The 100-watt KPA-3 amplifier on my K3S quit working. The IPA is working fine
with 12 watts output. Please advise what I can check on the KPA-3 to try and
determine the issue.
TNX & 73, Dick- K9OM (r...@aol.com)
__
Elecraft
Yesterday I noticed in going from 100 watts to near a KW on
10 meters that when I turned my KPA1500 ON, the background noise
on my K3S jumped up about three S-units according to the P3.
Just turning on the front panel main "ON" switch starts the
noise even though the operate switch is still in
Does anyone know if the P3 Panadapter will work with the K2 transceiver?
It does, with a number of caveats:
- The K2 does not have an IF Out port. On my K2, I never installed the
no-antennatuner BNC connector; I modified the connector to use a small
coax cable (AWAY from the high RF output
Thanks to everyone that offered suggestions. Primarily culprit is one of
the surface mount resistors on the KPA3. I won't know for sure until I
take the KPA3 out next week, but I had that part fail before on my personal
K3.
I got the repair info from Keith WE6R and, once I can verify (or not)
Bill,
If you add the Clifton Labs Z2 buffer amplifier (now sold by DX
Engineering) to provide an IF output from the K2, it will work as a
spectrum display. It will not report the K2 VFO frequency as it does
with the K3.
73,
Don W3FPR
On 1/24/2023 3:03 PM, William Santos via Elecraft
The K2 doesn’t have an IF out, unless it has been modified. Without the IF out,
it won’t
Sent from my iPhone
> On Jan 24, 2023, at 3:05 PM, William Santos via Elecraft
> wrote:
>
> Does anyone know if the P3 Panadapter will work with the K2 transceiver?
>
> Thanks and 73,
>
> Bill
>
Does anyone know if the P3 Panadapter will work with the K2 transceiver?
Thanks and 73,
Bill
KN6UDK
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Post:
I have a KX3, running through the KXPA100, connected via Serial USB to
a Windows 10 machine. I'm using Win4k3 2.0.4.0 and com0com to share
out the COMPort. I have N3FJP's Amateur Contact Log running, as well
as FLDIGI v 4.1.18 in normal mode.
When I run a macro in FLDIGI, the macro engages the
Correction - could be 3R3 - that's an inductor.
W1GCF Geoff
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
elecraft-requ...@mailman.qth.net
Sent: Tuesday, January 24, 2023 12:42 PM
To: elecraft@mailman.qth.net
Subject:
There are very few reasons to have 3.3 Ohm resistor anywhere. It's much
more likely to have a 3.3 K Ohm resistor. This it is likely labeled 3K3 not
3R3. There is a saying that if you hear hoof beats, think horses not
zebras. Going with horses, you are looking in the schematics for a 3.3 K
ohm
Dennis,
the 3R3 SMD resistor may be R4 or R5 from the KPA3. Check it by measuring your
maximum output power. These two resistors run very hot and can unsolder
themselves from the upside down mounted KPA3
73s Steve PA2A
Message: 23
Date: Mon, 23 Jan 2023 16:21:45 -0500
From: Dennis W1UE
Running exactly at 5.0 watts or 50 watts setting CAN cause a change in
the TX GAIN setting on a K3(s). That is the setting that can trigger
the calibration algorithm; which if not connected to a dummy load, can
be 'wrong' (causing problems).
The K4 has a menu item to en/disable changes in
I do not believe that 5 and 50 watts cause issues on the K3S. I do not
recall seeing this in th manual and I have never had an issue doing it.
You can search Elecraft archives here:
https://www.mail-archive.com/elecraft@mailman.qth.net/maillist.html
John KK9A
Lee Hiers AA4GA wrote:
How
Hi Dennis;
What is your serial #?
And please send me a picture of the part.
I bet it is a feedback resistor on the KPA3, they run hot and fall off.
We have upgraded beefier parts, shoot me an email when you pull the KPA3
and confirm (there are TWO of them close the Finals).
The 3R3 resistor is
I’d like clarification on this also. I don’t run an amp but I’ve run my K3 for
years at 5 watts for QRP events without issue. My TUN PWR is set to 7 watts to
keep my remote tuner and LPA happy.
The manual states that to manually initiate a TX GAIN calibration to set TUN
PWR to exactly 5 (or
Here is one place (QTH.net is not the only Elecraft list):
https://groups.io/g/Elecraft-K3/message/37177?p=%2C%2C%2C20%2C0%2C0%2C0%3A%3Acreated%2C0%2Ctx+gain%2C20%2C2%2C0%2C92585600
73,
Rick nk7i
On 1/24/2023 9:31 AM, Lee Hiers wrote:
Searching what? The only archives I see are listed by
Searching what? The only archives I see are listed by month, with no place
to enter a search - that's my search issue!
73 de Lee
On Tue, Jan 24, 2023 at 12:26 PM Jim McCook wrote:
> Lee, just try searching with keywords, such as TX GAIN, K3 power spikes,
> TX GAIN Calibration, etc. etc.
Lee, just try searching with keywords, such as TX GAIN, K3 power spikes,
TX GAIN Calibration, etc. etc. The best thing you can do, if you're not
convinced transmitting at 5 or 50w is a risk, is ask Elecraft. K6XX,
who designed the KPA1500, was the first to tell me about this. Keith,
who
How would one search the archives for this info?
Is this only the K3S, or does it also include K3? How about a K3/10?
And you're saying one should never transmit with the transmitter set to 5W
(or 50W)?
I do drive an Alpha 8410 with my K3/10 - and I've probably done so at 5W
out of the K3/10,
ARRL implemented new computer system that changed some usernames (mine
included) form their call sign to their email address. That results in the
ARRL email redirector rejecting the mailto address. Call ARRL and get them
involved. Their IT department had to fix mine. All well now.
Sam K4SOC
Dave,
You should _never_ key the K3s at 5w (or 50w)! It can disrupt the TX
GAIN settings and create huge power spikes, which can be a real problem
if you use an amplifier. Just use 6w or 4w or 5.5w, etc. You can
confirm this with Elecraft, who will tell you the same thing. Check
N6TV “Y-Box For Sale. Version 2.2. It’s never been used. Info at The Y-BOX by
N6TV (kkn.net) No cables….See N6TV for your cable requirements. $80 shipped.
Please respond off-list to n...@comcast.net. 73 - Dave N8AG
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