Had the same problem in October 2010: RF gain tracking error between main and
sub RX.
Lyle then sent me a beta K3 Utility which performs the RF gain calibration
at 2 different power levels (-73 dBm and -33 dBm). Of course you need an RF
source capable of providing these power levels. This solved
Ed,
If you switch between different roofing filters, does the sweet spot occur
at the same position of the RF Gain control knob or does it change? Also
does the noise / S meter dip by the same amount regardless of which filter
is in use, if not does the depth of dip increase or decrease when
I'm in the process of trying to bring an early K2 (serial#653) kicking and
screaming
into the 21st Century, I'll also point out that I'm not the original builder
of this
radio.
For a while I've not been overly convinced about the sensitivity and dynamic
range of this particular example, it
Output on my XG2 3-frequency test oscillator appears to be down (by a
different amount on all 3 frequencies). Tried replacing battery.
Suggestions on what part(s) might be faulty?
--Andrew, NV1B
..
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Purchased new several months ago factory assembled.Now that I have the KPA500 I
don’t see a need for it.Looks new and works as new.Has the DCHF-2000 coupler
2000 Watts 1.8-54 mhz.Contact off list if interested.$195.00 plus $12.00 USPS
Priority Mail.Good in QRZ wb5xx
For those keeping track of KPA500K deliveries:
KPA500K ordered 5/17/11
Received notice of delivery on 7/15/11
Received KPA500K S/N 236 on 7/21/11
Guess what I'll be doing today? ;-)
73,
Frank - W6NEK
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Geoff... my K3 only has the one filter in it at the present time, so I can't
check that out for you.
Ed K7WIA
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Sent from the Elecraft mailing list archive at Nabble.com.
I am rebuilding my station console and would like to put a wooden shelf
above my KPA500 but am concerned about blocking air flow to the top of the
opening on the top right of the amp. The KPA will sit on the operating
table desktop with the front raised using the bail. If I put a shelf over
the
Going to order a P3 to finish my K Line. Any problem putting it on top of
the K3? Space problem after the KPA500.
Phil
Philip LaMarche
LaMarche Enterprises, Inc
mailto:p...@lamarcheenterprises.com p...@lamarcheenterprises.com
http://www.lamarcheenterprises.com/
The KPA500 manual indicates the required clearances.
73,
Lyle KK7P
I am rebuilding my station console and would like to put a wooden shelf
above my KPA500 but am concerned about blocking air flow to the top of the
opening on the top right of the amp.
Wow, their cranking them out.
I received #165 on July 13rd.
Bob, W1EQ
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of W6NEK
Sent: Friday, July 22, 2011 11:13 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500K
Andrew,
Check to see if you have 1.22 volts at the cathode of U1. If not,
replace U1.
Other than that, check the soldering (re-flow if in doubt) - there are
just not that many components to give trouble.
73,
Don W3FPR
On 7/22/2011 9:21 AM, Andrew Moore wrote:
Output on my XG2 3-frequency
Andrew,
One more suggestion - check if either D1 or D2 (near the output socket) are
shorted. (Tony KT0NY had somewhat similar problem recently and in his case
D2 was shorted, besides of other reasons.)
On Fri, Jul 22, 2011 at 10:29 AM, Don Wilhelm w3...@embarqmail.com wrote:
Andrew,
Check to
Phil...
My P3 lives atop my K3/100 with no problems. To its left sits my
SignaLink USB. The K3 is very adequately ventilated through the
rear...the only down-side (and it is totally minimal) is that the SL
sits over the speaker grill. It does not block the sound.
John Ragle -- W1ZI
On
David,
Sounds like you have set up well for ESD work. Winter low humidity
conditions are more prone to static electricity. Try not to wear
synthetic fabrics when working on sensitive stuff. Do you have a
anti-static pad? I didn't see mention of one. They are added
insurance when working
No hurry but if anyone wants to sell their P3 for whatever reason, please
contact me.
Thanks
Phil
Philip LaMarche
LaMarche Enterprises, Inc
mailto:p...@lamarcheenterprises.com p...@lamarcheenterprises.com
http://www.lamarcheenterprises.com/ www.LaMarcheEnterprises.com
Honey do's ??
From: W6NEK w6...@socal.rr.com
KPA500K ordered 5/17/11
Received notice of delivery on 7/15/11
Received KPA500K S/N 236 on 7/21/11
Guess what I'll be doing today? ;-)
--
Dave G KK7SS
Richland, WA
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The K1 has been sold.
73 Craig AC0DS
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It is possible that there is a problem in the RF gain pot. It IS a
potentiometer. It has a standard voltage across it, and the variable
voltage in the pot's wipe is sent to an analog to digital converter,
which converts the pot setting to numerical advice which can be more
easily sent to the CPU
Help needed by myself a self confessed technical idiot.
Hi All I am having a problem with my K3 when I built it last December I
did so with the KAT3 auto tuner built in.
It has worked fine for me since then until about a week ago when for
some reason it changed its mind.
