Re: [Elecraft] KPA-500 timing settings IC-7300

[Brian D]

t5he ic7300 does have an RF tail, which has recently been discussed in the
ic7300 group on groups.io

extract from there:


Hello Adam,

As you requested, I have updated the page with the new 'scope trace.
http://wb6bbb.com/Icom_IC-7300/index.html

The entire web page, including thumbnail and full-size images, is available
in this 52.1 MB zip file:
http://wb6bbb.com/Icom_IC-7300/Icom%20IC-7300%20Hot-switch%20Mitigation.zip

Thank you for your support.

Best regards,
Larry
WB6BBB


PS: I've attached a PDF file of the main page (without the Disclaimer page),
but unlike Adam's PDF, the images do not link to the web page when clicked.




Jack Brindle via Elecraft  wrote:

> The TRTime parameter sets the time the KPA takes to transition from TX to
> RX - this is specifically for transmitters that may continue to output RF
> for a short time after their PTT line becomes inactive. For the K3, K3S
> and K4 that time is very short, which means the KPA can transition
> immediately from RX to TX (it takes less than 1 mSec). There are some
> transceivers that start the key up process when the PTT line becomes
> inactive. I don’t know what the 7300 does in this case - hopefully others
> on the list have this information and can tell us.
> 


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Re: [Elecraft] Copying CW and Pitch

[Brian D]

Iworked for years on 405 line TV transmitters. I had a notch of at least
40dB at 10.125khz. I was surprised how quickly it disappeared when 405 line
TV closed down, to be replaced by a rolloff at 16kHz. 

I now roll off much lower, and keep moving my default cw sidetone as it
seems to produce a notch after a few contests, I'm currently at 650Hz but
will try 700 again soon.



Dave Cole  wrote:

> > One of the most common forms of hearing loss starts at the high
> > frequencies and works its way down with age, but that's far from
> > universal. When one or more notches develop at certain frequencies, it's
> > often the result of noise exposure at work.
> > 


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Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

[Brian D]

I got a MFJ 10-30m loop at a SK sale. The original owner had never got it to
work. The rotor vanes had fallen apart. The fixed vanes were welded to the
loop. After re-assembly it worked well, but was difficult to tune as I
couldn't hear the buzzer for finding the tune point, it was too high in
audio frequency for my old ears, cured by adding a capacitor to the circuit.




David Gilbert  wrote:

> According to another ham who recently posted here, he had to "tighten" the
> plates on the MFJ capacitor to get it to work properly.  That doesn't
> sound like they are welded, and given the cost difference for welded air
> variables I doubt MFJ used them.
> 


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Re: [Elecraft] 4k monitors for the shack, late 2019

[Brian D]

I get many fairly narrow sprogs from my 50" Asus 4k monitor, mainly 20m and
above. The antennas are quite close to the shack, the sprogs seem to be
radiated from the front of the screen.


Bert  wrote:

> Agree - I use several ASUS monitors and they are all quiet!
> 
> Bert VE3NR
> 
> 
> 
> On 11/7/2019 5:59 PM, Clay Autery wrote:
> >   
> >   
> > One word   ASUS.
> >   
> >
> >   
> > Asus has a huge line of monitors...many with external power supplies
> > giving you the option to put them on a linear DC supply...
> >   
> >   
> >   
> >
> >   
> >   
> >   
> >   
> >   
> >>   
> > > On Nov 7, 2019 at 14:47, Toxwrote:
> >>   
> >>   
> >>   Hello all, I'm going to continue to eagerly await a K4 for A While.
In the meantime, I've been reconfiguring a room to become my shack, and am
slowly terraforming it. I'd like to pick up a couple of HDMI displays to
hang on the wall above/behind the rig and the computer I interface to it.
Viewing angle will be shaded, pretty much on-axis due to location, and it
will be right next to the entry of my feedline. Expected usage would be
waterfall/UI and pskreporter type apps. What can people suggest for
quasi-affordable *RF-quiet* 4k displays in the 27-40" range? (I'm not averse
to buying something like one of the midtier Samsungs, but do not have enough
left in the wallet to consider things like OLED). Bonus points for quiet 4k
HDMI switchers so I can bring Pis to the party. Thanks, Scott AD6YT -- Scott
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> >>   
> >   
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> 


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Re: [Elecraft] KAT500 memories

[Brian D]

Are the segments on fixed frequencies? I like to work through the bands I
use before contests to set up tuning. Sometimes in the following contest I
find a frequency which seems to be between segments, retuning within 10KHz
either side doesn't then seem to correct the tuning on the specific
frequency I want to use.


