Gary, you may be trying to chop the cabbage a bit finer than necessary. If
you take a close look at the input power circuit for the K3 you will see the
power pole voltage is the voltage seen by the circuit breaker and the 100W
amp. The voltage measured by the K3 is after the polyfuse (12A) which
My previous message on this topic was composed while I was in a
doctor's
office waiting on my fiancee. To gather some data on coax, I did some
Google searching and found several calculators (that all seem to copy
each
other). Another thing they have in common is that they all use the
data I
I used to just leave them plugged into a Y connector and powered up the amp
I wanted to use. Now I have a KPA500 so I don't have to worry.
Jim Rhodes K0XU
Sent from my Droid Razr Maxx
On Apr 16, 2013 4:03 PM, Richard Thorpe kis...@me.com wrote:
I have a K3 and want to key two different external
Hi Gustavo,
Very good choices. The great thing about the K3 is that it is expandable and if
you build it you know what it takes to add to it. My only input would be is
that if you decide to add the sub receiver at some point down the road, plan
your final filter selections for both main and sub
Hi,
I have a K2/100 on my bench that is behaving strangely and I’d like some
advice. This has the SSB board and Z1 buffer amp and 2.04P firmware.
That radio hasn’t been used for some time and I am told it was stored in an
attic space so will have been subject to temperature swings. Initial
Steve,
That is truly erratic behavior. It sounds like either the EEPROM is
losing its data, or is having an addressing problem (the menu settings
are stored in EEPROM).
So in this particular case, I recommend you record the menu setting that
you care about and do a Master Reset (hold the
Any news of a combined 6 and 10 mtr preamp for the K3? External or
internal (preferred)?
73, Pete AG7C
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Post:
I would purchase tomorrow a combined 6m and 10m internal preamp. I would
consider an external preamp but I have one for 6m and what would I do with it
if I had the combined version. An internal version would be way cleaner.
Keith
Sent from my iPhone please excuse typos
On Apr 17, 2013, at
Another vote for the RM-35. I have had mine for over 30
years. Not an issue.
Note however that Astron over specs their power supplies.
They claim that the RS-35 will do 25A continuous. It will
not. It gets too darn hot. Given the heatsink, it should
do about 20 continuous. This is with
Just as an additional suggestion, since the unit has been in storage for a
period of time, maybe also change the battery that the EEPROM needs to
maintain its stored information?
73,
Tom - W4BQF
-Original Message-
From: elecraft-boun...@mailman.qth.net
It isn't practical to put a high-performance LNA (low-noise preamp) inside the
radio, as the area in question is already densely populated. But a multi-band
external preamp is a possibility. We'll investigate that.
73,
Wayne
N6KR
On Apr 17, 2013, at 6:13 AM, Keith Heimbold ag...@hotmail.com
I have a PR6 now but would buy a 6/10m combo as soon as released maybe 2 for
both of my K3's. Wayne I hope this may be a item that comes sooner than
later while 10m is still open for another year or so.
73,
Fred/N0AZZ
K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100
P3/SVGA--KPA500--KAT500--W2
Acording to some speculation I've been reading, it's possible that
Cycle 24 might have a double hump, so take your time and get it JUST
right, like the PR6.
Thanks for all that you do,
73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member
On Wed, 17 Apr 2013 10:16:08
Tom,
There is no battery - this is EEPROM, not battery backed RAM.
73,
Don W3FPR
On 4/17/2013 10:34 AM, Tommy wrote:
Just as an additional suggestion, since the unit has been in storage for a
period of time, maybe also change the battery that the EEPROM needs to
maintain its stored
Thanks Wayne,
I too will place an order as soon as you announce an external combined
preamp.
73, Pete AG7C
On 4/17/2013 10:39 AM, Wayne Burdick wrote:
It isn't practical to put a high-performance LNA (low-noise preamp) inside the
radio, as the area in question is already densely
What happened to the PR10 (10M preamp)? Could one of these be
daisy-chained with a PR6 on the KXV3A, and be selected based on band on
the K3? (For those who already have the PR6).
Bruce, N1RX
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Home:
I have been looking for a way to key my KX3, via USB using CWtype. I found
a solution.
Search Ebay for USB CW (morse code) keying cable with opto-isolator.
Seller is: *phutping* http://myworld.ebay.ca/phutping/?_trksid=p4340.l2559
This is a UK seller who provided the cable in 5 days UK to
I got this question off list and I thought my answer would be of
wider interest.
How do you see effects of 'NOTCH' on the P3?
Currently you get a wide green band on a blue background of the
band scope which covers the frequencies your current filters are
letting through. If the notch
Hi,
I purchased from Elecraft in 2006 a Pro-Set K2 Heil microphone headset with
3.5mm stereo sound and 3.5mm mono plugs for use with my K2. Now setting it
up on the KX3. Mode LSB 7114 kHz, VOX set to PTT. Sound in the phones
OK. But connecting the MIC puts the KX3 into transmit mode (Red TX
Wes,
As that may be (it depends on ambient air temp), most hams are not
transmitting key-down for extended time. In the communication
industry the duty-cycle for Tx to Rx time is assumed to be 10%. Most
FM equipment is equipped with time out timers that stop continuous
transmission after
Bill,
It would be nice, but it may not be possible.