Now when I press ATU
No I don't believe there is a problem with the pot. because as I just start
to turn it the gain reduces smoothly all the way. I believe it could be in
the software, where as when the gain is reduced the ckt. that controls the
bars in the S meter does not kick in soon enough.
but it seams when
Ed (K7WIA):
OK, so it looks like we have a very similar set ups. Your numbers
let me think about this a bit more.
Your ambient noise is maybe 1-2 s-units higher than mine:
P50VDG: you=S7, mine=S4.5-5
PRE (K3): you=S3, mine=S3 [interesting - I'll come back to this]
K3 with all off: you=S2,
Was interested in this thread and find that my K3 does the same thing,
but takes a
vernier touch to see it, very slight movement of the pot at about
the 2:30 to 3 oclock
position causes the S meter to dip down about 1 bar. Never noticed
it because
of the very small area, one passes by so
Please, the width of the P3?
Phil
Philip LaMarche
LaMarche Enterprises, Inc
mailto:p...@lamarcheenterprises.com p...@lamarcheenterprises.com
http://www.lamarcheenterprises.com/ www.LaMarcheEnterprises.com
727-944-3226
727-937-8834 Fax
727-510-5038 Cell
Philip LaMarche
LaMarche Enterprises, Inc
mailto:p...@lamarcheenterprises.com p...@lamarcheenterprises.com
http://www.lamarcheenterprises.com/ www.LaMarcheEnterprises.com
727-944-3226
727-937-8834 Fax
727-510-5038 Cell
http://www.w9dvm.com/ www.w9dvm.com
K3 # 1605
This would be a nice feature to have put into the menu.
to set the manual gain to max. then go into the menu and be able to adjust
the maximum gain to the way you like it.
Ed K7WIA
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View this message in context:
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Phil...nominally 6
John Ragle -- W1ZI
On 7/22/2011 4:27 PM, Phil LaMarche wrote:
Please, the width of the P3?
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Help:
Chris,
First simplify your setup by eliminating the antenna from the equation.
If you have an in-line wattmeter, connect it between the K3 and the
dummy load.
Do an ATU TUNE - make sure you have the correct ANT selected.
What do you see for the SWR?
When you transmit, what do you see for the
~
N2CQ QRP CONTEST CALENDAR
July 25 to Aug 22, 2011
~
UBA Foxhunt (CW/PSK31/SSB) *** QRP Contest ***
Jul 25, 1930z to 2030z
Rules: http://www.on5ex.be/foxhunt/foxhunt.html
On 7/22/2011 10:55 AM, John Ragle wrote:
My P3 lives atop my K3/100 with no problems. To its left sits my
SignaLink USB. The K3 is very adequately ventilated through the
rear...the only down-side (and it is totally minimal) is that the SL
sits over the speaker grill. It does not block the
Jack,
My KPA500 is on my table top with the bail up with a shelf that is 1.25 inches
above the front of the KPA500 and there is about one inch of space on both sides
of the amp and the back of the amp is about a foot from the nearest wall and the
connections to the back of the amp all drop down
Problem solved!
Thank you in particular to Tony KT0NY, Don W3FPR and Alexey.
Turns out that D1 was the problem. Note! It wasn't due to a short as some
had suggested, but rather, checking the errata sheet revealed that on the
Rev. A board (like mine), the silk screen was backwards. The banded
I forgot to mention... thanks Chuck W5UXH
--Andrew, NV1B
..
On Fri, Jul 22, 2011 at 10:03 PM, Andrew Moore andrew.n...@gmail.comwrote:
Problem solved!
Thank you in particular to Tony KT0NY, Don W3FPR and Alexey.
Turns out that D1 was the problem. Note! It wasn't due to a short as
Put a thermometer in the middle of the heatsink on my rig. On long CW
xmissions I see temps as high as 145 Degrees F. Shack temp is 85F. I have the
fan set to run on high all the time. Is this normal. I laid another small
fan on the heatsink and the temp stayed below 115F. Has anyone added
George,
That 145 degF temperature is 62.8 degC. While that is high, it is not
so high to create any damage.
Your shack temperature is much higher than what is considered normal
ambient, so that is a contributing factor.
The auxiliary cooling with your high ambient temperature is a good
I've received several emails concerning the compatibility of the K3 Utility for
Mac with OS X Lion. I installed Lion on my development iMac and initial tests
show no issues with the K3 Utility, P3 Utility and W2 Utility. Everything seems
to be working FB.
There are already plenty of
R13 is not adjusting anything. 0 volts. I was wondering what to look for.
Has anybody experience this, and what is the corrected action.
What voltage should I read at C4 D3 junction. Should it be 6.8 volts?
Thanks Dave
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David,
For those slow dialup links, Apple offers a DVD version of Lion for $49 via the
Apple Store. My installation procedure on two iMacs and my Macbook Pro was
about the same as your experience. Thanks for the tip on the hidden Library.
When I read your message I jumped over to my
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