I think my RCA 44 or '77 or my Altec 639A would sound too mushy.
I'm trying to fix a Telefunken U-47 for a friend, but I wouldn't dare use it.
A friend gave me a Northern Electric carbon stand mic (looks like a
candelstick telephone but has a PTT switch) - now THAT might get some
attention!
I am reposting this item as the first deal fell through. Sheesh!
I have a brand new Elecraft W2 Wattmeter/SWR Bridge and 2 couplers. One
coupler included with the order. The other, was for use on my smaller rigs.
This Wattmeter is an outstanding addition to my K3 system but is excessive
After using the kpa500 for a couple weeks everyday on cw, the amp performed
like a charm. About 4 days ago when I was on 40 meters cw the tx light on
the K3 started turning on and off (flickering).
Turned off the K line and back on. Now I got an error message on the k3
ERROR PTT'. the K3 was in
Just a guess: RF in the shack.
When running an amplifier, things like this that never appeared when running
low power happen all the time.
As your signal increases with amplification to faraway places, it increases
inside your shack also - and perhaps to a greater degree.
Check all ground
Forgot the mention that the tx error message comes on with the amp off or on.
Donw2xb
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Hi everyone,
1. Please reply off-list
2. I want to teach my daughter how to solder leaded components onto a
circuit board (to start).
3. Where can I get a cheap (really cheap?) source of boards to play on.
Obviously, they do not need to work, can be broken, etc.
Thanks,
Doug KR2Q
Hello Johnny.
There is still no implementation of the temp vs. frequency data for the
KTCXO-3. You can enter the data into the Utility program, but it is not yet
used for anything. The KTCXO-3 does have better stability than the stock
reference oscillator, and in may cases meets the 0.5 ppm spec
Hello Don,
I have checked the values of c60 and 61 from L30, as well as c96, c95, c94,
c93, c92 and c88 from U6 and they are all correct. D21 and D22 are both
V149SL.
I don't know if you remember but while I was working on phase 2 I had an
issue with a mix varactor diodes but that was in the
Thanks, Bruce
Sent from my iPhone 4
Bruce Beford bruce.bef...@myfairpoint.net 於 2011年6月5日 下午7:34 寫道：
Hello Johnny.
There is still no implementation of the temp vs. frequency data for the
KTCXO-3. You can enter the data into the Utility program, but it is not yet
used for anything. The
I would like to thank Gary and Richard for all the help that they gave
me in trying to sort out a distorted audio problem on transmit that I
had with my K2/100. I did not seem to be able to resolve the problem, so
looking at the list on Elecraft's Website of Hams in the UK that might
be able
Ed,
The fact that your voltage on 80 meters goes from 6 volts to something
below 2 volts may indicate a problem with varactors D23 through D26 (the
group of 4) - check to be certain they are MV209 and that all are
correctly oriented and well soldered.
Check the orientation and soldering of
Hello Group,
I got my KRX3 when I was in Dayton. I now have my 20m antenna as ANT1 and 6m
antenna as ANT2. While working in 20m, I would turn on 'SUB' to monitor the DX
window of 6m at 50.110Mhz.
Now comes the question. If I notice a DX call in 6m in the 'SUB', how I can
quickly switch
Somewhere I thought I read that the KXBT3 Internal 8-AA Cell Battery Pack and
the KXAT3 ATU both occupied the same space so both could not be installed at
the same time. If so, that's going to be a tough call. I have a T1, and I
have external batteries, but I had both the ATU and Batteries
ERR PTT means that the PTT line was being held low as the K3 is starting up.
This sounds more like a poorly done connector (short), or a bit of that
tiny wire used in a shield shoved back in a male connector. Betting odds
are on the side of a physical problem with cords/connectors.
[see
Hi, George,
Wayne posted the following back on May 25th:
We're leaving hooks in place for either a 2 m or 4 m transverter (or
possibly both) in the KX3. It would be in the ~5W range, and would
substitute for the optional ATU. If you needed both the transverter
and an ATU, you'd need to use
The KX3 will be able to contain the internal battery pack, roofing filter
module and ATU at the same time. If/when an internal transverter module is
developed, it would occupy the space that the internal ATU uses. So the only
either/or combo would be regarding those two units.
