My SS AMP need 30~45w to get 1200w or so, I never try to see what will
happen if I set the input power to 100w. Even the AMP have some room for
that(I think) -- it use 16*MRF150.
By the way, ALC cable not used. So maybe it is a good idea to add this
function -- I hope it will be limit
Jim Miller KG0KP wrote:
37C (the fan turn-on temp
What is the approximate temp for speedup to the faster speeds?
You are assuming that they are using a simple one term, proportional,
controller. You are probably right, but modern central heating
controllers are two term (they include an
David Wilburn wrote:
The fail temperature of the PA's is going to be well known and
documented. Then a safety factor is added. But I seem to recall that
Things aren't as simple as that. Mean time between failure tends to
have an inverse exponential relationship with temperature, so any
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I suppose we all like to improve what we have. This is a road to progrsss
The folks at Elecraft have proven themselves to be first class engineers.
They must have done a worst case design and thermal analysis. I would put
some faith in them. We can of course install a squirrel cage
I think there are a few points that still need to be considered here
How hot are the hot spots? 10 to 20 degrees C above ambient or 50+
degrees above ambient temp. 10 to 20 degrees above ambient temp is
nothing to worry about.
The dominant heat source is the voltage regulators, adding the Sub
I am trying to find a fault in the receiver (I've lost 3 dB of signal) i.e.
50uV in only give a reading of 6 on the meter.
So far no luck but I've now stripped off the SSB / 100W / 160 m / Dig Filter
accessories to make it easier to find.
I've linked W1, W2, and W3 but can some one advise me on
A friend that went to Dayton this year stopped by the Elecraft booth.
Unfortunately, beyond the K3, he is not familiar with Elecraft, and
cell service inside is not good. But I did get a text saying they had
these specification sheets out.
(New) Computing Watt Meter
Active Filter Amp
41 dB
~
N2CQ QRP CONTEST CALENDAR
May 15 - June 14, 2009
~
Dayton Hamvention (QRP Event - FDIM)
May 15-17
Info: http://www.hamvention.org/
You guys at Dayton - is there hamfest promo pricing on the K3 at Dayton?
Jerry W4UK
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WHAT heat problem?
Currently there are over a hundred K3's I know about from all over the
serial number range. NO burnups, NO burnt hands. Includes one who got up
and left it on TUNE which resulted in NO burned up K3. I'm still asking
about what happened to the dummy load though. NO KPA3
On Fri, 15 May 2009 10:53:10 -0400, Guy Olinger, K2AV wrote:
What heat problem? No heat problem.
Guy said it well. I'm a member of the Northern California Contest
Club, one of the largest. Our members probably own at least 100 K3s.
I own two. My neighbor K6XX owns four, and is a very sharp
On Fri, 15 May 2009, Jim Brown wrote:
On Fri, 15 May 2009 10:53:10 -0400, Guy Olinger, K2AV wrote:
What heat problem? No heat problem.
W0YK is one of our more agressive members, a world champion RTTY
contester, and an early beta tester. His response to this thread,
before he hurried off
I just checked - my ALS-600 runs 80-100 watts out with 10 watts drive from
my K3, though I normally run it at more like 500 watts output with about 70
watts drive. There is a 35 ohm resistor in series with the ALS-600 input
that can probably be reduced to give you more output power. I have
I read your article Phil. WELL DONE! I am considering the mod to my ALS-600
and my Dentron Clipperton-L as well. Seems it would work for both. I would be
interested in your kits. The etched circuit board seems more elegant than the
perfboard. A question! How is the relay SWR on 6 meters.
I also have never noticed a problem due to heat buildup in the K3. A good
cup of coffee is about 140 degrees F or 60 degrees C - well below the
failure point and within the normal operating limits of most solid state
devices. That temperature would leave your fingers red if you placed them on
an
Is anyone using the ALS-600 with their K2/QRP?
Dick, K2ZR
PS: Phil ( AS5X ) TU for the information on the ALS-600 and your K3
Dick Stein wrote:
Is anyone using the ALS-600 with their K2/QRP?
Dick, K2ZR
PS: Phil ( AS5X ) TU for the information on the ALS-600 and your K3
Phil Debbie Salas
Be aware that roaming outside of the ham bands can cause them to get
mapped out. Then you have to go back into Config Band Map to reset
them to IN. This happens to me frequently.
