Hello Doug,
Can I suppose there is no ATU inside the KPA500? In other words, should I
allow extra $ budget for an ATU to work with KPA500?
cheers,
Johnny VR2XMC
- 郵件原件
寄件人﹕ Doug Faunt N6TQS +1-510-655-8604 fa...@panix.com
收件人﹕ elecraft@mailman.qth.net
傳送日期﹕ 2010/4/20 (二) 12:40:10
I'm just stating my opinion that, in the big picture, the
price point for the KPA500 seems a bit on the high side for
what you get. Now seeing photos, its certainly better
looking than my ALS600. And the build quality is probably
better than my Ameritron product, but for that power
From: Vic K2VCO v...@rakefet.com
Obviously I haven't tried it (!) but I suspect that the
external magnetic field from a
toroidal transformer is much less extensive than that of the
usual laminated type.
Tom W8JI wrote:
Don't bet on it. :-)
Tom and I discussed this on the AMPS reflector, back
On Mon, 2010-04-19 at 20:56 -0700, Kok Chen wrote:
This web page is intended for web designers, but is useful for designing any
color based user interface:
http://www.iamcal.com/toys/colors/
Here's another one that does it a different way. (Click on Vision
Simulation near the upper right
Some years ago I received a complaint from W4ZV about
spurious signals offset about 1 kHz or so on my Icom 751A.
There was no amplitude modulation of the carrier visible on
scope, yet Bill could easily hear the spurs.
It turned out the toroidal transformer in the 751A internal
power supply
Refer to the NEC. It's their rule.
As a side note, a loss of property covered by insurance may
be dissallowed
if they find improper grounding contributed to the damage.
And they
reference the NEC with regard to proper.
I'm not so sure we aren't getting carried away with our own
Recently, I had to open up my K3 in order to perform a bit of
preventive maintenance, on the KPAIO3 PC board. This is the small PC
board which interfaces the KPA3 100W amp assembly to the RF board in
the Elecraft K3 HF transceiver.
The job started off easy enough... remove the top cover,
The fcc requires amplifier gain to be 15 decibels maximum for any amatuer
radio amplifier.
What a stupid regulation! On the one hand you are allowed 1500W and on the
other only 15dB gain? It makes no sense. Presumably one of the CB
regulations.
A gain of 15 dB is reasonable for a single stage
Did I read that the two finals in the KPA500 were push-pull?
73, Guy
On Tue, Apr 20, 2010 at 2:21 AM, Joe Subich, W4TV li...@subich.com wrote:
I'm just stating my opinion that, in the big picture, the
price point for the KPA500 seems a bit on the high side for
what you get. Now seeing
I can only reproduce the birdie on 80M (and there are actually two very close
together, one of which turns on as you tune up the band and then off as you
go down. They're at about S2 or 3).
But I have very few options installed, the KAT3 and one extra roofing filter
and that's it. Maybe these
~
N2CQ QRP CONTEST CALENDAR
April 20 to May 20, 2010
~
SP DX RTTY Contest
Apr 24, 1200z to Apr 25, 1200z
Rules: http://www.pkrvg.org/zbior.html
Hello All, Just a thoughtbut how about a external power supply for the
KPA-500 ? It would leave plenty of room for a built In antenna tuner ?
73 de Antnee N3ANT
--
View this message in context:
http://n2.nabble.com/External-Power-Supply-for-the-KPA-500-tp4931334p4931334.html
Sent from the
My K3 with the second receiver does not seem to have these
problems either.
- Original Message -
From: lstavenhagen lstavenha...@hotmail.com
To: elecraft@mailman.qth.net
Sent: Tuesday, April 20, 2010 10:02 AM
Subject: Re: [Elecraft] K3 birdies
I can only reproduce the birdie on 80M
Tom,
Thanks for the tip and diagram. I'll file that one for possible use later.
