Hello
I use the Expert 1K-FA with K3 full power and ALC , but i think i have two
issue.
When i use K3 full power ( with Expert full power ) the rig output is not
stable but fluctuates around 15 watt and more or less of 5 watt , and of course
the output of Expert varies consequently .
When i
There are a lot of threads in the archive on that. Basically USB is proprietary
and RS232 is not, USB requires specific drivers for the chipset and RS232 does
not (therefore there is a licence and cost involved with USB). I've seen more
problems with USB over the years than I ever did with
Can we pre-order the KDTT yet?
--
Many ideas grow better when transplanted into another mind than in the one
where they sprang up. -Oliver Wendell Holmes, Jr., US Supreme Court Justice
(1841-1935)
On 21 Apr 2010, at 03:21, Richard Hill wrote:
Elecraft Dick Tracy Special wrist transceiver.
I have my microHam (x2) and KUSB all on a separate 7 port hub (and other gear
on that and on an identical second 7 port hub too).
73 de M0XDF, K3 #174
--
One can pay back the loan of gold, but one dies forever in debt to those
who are kind. -Malayan Proverb
On 20 Apr 2010, at 23:26, Gary Slagel
Franco,
Forget about the ALC.
Up till now I have never used the ALC between my TRX and PA. No need to.
Just gently set the power of the trx yourself to drive the PA to the
right powerlevel and go.
73
Arie PA3A
-Oorspronkelijk bericht-
Hello
I use the Expert 1K-FA with K3 full power
I seem to recall the one I have at the shop is powered and has 12 USB ports.
Don't recall the brand or model but it works nice between multiple printers,
scanners and external HD units.
73
Bob, K4TAX
- Original Message -
From: Peter Chamalian w...@arrl.net
To: k2...@kanafi.org;
Hi Franco,
Fully agree Arie's comments, I'm not using an auto Amp. only a manual
one with a Russian tetrode, and only checked on the K3 that the time
delay corresponds to the amp specs and that's all.
With my K3-100, most of the time I'm driving it with 12W and the output
with my amp is ±350W
Julian, G4ILO wrote:
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
Does anything bad happen if you use lead based solder to service RoHS compliant
boards, like
the K3?
Apart from turning the board into future toxic waste, that is :-)
73
Jon LA4RT
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Elecrafters,
i don't doubt the internal Transverter perfectly integrates in the
K3 concept, but how well do the external XV-xxx Transverters
integrate? The manual describes integration with a K2 , but not
with K3.
I have a KXV3A installed in my K3 and a 15Pin cable.
A XV-144 is on its way over the
The PC police come and take you away!
:-)
73 de M0XDF, K3 #174
--
Two things are infinite, the universe and human stupidity.
But I'm not so sure about the universe. -- Albert Einstein.
On 21 Apr 2010, at 12:17, Jon K Hellan wrote:
Does anything bad happen if you use lead based solder to
Before this faulty opinion proliferates any further; what applies to tube amps
does not follow with solid state amps.
ALC is required by most manufacturers of solid state amps to prevent
overdriving and the resulting damage to the amplifier. ALC is the mechanism
used to achieve this
On Wed Apr 21 at 0717 EDT Jon Hellan (LA4RT) wrote ...
Does anything bad happen if you use lead based solder to service RoHS
compliant boards, like the K3?
--
Jon,
Unless you have the proper equipment (special tips for example) and
training to use lead-free solder, then leaded solder is
Hi folks,
Just finished off the receiver section of my KX-1 last night. In
tweaking the trimmers (Thanks, NORCAL QRP Club, for my signal source,
your maker-generator kit!), I noticed a sharper peak with the 40m cap
than with either of the two 20 meter caps. Is this expected? Or do I
need to go
The XV144 works very well with the K3, Martin, and I get an output power
of 25W on SSB and CW. But you will need to reduce to half power on FM.
The cable is different to the one you used with your K2 and you will
need to wire a new one as follows.
Hi Bob,
I will apologize because I responded to quickly thinking all Hams are
like me...by bad habit.
I will not listed here problems faced with not properly designed ALC's
during the past and as Hams we are suppose to go a bit further to keep
the maximum of our equipment...within the limits.
As
Thanks for the responses.
I didn't realize these things were so common place and cheap and worked so
well. I've got a powered hub coming from Amazon as well as a usb keyboard
because I discovered my laptop had no provision for a regular external keyboard!
Gary Slagel/N0SXX
Hot Springs, SD
I hope nobody objects to my posting this:
As part of the World Fauna Flora (WFF44) we will be QRV from Undara
Volcano National Park from May 20th through till May 23rd, 2010.
