On 9/15/2020 7:19 PM, Dave wrote:
Actually the KPA1500 needs frequency tracking for the internal antenna tuner.
NO, it does not. See my previous post.
73, Jim K9YC
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On 9/15/2020 7:14 PM, Michael Walker wrote:
The
Band data is the only thing that the KPA500 requires to operate.
Actually, beginning with the tuner that goes with the K3 and their KPA
amps do NOT need band data -- they detect frequency with as little as a
35 wpm dit or a tap on the mic and
Usually called adaptive optics these days. The laser is a "guide star".
73,
Brian, K0DTJ
> On Sep 15, 2020, at 16:39, Fred Jensen wrote:
>
> Didn't the term "pre-distortion" originate in the astronomy world where one
> creates an artificial star with a powerful laser, and then distorts the
oppsss... my bad!
I saw KPA500 (not 1500). Sorry about that.
However, the cabling is the same. :)
Mike
va3mw
On Tue, Sep 15, 2020 at 10:19 PM Dave wrote:
> Hi Mike
>
> Actually the KPA1500 needs frequency tracking for the internal antenna
> tuner.
>
> The info I posted should help Mike.
Hi Mike
Actually the KPA1500 needs frequency tracking for the internal antenna tuner.
The info I posted should help Mike. He is also welcome to contact me direct and
I can assist.
73
Dave wo2x
Sent from my waxed string and tin cans.
> On Sep 15, 2020, at 10:17 PM, Michael Walker wrote:
Mike
I keep reading what you wrote, but how can you tell the difference? The
Band data is the only thing that the KPA500 requires to operate. It really
doesn't care about the exact frequency.
If you change bands on the 6400 and the KPA500 tracks from 1 band to
another, then your installation
The word that comes to mind for me is Osborne.
But Elecraft didn’t have sales of the K3S halt as soon as they announced the
K4. Indeed, the K4 has taken much longer than anticipated to ship, and supply
issues have brought an end to much of the K3(S) product line. I’m sure there is
much more
Well part of the problem with the original Hubble lenses where they were
miss ground in the 1st place
Paul KB9AVO
On Tue, Sep 15, 2020, 9:57 PM Fred Jensen wrote:
> Isn't that what they did to Hubble originally?
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> On
Isn't that what they did to Hubble originally?
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 9/15/2020 5:41 PM, Drew AF2Z wrote:
That's funny, I was also thinking of astronomy-- the
Schmidt-Cassegrain telescope where the inherent aberrations of the
relatively simple spherical
That's funny, I was also thinking of astronomy-- the Schmidt-Cassegrain
telescope where the inherent aberrations of the relatively simple
spherical mirror is corrected (pre-distorted?) with a lens...
73,
Drew
AF2Z
On 09/15/20 18:39, Fred Jensen wrote:
Didn't the term "pre-distortion"
Greetings folks. My K2 has a snapping sound when tuning the band regardless
of mode and it seems to happen when I am close to a signal...within 4 khz
or so. The snapping sound can be very strong sending the s meter soaring.
Not only does the s meter go soaring, so do my ears!
At this point I am
On 9/15/2020 3:55 PM, Andy Durbin wrote:
Who ever coined the term "predistortion" should be taken behind the bicycle
shed and introduced to a 2x4. The terminology is the epitome of obfuscation!
Hmmm. My EE degree is 56 years old, but the term seems quite clear and
descriptive to an old
On 9/15/2020 2:52 PM, Rod Hardman wrote:
Their Silicon Valley sense of good User Interface!
Give at least some of the credit for the UI to Chief Engineer and
co-owner N6KR, who is a very active operator. I've worked him several
times on CW. Also credit engineer K6XX, a world class
Are you using the KXUSB cable from the amp transceiver port to back of Flex USB?
Make sure you are in the transceiver port on amp and not AUX port.
On Flex USB cable setup make sure to enable Auto Report. Also select advanced
and set baud to 38400, 8, none, 1, and flow control none.
Cycle
Didn't the term "pre-distortion" originate in the astronomy world where
one creates an artificial star with a powerful laser, and then distorts
the telescope mirror in real time to minimize atmospheric effects
[twinkling]? That also reduces the twinkle on real nearby stars too.
Maybe that's
This is my first post. I am not sure if or where the search function is
located.
I am running a KPA-1500 and a FlexRadio 6400. The amplifier recognizes the
band that the Flex is tuned to but it doesn’t recognize the frequency. Any
help would be appreciated. I am not technically proficient
> The terminology is the epitome of obfuscation!
Not at all ... "predistortion" has been used in TV broadcasting for
more than 40 years - even back in analog TV. It started as simple
non-linear amplifiers ("proc amps") perhaps 75 years ago to adjust
for the different levels of compression in
Here on the ranch we call it "IMD optimization."
Wayne
> On Sep 15, 2020, at 3:55 PM, Andy Durbin wrote:
>
> " Now I understand better what the discussion is all about."
>
> Who ever coined the term "predistortion" should be taken behind the bicycle
> shed and introduced to a 2x4. The
Yes.
On 9/14/2020 9:10 AM, Joe Subich, W4TV wrote:
On 2020-09-14 7:29 AM, Charlie T wrote:
>
However, implementing the pre-distortion function IS probably a
better long-term solution.
Pre-distortion on a 12V rig only hides the problem. Any "home
station" rig should have 28/50 V finals
Here is the log of stations from last Sunday's 20m SSB Net. Thanks again to all
the relay stations who make this net possible. I have saved this file as a rich
text format. I am hoping that the question marks are absent in the digest
version. Eric WB9JNZ.
Elecraft SSB Nets
20 m net 1800Z
" Now I understand better what the discussion is all about."
Who ever coined the term "predistortion" should be taken behind the bicycle
shed and introduced to a 2x4. The terminology is the epitome of obfuscation!
Andy, k3wyc
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On my KPA1500, is there a way to save STBY/OPER per band setting?
Thanks & 73 de Dave, W5SV
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Another one of the many reasons I am an Elecraft fanboy - Their Silicon Valley
sense of good User Interface! Documentation and its integration to the physical
operation of the product is something the best companies in the Bay Area do
very well.
Well done, can’t wait to see it. (but Im
Many factors influence how wide the signal is in SSB, not just IMD3 numbers.
These are:
1. Quality of ALC. Here K3 is excellent. FT in class A poor.
2. Overdriving the amp. Operators choice or ignorance.
3. Transmit bandwidth. Could be 300-2400 in contests. No adjustment in K3
except by
Hi EdI just solved a similar problem with my K3 (s/n 1900 plus all K3 upgrades)
setting up WSJTx after Windows 10 update and having to renumber COM ports that
use FTDI chip USB adapters. I could not set my usual config for CAT and PTT
(using CAT) and got a PTT ERR on the K3 which would go into
I just had the opportunity to review a draft of the K4 on-screen
documentation. It's excellent! It's fully hyper-linked with HTML browser
capabilities so I could jump around, following links to my heart's content
and eventually returning to where I began reading. It includes not only the
On 9/14/2020 9:52 AM, Dave B via Elecraft wrote:
> Pre-distortion is often used in modern cellular base-station
> transmiters, and perhaps digital broadcast systems where they have to
> handle multiple carriers simultaneously, "at power".
At the beginning of this discussion I was confusing
Having solved the need for getting +Ve Tx Inhibit working on my KX3/10GHz
Transverter integration using a MOSFET switch to invert the logic level coming
from the 10GHz transverter and configured the KX3 for 0v Tx Inhibit, I had the
opportunity to test it out yesterday afternoon.
The solution
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