Thanks to everyone who helped me determine what my paddles might be
worth. I've decided to put them on Ebay, but if any Elecrafters would
like to make an offer here, I'll certainly consider lower offers than
the Ebay price.
Thanks for your help! Here's a link to the auction for pics:
Well, since you brought up EFHW there is a relevant comment I've wanted
to make for a while.
An EFHW with a counterpoise wire (which everyone seems to claim is
important to have) is basically just an extreme version of an off-center
fed dipole. A half wave dipole has its lowest impedance at
All true. In fact, I was going to mention that for a real world antenna
there is usually some smoothing between lobes and nulls, especially when
there are lots of them involved. I left that out because I didn't want
to go overboard on my comments.
Another facet is that for any particular
Ah, he quotes Picard and the Tao of Pooh for his purpose.
But that was all in the process of forming bonds . . . and as we all know,
saying bonding on this refelctor will open a torrent of additional debate.
Ted, KN1CBR
--
Message: 8
Date: Thu,
For reasons of family convenience, I have started to run my KX3 remotely in my
Loft using our WiFi Lan from a computer three floors down.
I have assembled a Raspberry Pi 3 in a case with a 7” LCD screen. The inbuilt
wifi on this puts in on my home network.
Using ser2net on the Raspberry Pi, I
Ron, love your comment. I use EFHW and it is amazing the confusion over how
they work. Got to have a great transformer and a chosen antenna length and
stick to it and perhaps a multiple that fits. My 160 EFHW is made for 1.900
and works well at 3.800 in certain directions on either band. I
Right. The mats are usually grounded directly since they have a fairly high
internal resistance, while the wrist strap that features a metal contact to the
user has a 1 meg resistor in series.
73, Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
A mistaken idea that many Hams get is that a wire antenna has no radiation in
the "nulls". For example, a half-wave wire is often thought of as having no
energy radiated off of its ends. There is LESS off the ends, but a real-world
wire has some radiation in ALL directions as Dave notes. It's
Well, they never wandered out to Bowman Flats on Old Airport Road.
Apparently, I could have used them.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 1/12/2018 11:37 AM, Dennis Moore wrote:
More common than you think :-) There are eight of them not far from
my place.
I follow Elecraft Engineer Paul's advice (after he studied the electrical
characteristics of a number of mats) and avoid any mats that do not specify
their ohmic values. Too often, such mats better insulators than static
dissipating devices.
So I'd at least e-mail the manufacturer for
An antistatic mat 'worth its salt' will have a ground connection and the
distributed conductance of the mat material provides safety from the
direct ground.
Yes, wrist straps are different, they have a large resistor (about 1
megohms) in series with the ground connection. Mine connect to a
Well, bummer! EZNEC4+ won't model a conductor 52,800 feet long. :-(
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 1/12/2018 11:34 AM, Cady, Fred wrote:
I wintered over at Byrd Station in 67-68. The "Long Wire" VLF station was, as I
remember, about 11 miles away from the main
For transmitting, that 10-mile long conductor would be close to an
end-fed full-wave, and perhaps a flame-thrower, for SAQ [17 KHz]. On 20
meters, it would be an end-fed 805 wavelength conductor [wonder how that
would model in EZNEC?], all the power dissipated in the first few
hundred meters
Also, I believe ESD wrist straps should have something like a 1 meg ohm
resistor in the ground connection to mitigate direct (and potentially fatal)
shock to ground while allowing the bleed off static charge. A direct
connection to ground is hazardous!
Steve
aa8af
> On Jan 12, 2018, at
Several programs like RUMLogNG interface directly with WSJT-X. It’s really
seamless, just click ok when the log window pops up and data is sent to the
logging program.
Ray
W8LYJ
Sent from my iPad
> On Jan 12, 2018, at 14:35, elecraft-requ...@mailman.qth.net wrote:
>
> PX3? Logging FT8
Taking the headphones off and laying them on the desk seems to boost the
SNR of a CW signal significantly. Helps with closely spaced QRM too.
It's been known to RO's since the "olden days."