Don Wilhelm <donw...@embarqmail.com> wrote:

> Harlan,
> 
> There are enough to store data for each band segment in the 160m thru 6m
> bands.  Page 15 of the KAT500 manual shows the width of each band
> segments:  Below 3 MHz the segments are 10 kHz wide.  From 3 MHz through
> 26 MHz the segments are 20 kHz wide.  From 26 MHz to 38 MHz the segments
> are 100 kHz wide.  From 38 MHz to 60 MHz the segments are 200 kHz wide.
> 
> You are not likely to run out of memories.
> 
> 73, Don W3FPR
> 
> On 4/24/2018 3:07 PM, Harlan Sherriff via Elecraft wrote:
> > I understand the tuner holds tune data in memories for quicker tuning
> > when changing frequencies, and it stores separate data for each antenna
> > port. My question is, how many data points can these memories hold? In
> > other words, how many frequencies per band per antenna can it hold?
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Re: [Elecraft] Fault on KPA500 after 300w

[Brian D]

I had a similar problem but only on 160m. would work fine for a few minutes
at full power, fine at reduced power. After much hair tearing discovered
that it was a voltage transformer in an external coupler heating up and
losing inductance, effectively shorting the feeder. Cured by using a larger
toroid in the coupler.

Brian G3VGZ



"j...@kk9a.com" <j...@kk9a.com> wrote:

> A dummy load may verify that the KPA/KAT are working properly. I am
> guessing that something is arcing in your antenna system. Perhaps water
> ingress. Have you run high power into it with a different amp?
> 
> John KK9A
> 
> 
> 
> On March 12 Alan Lambert wrote:
> 
> I recently acquired a KP500/KAT500 for use with my Kx3/KXPa100. I know the
> person I bought it from well and I am 99.% sure it is not an issue
> with the amp or tuner.
> 
>  I was making some notes (a chart) for input to output power levels,
> mostly just to ‘get to know’ the amp a little better.  At the time of
> these issues, I was on 80m SSB and the Kat500 was showing 1:1 / 1.2:1.
> 
> The output watts  I have listed below are not ‘actuals’ I’m just recalling
> them from memory so may be off a few watts.
> 
> I set the Kx3 to 8w and called “test test test 1 2 3  kn4bbc” I showed
> ~80w out with a 1:1 to 1.2:1 SWR.. GREAT!
> 
> Moved up to 9w and got 100w out… same SWR – more Great!
> 
> 10w I got 175w same SWR – sill looking good!
> 
> 11w I got  250w same SWR – Awesome!
> 
> Now this is where the problem comes in.
> 
> I set to 12w… As I starting calling my “test test test 1 2 3…”  At first
> things looked great..I was getting 300w same SWR  but then suddenly I get
> high SWR followed by  “High Refl” on the KPA5, fault light comes on and I
> get warning tones.
> 
> So I tuned the KAT500 again and tried the whole thing again with the same
> results.
> 
> Gear wise:
> 
> KX3/Kxpa100 with ATU disabled > KPA500/KAT500.
> 
> Ant1 on Kat500  >  1ft LMR400 jumper >  1:1 ATU Current Balun  > 225 feet
> of 450 ladder line > a ½ wave 80m center fed, inverted V  dipole. Center
> point is ~90 feet off ground.
> 
> The Balun is a Balun Designs Model 1161
> 
> The shack is on 2nd floor in middle of the house and has no exterior
> walls.
> 
> The ladder line starts in the shack, there is about 2 feet  of in the
> shack then enters my attic space thru and opening in a sheetrock wall.
> Inside the attic space there is a long slow, wide loop about 50 feet long.
> I was careful to keep it away from metals and it does not cross itself
> however some of it  is lying on top of plywood. From there its exits the
> house in the ridge cap at the tip top of the roof at about (40 feet off
> ground)  The ladder line then hangs from a rope that runs from the eve to
> the tree line about 175 feet away which is where the center point of the
> dipole is.  In short 175 feet outside 50 feet inside.
> 
> 
> Ideas of what my problem might be?
> 
> __ Elecraft
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Re: [Elecraft] KPA500 Problem

[Brian D]

Kevin der Kinderen <kkinde...@gmail.com> wrote:

> I'm a bit surprised that's the conclusion as simply bypassing or turning
> off the amp but leaving it connected made the problem go away. I have some
> good cable on there now but can replace each one of them to try it out.
> I'll report back later on. I really hope it is just this.
> 
I had a similar problem recemntly due to a SC diode in the TR switch, all OK
on bypass but not on operate. After changing diode (and checking associated
bits I has problems with power/dissipation on 10 and 6m cured by using a
diode from a different batch.

However, after re-assembly I had intermittent lack of RX, traced to a relay
card used externally for buffering a relay. At the time this board was
unpowered but still in circuit and was holding the KPA500 on TX. A simple
bypass proved it was the culprit and putting its 12v power back on fixed it
for good.