73,
Drew
AF2Z
On Thu, 14 May 2009 18:56:53 -0700 (PDT), Bill NZ0T wrote:
All of a sudden tonight I can't get to
That has happened to me many times. I have N4PY and Lp-Pan, so it's a
matter of clicking on the band button in those programs and everything comes
back.
Phil
Philip LaMarche
LaMarche Enterprises, Inc.
www.instantgourmetspices.com
www.w9dvm.com
800-395-7795 pin 02
727-944-3226
FAX
On Fri, 15 May 2009 02:58:42 +, Barry VK2BJ wrote:
I have already gone down the road of cutting six vertical slots in the right
hand side panel to assist with air flow.
I would sooner mount a peltier junction on the side panel. But even
sooner than that I would just crank up the A/C...
An old thought. When trying to get heat out, one usually gets dirt, bugs, etc.
in. I like cranking up the AC and leave well enough alone. Of course there is
always the freon bath, not.
Mel, K6KBE
--- On Fri, 5/15/09, drewko drew...@verizon.net wrote:
From: drewko drew...@verizon.net
Nope, but if you order at Dayton, for (slightly) delivery, there's no STATE TAX
(OR shipping, I think).
73,
Tom N0SS
At 09:51 AM 5/15/2009, you wrote:
You guys at Dayton - is there hamfest promo pricing on the K3 at Dayton?
Jerry W4UK
I got in queue for the 2m option. No special pricing though, (I think).
Also heard Lyle talk about the K3 as an SDR. Basically what I heard at the
presentation he gave at his house last year.
Prior to Lyle's presentation there was a presentation about the Flex.
Differing philosophies were
Please summarize the differences in philosophy that you noticed.
David K0LUM
Adam Koczarski wrote
Also heard Lyle talk about the K3 as an SDR. Basically what I heard at the
presentation he gave at his house last year.
Prior to Lyle's presentation there was a presentation about the Flex.
That should not happen, that's not user-friendly at all. I trust this will
be addressed at a firmware update.
David
G3UNA
Subject: Re: [Elecraft] [K3] Help! Wierd bandswitching problem.
Be aware that roaming outside of the ham bands can cause them to get
mapped out. Then you have to go
Just returned home from Dayton. The only new K3 developments as reported by
Wayne are the new W2 wattmeter (~$240) and the 2 meter add on for the K3
(K144XV ~$300). Eric indicated that the K144XV should be available by
August. It will require an upgrade (actually a trade out) of the KXV3 for
Address what? Glitchy 3rd party rig control software?
I can spin the VFO knob on my K3 through the entire HF spectrum without
having it un-map any band.
Dave AB7E
David Cutter wrote:
That should not happen, that's not user-friendly at all. I trust this will
be addressed at a
(Snip)
Address what? Glitchy 3rd party rig control software?
I can spin the VFO knob on my K3 through the entire HF spectrum without
having it un-map any band.
Dave AB7E
Dave,
Same here too!
I regularly go for a wander between 80 and 20m bands just to see what's making
noise and I
Great stuff. Thanks for the update. I wonder if the display is at a
specific size and resolution, so by integrating the screen it is a
known element.
I had kinda hoped it would be a box that would plug into the K3, and
then plug into an available screen. You could put it on a 44 LCD, or
Hi Barry,
Thank you for your interest. I have received many replies both
good and bad. Bad, because many think I have some kind of heating
PROBLEM with the K3. Not so. My only intent is to try lower the FP
temp like you. Here's what I found. Your slots are a GOOD start but
not
I've rediscovered the pleasures of SWLing again and have spent much time
snooping around the bands, particularly the broadcast bands.
There have been no band mapping problems here and no rig control software is in
use as I'm into DIY HI!
But seriously, no problems at all encountered on v3.14
Ed, W9EJB wrote:
Just returned home from Dayton. The only new K3 developments as reported by
Wayne are the new W2 wattmeter (~$240) and the 2 meter add on for the K3
(K144XV ~$300).
I noted (may not be 100% accurate, but should be close):
$229.95 for the W2 kit or $289.95 for
Was any mention made of when these items (maybe even at the Dayton
price) would be available for web site ordering?