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 1/12/2018 2:13 AM, Petr, OK1RP/M0SIS wrote:
More common than you think :-) There are eight of them not far from my
place.
http://www.pawsweb.org/
Dennis NJ6G
On 1/12/2018 11:32, Fred Jensen wrote:
This could account for why my 2 wavelength Beverage never seemed to
perform well on 80 when we lived in Auburn CA. Elephants are very
I wintered over at Byrd Station in 67-68. The "Long Wire" VLF station was, as
I remember, about 11 miles away from the main Byrd station to get away from
noise sources for the research that was being done. Several of us at Byrd
walked out there one day (although I guess it was night, seeing
This could account for why my 2 wavelength Beverage never seemed to
perform well on 80 when we lived in Auburn CA. Elephants are very
uncommon in the foothills of the Sierra Nevada.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 1/11/2018 8:41 PM, William Levy wrote:
Best of all
That's to all who responded.
73
Tim
NZ8J
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I think might (in some way) OT except that folks here build kits…..
No knocks on ebay - like everywhere else, if you are careful, you can get what
you pay for. I’ve found great things there for very little money on ebay.
For comparison, a range of bench mats from Newark:
Hey Burny,
Have u tried downloading the MacOS version of WSJT-X?
73
Frank
W3LPL
- Original Message -
From: Bayard Coolidge, N1HO via Elecraft elecraft@mailman.qth.net
To: Brian “VE3BWP” Pietrzyk ve3...@gmail.com, Elecraft Reflector
elecraft@mailman.qth.net
Sent: Fri, 12 Jan 2018
On 2018-01-12 01:32 AM, F5vjc wrote:
Found on Amazon, looks very handy but is it really antistatic (ESD safe)
for our purposes?
I wouldn't touch that type of mat if you are working with static sensitive
electronics.
For a proper ESD mat take a look at this:
Just for kicks, I modeled it with a 1/4 wave counter poise up 12' up
from ground. 14 MHz.
Unfortunately where ground is a question. What the parameters for
"ground" is a good question. Snow doesn't look like earth.
Anyhow the impedance came out 11470 ohms +j 17880.
The horizontal antenna
I don't know much about antennas, but in the late 60s or early 70s I worked
a station on 20 meters with a 10 mile long (long wire antenna).
That was KC4AAD in Antarctica. I don't have the QSL card I got back then,
but was a picture of part of the antenna. I know it was 20 meters, because I
only
Looking for an MH3 mic for my KX2. Maybe you got one with a new KX2/KX3 that
you aren't using and would like to sell please send details to include price
shipped to zip 45324.
Thanks
Tim
NZ8J
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Home:
Hi,
yes, exactly. The silicone only means insulating with low charging but there
is no way to
dissipate nor conduct the charge away to ground.
The standard ESD mats has the top dissipative layers and bottom conductive
layers mats connected to central ground and equipped with wrist strap.
73 -
If there's no ground connection to the mat itself, then for ESD it's about
as useful as a chocolate coffee pot!
Google for groups on the 'net who sell mats and have properly evaluated
them. The ideal thing is a proper mat with a (resistive) ground connection
and a stud to connect wrist strap.
Plus the simple dipole in your example has a lot less RF coming back into
the shack.
John KK9A
David Gilbert wrote:
There is only a fixed amount of total energy contained in all the lobes
of an antenna. You almost definitely did get lots of lobes ... but you
also got lots of nulls that
I don't believe the mat is anti-static any more than my wife's silicone baking
sheets.
They claim the tweezers "adopts anti-static design to prevent static damage to
electronic components", whatever that means. No wire attachments are shown for
the tweezers.
I don't think this is what you want
Bill,
The situation you had was essentially a point to point communications
setup. It worked well for you. Commercial installations long ago used
long wire antennas (including rhombics) pointed in specific directions
to assure good point to point communications. It isn't a "work all
Hi all,
there is an interesting article about the improving perceived loudness by
6dB and that of the background noise by 3dB, resulting in a net 3dB
improvement in the signal's SNR on CW...
https://plus.google.com/100312042524727617304/posts/gtNciqaFQk5
BTW: be careful as there are a little
Hi,
it is not about the antistatic only...
It is about the conductivity and dissipation etc.
Generally speaking, the performance of ESD mats depends on the material from
which they are constructed. That material can include:
• Homogenous mats are comprised of either vinyl or rubber. These
The macOS version of WSJT-X logs contacts in the same way as the Windows and
Linux versions.
I assume the version of macOS you are running is reasonably up to date,
preferably Sierra orHigh Sierra, and that you installed WSJT-X as a user.
If you are having problems logging, check WSJT-X ->
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