I recently had the same error on my kpa500 recently. Investigation revealed
the PSU board multiplier could produce 210V OFF LOAD with the PSU>LPF jumper
disconnected but only 60v when the jumper was connected. Simulating the pin
diode current consumption with a resistor also produced the same
Just an interesting aside.
Last night at the radio club meeting the guys were checking out a Yaesu
controller box that will operate the az/el rotor for an ARISS contact this June
from our local library. No one could get it to work until someone brought in
another connecting cable (I think it
How much do you want to spend?
One of these Bird Termaline series, or similar is the top of the line, but
will cost you:
https://www.birdrf.com/Products/Test%20and%20Measurement/Loads/Coaxial-Terminations/500-watts/8201_500-Watt-Oil-Cooled-Terminations.aspx
I was lucky to find a DA412B/U
Tightening inside PL259's with pliers is not desirable, because each Hams
definition of "SNUG" occurs at different Torque levels.
I want to use my hands to screw them on and off.
Also, when you have SO239 chassis mounted "Round" connectors (using one
large lock washer), then pliers will
Hi John,
I just got back in town and I know I'm late into this. I see Don is
stepping you through some things as well. Here are a couple of things I was
thinking:
Since you have a VFO output although low in frequency, I think because the
voltage at pin 7 of U6 is so high it is driving the
Hi,
Would like a recommendation for a 500 watt dummy load.
Thank you all
Richard AD1G
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On 5/1/2019 9:08 AM, Ron Durie wrote:
Tightening inside PL259's with pliers is not desirable, because each Hams
definition of "SNUG" occurs at different Torque levels.
I want to use my hands to screw them on and off.
You may like that, but mother nature likes them tight. And she always wins.
I don’t tighten pl259s with pliers. I wiggle the plug so it sets into the
mating grooves while tightening it with my fingers and never had them get
loose. I think that’s where folks go wrong...when the plug doesn’t set into the
grooves. I almost need pliers to remove the plug when disconnecting
Yes but those are Amphenol connectors. Many "good looking"
connectors we buy today have really poor plating and poor machining
tolerances. Thus all "look alike" connectors aren't the same. 10 in
a bag for $10..no thank you.
73
Bob, K4TAX
On 5/1/2019 1:32 PM, Michael Blake
Elecraft K-3
SN 00896
2.7 SSB & 400hz CW Filters
Transverter interface
100 Watt
KTCX03-1 High Stability Reference Oscillator
Operation & Construction Manuals and both USB and RS232 ports.
Excellent condition.
$1600.
Terry
W8EJO
__
Those gallon bucket dummy loads, often referred to as "Cantenna" loads,
are inexpensive and generally work OK to a limit. They do have specific
power limitations vs. time such as 1 minute at 1KW. Also, they may not
be 50 ohms. Yes, the label says 50 ohms, but is it? All 3 of mine
I agree with your process Chuck. I have never read an Amphenol document that
suggests anything other than hand tight.
Since the barrel is knurled and has no flats for a wrench it seems certain that
a wrench was not what the designer had in mind.
73 - Mike - K9JRI
> On May 1, 2019, at 2:19
Some people who are actually interest in how a new KPA1500 could indicate a low
gain fault keep opening these post to find they have absolutely nothing to do
with the subject line.
How about an update on the low gain fault? Tightening connectors has been done
to death in other threads.
73,
Hi Dave,
Don and I have had several exchanges off list, so let me bring you up to
speed. In addition to the low VFO frequencies, I had noticed some
instability in the frequencies as displayed. Don suggested that I insert a
10-15pf cap between the source of the Q19 FET and ground. I did that late
I do mostly use good adapters to bnc, but really, as I tighten to snug, then
wiggle, the barrel turns farther, each time I wiggle. I think the points nestle
down in the grooves a surprising amount. Try it.