Remember that the IF output is prior to the DSP, and the DSP is where
the notch is generated.
So the signal input to the P3 does not contain any notch information.
You can say that it is just a small matter of programming since the K3
and P3
Fred,
Only U6 is socketed, all the rest of the Control board ICs are to be
soldered.
If the builder followed instructions, the EEPROM U7 would be soldered
directly.
You are quite correct, sockets sometimes give trouble. Usually removing
U6 from the socket and re-inserting it will wipe the
I don't use the notch because I only work CW on the ham bands, and I
use the U indicators, but when I do work phone on MARS frequencies
I would like to have the notch width appear between the vertical
markers of the U as a colored band the same color as the U that
matched the width of the notch
Decided to sell my Elecraft XV144 transverter with crystal oven XVOVN.
In new condition. Barely used. (I use my internal K3 transverter).
Configured for seperate TX/RX antenna connectors.
Asking euro 250,-.
Worldwide shipping euro 25,-
Paypal accepted.
See Elecraft website for more info.
My shack consists of 20 transceivers. I think [!!] only 4 run directly on AC
power. The rest run from 12 VDC. My power supplies range from 35A Astrons to
El Cheapo switchers. In the past 8 years the only power supply failure I
had was an Astron. Do not over buy
George, W6GF
Hi Guys,
Challenge solved. MIC BTN to the rescue. Don't rely on the KX3's Menu,
Read/Study the Manual. Many thanks to everyone.
Regards,
73, Mark, g3xys
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Home:
http://www.rdmag.com/news/2013/04/new-microbatteries-boost-electronics
Maybe we will be able to shrink the batteries down to something easy to
carry on that day hike up the mountain.
73,
Kevin. KD5ONS
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For a small compact supply the PowerWerx supplies from West Mountain
Radio are great. They have a cooling fan and will work on 220 or 110.
For my shack supplies I have Astron RM35 and I think a RM50.
On 4/17/2013 11:19 AM, Edward R Cole wrote:
Wes,
As that may be (it depends on ambient air
The most powerful batteries on the planet are only a few millimeters in
size, yet they pack such a punch that a driver could use a cellphone powered
by these batteries to jump-start a dead car battery-and then recharge the
phone in the blink of an eye.
Sounds like an April fools addition to me.
Nature is about as prestigious as you get for scientific publications, and
Nature Communications is their online-only journal.
http://www.nature.com/ncomms/journal/v4/n4/full/ncomms2747.html
http://news.illinois.edu/news/13/0416microbatteries_WilliamKing.html
wunder
K6WRU
On Apr 17, 2013, at
That was my initial thought, although it's dated April 16. The level of
detail is even lower than one would expect in a joke, lending credibility
that it's typical consumer press, probably exaggerated, maybe grossly so,
but perhaps echoing actual work. I looked up the prof who appears to be
real
Might have to upgrade the house wiring before charging one of these
miniature car batteries. Not sure a 20-amp circuit is going to be
able to do that in the blink of an eye, fancy red and yellow milk
crate graphics not withstanding.
Perhaps when we all have cold fusion reactors in our closets.
They were primarily talking about cell phone batteries charging in the
blink of an eye, not car batteries.
Speaking of which, when was the last time any of us the battery in our
car -- driving not included?
I think the article is legit. The sources trace back to the University,
and none of
I wouldn't be surprised if the article was legitimate. It basically
refers to a method of increasing the internal density of a lithium-ion
cell via a microscopic 3-dimensional structure. There's nothing
theoretically outlandish about that ... it's just difficult to do in
practice.
Perhaps they were referring to graphene:
http://www.engineerjobs.com/content/2013/4-ways-graphene-changes-everything.htm
It may be the stuff of [future] miracles, including ultra-high density
batteries.
Wayne
N6KR
On Apr 17, 2013, at 2:35 PM, Lynn W. Taylor, WB6UUT
Hi Lee...
It's now part of the CW WGHT config menu. Tap 4 to select AUTO OFF.
This turns the VOX off on power-up to prevent keying.
73, Roger
Lee Hill wrote:
Hi:
I recently purchased a used K3.
I have noticed the exact problem described in posts in 2008,
Not that far into the future. Graphene is in development of new
semiconductor devices.
Here is a public paper on some projects.
http://www.nist.gov/pml/div683/conference/upload/Sung.pdf
73,
N2TK, Tony
-Original Message-
From: elecraft-boun...@mailman.qth.net
I sent this to Elecraft support, but I thought I'd post it here too to see
if the collective wisdom of the group might have anything to add.
Tonight during dinner I noticed my K2/100 (w/ KAT100) was showing no noise
on the S Meter. I unplugged the headphones and could hear no signals at
all, as
Jim's statement below about a KPA500 200W limit on 30M is incorrect. The
KPA500 puts out full power on all bands when driven at its normal levels
by the K3 or any other rig. Power is controlled by the drive level from
the rig, not by the amp.
Of course in the U.S. it is the responsibility of
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