Please visit http://www.wff44.com/en/rules/ for more info.
Frequencies:
Frequencies +/- QRM.
SSB – 3.744, 7.144,
Not wishing to prolong this thread further, but I think you'll find that
'regular keyboard' nowdays means USB !
And fast overtaking that is a BlueTooth one.
:-)
73 de M0XDF, K3 #174
--
The high minded man must care more for the truth than for what people
think. -Aristotle, philosopher (384-322
So, please do not advise someone with a solid state amp to disconnect
their ALC- unless you want to assume the cost of repairs.
Overall, I agree with that assessment. However, I do no not make use of the
K3's ALC line with my SPE solid-state amp. In looking at the SPE's
protection
In response to several requests for a few pictures of the KPAIO3
Puller 'in action', I've added some pix and an UPDATED (and
CORRECTED) ILLUSTRATION of the Puller design to my web site at:
http://www.n0ss.net/index_k3.html
or directly to that article at:
Hello Martin,
XV144 integrates with K3 very well. All you need are two coaxial and a
interface cable.
However, XV144 is extremely hot even it is used at the rated output of 10W FM.
For light duty cycle, it should be less hot.
73
Johnny VR2XMC
- 郵件原件
寄件人﹕ DM4iM
Paul,
What if you have one of the 200w or new 400w output rigs? What if you have
one of those radios that shoot out a spike of greater than 100w at the
beginning of every transmission?
Do people blast the inputs of their SS amps with 200w or 400w? You bet they
do. They fry the FETs immediately
Do people blast the inputs of their SS amps with 200w or 400w? You bet
they
do. They fry the FETs immediately too.
And that can occur whether or not an ALC line is used between the
transceiver and amp since ALC is a feedback function and the response time
back to the transceiver, and the
Franco, you should only use the ALC as amplifier protection.
ARRL's 1K-FA product review listed the 1K-FA drive requirements as
28-32 watts typical for full output. Driving it at 100 watts and
using dynamic ALC to reduce the level to 30 watts running SSB
definitely will produce varying results.
Well said Bob.
Harry WE1X
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Bob Naumann w...@w5ov.com
Date: Wed, 21 Apr 2010 09:33:18
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 and Expert 1K-FA
Paul,
What if you have one of the 200w or new 400w output
At 13:19 21/04/2010, David Ferrington, M0XDF wrote:
The PC police come and take you away!
:-)
73 de M0XDF, K3 #174
Should that be the PCB police? :-)
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The biggest blocks to tiny power supplies of the kW plus variety, are
core materials for the power supply devices and super conductive heat
sinks. There already is stuff not ready for prime time at that power
level, but the day is coming. 73, Guy.
On Tue, Apr 20, 2010 at 11:03 PM,
Fred,
I'm afraid you got mixed up with prices here.
$700 is the price for the P3!
My guess is you'd have to multiply that by a factor 3 or so...
Capital Costs: The KPA500 is alleged to cost around $700. A good 1-1.5
KW solid state amp generally runs something over $2,000 and up.
73
Richard
Thanks folks.
I've overseen the Info on the Mods Application page.
All questions answered.
Martin
--
73, DM4iM
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Julian,
I think you are using the wrong formula. The DL1 formula posted is
not correct. I'm kinda jumping in here for Don. He posted the
correction on May 9 2009 see [Elecraft] L1 vs W1 Power Reading. The
correct formula is (Vdmm + Vdiode) ^2 /25. You can assume the diode
drop is 0.3
What if you have one of the 200w or new 400w output rigs?
What if you have
one of those radios that shoot out a spike of greater than
100w at the
beginning of every transmission?
Do people blast the inputs of their SS amps with 200w or
400w? You bet they
do. They fry the FETs immediately too.
Thanks Tom. Is it available in black to match the K3? ;o)
Terry, W0FM
-Original Message-
From: Tom Hammond [mailto:n...@embarqmail.com]
Sent: Wednesday, April 21, 2010 9:13 AM
To: elecraft@mailman.qth.net
Cc: Gary Hvizdak
Subject: [Elecraft] N0SS' KPAIO3 Puller - Updated
In
You can do the same thing with a piece of string.
73, doug
From: Terry Schieler terry.schie...@wirelessusa.com
Date: Wed, 21 Apr 2010 11:24:38 -0500
Content-Language: en-us
Thanks Tom. Is it available in black to match the K3? ;o)
Terry, W0FM
-Original Message-
On Wed, 2010-04-21 at 12:23 -0400, Tom W8JI wrote:
The correct approach would be an
attenuator pad so the radio could run at near full power and
not have a chance of overdriving the amp, ...