73, doug
Date: Fri, 15 May 2009 16:41:56 -0700
From: Iain MacDonnell - N6ML a...@dseven.org
Ed, W9EJB wrote:
Just returned home from Dayton. The only new K3
http://n2.nabble.com/K3-or-SDR-5000--td457400.html
http://n2.nabble.com/SDR---K3---and-GUI-Interface-td447927.html
You can do all kinds of flexible searches here;
http://n2.nabble.com/Elecraft-f365791.html
Flexible, he he, too funny, I made a punny.
Dave Wilburn
NM4M
David Christ wrote:
Hi all,
When K3 #321 is switched off, it automatically switches on again.
No error message, and all other functions seem normal.
Of course it stays off when the power supply is removed.
Alongside it, K3 #320 (both share the same 13.5v supply) operates as normal...
Anyone on the list
Anyone on the list experience this problem before?
Yep. Not me, but here is the description of the KPA3 12V sense mod
on the Elecraft website:
This modification adds a diode to the KPA3 12V sense circuit to hold
the voltage to no more than 0.6V when the K3 is turned off. Without
it, some K3s
I tune out of band on a regular basis for SWLing and have no
such problem. If you're using rig control software, I suggest
you look in that area.
73, Mac, KR0I
**An Excellent Credit Score is 750. See Yours in Just 2 Easy
Steps!
By Tuesday afternoon (or possibly earlier), after we recover from our Dayton
marathon. :-)
73,
Eric
_..._
-Original Message-
From: Doug Faunt N6TQS +1-510-655-8604 fa...@panix.com
Date: Friday, May 15, 2009 7:51 pm
Subject: Re: [Elecraft] Dayton - Initial Reconnaissance
To:
Hi Tony,
We've looked at the fp temp range during the design, testing and now during our
ongoing relaibility testing of the K3. There is nothing out of range here and
we are very comfortable with it.
It is not a reliability issue at these temps, and it certainly not causing any
operational
Hi Tony,
We've looked at the fp temp range during the design, testing and now during our
ongoing relaibility testing of the K3. There is nothing out of range here and
we are very comfortable with it.
It is not a reliability issue at these temps, and it certainly not causing any
operational
Hi -
I'm in the process of building my K2. I've completed the control board, and am
performing the resistance checks as recommended in the manual. All check out
OK except for the test for pins 29 and 30 of U6 (the dash and dot/ptt pins).
The resistance values as stated in the manual are
Good job, Drew! I repeated your steps and confirm the same result:
40m is mapped out. Now that it's repeatable it can be fixed. (BTW,
I'm running FW 3.11)
73
--
Joe KB8AP
On May 15, 2009, at 6:54 PM, drewko wrote:
Try the following.
Assuming all your ham bands are mapped IN, except
I don't use rig control software. I do use ACLog to log and downloaded and
starting using K3_EZ the other day and that may be what caused the problem.
At least now I know what is happening and can resolve any future problems.
73, Bill, NZ0T
I tune out of band on a regular basis for SWLing and
Try the following.
Assuming all your ham bands are mapped IN, except 5.0 MHz:
Starting somewhere on the 40m CW band...
FREQ-ENT 5.990 ENTER
Move VFO to somewhere above 6.000
BAND-UP
You end up on 30m (not in the 40m ham band as you would expect).
Go to CONFIG BND MAP and use BAND-DOWN
What is the connector for, and can I plug a 10MHz reference to it?
Mike Short
AI4NS
ai...@arrl.net
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Dan,
In this particular case, a little high is not a problem - low might be
problematic.
Normally if a single value is listed for a resistance check, allow a +/-
10% tolerance, but when a range is listed, normally the readings you
obtain should fall within the listed range.
73,
Don W3FPR
Not so simple, at least you need change the TCXO to volt-controllable one.
By the way, I ordered my 0.5ppm TCXO on local market, 25USD, works great,
After that, K3 TX freqency err not over +-2HZ from 10C to 30C on 28MHz.
So I think K3 is good enough for normal use.
I have a GPS based 10MHz
The REF input connector is for an external reference that was mentioned
way back, just like synchronous AM and TCXO additional temperature
compensation to 0.5 ppm, it seems to be getting pushed back by new
add-ons such as the internal 2m transverter card. Elecraft do not
publish a K3 project plan
On Fri, 2009-05-15 at 19:13 -0400, K2ZLS wrote:
The other driving factor here, that NOBODY seems to take
seriously, is the heating effect on the computer chips and DSP
processor. They could use heat sinks, but space limitations may be a
problem. My background is computers and I know
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