Put it into TX on a dummy load and run your batch file and find out!
73 de David, M0XDF (K3 #174, P3 #108)
On 7 Aug 2013, at 04:35, drewko wrote:
Ray,
Tks again for the idea. I now have the batch files set up to switch
the K3's ANT every hour, half-hour or 15 mts while WSPR is running.;
On 8/6/2013 8:49 PM, David Gilbert wrote:
Currents most certainly do not flow uniformly in ground planes, and
coupling effects can be real whenever significant gain is involved.
Actually, what happens is that a trace above an ideal ground plane
(the ground layer) forms a transmission line,
On 8/6/2013 8:45 PM, Don Wilhelm wrote:
I may b unique because my lower range hearing without the aids is
normal, so I have built-in low pass filters in my ears.
That's entirely normal, Don. In general, hearing loss starts at the high
end and moves down. Many folks with a lot of hearing loss
Since this subject is current (and likely always will be!) I have to ask the
learned brethren which filter does experience show to be best for use with
JT65 mode. I currently only have the standard issue 2.7KHz filter, which of
course works OK for everything (except I suppose DSB and FM). If I
I do a lot of PSK31 on my K3. I use about 2K of bandwidth when
looking for signals. When I start a QSO, I narrow the bandwidth
-- some times all the way to 50 Hz -- to limit audio overload to
my sound card from nearby loud signals. I have a 250 Hz filter
installed, and the reduction in general
Many thanks indeed to all who have so kindly passed on valuable info and advice
on filters . The underlyingt suggestions advise just trying just one initially
until the radio is assembled and used for a period. I have done just that with
the 5-pole 500 filter - as it happens the cheapest too.
Even with dummy loads connected I'd hesitate to hot switch ANT.
Perhaps could try it while transmitting at 0 watts?
73,
Drew
AF2Z
On Wed, 07 Aug 2013 09:25:24 +0100, you wrote:
Put it into TX on a dummy load and run your batch file and find out!
73 de David, M0XDF (K3 #174, P3 #108)
On 7
The problem is that speech intelligibility depends on sounds in the
range of 500 Hz - 4 kHz, with the 2 kHz octave being most important,
the 1 kHz octave close behind.
More specifically, the range(s) from roughly 250 to 750 Hz and 1400 to
2400 Hz are most critical to speech intelligibility.
For JT65, WSPR, etc. I just use the narrowest filter when on frequency
and the P3 to see where signals are. In my case, that filter is the
250 Hz.
With the K3, remember that you're not selecting a filter so much as
setting a bandwidth. Filters kick in as they're called for, and this
is slaved
It depends on conditions and software. For example JT65-HF does not
like to decode if it does not see the entire 200-2800 Hz audio spectrum
but WSJT-X seems to work fine with a restricted bandwidth. All of the
software is designed to cope with the entire 0 - 4000 or 0 - 5000 Hz
spectrum but
I wonder what resulted from this. I looked at it also and found that although
this high-capacity battery probably fits physically, it may not be a good
idea to put it inside the K2 due to the power switch and the indicator LED.
See image at e.g Aliexpress.com
Sort of a benchmark for essential audio bandwidth is to consider the
current practice in the A.M. broadcast industry, at least in the USA.
A recent report in Radio World notes that most analog A.M. broadcast
receivers today have a bandwidth of less than 5 kHz.
Listener tests showed that most
Hi Sverre, I am still using this battery external to the K2. It is very
convenient as it just sits under the rig and easily connects to the K2
power jack with the attached cable provided, no mods required. Yes the
switch needs to be ON both for charging and when in use as a supply for the
K2, and
Or ... maybe not. Copying SSB on a speaker is nearly impossible for me,
and CW is hard. Unfortunately, my aids do not work under my headphones.
They have an anti-feedback capability and just shut down if I put the
cans on over them. They also notch out passing sirens and CW fools them
into
I didn't say that RF current in a ground plane wasn't well-behaved,
whatever that means. I said that it wasn't uniform, as in uniform
density. It's not.