I don't understand why more people don't do that. For example, a 3 dB
attenuator between the
hi everybody,
any suggests using K3 in RTTY?
software, hardware if needed, etc.
thanks in advance
73 de Peppe, I8UZA
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Help:
Hm, I wonder if the KPA500 has or can have provision for this. That
amp can be driven to full output by 30 watts or so, IIRC. With the K3
(or K2), power control could be done automatically by having the amp
tell the radio that it's active over the serial interface, but it's
clear the KPA500 has
Yes. In fact since with the except of a few newer radios 100W seems to be the
standard it seems to me that amplifier suppliers should build amps to that
standard.
If they have enough gain to deliver rated power with only 50 W in, then put a 3
dB pad inside. There are additional benefits to
Hi Frank,
On any given band, both VFOs will normally be either in CW or CW REV.
You can observe this by changing from CW to CW REV on VFO A at the
radio; VFO B will also switch, if it had been in CW mode. However, you
can then set up the filtering differently on the two VFOs (using FW,
T0-220 style power film resistors are fairly cheap and can easily be mounted
on heat-sinking surfaces.
David
G3UNA
Hm, I wonder if the KPA500 has or can have provision for this. That
amp can be driven to full output by 30 watts or so, IIRC. With the K3
(or K2), power control could be done
Two audio cables from the K3 Line In - Line out to a sound card In/Out. MMTTY
on computer. K3 Mode AFSK-A. VOX on. Set K3 pitch to match MMTTY mark
freq.
Some experimentation is necessary to set K3 input/output levels and soundcard
output/input levels for proper operation, but that is all
The KPA500 has in internal 3 dB attenuator in the drive path that will
be switched in automatically by the amp in cases of overdrive.
73, Eric WA6HHQ
===
On 4/21/2010 10:44 AM, Doug Faunt N6TQS +1-510-655-8604 wrote:
Hm, I wonder if the KPA500 has or can have provision for this. That
amp
Probably the biggest issue is getting rid of the 70 watts of added
heat. If there's someplace in the exiting airstream to put these
resistors
73, doug
From: David Cutter d.cut...@ntlworld.com
Date: Wed, 21 Apr 2010 18:54:21 +0100
T0-220 style power film resistors are fairly cheap
Hello to all:
Just looking for some advise or help on setting up Ham Radio Deluxe with the
K2/100. I've plugged in the RS-232 cable and set up the K2 defaults in HRD. I
also set up the COM port to 8, none, 2 with no Hardware. The only fly in the
ointment is that I am using a Prolific
It's a well-known geek webcomic.
http://xkcd.com/730/
73, doug
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When the K3 came out there was a big deal about the default ALC polarity that
resulted in a mod. Will the default connections of the KPA500 work with an
un-moded radio or will we need the mod?
David Wilburn
NM4M
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Doug
A standard RS232 cable won't work. The cable must be wired as shown in the
K2 manual.
Chuck
NN7U
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of RONALD R FREEMAN
Sent: Wednesday, April 21, 2010 11:50 AM
To:
Tom should get Elecraft to include this new puller tool in all K3 shipments.
On Apr 21, 2010, at 9:24 AM, Terry Schieler wrote:
Thanks Tom. Is it available in black to match the K3? ;o)
Terry, W0FM
-Original Message-
From: Tom Hammond [mailto:n...@embarqmail.com]
Sent:
Dear OMs,
I can not understand why one would want to run the K3 at 100 W rather
than 20/30/50 Watts. Why drive the K3 harder when driving it more lightly
should improve reliability and possibly improve linearity. The waste of
energy is also undesirable; the fifty watts out that is
You will need the mod.
This change was included on All K3s shipped on Dec 10, 2008 and later.
(Rev B KIO3 Digital board)
See: http://www.elecraft.com/K3/k3_app_notes.htm
and scroll down to:
K3 Negative ALC and Ext Band Data Pull-up Mods, Rev B: REMIOUPGD
73, Eric WA6HHQ
(Approx s/n
I agree on the protective response time of the Expert being very fast, I
have accidently hit it with 100w a couple times . it alarms and shuts
down with no apparent harm done.the absolutely best amplifier I have
ever used.
Jack
W4GRJ
-Original Message-
From:
All of a sudden I'm seeing a few postings that show up on Nabble but not
in my email inbox. At least one of mine didn't make it, but also one by
PY5EG (both were on the subject of K3 birdies). Anyone else seeing this
or has my ISP likely implemented a new and buggy spam filter?
