Thanks Rick, info appreciated.
73 Darrell AB2E
From: elecraft-boun...@mailman.qth.net on
behalf of Rick Bates, NK7I
Sent: Sunday, May 21, 2023 4:34 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] question K3 digital duty cycle power FT8
13 seconds
13 seconds of transmit, 17 seconds of receive = 43% duty cycle.
I use (rarely) less than 100 watts, all the way up to band legal limit.
With a K3, don't worry about it. IF the cooling become inadequate due
to local environment, it'll reduce output to protect itself.
73,
Rick nk7i
On
Hi all,
I'm leaving for VP9 on Wed, and taking my trusty K3.
A little time will be devoted to FT8 so my question is what is the duty cycle
for running FT8 on K3?
I've read a couple old posts about PSK, so I'm wondering what the group is
doing.
How much power out are you running the K3 on FT8
. But the pad can be easily bypassed. Just
wonder, what is the reason for such a requirement?
73, Igor UA9CDC
- Original Message - From: Joe Subich, W4TV li...@subich.com
To: elecraft@mailman.qth.net
Sent: Friday, April 03, 2015 7:48 AM
Subject: Re: [Elecraft] Question K3 ALC w/SPE Expert
On 4/3/2015 1:30 AM, Igor Sokolov wrote:
Joe,
As I was told, they ship it with the pad at the input to meet FCC
requirement of max 15db gain. But the pad can be easily bypassed.
Just wonder, what is the reason for such a requirement?
11m.
73, Ross N4RP
--
FCC Section 97.313(a) “At all
ARRL may initiate changing that law. Proud hams could drive that change.
With current LDMOS devices lots of money can be saved with one stage
amps. That change would accelerate switching from tube amps to
technically much more advanced LDMOS amps. Less energy consumption,
smaller shack space
be easily bypassed. Just wonder, what is
the reason for such a requirement?
73, Igor UA9CDC
- Original Message - From: Joe Subich, W4TV li...@subich.com
To: elecraft@mailman.qth.net
Sent: Friday, April 03, 2015 7:48 AM
Subject: Re: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
On a deeper level, to design an amplifier with that much gain is bad
design
Huh? Why is that, Joe? We now have devices capable of 22 or even 30 dB
of clean amplification. Why should we not use it? Just because FCC does
not allow it in the U.S.? I'm not bound to FCC rules and I'd rather
UA9CDC
- Original Message - From: Joe Subich, W4TV li...@subich.com
To: elecraft@mailman.qth.net
Sent: Friday, April 03, 2015 7:48 AM
Subject: Re: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
This is because the software in the amp automatically reduces the
power in the rig
On 4/3/2015 3:01 PM, Oliver Dröse wrote:
Of course I'm just bound to German law which does not contain any
stupid (pardon me, but it is!) amplification limits, just the maximum
allowed power. How we generate it is up to us radio amateurs overhere.
It's not stupid when you become aware of the
Subject: Re: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
On 4/3/2015 3:01 PM, Oliver Dröse wrote:
Of course I'm just bound to German law which does not contain any
stupid (pardon me, but it is!) amplification limits, just the maximum
allowed power. How we generate it is up to us
was passed !
I rest my case.
73 Milverton / W9MMS
From: Joe Subich, W4TV li...@subich.com
To: elecraft@mailman.qth.net
Sent: Friday, April 3, 2015 7:09 PM
Subject: Re: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
IF! If the Amp was not bought from a local (USA) Commercial
I look at the state of the art, which is currently represented by Elecraft.
On Fri,4/3/2015 8:48 PM, Guy Olinger K2AV wrote:
I look at plus and minus 250 Hz. That's because any wider than that is
in the passband of someone up or down. AND, particularly since K3's,
people are starting to
On Fri, Apr 3, 2015 at 8:54 PM, Joe Subich, W4TV li...@subich.com wrote:
I challenge the FCC to
do something about it - to sanction both SPE and SPE's distributors
in the US.
You think the FCC is reading the Elecraft repeater every day for
content, looking for reports? You going to report
I look at plus and minus 250 Hz. That's because any wider than that is in
the passband of someone up or down. AND, particularly since K3's, people
are starting to squeeze toward three operating spots in a kHz, rather than
two. Happens all the time. That's plus and minus 167 Hz. That matches the
Oliver,
We now have devices capable of 22 or even 30 dB of clean
amplification. Why should we not use it?
Many of the solid state devices that claim 22 dB or more of gain are
*not* clean at maximum output. That 22 dB specification is based on
saturated power output - often in *pulse*
: Re: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
ARRL may initiate changing that law. Proud hams could drive that change.
With current LDMOS devices lots of money can be saved with one stage amps.
That change would accelerate switching from tube amps to technically much
more advanced LDMOS
On Fri, Apr 3, 2015 at 6:56 PM, Milverton M. Swire via Elecraft
elecraft@mailman.qth.net wrote:
Joe was just being Joe.
His reply had nothing to do with the OP original question
So true. The question had to do with setting the K3's drive level. The
off-topic posturing on
Joe just being Joe? I sure hope so -- he's a professional engineering
voice of sanity on a bunch of ham reflectors. Joe is a retired broadcast
engineer. He is absolutely right -- everything he has said is VERY solid
engineering. It's the way GOOD rigs are designed. It's the way Elecraft
rigs
. There is no Rule stating he
cannot have an SPE Expert 1.3K - FA Amp in his possession.
LIGHTEN up, this is a Hobby.
73 Milverton / W9MMS.
From: Phil Kane k2...@kanafi.org
To: elecraft@mailman.qth.net
Sent: Friday, April 3, 2015 5:56 PM
Subject: Re: [Elecraft] Question K3
Folks - Let's not get into an argument over amp gain.
