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hamchatforum - hamchatforum.lefora.com/ | Site profile
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Site profile page for http://hamchatforum.lefora.com/.
This report page has aggregated and summarized the online discussions from the Message Board located at http://hamchatforum.lefora.com/.
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Posting activity table on hamchatforum:
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3 Months
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122
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452
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960
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Post:
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389
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2,558
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Rating - The position measured by activity among all forum sites tracked by BoardReader.
If rating is 10 there are 9 forum sites which have higher activity.
Posts - Number of posts on forum site during last 7 days.
Threads - Number of threads on forum site active during last 7 days.
Authors - Number of authors which contributed to the site within last 7 days.
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hamchatforum posting activity graph:
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http://hamchatforum.lefora.com/ Alexa graph:
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Top authors on hamchatforum during last week:
user's latest post:
Inductors and Loading Coil...
Published (2009-11-25 10:42:31)
Current Through Coil Related pages: Inductor spice model There has been some speculation that current is high only in the first few turns of a loading inductor. Radiation comes solely from charge acceleration or current over spatial (in line) distance. If any loading inductor shows substantial decrease in current over the length of the inductor, it is an absolute certainty that the inductor is poorly designed and that the system...
user's latest post:
Amateur Radio NewslineT Report...
Published (2009-11-25 08:41:06)
NEWSCAST CLOSE With thanks to Alan Labs, AMSAT, the ARRL, the CGC Communicator, CQ Magazine, the FCC, the Ohio Penn DX Bulletin, Radio Netherlands, Rain, the RSGB, the Southgate News and Australia's W-I-A News, that's all from the Amateur Radio NewslineT. Our e-mail address is newsline@arnewsline.org . More information is available at Amateur Radio Newsline'sT only official website located at www.arnewsline.org . You can also...
user's latest post:
VHF Stability
Published (2009-11-25 10:16:00)
Uses For Improved Suppressors Series-resonant suppressors are used with slightly inductive resistor paths, and larger-than- normal shunt inductors. A small capacitor is placed in series with the inductive resistor path, and this capacitor series-tunes the resistor path. This results in a very rapid shift of current into the resistor as frequency is increased. This works well with amplifiers operating at 1/3 to 1/2 the instability frequency,...
user's latest post:
Transmitting Antennas at W8JI
Published (2009-11-25 09:07:53)
Specifications @ 15 degree wave angle: All compass directions. Electrically rotatable. Directivity factor 12.1 dB, Half-power Beamwidth 53 degrees
user's latest post:
Contest Station W8JI
Published (2009-11-25 09:22:08)
W8XR Mark A. We had Mark A and Mark B, what could be better? Mark A drove down from Toledo, Ohio to show us his Flex Radio SDR-1000. Mark was a tremendous asset. Mark A helped with wiring and other technical issues during off-the-air periods. Mark A is nothing short of a genius! We hoped the SDR-1000 band display would, as another operator claimed, give Mark B the advantage of "seeing pileups" when new...
user's latest post:
Planet X Nibiru Projected...
Published (2009-11-25 12:24:02)
As astronomers observed Uranus, noting irregularities in its orbital path, many speculated that they were witnessing the gravitational pull of an unknown planet. So began the first planetary search based on astronomers predictions, which ended in the 1840's with the discovery of Neptune almost simultaneously by English, French, and German astronomers. But Neptune was not massive enough to account entirely for the orbital behavior of...
user's latest post:
Common-Mode Noise
Published (2009-11-25 11:44:14)
Solutions A typical isolation scheme would be to use an isolated primary and secondary in the matching transformer, and ground the feedline shield some distance away from the antenna's signal ground. This will introduce several thousand ohms of reactance in the common-mode signal path, as well as provide another path to earth for common-mode noise. Another method, in cases where the feedline can not be isolated through a floating primary...
user's latest post:
WE6W Resonant Speaker (N5ESE...