73,
Dave
I agree with Doug but from another prospective. Look at the energy budget for
portable work. Less total consumed power is good.
Mel, K6KBE
--- On Wed, 4/21/10, Doug Turnbull turnb...@net1.ie wrote:
From: Doug Turnbull turnb...@net1.ie
Subject: Re: [Elecraft] attenuator in amp was Re: K3 and
think of it as insurance to protect against a short circuit between the
headphones
Lew K6LMP
On Apr 21, 2010, at 2:31 PM, Mel Farrer wrote:
I agree with Doug but from another prospective.
[I assume you meant perspective]
Look at the energy budget for portable work. Less
I can not understand why one would want to run the K3
at 100 W rather
than 20/30/50 Watts. Why drive the K3 harder when driving
it more lightly
should improve reliability and possibly improve linearity.
The waste of
energy is also undesirable; the fifty watts out that is
discarded
I often use a footswitch to hold the PTT closed during an over, mostly to stop
my clunky old
amplifier dropping out until the end of the over. However if I release the PTT
footswith while
still sending CW (relying on the rig's VOX to continue holding the PTT), the K3
drops part of the
morse
On Wed, Apr 21, 2010 at 3:14 PM, Eric Swartz - WA6HHQ, Elecraft
e...@elecraft.com wrote:
You will need the mod.
Ah. Will the ALC connection be prescribed as mandatory for the K3/KPA500 system?
Bob NW8L
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Richard Squire - HB9ANM wrote:
Fred,
I'm afraid you got mixed up with prices here.
$700 is the price for the P3!
My guess is you'd have to multiply that by a factor 3 or so...
I must have mixed up the P3 thread with the KPA500, there have been a
couple of posts on both subjects :-) If
K3 beta-test firmware revision 3.94 (with DSP rev. 2.54) is now
available. See release notes below for details.
Please send any questions to k3supp...@elecraft.com. For instructions
on how to load beta firmware, see:
http://www.elecraft.com/K3/k3_software.htm
73,
Wayne
N6KR
* * *
Hi Tony,
The KPA-500 is designed to work with any radio.
73, Eric WA6HHQ
---
On 4/20/2010 5:51 AM, Tony Lyon wrote:
Eric,
Will the KPA-500 be designed to support both the K2 and the K3,
or just the K3?
73,
Tony Lyon ( KJ5XF)
I can not understand why one would want to run the K3 at 100 W rather
than 20/30/50 Watts. Why drive the K3 harder when driving it more
lightly
should improve reliability and possibly improve linearity. The waste of
energy is also undesirable; the fifty watts out that is discarded
All,
Here is the statement from the developer of the SPE Expert 1K-FA - regarding
ALC, quoted from an early Expert Reflector:
I hope this will clarify the SPE Expert vs K3 - and ALC !!
Please excuse me if I step on someones toes..
quote
*The Elecraft K3 had positive-going ALC, too.
Check out this website if you are interested in some nice wighted CNC machined
knobs for Elecraft K2 and K3s. They are a bit pricey but very high quality.
www.73cnc.com
Standard disclaimer: I have nothing to do with this company I'm just a
satisfied customer.
73,
Bill - K6WLM
30-watts dissipating as heat in the front end of the amp.
The 3dB pad does
improve return loss into the amp input by the same amount.
But, the
effective gain factor of the amp is then reduced by 3dB.
A 3dB pad gives 6 dB return loss. For example if load SWR is
2:1 (5.5dB RL) and we add a 3 dB
Yes, that's right, 3 dB per trip to and from the load. Not 3 dB in total as
I indicated.
Paul, W9AC
- Original Message -
From: Tom W8JI w...@w8ji.com
To: Paul Christensen w...@arrl.net; elecraft@mailman.qth.net
Sent: Wednesday, April 21, 2010 7:05 PM
Subject: Re: [Elecraft] attenuator
*We really suggest to always leave the transceiver's output
power manual*
*control to its maximum level because the EXPERT, thanks to
its exclusive*
*design, will provide to control that level as long as the
required optimal*
*value will be reached.*
*Elecraft has only to implement a very fast
A 3dB pad gives 6 dB return loss. For example if load SWR is 2:1 (5.5dB
RL) and we add a 3 dB pad, return loss is 9.5 dB (1.4:1 SWR).
