In this discussion about ALC, I have to inject a bit of fact.
The Elecraft transceivers K2/K3/K3S/KX2/KX3 use a power control system
that is different from all other amateur transceivers, and unless there
is a problem with the transceiver, there is no power overshoot. In
fact, after a band
You can pull them via the KPA500 utility; Configuration Tab, Fault table.
Rick nhc
On 2/28/2019 9:08 PM, Dave Cole (NK7Z) wrote:
Logs? Can you expand on that a bit? Does the KPA500 keep logs? How
are they available please?
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager,
Thanks for that. I never understood the Ameritron ALC instruction for my
ALS-600 so I just never used the ALC. That attached instruction was much
clearer and made sense.
Brian Denley
KB1VBF
Sent from my iPad
> On Feb 28, 2019, at 10:19 PM, Bob McGraw K4TAX wrote:
>
> This fellow seems to
Logs? Can you expand on that a bit? Does the KPA500 keep logs? How
are they available please?
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Awards
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 2/28/19 1:35 PM, Kevin der Kinderen wrote:
This fellow seems to have a good handle on the ALC issue as it relates
to overshoot in the transceiver.
https://www.w8ji.com/alc_exciter_power_overshoot.htm
Here Tom goes into the discussion of good ALC vs. bad ALC systems.
https://www.w8ji.com/ameritron_alc_adjustment.htm
73
Bob, K4TAX
Many years ago, I built a tube amplifier with what I thought was a
fairly sophisticated ALC circuit. I could never get the ALC loop to be
stable. I know a lot more about control systems now, but I still don't
know how to get ALC around an amplifier to work, and apparently neither
does anyone
And now the voice of caution.
I think the KPA500 with the KAT500 and my Flex are a wonderful combination.
That said, my KPA500 stopped working. It appears, after reviewing the logs,
I hit it with 75 watts and probably blew one of the diodes in the front
end. I can dig up the explanation if
I have had my KPA500 for around 5 years. I frequently feed through 200w from my
TS990S.
I have also accidentally abused it many times by putting 100w or more into it
or using the wrong antenna or some such operator error.
It has always just faulted appropriately and come back up smiling.
It
Yes, improperly or incorrectly using ALC with any amp or any
transceiver, for that matter, can and usually does produce distortion
and splatter. Just look at some of the signals on the bands and
observe the ALC overshoot which exists with many radios. And it is
made worse by the addition
On 2/28/2019 11:04 AM, j...@kk9a.com wrote:
I have not used ALC with any amplifier since transceivers switched to
transistor finals. From what I have read on this list, using ALC
improperly can cause distortion.
That's correct. And it's not limited to solid state amplifiers. The
owner's
I have not used ALC with any amplifier since transceivers switched to
transistor finals. From what I have read on this list, using ALC
improperly can cause distortion. Just be very careful with your drive
level. I believe that the KPA500 can handle 100 watts in bypass, 200
watts may be
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