73,
Dave AB7E
On 8/7/2013 2:10 AM, Jim Brown wrote:
On 8/6/2013 8:49 PM, David Gilbert wrote:
Currents most certainly do not flow
On 8/7/2013 8:39 AM, Ron D'Eau Claire wrote:
So if you enjoy music on your A.M. radio, note that it's unlikely
your radio is reproducing much of anything above 5 kHz.
99.99% of AM broadcast receivers have audio bandwidth of less than 5
kHz. The only ones I know of with bandwidth greater than
Ray,
short answer: Use the SSB bw filter for JT65.
The sw looks at up to 4-KHz bw, if available, and the narrow band
feature of this mode is accomplished at the digital level in the sw
(inside the computer). Narrowing bw below this just limits the
number of signal the sw looks at. JT65
As I recall from my broadcasting classes years ago, human speech has a
typical bandwidth of just 3KHz. Normal human hearing, IIRC, picks up
frequencies from 20Hz to 20KHz.
If someone has a copy of Schrader's Electronic Communications ready to
hand, the specifics should be in there somewhere.
-
I have worn hearing aids since 1996 (on my second pair). Because
hearing was very important for my work, I bought the top quality
offered. I wear Phonac Savia OTE (over the ear) model. In 2006 they
cost $2600/ea. Previously, I had an in-the-ear model which worked
pretty well using a
Greetings,
I was thinking of picking up one of these antennas as well. The only problem is
my shack is approximately 10 feet from the only place where I could put a flag
pole antenna. If I’m running barefoot, will this antenna be too close to the
shack and start causing me problems? I lack
On 8/7/2013 10:40 AM, Alan Jump wrote:
As I recall from my broadcasting classes years ago, human speech has a
typical bandwidth of just 3KHz. Normal human hearing, IIRC, picks up
frequencies from 20Hz to 20KHz.
If someone has a copy of Schrader's Electronic Communications ready to
hand, the
On 8/7/2013 11:10 AM, ke6...@gmail.com wrote:
I was thinking of picking up one of these antennas as well. The only problem is
my shack is approximately 10 feet from the only place where I could put a flag
pole antenna. If I’m running barefoot, will this antenna be too close to the
shack and
I'm running with a 16ft 1/4wave on 20m vertical with a 40 ft wire running
horizontally from its
tip northward to a branch on a nearby tree as an Inverted-L. The vertical is
about 22 feet SW
of the operating position, and the wire is about 11 feet horizontally, at its
closest
point (W) of the
Thanks Deni,
I listed your LiPo battery as an alternative on the LA3ZA Unofficial Guide
to Elecraft K2 Modifications under the KBT2
http://la3za.blogspot.no/p/la3za-unofficial-guide-to-elecraft-k2_28.html#KBT2
(scroll down a page or two)
-
Sverre, LA3ZA
K2 #2198, K3 #3391,
LA3ZA
Hi!
I have a K3 station with K3, P3, KPA500 and KAT500 connected with the
correct Elecraft-supplied serial cables. The station works great, band
changes are rippled through all components correctly and I have no
operational issues. The PC is 64-bit Win7SP1.
I am however having a problem
Certainly true for youngsters. As a teen, I could easily hear TV sweep
oscillators (16 kHz). But it's all literally down-hill (or down-frequency)
from there, especially those of us d were exposed to a lot of nearby weapons
firing in the military. You don't wear ear protectors in the Army.
I
I've been wearing Hearing Aids for over a year. Mine are the Behind
the Ear type from Costco with much of the latest technology. An option
for them was a Bluetooth transmitter that worked into the aids remote
control box. The idea being it was to be used with an external audio
source like
In Friedricshafen there was a pair of nice little speakers with KX3 on
the Elecraft boot. Could someone tell me who does make it?