-Bruce, N1RX
what about some old Personal Computer boards, I know one of the guys I
volunterr with
has replaced the caps on some of the boards with enlarged caps, perhaps there
are other
parts you could work on
other than that, a surplus store if you have one handy
al ve3gam
- Original Message -
Johnny VR2XMC wrote:
I got my KRX3 when I was in Dayton. I now have my 20m antenna as ANT1 and 6m
antenna \
as ANT2. While working in 20m, I would turn on 'SUB' to monitor the DX
window of 6m \
at 50.110Mhz.
Now comes the question. If I notice a DX call in 6m in the 'SUB', how I can
Thanks for your advice, Richard
從︰ Richard Ferch ve3...@storm.ca
收件人︰ elecraft@mailman.qth.net elecraft@mailman.qth.net
傳送日期︰ 2011年06月5日 (週日) 11:18 PM
主題︰ Re: [Elecraft] asking for operation tips - KRX3
Johnny VR2XMC wrote:
I got my KRX3 when I was in Dayton. I now have my 20m antenna as ANT1
I think it is a sensible arrangement. KX3 + a V/U HT will become a handy
station from HF to V/U ready to deploy.
TNX 73,
Johnny VR2XMC
從︰ Bruce Beford bruce.bef...@myfairpoint.net
收件人︰ elecraft@mailman.qth.net
傳送日期︰ 2011年06月5日 (週日) 11:16 PM
主題︰ Re: [Elecraft] KX3 And/Or Options
The KX3
Hi, Johnny.
I don't believe you can listen to both 20M and 6M at the same time this way.
The sub RX input is either connected the same antenna selected for the main
RX (ANT 1 or 2) or it listens on the Sub RX in connector. If the main RX is
listening on ANT 1, then your 6M antenna is -not-
Johnny-
I'm sorry, it appears I was mistaken about the antenna switching on the K3.
I have reviewed the antenna routing documentation for the sub receiver. I
see that you -can- select ANT2 on the KAT3 ATU to connect to the sub
receiver, while the main RX is connected to ANT1. Sorry for my
Bruce,
Its all right. I need to read the K3 manual a couple of times to get the
answer as well.
I do have another question. The offset of the K3 main 2.7Khz filter is -0.24.
Since I bought my KRX3 at a later stage so that I do not have a match pair of
2.7Khz filters. The offset of the
Yes, Johnny. the idea is to have the same offset for both filters. That is
why many people get the 8-pole filters for main and sub RX. They have (near)
zero offset. You two 5-pole filters are a considerable distance apart in
offset. (700 Hz) I do not know what is acceptable for a difference, as
On 6/5/2011 3:36 AM, W2XB wrote:
Disconnected the Aux cable and the problem was gone. The amp works fine
without the aux cable.
There's no real need for the AUX cable. All it really needs is PTT. It
samples RF at the input and switches to the frequency that it sees. I'm
running with nothing
There's no real need for the AUX cable.
That's true if you want to give up automatic power control (setting the
correct drive level when the KPA-500 is in use), give up band switching
the K3 from the KPA-500 and don't mind shortening of the first element
because of RF sensing.
73,
...
You can have the ATU, internal battery, and roofing filter module all
installed at the same time. Whether there's a high-band option (2 m, 4
m, etc.) is still TBD. Chance are it would substitute for the ATU. In
that case, if you still needed an ATU you could use an Elecraft T1, or
add the
I have made a short (8) M/F TMP extension cable
that allows me to move the ANT input to the KRX3
to a point on top of the KRX3. This short cable is
tied off to the brass knurled nut to keep it in place.