--Dave, W8OV
On 4/20/2010 6:08 AM, Tom Hammond wrote:
http://www.n0ss.net/kpaio3_pcb_puller_v1r1.pdf
73,
Tom Hammond N0SS
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Elecraft mailing
Hi Dick,
I would think so, but it doesn't strike me that they need the help. My
understanding is that they tuners they currently sell are very good. It
probably wouldn't be too much of a stretch to take a proven performer, modify
it according to some of the wish list items floating around
Routing the cables when adding the second RX was very tricky and
caused birdies to appear and disappear while being moved around.
Though it is an added cost, a premade wiring harness to enforce a
tested good routing would be useful.
Or perhaps if there was an actual size template of a wiring
FOR SALE: Elecraft W1 Wattmeter Kit new in bag never openned. Won at
Visalia. $80 shipping Priority Mail included. Money Order preferred.
Please contact me directly.
73
Elliott WA6TLA
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I agree, I don't mind an under the counter supply.
Mel, K6KBE
--- On Tue, 4/20/10, ANTNEE N3ANT n3...@live.com wrote:
From: ANTNEE N3ANT n3...@live.com
Subject: [Elecraft] External Power Supply for the KPA-500
To: elecraft@mailman.qth.net
Date: Tuesday, April 20, 2010, 7:15 AM
Hello All, Just
I think an internal power supply for the KPA500 with an external ATU from
Elecraft makes a lot more sense. The power supply is very likely to be a
dedicated supply due to voltage level and current draw requirements but a good
external and self-contained auto-tuner (legal limit would be nice)
Routing the cables when adding the second RX was very tricky
and
caused birdies to appear and disappear while being moved
around.
Though it is an added cost, a premade wiring harness to
enforce a
tested good routing would be useful.
If that is a problem, then maybe a better solution would be
Hm, the difference is that not everyone needs a automatic antenna
tuner and everyone needs the power supply. If you have one of them
external, there are strong arguments for it being the antenna tuner.
We have tuneable antennas, and many other antennas run fine without a
tuner. And the options
I think an internal power supply for the KPA500 with an external ATU from
Elecraft makes a lot more sense.
I like the remote-ATU idea, especially, if it incorporates an auto-tune
feature as well as a means to integrate switched antenna ports. A 500W
auto-tuner with say...six SO-239 ports
http://www.w5dxp.com/notuner.htm
--- On Tue, 4/20/10, Doug Faunt N6TQS +1-510-655-8604 fa...@panix.com wrote:
as well as intersting things like the fellow (I can't find
the URL
right now) who switches binary weighted lengths of
twin-lead feeder in
and out to match his wire to his radio.
Hi all,
I have noticed that when I send an MD3; or MD7; command to my K3
(which sets the VFO A mode to CW or CW REV respectively), the VFO B
filter settings (selected filter, filter shift and width) are changed
to the values that are currently active for VFO A. This happens with
both 3.77 and
On 4/20/2010 9:35 AM, Paul Christensen wrote:
I may have missed it, but I would like to know more about the KPA500's T/R
function -- namely, is it 100% electronic with PIN diode switching? Or, are
frame and/or vacuum relays used at the amp input and output? A silent,
PIN-diode switched amp
Would moving the Power Supply out of the KPA500 enclosure leave room for a
2nd 500 RF deck inside the K3-sized enclosure? Could two 500 Power supplies
fit in another K3-sized enclosure?
73,
Dick - KA5KKT
Hello
It's probably possible to build a KW power supply into a K3 enclosure, but a
power supply of that output would absolutely require 220VAC lines, which I
believe is one of the reasons Elecraft focused on the 500 watt amplifier size.