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Re: [Elecraft] KAT500 actual radiated power during tuning

[Brian D]

Ken K6MR <k...@outlook.com> wrote:

> The KAT500 will remember the proper settings for each frequency  segment
> (see the manual for the size of the segments on each band) and will
> instantly return to those values at the first hint of rf.

Does it remember one set of settings for each segment or does it remember
different settings for each of the antenna ports?
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Re: [Elecraft] [OT] - Tech Only Discussions

[Brian D]

Most good groups are moving away from Yahoo, Groups.io seems the main
choice.

I won't be joining any more yahoo groups.


Fred Moore <f...@fmeco.com> wrote:

> Thanks for specifying that this group is not related to the Elecraft
> Company.  That makes my decision about joining your group very easy for
> me.
> 
> .. Fred
> 
> I'll only post this one time...   That way I can make sure I observe the
> Elecraft OT rules as well..
> 
> Fred Moore email: f...@fmeco.com
>wd8...@gmail.com
> phone: 321-217-8699
> 
> On 8/21/17 7:57 AM, Michael Walker wrote:
> > Hi All
> >
> > I am only going to post this one.  I have created a spin off group for
> > technical only Elecraft discussion.  No OT discussion and focused truly
> > on the issues of your wonderful Elecraft hardware.
> >
> > This will allow this group to proceed as normal, yet this is an option
> > for those that only want to focus on the specifics of Elecraft hardware.
> >
> > This group is not associated in anyway with the Elecraft company.
> >
> > I will also be looking for a few moderators, so if you are interested,
> > please let me know.
> >
> > Please do not do a reply all to the original Elecraft group as I want to
> > observe their OT rules as well.
> >
> > Details are:
> >
> > Group Email Addresses
> >
> >- Post Message :elecraft-t...@yahoogroups.com
> >- Subscribe :elecraft-tech-subscr...@yahoogroups.com
> >- Unsubscribe :elecraft-tech-unsubscr...@yahoogroups.com
> >- List Owner :elecraft-tech-ow...@yahoogroups.com
> >
> >
> > 73, Mike va3mw
> > __ Elecraft
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> > Help: http://mailman.qth.net/mmfaq.htm Post:
> > mailto:Elecraft@mailman.qth.net
> >
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> > list: http://www.qsl.net/donate.html Message delivered to f...@fmeco.com
> 
> 
> __ Elecraft
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> 
> 


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Re: [Elecraft] Make this email list more manageable - a forum instead?

[Brian D]

I like the list as is, but moderation could be tweaked perhaps. I subscribe
(and learn from) several tens of lists. I am subscribed to a few fora, but
very rarely visit them. 

Keep the list as is!


a45wg <a4...@sy-edm.com> wrote:

> I personally like seeing the cool stuff people do with their Elecraft
> products. I fear this will be lost using vBulletin or similar forum
> approaches.
> 
> I do not have a KX2 and I do not think I  will I ever buy one (Got the
> KX3!!)- but I like reading about people going to Walk the Camino Trail,
> the same goes for the remote Ops, the same for the info regarding filters
> and Macro programming.
> 
> Regards to all
> 
>Tim, A45WG
> 
> 
>


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Re: [Elecraft] Amateur Radio Parity Act

[Brian D]

Andy McMullin <a...@rickham.net> wrote:

> I really thought this thread was closed.
> 
> Nobody outside the USA cares about your internal politicking so please
> just give it a rest! Let’s get back to Elecraft and leave the American
> Politics Stuff somewhere else. Please.

It is something that affects the rest of the world. Other countries have
similar restrictions and may follow america to tighter (or looser) crippling
of amateur radio.


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Re: [Elecraft] K3 memory editor

[Brian D]

I have exactly the same problem using it with my KX3 (win10).


"G4GNX" <g4...@g4gnx.com> wrote:

> I just started using the K3 memory editor (v1.5.7.20 dated 2015) for the
> first time and I find it behaves in a strange way, depending whether a
> memory has content or not.
> 
> At present I have general memories 0 thru 23 loaded with data and memories
> 85 thru 99 also loaded. All other memories are ‘empty’.
> 
> If I try to read all memories from the K3, the editor program reaches
> memory 24 (empty) and stalls. If I click the Cancel button, it reports
> ‘cancelling’ but does nothing. I can abort the action by clicking the red
> close icon. When I check the ‘spreadsheet’ I find that memories 0 thru 23
> are filled and displayed, but not memories 85 thru 99. The only way to
> read memories 85 thru 99 is to ‘select’ them first, then read selected.
> Attempting to read any empty memory individually results in the function
> stalling.
> 
> I also tried clearing a single memory entry and uploading it to the K3,
> which seems to work OK, but attempting to read it back, results in a
> stall.
> 
> Is this normal behavior – a bug, or do I have an old or corrupted memory
> editor.