The BNC/F - M/TMP cable from the tuner is also
routed to the same area and tied
Hmmm ... better than the K2 but not as good as the K3 seems to me to
be a vry tiny design target :-)
If you like QRP and field operating, try Summits On The Air [SOTA].
www.sota.org.uk
73
Fred K6DGW
On 6/4/2011 8:41 PM, Joseph Trombino, Jr wrote:
I can't wait for the KX3 to come
An aerodynamics engineer will tell you a bumblebee cannot fly. Plug it
in, front or rear, set the MIC SEL menu appropriately and see how it
works. I have a very old Dispatcher variable reluctance mic. I
have no idea if it is Hi-Z or Lo-Z, and I don't know it's freq
response. It worked fine
Doug,
There are two opportunities here. One is your goal of solder practice.
The other is to find a suitable piece of electronics to take apart to
get the circuit board on which the soldering practice can take place.
The experience of taking something apart for the sake of understanding
what
Doug,
I would suggest you obtain a piece of perf-board with thru-plated holes
along with a bunch of resistors (1/4 watt are not expensive in lots of 200).
Give her the Soldering Tutorial that is on the Elecraft website.
While practice with boards that have had the components removed can be
Hi all,
I aligned the KAF2 using a XG1 and Spectrogram. I tried the broadband noise
method, but found the line for the peak very coarse, it seemed the XG1 peak
was much more stable and easier to discern. Regardless, I thought I had R1
and R2 really dialed in for both AF1 and AF2.
AF1 seems to
Yup... That's what I was hoping to hear.
I'll be watching for the Purchase Now sign to be hung out :-)
tnx
de George
WD0AKZ
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In my limited use of my P3 I have found that I prefer to use the Fixed Tune
Mode. I also prefer to spin the VFO dial to a signal rather than using the
markers and the push button. Maybe this will change later. But what I have
noticed is that all too often, the signal of interest is at the extreme
They'd have to be ancient.
The PC world has been almost totally SMD for 10 years now.
Looking at an now 8 year old Athlon Thunderbird mobo I have in the
closet,the only parts which aren't SMD are the caps around the socket 7
socket for power supply filtering and the voltage regulators.
You might
Brian,
You are being deceived by using a single signal source. It is very
difficult to adjust a filter using a single signal because you have to
plot the shape of the passband using many data points obtained by tuning
the VFO through the signal very slowly. A noise source and Spectrogram
I was working a weak station with QSB that was at about my S4 noise level.
Happened to hit ant. 2 button. Now the noise is gone but I can hear the
station weak but now solid copy. Interesting indeed! 72 Geo/W2BPI
__
Elecraft mailing
All,
I am selling my K3/100.
Serial #2546 built by myself. Transverter was installed and aligned by
Elecraft.
Complete with:-
KAT3 Internal ATU
KRX3 Sub Receiver
K144XV Internal 2m tranvsverter
KDVR DVR
KBF3 General coverage RX
Filters included:-
Main Sub
13KHz
Just performed the same test on my K2/100 copying VP5/W4OX on 18.0861 MHz.
Same result... Go figure!
Vy 73 de Bert
WA2SI
- Original Message -
From: w2b...@aol.com
To: Elecraft@mailman.qth.net
Sent: Sunday, June 05, 2011 4:52 PM
Subject: [Elecraft] K2 antenna 2 no antenna observation
There is some leakage between ANT1 and ANT2 -- so you just switched in
an attenuator of some unknown value. I will wager you had the preamp on
too. Next time, you might want to try turning off the preamp to lower
the noise, and possibly turning on the attenuator. That way, you do not
have
Sparkfun.com has pcb 'rejects' available on their website. They are not
expensive and might get you started. Once some proficiency is established,
I'd strongly suggest switching to Elecraft's line of Mini-Mods as they are
easy to build, usually in an hour or two. And, you wind up with some
Hi,
Having build a number of Elecraft kits, I thought I would try to
tackle repairing my answering machine. Why not? It's this or buy a
new one and it might be fun to try and repair it first, despite now
having to expose my ignorance here. When a call comes in, the
answering machine subsystem
On Sun, Jun 05, 2011 at 03:52:32PM -0700 I heard the voice of
Byron Servies, and lo! it spake thus:
Next to the holes for this component is a label SA102 and there is a
directionality arrow pointing from the orange band to the grey band.