Chuck Jack
KE9UW
Sent from my iPhone, cjack
> On May 1, 2019, at 1:36 PM, Bob McGraw
Well I spoke too soon.
I still have a KPA1500 problem. I am not getting the LO GAIN FAULT and
I do have RF out but I cannot get 1500 watts output with 50 watts drive.
I connected the KPA1500 to a dummy load and loaded the the latest
version of the KPA1500 utility.
With 20 watts drive the
Hi Ed,
I or one of our support engineers will contact you directly after we review the
config file you sent us. Most likely by either late today or early tomorrow.
73,
Eric
/elecraft.com/
On 5/1/2019 2:01 PM, Ed gilliland wrote:
Well I spoke too soon.
I still have a KPA1500 problem. I am
+1
On 5/1/2019 11:19 AM, hawley, charles j jr wrote:
I don’t tighten pl259s with pliers. I wiggle the plug so it sets into the
mating grooves while tightening it with my fingers and never had them get
loose. I think that’s where folks go wrong...when the plug doesn’t set into the
grooves. I
Great advice.
73,
Bill
K9YEQ
https://wrj-tech.com/
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Ron Durie
Sent: Wednesday, May 1, 2019 11:08 AM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] KPA1500 LOW GAIN FAULT
Tightening inside PL259's with pliers is
Folks - We've drifted way off of the original thread. Let's close the thread
now.
Eric
/elecraft.com/
On 5/1/2019 12:56 PM, Wes wrote:
+1
On 5/1/2019 11:19 AM, hawley, charles j jr wrote:
I don’t tighten pl259s with pliers. I wiggle the plug so it sets into the
mating grooves while
KX3 owner, fairly new ham, interested in frequency measurement ...
Am I right in thinking that a KX3 can *not* be slaved to a GPSDO?
Thanks and 73,
Frank K6FOD
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Does anyone have a working URL for the Elecraft Recommended Keyboards to be
used with the PX3?
I searched through the mailing list, and only found a dead link for this.
Denis
KC6AUP
--
There is no future until we settle our past...
Are the values of TXGN LP/HP saved as a part of the Configuration file?
And if so would it load the old numbers for TXGN LP/HP?
Hence if you load an old Config file should you rerun the TX Gain
calibration?
I know I could just try this, but thought it would be wise to ask first.
Rich
K3RWN
I did find this. Not new but maybe a start.
David K0LUM
"The list you speak of is a document that I am working on right now that lists
the keyboard makes and models that have been tested with the Elecraft PX3.
This information is coming from customers and myself. Until I finish adding
Frank,
There is no native capability for that in either the KX2 or KX3.
Most anything is possible, but it would take some design and engineering
by the KX3 user to add GPSDO input capability.
If you do not have those design and engineering skills, I suggest you
don't try.
73,
Don W3FPR
All,
Every ham should have a dummy load capable of the maximum power output
of the amplifier IMHO.
The "Cantenna" serves well for the purpose of checking the amplifier
operation and determining if a problem observed is the result of
"RF-in-the-shack" or an amplifier problem.
A precision
Okay Eric, thanks.
On 5/1/2019 17:31, Eric Swartz - WA6HHQ, Elecraft wrote:
Hi Ed,
I or one of our support engineers will contact you directly after we
review the config file you sent us. Most likely by either late today
or early tomorrow.
73,
Eric
/elecraft.com/
On 5/1/2019 2:01 PM, Ed
Thanks, Don. For now I'll stick with plan B (GPSDO inputs to signal
generator, the output of which is compared in Spectrum Lab to the signal
under study delivered by the KX3). At least until I can save up for a K3S.
73,
Frank K6FOD
On 5/1/19 4:55 PM, Don Wilhelm wrote:
There is no native
Just turned on K3. No audio. It was set to FT8 so I called CQ. Can hear nothing
but worked two stations?
Where is the audio going if not to the speakers?
Jack AK7O
Sent from Mail for Windows 10
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What's the difference?
greg/na8v
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