500 watts is about the limit for running an amplifier from 110
On Tue, 20 Apr 2010 07:22:33 +0100, Ian White GM3SEK wrote:
Obviously the answer will also depend on the quality of design and
construction, not only in the transformer but also in the rest of the
amplifier, because flux leakage is also affected by the external
connecting wires. For the lowest
I missed reading Vol. 72, issue 22 of the Elecraft Digest so got a
chuckle with this one.but
I am using a 2N as an 18-dB buffer amp following my K3. This is
on 500-KHz running the K3 in TEST mode where the output is ~ 1mw via
the KXV3 option. I run 0.25 to 0.62 mw to drive the 2N
probably not enough room for the FANS :)
bill
At 01:27 PM 4/20/2010, Edward Dickinson, III wrote:
Would moving the Power Supply out of the KPA500 enclosure leave room for a
2nd 500 RF deck inside the K3-sized enclosure? Could two 500 Power supplies
fit in another K3-sized enclosure?
On Tue, 20 Apr 2010 06:31:04 -0400, Tom W8JI wrote:
I'm not so sure we aren't getting carried away with our own
interpretation of NEC rules here. We also have to apply a
little technical common sense to our systems.
I have antennas and towers scatter over thousands of feet
distance. It would
I am running a Expert 1K-FA 1KW amplifier on 120 VAC with no problems.
Jack
W4GRJ
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Lew Phelps K6LMP
Sent: Tuesday, April 20, 2010 1:46 PM
To: Elecraft
Subject: Re: [Elecraft]
--
Message: 26
Date: Tue, 20 Apr 2010 06:31:04 -0400
From: Tom W8JI w...@w8ji.com
Subject: Re: [Elecraft] Grounding negative side of power supply?
To: Bob McGraw - K4TAX rmcg...@blomand.net, Jim Brown
j...@audiosystemsgroup.com,Elecraft List
I was wondering why my 2m transverter was producing much less output than
when I set it up, so I thought that perhaps I should do the 1 Milliwatt
calibration procedure, which I never have done. I don't, unfortunately, have
an accurate RF voltmeter, but I do have an Elecraft DL1 and a DVM.
At 1mW
When I built my K3 (with the 2nd receiver) well over a year ago I had
lots of birdies between on most of the bands, although very few on 80m.
With a dummy load on the antenna port, I logged any birdie S2 or greater
(I have a really low noise level at this QTH) and then monitored them
all
Pretend for the moment that you are Elecraft. Everyone needs a power
supply, but not everyone needs a tuner. Of those who need a tuner, not
everyone needs one with the same range (a larger issue at high power
than it is at low power), and some strongly prefer to have a remote
tuner anyway.
Hi Guys:
I do have 4(tour) K3 and I really don´t understand why Elecraft is not taking
care of it.
This is (my opinion) ridiculous!!!
Everyone is making serious comments on this issue and no effective actions???
Oms PY5EG
-Mensagem original-
De: elecraft-boun...@mailman.qth.net
Guess it depends on operations and locations, but I see the KPA-500 meeting
some broad operating needs.
I frequently operate portable, for contests, and enjoy a power boost above
exciter level power.
I've looked at the somewhat portable ACOM 1010, but it lacks 6 meter coverage
and full
Did I read that the two finals in the KPA500 were push-pull?
That's typical of these designs. The Grandberg design uses
the four MRF-150s in parallel/push-pull (two FETs on either
side).
73,
... Joe, W4TV
-Original Message-
From: guyk...@gmail.com
I have a 120-foot run of 1-5/8 inch LDF7-50A Heliax that
is grounded
at the base of the tower and at the cable entrance to the
shack. The
cable entrance is a 12x 16 inch aluminum plate that has 26
coaxial
feed thru connectors (I have over 17 antennas). The mains
(electrical meter box) is
I have always felt that on 20m the KX-1 is much quieter in terms of
background noise compared with the 3 other bands. Having just bought a XG2
on ebay, I have been comparing receive performance at the 1uV level between
40m and 20m. There's no doubt that the s/n ratio on 40m is better by
several
Yep, 7 dB is better than 5 dB. ;-)
--- On Tue, 4/20/10, ynkedra...@aol.com ynkedra...@aol.com wrote:
Is 500 watts not enough? For the rarest of the rare
DX, for top-ten contest results, maybe not. But it is
a better-than-5 dB improvement from exciter level.