How about this?
I have just looked through my
Byron,
I would guess from the SA marking on the board that this is a spark
arrestor of some type.
The rest of the puzzle is not entirely obvious to me.
73,
Don W3FPR
On 6/5/2011 6:52 PM, Byron Servies wrote:
Hi,
Having build a number of Elecraft kits, I thought I would try to
tackle
Without thinking at all about it, many people run with the preamp on all the
time. Since one has AGC, this has the effect of compressing the signal to
noise ratio. It IS really important to get used to setting ATT/PRE to move
the noise down to where it is only moderate. Just as true on a K2 as
I certainly agree with Don.
There are two effects that can enhance signals at low audio levels, often
dramatically.
One effect is the response of human hearing. Hearing responds more the
differences in levels with low level sounds. As the sound volume increases,
we perceive less and less
I am at the point in the construction manual of doing the alignment and
calibration. I got the synthesizer to align with no problems. However, when it
came to aligning the LPA I cannot get the K3 to put out any RF. I have gone
thru the steps about four times, thinking I missed a software
Make sure TX TEST is OFF.
If that doesn't work, perform an EEINIT (see the manual index) and do
all calibrations over from scratch.
73,
matt W6NIA
On Sun, 05 Jun 2011 19:36:53 -0400, you wrote:
I am at the point in the construction manual of doing the alignment and
calibration. I got the
Might be a surge arrestor (varistor). There is a similar appearing
device across the antenna jack on my old Kenwood TS-940.
- Jim, KL7CC
Don Wilhelm wrote:
Byron,
I would guess from the SA marking on the board that this is a spark
arrestor of some type.
The rest of the puzzle is
Don,
Thanks as always, your advise was spot on.
I found that the range where AF2 is in its happy place is fairly narrow,
but your method got it dialed in.
The KAF2 is very useful for CW.
73
N5BCN
-
K2 #6800 KPA100/KAT100-2, KSB2, KAT2, KIO2, K160RX, KNB2, KAF2, LP-PAN/K2 w/
Pre-amp,
It is very value for money especially a second hand unit.
Sent from my iPhone 4
Brian - N5BCN n5...@yahoo.com 於 2011年6月6日 上午8:17 寫道：
Don,
Thanks as always, your advise was spot on.
I found that the range where AF2 is in its happy place is fairly narrow,
but your method got it dialed
Even with the very poor antenna I use at my test bench (just a piece
of wire hung outside and tied to the deck railing), I would go crazy
listening to the noise on 160, 80, 40, and often 30 meters on my K2 if I
had the preamp on.
The preamp (and attenuator) settings are remembered by band
The net was small in number of participants, but signals seemed better to me
than last week. QSB remains an issue, however. Lyle, KK7P, checked in on a
KX3, s/n 2. He wasn't that strong but sounded good. A nice teaser. We had
19 participants over a 24 minute period. See you next week.
Here
I am watching the KX3 evolution with great interest. It appears to bear lots
of resemblance to the K3, but it is not clear to me where these two will
differ. Or, for that matter, how the KX3 will compare against some of the
other rigs around today.
Is there any place that shows, or can someone
On Jun 5, 2011, at 8:49 PM, TF3KX wrote:
I am watching the KX3 evolution with great interest. It appears to
bear lots
of resemblance to the K3, but it is not clear to me where these two
will
differ. Or, for that matter, how the KX3 will compare against some
of the
other rigs
Hi Kristinn
What i dont get is why people expect so much performance from a
so called portable rig. A rig designed for portable operation generally uses
poor antennas and is optimized for weight, size and battery life.
While its nice having great receiver specifications, you do have to be
John,
You can also think of the KX3 as a full-featured (if ultra-compact)
desktop radio, with a full 100 W if you add the external amp. Hence
the excellent receiver performance :)
73,
Wayne
N6KR
On Jun 5, 2011, at 9:25 PM, juergen wrote:
Hi Kristinn
What i dont get is why people expect
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