Tom,
The 6 dB R/L from the 3 dB pad is definitely correct but you lost me on the
2:1 SWR and corresponding R/L figure above. I calculate a 2:1 VSWR as a 9.3
The actual return loss improvement is twice the attenuation, but I know Paul
knows that.
--- On Wed, 4/21/10, Paul Christensen w...@arrl.net wrote:
For the same concerns, I think an auto-switched pad engaged
during an input
fault is a good idea. In the case of the SPE amp, I
would not
This thread started off with a K3 owner driving an Expert 1K-FA with
the power control set to 100 watts. That K3 owner can just set the
power knob to 30 watts and move on. Based upon the performance of the
current firmware in a K3, can't any K3 owner driving any amp can just
set the power control
sorry, Bill
the next time I get $94.00 to spend on radio,
it won't be going for a knob,
I'd add another $5.00 and buy a KTCXO3-1 TCXO,
or a 5 pole filter 200hz or 500hz filter g
gotta be a gd knob, hi hi.
Bill Miner wrote:
Check out this website if you are interested in some nice
- Original Message -
From: Paul Christensen w...@arrl.net
To: elecraft@mailman.qth.net
Sent: Wednesday, April 21, 2010 7:43 PM
Subject: Re: [Elecraft] attenuator in amp was Re: K3 and
Expert 1K-FA
A 3dB pad gives 6 dB return loss. For example if load SWR
is 2:1 (5.5dB
RL) and we
When repairing the THP amps for failed MOSFETs, how do you know with
certainty the ALC line was disconnected by the customer?
The customers tell us.
73,
Bob W5OV
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Paul
set the power control to the proper drive, and forget the ALC? ALC
doesn't fix leading spikes anyway, so what's it good for?
Arguably, ALC helps to function as a time-averaging RF level control that
can protect against ongoing over-drive but not necessarily peak power busts.
What I don't
Hi Doug,
I hoped the cables would connect the way you described, but was not sure the
serial communications would pass through each device. Since each auxiliary
piece of equipment is labeled with ports for PC and XCVR, which would be the
first connected to the PC and which would be connected to
I've seen this posted before, but just noticed it tonight, the first
time I've operated the rig on the air since I fixed an intermittent
last Saturday. I also just installed version 3.94. The posts I've seen
before talked about SSB, but . . . .
If I adjust the power control to the power I
As long as I'm on a 'roll', I might as well post this item as well...
Removing this side panel screw is relatively painless, but
reinstalling it is more difficult. Because the screw is threaded
through two threaded devices (2D fastener and hex standoff), with no
split lock washer between them
Since the input Z of most solid-state amps is
well-controlled at 50-ohms,
that the input Z should not appreciably change as output Z
changes, then
can't we simply use a feed-forward ALC system instead of
feedback ALC? A
fast RF voltage peak detector can be bridged across the
amp's input Z.
I get that in general given all the various TRX out there.
But for the K3, the digital functions in firmware do a far better job
of signal management before the signal is ever analog, much less RF,
which can include pre-compensating for issues in the analog circuits.
Much of the talk seems to
Couldn't agree more. Especially the split-band processing part :-)
http://k6mhe.com/n7ws/S_PROC.pdf
BTW, arguably one of the best sounding SSB rigs around, the TS870 does use
split-band speech clipping done in DSP. I bought mine new in 1998 and it's a
late S/N.
Wes N7WS
--- On Wed,
Guy, K2AV contacted me direct and suggested I rerun the power
calibration, something I had not done after loading the latest
firmware. The power creep has been significantly reduced to the point
of acceptability (2 to 4 watts vs 15 - 20 watts). Thanks, Guy, and
shame on me for not trying
Special thanks for the mode-EQ.
I boost band 8 EQ in cw by 8db. Really helps copy and seems to make NR more
effective too. Of course that stunk for SSB and required changing, a pain.
Pain is now gone. Big 73!
Steve
N4LQ
- Original Message -
From: Wayne Burdick n...@elecraft.com
To:
Unfortunately, my friend became a silent key earlier this year. I am
helping the family with his radio equipment.
We need to sell his K1 and KX1. Here they are:
K1:
K1-4 Four-Band 5W CW Xcvr (s/n 1103)
KFL1-2 2 Band Module
KAT1 Internal ATU for the K1
KTS1 Wide Range Tlt Stand
KNB1
I agree Bill.
Got one for my K2 and am very happy with it.
Very high quality and tunes very nicely.
The little straight key is a treat to use also.
73,
Tony W7GO
Bill Miner wrote:
Check out this website if you are interested in some nice wighted CNC
machined knobs for Elecraft K2 and K3s.
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