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Re: [Elecraft] Strange SWR change on 20 at

[Brian D]

Diddn't proof read enoough, meant voltage transformer.

Brian D <gro...@planet3.freeuk.co.uk> wrote:

> I have had similar problems with swr trips on my KPA500, only after
> several transmissions on some bands. By a process of elimination it was
> traced to a toroidal voltage
transformer
> heating up in an external coupler. It came on
> suddenly after about 5 minutes of transmissions, and came good after a few
> minutes to cool. Replacing the toroid with a larger one cured the problem.
> 
> 
> 
> "Ron D'Eau Claire" <r...@cobi.biz> wrote:
> 
> > Hi Dave: I thought you said it happened after you sent CQ+Call a few
> > times. When a core heats to its Curie temp, the inductance change
> > happens "instantly". You are right - if it happens instantly when you
> > hit the key it is not heating. Something is breaking down.
> > 
> > 73, Ron AC7AC
> > 
> > -Original Message- From: Elecraft
> > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave Cole Sent:
> > Saturday, May 13, 2017 10:39 AM To: elecraft@mailman.qth.net Subject:
> > Re: [Elecraft] Strange SWR change on 20 at
> > 
> > I added the SWR meter...  My actual SWR jumps instantly up about1 SWR
> > unit...  I believe it is a bad connection on the Challenger where the
> > main antenna connects to the 20 meter tuning stub...
> > 
> > Just sort of surprised me to see a second person with the exact same
> > issue is all...  SWR change is instant, so it is not heating...  Happens
> > at 30 watts, or 1 KW...  Time for a rebuild.
> > 
> > 73s and thanks, Dave NK7Z http://www.nk7z.net
> > 
> > On 05/13/2017 10:07 AM, Dave Cole wrote:
> > > Hmmm...  I am having the exact same issue...  My SWR changes after a
> > > few transmissions, then returns...  Up until now, I have been
> > > suspecting my antenna...  Time to add an external SWR bridge between
> > > the tuner and antenna as a permanent thing...
> > >
> > > 73s and thanks, Dave NK7Z http://www.nk7z.net
> > >
> > > On 05/13/2017 09:07 AM, Terry Brown wrote:
> > > > I recently started using my horizontal loop that is about a full
> > > > wavelength on 80, for 20 meters.  I took down my yagi as we are
> > > > moving; drat!  My Horizontal Loop is at 40 ft.  height and fed with
> > > > 450 window line into a 4:1 voltage balun with about 15 ft. of coax
> > > > to rig.
> > >>
> > >>
> > >>
> > > > I am running 100 watts through my KXPA100.  I tune a frequency in
> > > > the CW portion of 20 to about 1.2 :1 and start sending CQ.  After
> > > > about 3 to 4  3x3 CQ's,, the SWR goes off the charts and power drops
> > > > to zero. I can retune the antenna and the process repeats itself.
> > > > 20 meters is the only band affected.
> > >>
> > >>
> > >>
> > > > I am wondering if I am having RF problems in that part of the 20
> > > > meter bands This only occurs on 20 meters.  The Amp is grounded, but
> > > > the KX3 is not bonded to the Amp.
> > >>
> > >>
> > >>
> > > > I would appreciate any advice.
> > >>
> > >>
> > >>
> > > > Thanks and 73's,
> > >>
> > >>
> > >>
> > > > Terry de N7TB
> > >>
> > > > __
> > > > Elecraft mailing list Home:
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> > >>
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Re: [Elecraft] Strange SWR change on 20 at

[Brian D]

I have had similar problems with swr trips on my KPA500, only after several
transmissions on some bands. By a process of elimination it was traced to a
toroidal voltage heating up in an external coupler. It came on suddenly
after about 5 minutes of transmissions, and came good after a few minutes to
cool. Replacing the toroid with a larger one cured the problem.



