, and added the keying waveshape mod, VCO
Rob,
I would guess that Elecraft folks are not ready to put up with the headaches
that could arise with the AUXBUS timing should someone want to put a 10 or
15 foot cable on a remote KPA100/KAT100-2 combination. At the moment, those
folks have their hands full and do not have time to test it prop
Stephen,
I live in a very antenna challenged location. I have a Butternut HF6V on a
tiny city lot with lots of obstructions in the near field. 80 is a challenge
for me. And with the responsibilities of work and family I don't get to live
on the radio. With the Mojo that comes with ever
Vic, K2VCO wrote:
I doubt that it matters. What *does* matter is that you must listen
*away* from the transmitter's frequency..."
==
Well put, Vic. The only thing that should be added to Vic's procedure is
that you should keep the power output of the transmitter being tested
down eno
Since this month is the last Polar Bear Moonlight Madness Event for the
year, I will leave you all with what I consider a "special" response to
the EPA QRP Club Polar Bear Program.
Mark, NK8Q PB #4 says it all:
"It sure has been fun and without your previous adventures that you've
written about on
I am considering increasing the power of my bells and whistles QRP K2
to 100w. (Seems a long time to the next sunspot maximum and I am growing old).
Don and Lyle have given very helpful advice on building the power amp
and auto tuner into a separate unit and I would like to follow this course.
Hi all
I finished building K2 s/n 5361 yesterday and managed to align it per the specs
in the manual.
First tests (RX only) showed a wonderfully quiet receiver with "good ears". TX
is well within specs.
Encouraged by the FB results I started constructing the 160m extension today.
No worries dur
VK2NU:
>It's hard to describe, but when comparing the 2 radios
using 500hz filter settings, it almost sounded as if the
filters on the K2 were much narrower.
I belive the K2's filters are much narrower thanthe nominal
indication. KI6WX measured around 350 Hz
for both the 400 and 700 s
Hello fellow bears and all!
This Saturday is yet another PBMME! Look for WB3AAL, N7UN, NU3E and
WA3WSJ camping on the AT in PA at Round Head. We will be there Saturday
morning until Sunday morning/afternoon sometime.
Maybe we can hold a Polar Bear Meeting? Do we have a quorum-hi!
Hope to work man
Hello List:
I just finished building K2 SN 5380, with no options, for a gentleman in
Virginia and he chose to have me install the Rework Eliminators. This is
the first of these I have installed and it sure is a nice feature and well
worth the investment. Now the addition of any options wil
I got the rig ready for operation for the first time after wiring up
a power supply with the 2 amp fuse in-line.
At the scheduled hour, the elecraft net began. I let the control
station do his thing. I could not hear anyone but N0SS.
After a little while, still nervous about making the net for
Hello!
Very pleasant autumn/winter so far with K2/100 on the Topband.
Yesterday I took my K2 home for re-alignment. I noticed that KAF2 was making
my RX worse. I wonder, if there is some problem with low-pass filter or
other part of KAF? I will check soldering and components later. Audio filter
h
Michael N9BDF asked:
Should the receiver's AGC be disabled when testing a transmitter for key
clicks -- does it matter? Does it make the transmitter "sound" worse or
better?
Yes, AGC can make the clicks worse, but the BIG issue is to avoid putting
too much sign
Linden, Mike (BRC-Hes) wrote:
Should the receiver's AGC be disabled when testing a transmitter for
key clicks -- does it matter? Does it make the transmitter "sound" worse
or better?
I doubt that it matters. What *does* matter is that you must listen
*away* from the transmitter's frequency.
Fellow Elecrafters:
I got the K2 on the air today. What a wonderful rig!
73,
Steve Kercel
AA4AK
K2 S/N# 5383
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Darwin,
I have a linear that has about 1000 watts output when driven with
approx. 60 watts in class AB2 for CW and a little more when operating
class AB1 for SSB. It's an old Hallicrafter HT33A with a PL172
pentode amplifier tube. I tried it using my K2/100 on PSK31 with 20
watts average po
Should the receiver's AGC be disabled when testing a transmitter for
key clicks -- does it matter? Does it make the transmitter "sound" worse
or better?