What are the comparitive amounts of heat produced in a solid-state amplifier
in the RF section vs. the Power Supply section?
73,
Dick - KA5KKT
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Help:
On Tue, 20 Apr 2010 16:19:47 -0400, Tom W8JI wrote:
I disagree only on this one point Ed. The entrance ground
must be bonded to the mains ground. Not doing so sets us up
for very big problems.
RIGHT ON.
Jim K9YC
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Elecraft mailing
Thanks Wes, N7WS, for sending me back to my calculator.
500 watt output is indeed 7dB greater than 100 watts, not the 5 dB I
previously stated.
Even better.
73, Blair K3YD
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I've just upgraded to a new computer with no serial ports so I need to be
able to update the firmware in my K3. I know the KUSB is available and from
what I read, it's a usb to serial cable to enable direct communication
between computer and radio.
I'm running Windows 7, 64-bit computer.
Tom, wish I had had benefit of your invention a week ago, when I had to
replace my defective KPAIO3 board. Without benefit of instruction of any
sort, I just started in removing stuff that looked like it was in the way...
I ended up removing quite a bit of stuff! The board eventually did come
Hi guys,
I've got my new k3 hooked to the laptop using the KUSB and it worked FB first
time but, I'm going to be out of usb ports. I've got 2 ports. I'd like to use
the KUSB to the k3, a USB Winkey keyer and also a USB mouse and who knows
what down the road.
Has anyone used some
Hi all,
just to tell you that problem is solved due to big help of Elecraft
Support, in person of Gary AB7MY. I did a small mistake but tks help of
Gary I was able to solve it and at same time the ERR TXG problem.
Tks a lot all and long life for Electaft
CT1DRB
David Quental
David, Try the
I noticed the P3 and KPA500 both have RS232 interconnection to the
K3. I wonder if it will it be possible to have all three connected
simultaneously and still have PC RS232 connectivity? ...or would that
even be beneficial?
73,
Doug
KF4VTT
Sent from my iPhone
Gary,
Not exactly ur situation but I have done it with a desktop. I do recommend a
hub with its own power supply. They are priced inexpensively.
Howard..K2HK
Date: Tue, 20 Apr 2010 15:26:51 -0700
From: gdsla...@yahoo.com
To: elecraft@mailman.qth.net
Subject: [Elecraft] multi port usb
Note that the KPA500 has them labeled PC and xcvr, and that we
already know that the P3 has a pass-through RS232 connection, so it
appears the configurations are computer to KPA500, then another cable
to the P3(if you have one) then another cable to the K3.
N6TV's photo is good and the labels are
Been right down that road. I have the KUSB.
Prolific has a 4/12/2010 dated installer.zip at
http://www.prolific.com.tw/support/files/%5CIO%20Cable%5CPL-2303%5CDrivers%20-%20Generic%5CWindows%5Callinone%5CPL2303_Prolific_DriverInstaller_v1210.zip
Prolific drivers for Windows7/64 have been
ynkedra...@aol.com wrote:
Thanks Wes, N7WS, for sending me back to my calculator.
500 watt output is indeed 7dB greater than 100 watts, not the 5 dB
I previously stated.
Even better.
7 dB is 1.1667 International Standard S-units. 10 dB [1KW vs 100W] is
1.6667 ISS-u. 1.1667 ISS-u can
On 4/20/2010 3:26 PM, Gary Slagel wrote:
Has anyone used some kind of a usb hub to hook multiple devices
to the laptop simultaneously?
I have two such generic hubs hooked up to my laptop and they
work perfectly with Win XP.
-- 73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402
At my shop sits my 100 ft tower for the 3 repeaters and one of my HF
stations. Some 50 ft away is a old Hickory tree that's about 60 to 70 ft
tall. Two years ago I received a lightning strike that destroyed the
tree. No damage to the tower, any of the 12 antennas on the tower or any
of the
I guess the real questions is why it can not be a USB instead of an RS232.