"Ron D'Eau Claire"  wrote:

> Hi Dave: I thought you said it happened after you sent CQ+Call a few
> times. When a core heats to its Curie temp, the inductance change happens
> "instantly". You are right - if it happens instantly when you hit the key
> it is not heating. Something is breaking down.
> 
> 73, Ron AC7AC
> 
> -Original Message- From: Elecraft
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave Cole Sent:
> Saturday, May 13, 2017 10:39 AM To: elecraft@mailman.qth.net Subject: Re:
> [Elecraft] Strange SWR change on 20 at
> 
> I added the SWR meter...  My actual SWR jumps instantly up about1 SWR
> unit...  I believe it is a bad connection on the Challenger where the main
> antenna connects to the 20 meter tuning stub...
> 
> Just sort of surprised me to see a second person with the exact same issue
> is all...  SWR change is instant, so it is not heating...  Happens at 30
> watts, or 1 KW...  Time for a rebuild.
> 
> 73s and thanks, Dave NK7Z http://www.nk7z.net
> 
> On 05/13/2017 10:07 AM, Dave Cole wrote:
> > Hmmm...  I am having the exact same issue...  My SWR changes after a few
> > transmissions, then returns...  Up until now, I have been suspecting my
> > antenna...  Time to add an external SWR bridge between the tuner and
> > antenna as a permanent thing...
> >
> > 73s and thanks, Dave NK7Z http://www.nk7z.net
> >
> > On 05/13/2017 09:07 AM, Terry Brown wrote:
> > > I recently started using my horizontal loop that is about a full
> > > wavelength on 80, for 20 meters.  I took down my yagi as we are
> > > moving; drat!  My Horizontal Loop is at 40 ft.  height and fed with
> > > 450 window line into a 4:1 voltage balun with about 15 ft. of coax to
> > > rig.
> >>
> >>
> >>
> > > I am running 100 watts through my KXPA100.  I tune a frequency in the
> > > CW portion of 20 to about 1.2 :1 and start sending CQ.  After about 3
> > > to 4  3x3 CQ's,, the SWR goes off the charts and power drops to zero.
> > > I can retune the antenna and the process repeats itself.  20 meters
> > > is the only band affected.
> >>
> >>
> >>
> > > I am wondering if I am having RF problems in that part of the 20 meter
> > > bands This only occurs on 20 meters.  The Amp is grounded, but the KX3
> > > is not bonded to the Amp.
> >>
> >>
> >>
> > > I would appreciate any advice.
> >>
> >>
> >>
> > > Thanks and 73's,
> >>
> >>
> >>
> > > Terry de N7TB
> >>
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> 


-- 
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Re: [Elecraft] OT: Feedline Question

[Brian D]

What difference does oxidisation make on bare wire, ot tinning?? My feeders
are mainly enamelled copper which won't corrode. Does the enamel make a
significant difference? Hs anyone done the comparisons?




Guy Olinger K2AV  wrote:

> What you appear to refer to by "open wire line" is BARE wire with small
> spacers widely separated. Performance changes a lot if the "open wire
> line" is constructed with unstripped THHN. Particularly with surface
> tension on new THHN. Where hung on the level in a misting rain, I have
> seen a droplet per centimeter hanging on THHN insulation. Along with a
> rather large variation in Z as seen in the shack.


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Re: [Elecraft] Future KX3/KX2 accessories

[Brian D. Comer]

As some additional insight into the care needed when working with some of
the most popular USB interfaces.

I have recently been  working on understanding the lack of sensitivity in a
900 MHz ISM device. This device is controlled by an FTDI245RQ USB interface.
The clock for this device can be an internal 12 MHz oscillator or a 24 MHz
external oscillator. The internal oscillator has very poor phase noise and
its 76th harmonic, present on the USB data lines, is strong enough to
de-sense a 900 MHz RX over a 7 MHz wide band. The DE0-Nano FPGA development
board which has a similar USB controller but with an external 24 MHz clock
also radiates significant energy on the 38th harmonic of its clock. 




Message: 5
Date: Thu, 30 Mar 2017 10:12:21 -0700
From: Walter Underwood 
To: Elecraft Reflector 
Subject: Re: [Elecraft] Future KX3/KX2 accessories?
Message-ID: <3fc92c0e-0d09-4b18-803d-dd475b108...@wunderwood.org>
Content-Type: text/plain;   charset=utf-8

Thanks for confirming my guess.