Michael N9BDF
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Hi
I have both the 20 db and 30 db versions of the CP1. Even though the 20 db
is not rated that high I have used it at 100 watts with no problems for
short times. I use them with the OHR WM-2 wattmeter. To get it to go to 200
watts you would at least need to increase the wattage of the terminat
Hello all,
I have a large spool of #26 stranded red and black twisted pair wire.
If anyone would like to buy some wire for projects etc, send me an email
direct - off the list. Makes great power wire for your low power
projects etc. I'm asking $.10/foot. If someone wants the entire spool of
around
I have had good luck with the one RadioShack sells. Zonet ZUC3100 also
seems to work on both my laptop and desktop with everything I own. Be
careful - some do not provide all of the needed support output/inputs (CTS,
RTS, DTE, etc.). I had one that would lock up my laptop after loading the
needed
Warning!!! Cheap does not mean good. Get one that you know works, there are
some cheap USB <=> serial adapters which will not handle a high data load.
This is a common problem.
You can also get PCI cards with 2 COM ports, myself I have a PCI card with
two serial ports and an external 4 port US
Hello all, have finished my K2 with options and all turned out well. The only
reason I am selling is due to the need for some more funds for my car
restoration project, and I do have another rig. This K2 has
KNB2,KSB2,KPA100,K160RX for options. All soldering was done with Hakko 936
solder stati
Kieth,
If you have a true linear amplifier, you can always feed it with less power
than the power required for maximum output - if it produces 1000 watts with
100 watts in, it will produce 100 watts with 10 watts in (i.e. the power
gain should remain the same).
The spectral putity should either be
Should work fine with proportiannally lower output. However, 15 watts
might not be enough to hit the RF PTT in the amp so you ought to hard
switch it.
Darwin, Keith wrote:
Since a linear amp is supposed to be "linear", is there any reason that
you have to run 65 to 100 watts into one? What i
jeff (K2#5210),
I only changed the crystal X1, nothing else, and that
solved the problem . The value of RP6 is also 4.7 K.
73,
joe on5ao K2#5237
you wrote:
I have the same problem with my AGC and when I
replaced the 5.068MHz X1 the problem remained. I
wonder if both crystals are bad or if there i
Since a linear amp is supposed to be "linear", is there any reason that
you have to run 65 to 100 watts into one? What if you used a linear
designed for 65 watt drive and only gave it 15 watts? Does the spectral
purity change? Does the efficiency drop? Does the linearity degrade?
- Keith KD1E
Joe,
I have the same problem with my AGC and when I replaced the 5.068MHz X1
the problem remained. I wonder if both crystals are bad or if there is
some other cause? In my case, when I turn off the AGC, the s-meter gets
pegged at +40 and the audio is muted. Did you change any other
components or di
Timothy, KG6RII wrote:
"anyone have another solution for attaching my K2/100 to my computer? Is
there anything cheaper than $132.54?"
==
Search the Web for "usb to serial adapter" and you'll get many hits for
much, much cheaper than that.
73, de Earl, K6SE
___
Why not a $15 USB-Serial adapter?
de w1rt
On 3/8/06, res04nyt <[EMAIL PROTECTED]> wrote:
> I have purchased a new computer that has NO floppy disk drive and NO
> RS232 ports!I have
>
> searched the archives and the only solution that I see is to buy a
> MicroHam USBII!!Does
>
> anyone have anothe
I have purchased a new computer that has NO floppy disk drive and NO
RS232 ports!I have
searched the archives and the only solution that I see is to buy a
MicroHam USBII!!Does
anyone have another solution for attaching my K2/100 to my computer? Is
there anything
cheaper than $132.54?
Timo
I've recently completed my second K2 and have been running some side by side
trials with my FT1000mp.
My first time around, the K2 was my only rig and having nothing to compare
it against I had an element of self doubt that something I put together
could perform as well as an off the shelf radio.
hi elecrafters,
I received a new 5.068 Mhz Xtal and replaced the X1 on
the control board.
The Audio is not muted any more when I turn the AGC
off.
Thank you Ken K3IU, Bill WU0R, and Gary, Scott and
Brian at Elecraft service/parts.
73 de ON5AO K2#5237
joe
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