It would seem to me that USB would be much easire for all.
--
View this message in context:
http://n2.nabble.com/RS232-connectivity-P3-KPA500-tp4934093p4934464.html
Sent from the [QRO] mailing list archive at
Use a powered hub rather than non-powered.
Pete, W1RM
-Original Message-
From: Phil Kane [mailto:k2...@kanafi.org]
Sent: Tuesday, April 20, 2010 7:59 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] multi port usb hub and k3 KUSB
On 4/20/2010 3:26 PM, Gary Slagel wrote:
Has
Hello Garry,
I have an 8-port hub running on this XP machine,
and a 4-port on a laptop with XP.
Have had no issues..
73! Ken Kopp - K0PP
elecraftcov...@rfwave.net
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Fred, I --think-- the estimated cost of the KPA500
you reference is in error by almost a factor of three.
73! Ken Kopp - K0PP
elecraftcov...@rfwave.net
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On Apr 20, 2010, at 1:45 PM, Lew Phelps K6LMP wrote:
You can't have it all -- legal limit amp, power supply for same, legal limit
ATU, etc. are incompatible with small size, light weight, and ability to run
on 110 VAC mains. you just can't shoehorn a big gun station into a
briefcase.
Some have had problems with non-powered hubs if other devices on the
hub are busy and active at the same time. Apparently it doesn't
happen all the time, but it does happen for some.
On Tue, Apr 20, 2010 at 9:08 PM, Ken Kopp k...@rfwave.net wrote:
Hello Garry,
I have an 8-port hub running on
On Apr 20, 2010, at 7:52 PM, Robert Mcgraw wrote:
At my shop sits my 100 ft tower for the 3 repeaters and one of my HF
stations. Some 50 ft away is a old Hickory tree that's about 60 to 70 ft
tall. Two years ago I received a lightning strike that destroyed the
tree. No damage to the tower,
Elecraft Dick Tracy Special wrist transceiver.
Being strong enough to support the 120 foot tower--Priceless.
Grin
Rich
NU6T
Bill Coleman wrote:
On Apr 20, 2010, at 1:45 PM, Lew Phelps K6LMP wrote:
You can't have it all -- legal limit amp, power supply for same, legal limit
ATU, etc.
I had an end-fed 1/2 wave L (135 feet, 65 up and 70 out) which was at
DC ground at the base feedpoint and connected with three ground rods
in a ten foot radius. Lightning evaporated it. Grounding does NOT keep
it from being struck. However it did not continue to the house on the
coax, which was
ok - please dont laugh - on second thought I guess this may be somewhat
amusing to many of you...
I'm somewhat new to ham radio - and having no elmer around -
what exactly does a amatuer radio birdie sound like?? I have an idea ...
but there are a lot of different sounds real feathered
Hi,
I am contemplating purchasing a KX1 and I would like some input regarding
the general coverage receive aspect of this unit.
I realize that the KX1 is designed for portable QRP CW use, and that is my
primary interest, however, I also like to do some general listening of SSB
signals both
Something doesn't make sense. The K3 is 10 years old and is better than an
SB-102? --- ok, I get that part.
As to the legal limit thing, perhaps the legal limit will be reduced to 100
Watts or so ;-)
:-)
Grant/NQ5T
On Apr 20, 2010, at 1:45 PM, wrote
Seriously. The K2/100 is
LOL
It just sounds like a carrier wave, Dale -- a tone that changes audio
frequency as you tune through it.
There are two definitions of birdie in ham radio lingo. The definition
being used here means a signal that is being generated INSIDE the receiver.
In other words, if you disconnect the
On 4/20/2010 5:41 PM, Peter Chamalian wrote:
Has anyone used some kind of a usb hub to hook multiple devices
to the laptop simultaneously?
I have two such generic hubs hooked up to my laptop and they
work perfectly with Win XP.
Use a powered hub rather than non-powered.
Yes...both
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