I remain amazed that serial connections are used so much in amateur radio.
Outside of amateur radio, I?ve used RS-232 connections once since the early
1990?s. In 2002, I connected a console to an HP-UX to rebuild the kernel and
get it on our net. I threw away all my RS-232 connector building stuff a
decade ago. Then I got into amateur radio.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Mar 30, 2017, at 8:32 AM, Matt Zilmer  wrote:
> 
> Hi Walter,
> 
> In the K3S, we could move the KIO3B digital electronics to the upper
section of the main board, far away from the RF board.  The main board is
also a multi-layer type, so we could sandwich most of the noisy digital
signals between signal ground planes, shielding them pretty effectively.
This solved the problem of digital noise getting into the K3S rx.  In the KX
radios, digital noise would be in close proximity RF boards, so that
opportunity is not available to us.
> 
> 73,
> 
> matt W6NIA
> 
> 
> On 3/30/2017 7:58 AM, Walter Underwood wrote:
>> That was my single complaint with the KX3, even before I bought mine. My
current setup is a rats nest of wires.
>> 
>> On this list, five years ago, Elecraft said that the USB chips were too
noisy to be inside the radio. I presume they found a way to deal with that
for the K3S, but they have more room to work with there.
>> 
>> wunder
>> Walter Underwood
>> wun...@wunderwood.org
>> http://observer.wunderwood.org/  (my blog)
>> 
>> 
>>> On Mar 30, 2017, at 4:03 AM, Peter Pauly  wrote:
>>> 
>>> USB Audio. Should have been in the radio from the beginning, 
>>> especially the
>>> KX2 since it's new.
>>> 
>>> On Thu, Mar 30, 2017 at 2:42 AM, Karl DK5LP  wrote:
>>> 
 My greatest wish:
 A schematic for the KXPA100/KXKAT100.
 
 
 vy 73 de
 Karl-Heinz, DK5LP /  AK5LP
 
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>> mzil...@roadrunner.com
> 
> --
> Matt Zilmer, W6NIA
> www.elecraft.com
> Office: 831-763-4211 x125
> Mobile: 909-730-6552
> [Shiraz]
> 
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Re: [Elecraft] Elecraft KX3 enhancement request - built in USB CAT and Audio interface

[Brian D]

A direct USB audio interface is something I miss too, as my main interest is
digital modes. However, I wouldn't want to ditch the 2m capability.

Brian Pietrzyk  wrote:

> Love my KX3! The ONLY thing I wish were available was a USB CAT/Audio
> module. Maybe it could fit in the vhf transverter space?  Or at the very
> least a data port option. I've been doing QRP digital modes on trips and
> outings with a Signalink USB but it tends to be a hassle. Anyone else
> feels this way or any 3rd parties out there offering this for the KX3?
> 
> Brian ve3bwp
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> 


-- 
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[Elecraft] For Sale RemoteRig 1258 MkII

[Brian D. Comer]

For Sale: RemoteRig  1258 MkII set with wifi added + Cables and RRC Micro
Client.  Like new condition  used very little  total cost was $909.75  from
Elecraft and HRO Asking $720. Will break out parts if there is interest.

If interested please contact me directly, off the reflector. 

73 

Brian 

KF6C

 

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Re: [Elecraft] EFHW

[Brian D]

1530KHz is about 200m wavelength so 2 half waves in phase would be about
200m tall, approx 650'





Fred Jensen  wrote:

> Well, the KFBK Franklin is two vertical 180 deg co-linear elements center
> fed [in-phase, I think], so I guess it would be about 1,600 ft [almost 500
> m].  A couple of the TV towers in Walnut Grove down in the Delta are 2,000
> ft [600 m], but they're not center fed. [:-)  I think most "half-wave" BC
> verticals are close to but not exactly 180 deg. IIRC, KFI [640 KHz] in Los
> Angeles has a 725 ft tower which is almost exactly 180 deg  but has a
> capacity hat that extends it to an effective 195 deg or so. When you drive
> by it on I-5, it is one very tall tower.
> 


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Re: [Elecraft] KAT500 ant control (Brian D. Comer)

[Brian D. Comer]

Bill

 

The station has a bank of 4 marine batteries and a 1 kw inverter backing up
the K3s, kat500, Steppir controller, Green heron rotor and the computer.
Power outages are a regular occurrence at this remote location in Upstate
New York, However; the first thing that would happen in this case would have
been the K3s would have powered down and not restarted. 

 

Thanks for the info though I appreciate your reply

 

Brian

KF6C. 

 

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Re: [Elecraft] KAT500 ant control (Brian D. Comer)

[Brian D. Comer]

Expanding my problem a little more. I have a remote that uses a KAT500 that
is now 3000 miles away. The KAT500 was calibrated to use the correct antenna
over all bands 160 to 6 meters at the specified increments (10 KHz 160 etc
and 20 KHz for the higher bands) For an unknown reason the KAT 500 has
switched to antenna 2 (160 and 80) for all frequencies. Unfortunately  I did
not connect the USB cable because I could not see recalibrating the kAT500
remotely . The remote is now shut down until I can persuade my daughter who
lives 60 miles from the station to add a USB cable I will have to have
shipped to her.

 

73 Brian KF6C

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[Elecraft] KAT500 ant control

[Brian D. Comer]

Can I change the KAT500 ant selection from the K3s

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[Elecraft] RE Bonding KX3/PX3/KXPA100 - any examples?

[Brian D. Comer]

I am not close to my set up now so I cannot send a picture.