73, István, HA4ZD
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Help:
What bluetooth module are you using ?
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Why don't you try it first with a piece of wire where the vertical would be.
You can run it up the center of plastic conduit or support it with a horizontal
rope. Pretty cheap way to test things out.
Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
Owner - Operator
Big Signal
Selling my mint condition KAT 500 tuner (7 months old). $625. plus 1/2
shipping from PA. Please contact me off list. howar...@lehigh.edu
Howard AE3T
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Help:
It's called TVLink by Phonak
73 de NS9I
On 8/7/2013 5:19 PM, Richard Neese wrote:
What bluetooth module are you using ?
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That is the common misconception. Actually most AM stations go out to at least
10 and often 12 kHz (look on your P3). The exceptions are the stations
transmitting an HD signal -- they are necessarily band-limited to 7 kHz. I
boycott HD stations for that reason. I can tell the difference on a
Correct. According to the KFI chief engineer they applied pre-emphasis in an
attempt to flatten the frequency response of lousy AM receivers a bit.
Al W6LX
This made AM even muddier than it already was, so AM broadcasters adopted the
standard of applying pre-emphasis to their signals.
Greetings,
I actually have one of those mighty fine junk 17 foot telescoping whips as
one of my few traveling antennas for the kx3. I think this weekend ill set
it up where the flag pole would go and give it a ride! I'll fire up the 590
(one day to be replaced by a K3) and see what happens. Don't
http://www.amazon.com/Azeca-BTT005-Stereo-Bluetooth-Transmitter/dp/B005LLBIJ0
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I tried it, it does work ... But just don't try to send CW with it! The delay
makes it very difficult.
- Joe
- WB2SSB
Joseph Sanger, M.D.
Director, Radiology Informatics
NYU Langone Medical Center
Room D-107
Bellevue C D Building
Phone: 212 263-3434
On Aug 7, 2013, at 9:34 PM, Richard Neese
On 8/7/2013 2:59 PM, Bob W7AVK wrote:
Mine are the Behind the Ear type from Costco with much of the latest
technology.
W6OAT likes the set he bought from Costco. My XYL tells me the the word
on the street is that satisfaction can depend on the experience of
personnel in the particular
Whether BTE hearing aids work with headphones or not depends a lot on
the earpads of the headphones.
I have one Sony headphones that work fine (large earpieces) while
another Sony I have produces squeals. My CM500 headsets do not work
with my hearing aids in, so I take them out.
73,
Don
Right Al, it takes 10 kHz of RF bandwidth with A.M. to produce 5 kHz of
audio bandwidth after demodulation.
I thought my comment was clear in context. The thread was about the
desired/necessary audio bandwidth. My apologies for the confusion. I should
have said audio bandwidth.
73, Ron AC7AC
Nope, sorry it was me that wasn't clear. I did indeed mean audio bandwidth.
Look at any AM station with your P3 -- it will be easy to measure the
bandwidth. I rarely if ever see anything less than 7 kHz (14 kHz total BW) for
an HD station, higher for all-analog stations.
Al W6LX
I must say, I'm glad this thread is out there. I'm in my mid 30's, and as
prior military and current law enforcement (thus the call) I have had my
fair share of bangs next to my ears. The xyl is already complaining about
my hearing, and I have to admit, my hearing isn't what it once was. I'm so
I have Phonak BTE hearing aids and I also have a Phonak ComPilot Pendant,
which is a Blue Tooth Streamer and Remote Control.
It is a Miracle Pendant that hangs around my neck. It operates Blue tooth
with my iPhone and with my TV's (I also have the Phonak TVLink),
but it also has a cable input
OK, just gotta tell my hearing aids story again. I told it over on the Yahoo
KX3 group, so if you read it over there, you can just delete this message.
My wife said I wasn't listening to her anymore. I told her that my hearing
wasn't as good as it used to be, and that I couldn't hear her very
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