We're currently restricted by FCC rules (thought I hope that eventually goes
away..)
Let's let the thread rest for now in the interest of limiting list traffic
overload for others.
73 and have a great weekend!
Eric
elecraft.com
On
Subich, W4TV li...@subich.com
To: elecraft@mailman.qth.net
Sent: Friday, April 3, 2015 7:09 PM
Subject: Re: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
IF! If the Amp was not bought from a local (USA) Commercial vendor,
no harm was done.
The op indicated he purchased
Do not use ALC to throttle K3 power levels. Regardless of what amp
manufacturers say, ALC used in that fashion is one of the worst generators
of splatter and key clicks around. They say that to keep amps from being
blown up by severe overdrive and returned under warranty.
Just don't connect it.
Hello all,
I am the proud new owner of a new K3. I am also the proud new owner of
an SPE Expert 1.3K-FA solid state amp, and I have a question for the group
regarding interfacing the K3 to the amp.
My current setup is using my Icom 756 Pro III with the SPE Expert 1.3K-FA. The
Hi Darrell,
Nearly all ALC systems cause splatter, and some are horrible. Letting the amp
control a radio's drive level is pretty much worst-case. This just about
guarantees clicky, distorted ALC response as well as poorly shaped CW keying.
Instead, we recommend adjusting the K3's drive level
This is because the software in the amp automatically reduces the
power in the rig to the best output level for the amp (on the amp
LOW=500W out= 3W drive, MID= 1000W out= 6W drive, HIGH = 1500W out =
9W drive). It works flawlessly. Actually, I could leave the power on
the Pro III untouched,
Guy,
Thanks for the tip, and a couple others who say the same thing.
I'll forget using ALC and use the internal power levels per band for driving
the amp.
Thanks all and 73,
Darrell AB2E
Date: Thu, 2 Apr 2015 23:00:35 -0400
Subject: Re: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
From
@mailman.qth.net
Sent: Friday, April 03, 2015 7:48 AM
Subject: Re: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
This is because the software in the amp automatically reduces the
power in the rig to the best output level for the amp (on the amp
LOW=500W out= 3W drive, MID= 1000W out= 6W
@mailman.qth.net
Sent: Friday, April 03, 2015 7:34 AM
Subject: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
Hello all,
I am the proud new owner of a new K3. I am also the proud new owner
of an SPE Expert 1.3K-FA solid state amp, and I have a question for the
group regarding interfacing
Working split. A is receive on 18.30 and B transmit is 18.120. After a
short time, without touching the radio, it stays in split but B goes back to
the A frequency by itself. Done this all day??? Help!
Phil
Philip LaMarche
727-944-3226
727-510-5038 Cell
http://www.w9dvm.com/
You haven't told us what is attached to the radio (or not), and therefore
able to command the radio to do that. 73, Guy.
On Mon, Jan 23, 2012 at 3:23 PM, Phil LaMarche plama...@verizon.net wrote:
Working split. A is receive on 18.30 and B transmit is 18.120. After a
short time, without
, 2012 3:34 PM
To: Phil LaMarche
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Question K3
You haven't told us what is attached to the radio (or not), and therefore
able to command the radio to do that. 73, Guy.
On Mon, Jan 23, 2012 at 3:23 PM, Phil LaMarche plama...@verizon.net wrote
-00827
CRA 1701
W9DVM
** **
*From:* guyk...@gmail.com [mailto:guyk...@gmail.com] *On Behalf Of *Guy
Olinger K2AV
*Sent:* Monday, January 23, 2012 3:34 PM
*To:* Phil LaMarche
*Cc:* elecraft@mailman.qth.net
*Subject:* Re: [Elecraft] Question K3
** **
You haven't
From: guyk...@gmail.com [mailto:guyk...@gmail.com] On Behalf Of Guy Olinger
K2AV
Sent: Monday, January 23, 2012 3:44 PM
To: Phil LaMarche
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Question K3
No PC and programs?
On Mon, Jan 23, 2012 at 3:40 PM, Phil LaMarche plama...@verizon.net wrote
It might be a good idea when asking a question like that to let everyone
know if you have anything else (hardware, software) interfaced to your rig.
Dave AB7E
On 1/23/2012 1:23 PM, Phil LaMarche wrote:
Working split. A is receive on 18.30 and B transmit is 18.120. After a
short time,
Hi Phil,
I'm not familiar with CommCat but these type of problems always turn out to
be the computer program you are running. You probably refreshed your spot
from the PC and when you did, the spot didn't have any QSX information so
the B VFO was refreshed to equal A. Find a spot where the user
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of tom wylie
Sent: Sunday, August 16, 2009 12:57 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Question K3
Through habit with my MP quite often in Contesting or pileup woking, I
Through habit with my MP quite often in Contesting or pileup woking, I
TX on my 2nd VFO and use the main VFO as a sort of RIT with all its
filters etc.
When I do this with the K3, the frequency being logged by my logging
software (logger32) is ALWAYS the main VFO frequency, which obviously
@mailman.qth.net
Subject: [Elecraft] Question K3
Through habit with my MP quite often in Contesting or pileup
woking, I
TX on my 2nd VFO and use the main VFO as a sort of RIT with all its
filters etc.
When I do this with the K3, the frequency being logged by my logging
software
:57 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Question K3
Through habit with my MP quite often in Contesting or pileup
woking, I
TX on my 2nd VFO and use the main VFO as a sort of RIT with all its
filters etc.
When I do this with the K3, the frequency being logged by my logging
Cc: tom wylie; li...@subich.com
Subject: Re: [Elecraft] Question K3
You might want to recheck this response. When operating
split, the IF
response will have the split indicator set. It will return
the current
frequency at the time the response was sent. If the radio was in
receive
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