 

>That first picture reflects one thing I hate about my KX3 and PX3 - when
you have

>everything hooked up, it is one mass of wires everywhere.

>The KX3 and PX3 is a fantastic pair in every other way, but dang, I can?t
handle

>the crows nest that it creates. 

 

I have laced all the cables that I use in my KX3, PX3 and remote KPA100
(mounted in rear of RV)into a single cable form.  It is now much easier to
setup without a bundle of disorganized cables. 

 

If there is interest I can take some pictures of the bundle and even the
fairly complex overall setup in the RV that includes a built in SDR that
also uses the kPA100.

 

This setup has no special bonding has no issues.

 

73 Brian KF6C.  

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[Elecraft] P3 Kit Pricing

[Brian D. Comer]

I am sure the extra cost for building and testing any of the Elecraft
products is worth the money if that is the way someone wants to go.  All the
Elecraft products I have,  or have had, were built by my son Andrew KK6EME
that includes 2 K3s, P3, KX3, KPA500, KXPA100 and a K2 /100(sold). The only
problem experienced was a mistake he made in the assembly of, if I remember
correctly, diodes to a heat sink in the KPA500. Elecraft replaced  the
needed parts to fix the problem at no cost.  Andrew is now 15 years old he
built the K2 at age 8. Unfortunately he has lost his interest  ham radio
now, but is still enjoying building another KPA500 for me. 

 

73 Brian KF6C.

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Re: [Elecraft] K30-Mini link stoped working.

[Brian D. Comer]

I had not changed the IP addresses, or the Sip Contact, I was able to
communicate with the RRCs on their correct address. However I just reset the
IP in the Sip Contact and it is now working. I am a little curious as the
status of the remote indicates the radio is off but its connections is oK.

Thanks

Brian KF6C

-Original Message-
From: Nr4c [mailto:n...@widomaker.com] 
Sent: Saturday, December 12, 2015 5:50 PM
To: Brian D. Comer
Subject: Re: [Elecraft] K30-Mini link stoped working.

IP addresses?

Sent from my iPhone
...nr4c. bill


> On Dec 12, 2015, at 8:26 PM, Brian D. Comer <br...@kf6c.com> wrote:
> 
> I am in the process of setting up a remote station. I have the 
> K30-mini and the two RRC1258 units with a K3S as the remote.
> 
> 
> 
> Currently I am on using my LAN, which worked fine on initial setup. In 
> trying to set up the remote using HRD and the control RRC, I have 
> broken the system. In returning the settings  to use K30 control the 
> only thing I see wrong is that the remote RRC settings indicate the 
> K3S is off. I had not taken a note of this setting when the  system 
> was working but the K3S is on and I cannot see why the RRC indicating 
> it is off. I have checked all cables on the K3S and remote RRC. Should the
remote RRC1258 be reporting radio ON?
> 
> 
> 
> 73 Brian KF6C.
> 
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[Elecraft] K30-Mini link stoped working.

[Brian D. Comer]

I am in the process of setting up a remote station. I have the K30-mini and
the two RRC1258 units with a K3S as the remote.

 

Currently I am on using my LAN, which worked fine on initial setup. In
trying to set up the remote using HRD and the control RRC, I have broken the
system. In returning the settings  to use K30 control the only thing I see
wrong is that the remote RRC settings indicate the K3S is off. I had not
taken a note of this setting when the  system was working but the K3S is on
and I cannot see why the RRC indicating it is off. I have checked all cables
on the K3S and remote RRC. Should the remote RRC1258 be reporting radio ON?

 

73 Brian KF6C.

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[Elecraft] Antennas with resistor and OCFD.

[Brian D. Comer]

I think stating any particular antenna configuration is unacceptable is
ignoring what could be an ideal antenna for a given situation.  As I
understand  it  a rhombic  uses a resistor, and sometimes works quite well.
On 160 I have an OCFD 1/2 wavelength that is goes from one side of the end
of a very small canyon  to the other.  The net result is that the center of
the antenna is about 80 feet above ground, the ends are only 50 ft above
ground. On flat ground this would be a NVIS antenna being so low; however,
with the ground 100 feet to the west at the same height as the antenna and
the ground 100 feet to the east being 300 feet below the antenna  I suspect
the pattern looks more like a beam pointing east. Considering I have broken
two important rules, the antenna is OCFD, and is on average it is well under
1/2 wavelength above ground it is amazing I can work the east so well.

 

73 Brian KF6C

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[Elecraft] FW: K3/0-MINI and windows 10

[Brian D. Comer]

Please ignore this message, at some time windows 10 did install the drivers.

 

73 Brian KF6C.

 

From: Brian D. Comer [mailto:br...@kf6c.com] 
Sent: Thursday, December 10, 2015 9:21 AM
To: 'elecraft@mailman.qth.net'
Subject: K3/0-MINI and windows 10

 

Does anyone have any experience installing the FTDI  drivers on windows 10
for the K3/0 mini. Windows 10 does not appear to install them automatically.
I cannot find instructions on the web site.

 

Thanks 73

 

Brian KF6C. 

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[Elecraft] K3/0-MINI and windows 10

[Brian D. Comer]

Does anyone have any experience installing the FTDI  drivers on windows 10
for the K3/0 mini. Windows 10 does not appear to install them automatically.
I cannot find instructions on the web site.

 

Thanks 73

 

Brian KF6C. 

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Re: [Elecraft] Crackling in Headphones

[Brian D. Comer]

I did not calibrate my K3s smeter on initial assembly, nor have I done it
since, so the following is as per factory setup with no atten or preamp,
AGC-F, RFgain Max.  The radio has KFL3B-FM, KFL3A-6K, KFL3A-2.8K,
KFL3A-400, and KBPF3A  installed. 

 Injection of  a 50uV signal (50 ohms) (-73dBm) at 7.05 MHz produces an S9
reading and the P3 indicates about -76 dBm. It falls to about S8 with 50 Hz
bandwidth setting. (I have not performed any filter calibration)

Injection of a 50uV signal at 1.4 MHz produces an S8 reading and the P3
indicates about -83 dBm..

A local broadcast station on 1450 kHz produces -10dBm into 50 ohms from my
antenna, as measured with a calibrated Anritsu MS2034A spectrum analyzer.
Applying this signal to the K3s thru an attenuator indicates the signal is
about 70 dB over S9. Removing all attenuation results in good audio but with
some crackling. The carrier display on the P3 is not stable under these
conditions. Tuning down to 640 KHz KFI produces a -20dBm signal into the K3.
Listening to KFI under these conditions produces clicks at times but the
audio is generally very good.  

This may not be anything to do with crackling noticed by others but better
documents the problem I had.

73

Brian KF6C.

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[Elecraft] Re Elecraft] Crackling in Headphones

[Brian D. Comer]

 

I have noted a similar Cracking in the speaker when listing to AM broadcast
station KFI (640 KHz). At first I assumed it was just overload as I was
using a 160 meter dipole and the signal strength meter was maxed: however
moving to steppir antenna tuned to 40 meters gave the same result with and
smeter reading of only S9. 

I have a local AM station on 1450 KHz that produces a -10 dBm into a
spectrum analyzer and -30 dBm on the P3. I had assumed from this, without
making any further checks, that the receiver was just overloaded.  

The cracking sound does not sound like any dynamic range problem I have
heard before but I have not taken the time to make any serious tests. 

I make these comments because I am not convinced this is any form of
overload and wonder if it could be related to your problem.

 

73 Brian KF6C.  

 

On 30 Nov 2015 14:02, j...@kk9a.com wrote:

> There are times that I have noticed a crackling sound in my headphones 

> with my K3S. This is not the normal band noise static that has depth, 

> this crackle sound seems very close to my ears.  I first noticed it 

> with my Heil headset and I tried wiggling the connection, changing the 

> RX EQ settings and turning on noise reduction but nothing had any 

> effect. It randomly comes and goes and I think I have also heard it on 

> TX. I thought perhaps it was related to the Heil brand headphones. 

> Last night I plugged in a new Sony professional headphone and the 

> crackling sound was very strong for a few minutes and then eventually 

> went away. I have never experience this with any other radio and I 

> have no idea what is causing it or how to make it go away.

> 

> John KK9A

 

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Re: [Elecraft] Sherwood Receiver Test Data - K3S Added Today (Don Wilhelm)

[Brian D. Comer]

I think if I chucked the power supply for my TCS12 TX and RX, the K3 and the
KX3 in the lake they would all end up at the bottom maybe take different
times to get there but I can't see any of them floating!

73
Brian KF6C.

-Original Message
Ohhh, and they need to include a power transformer which gives them 
enough weight to allow them to sink to the bottom of the lake.

*

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Re: [Elecraft] QRP signals from Pathfinder probe (off topic)

[Brian D]

Voyager is still going strong many times further away than Pluto, 315w to a
3.7m dish. from over 19 billion KM.


a...@sbcglobal.net wrote:

 Heard last night on  Nova program that the transmitter on the Pathfinder
 Pluto probe was 10 watts.  Anyone have a clue as to the signal path loss
 at 3 billion miles and what levels the deep space dish receiving networks
 are dealing with?   Incredible that the data stream can be extracted from
 the noise. Mike  AC5P
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-- 
Brian Duffell G3VGZ
  YarmEngland
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