Published (2009-11-26 02:56:42)
Tuning was simple. Keep the volume/gain very low to begin with, because it's very easy to overdrive this speaker and create distortion products. The speaker is very efficient and doesn't need much energy to do it's job, but you might be tempted to overdrive it if you're "off-frequency" from the peak. If you're using a ham receiver as your audio generator, tune to a fairly strong CW signal. Use the broadest...
user's latest post:
Funny Jokes
Published (2009-11-26 06:11:01)
Moth jokes How do you make a butterfly? Flick it out of the butter dish with a knife! What is a myth? A female moth! What insect lives on nothing? A moth, because it eats holes How do stones stop moths eating your clothes? Because rolling stones gather no moths! What do insects learn at school? Mothmatics! What's the biggest moth in the world? A mammoth! Why did the moth nibble a hole in the carpet? He wanted to see the floor show!...
user's latest post:
School collection
Published (2009-11-26 06:18:00)
What did Noah do while spending time on the ark? Fished, but he didn't catch much. He only had two worms! Mother: What was the first thing you learned in class? Daughter: How to talk without moving my lips! What did Caesar say to Cleopatra? Toga-ether we can rule the world! Teacher: What's big and yellow and comes in the morning to brighten a mothers day? Pupil: The school bus! What happened when the slave put his head into a lions...
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Top 10 active forums on hamchatforum during last week:
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Top 10 forums on hamchatforum:
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Latest active threads on hamchatforum:
Started 1 week, 3 days ago (2009-11-19 16:26:09)
by enigma685
Leonids meteor shower pings on YouTube
A video of pings recorded during the Leonids Meteor Shower is now available on YouTube.
The YouTube description reads:
Leonids Meteor Shower at 08:30-08:40 JST(+09:00) Nov.18 by HRO (Ham Radio Observation)
The long echo began at around 08:36.
Watch Leonids Meteor Shower 2009
Meteors ...
Started 1 day, 6 hours ago (2009-11-28 22:18:19)
by sispy
OSCAR 11 was heard again on 145.826 last week after an absence of 18 months.
Clive G3CWV has been collecting reception reports and has posted this update
to the AMSAT Bulletin Board:
Very many thanks to everyone who sent reception reports of this satellite or posted them to this bulletin board.
I've been overwhelmed by the number received! I've replied to ...
Started 2 days, 17 hours ago (2009-11-27 11:18:03)
by sm6wet
I hope to work him as for some reason Tonga has evaded me on all bands.
There is however one thing that Dave needs to take care about. As I understand it he may not be able to work the whole contest.
There is a law in Tonga that illigalize everything that has to do with trade, work, sports on Sundays. One need a special permission to be excemt from the minister of police and those who ...
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Hot threads for last week on hamchatforum:
Started 4 days, 18 hours ago (2009-11-25 10:35:13)
by rinaldo
The Difference
Between a Loading
Coil and a Normal
Inductor
There really
isn't any difference
between a
loading coil
and a conventional
inductor or coil
used in other
systems, except the
impedances and
surroundings are
different. The
inductor or coil
behave the same way
whether the load is
a radiating antenna
or an electronic
circuit. An inductor
is an inductor, it
...
Started 4 days, 20 hours ago (2009-11-25 08:37:04)
by gimena
Thank you Andy. Now, Amateur Radio Newsline report number 1684 with a release date of Friday, November 20th, 2009 to follow in 5-4-3-2-1. The following is a Q-S-T. The FCC's new chairman testifies before congress on distracted driving. Is congress looking at some sort of nationwide ban? Also, BPL to disappear in Manassas Virginia, 60 meters comes to Trinadad and Tobago, a ham in ...
Started 4 days, 18 hours ago (2009-11-25 10:10:07)
by raimondi
L1 and C2 is
the primary
stability problem,
since the parallel
resonant combination
it floats the grid
off the chassis.
Unfortunately we
cannot greatly
affect L1/C2 because
they are mostly
inside the tube. We
want L1/C2 to be
resonant as far
above the operating
frequency as
possible, and to
have the lowest
possible impedance
below the operating
...
Started 4 days, 19 hours ago (2009-11-25 09:12:15)
by lariih
There are a few
islands like this
where cables and
conduits from
different directions
collect. This
provides easy access
when new cables are
installed. Notice
some cables are
directly buried. All
transmitting cables
are 50 ohm, all
receiving cables 75
ohm. All of the
large hardline
cables are 50 ohm in
this picture.
The two large
white pipes at the
bottom...
Started 3 days, 22 hours ago (2009-11-26 06:13:22)
by marqie
Teacher: Why does the statue of liberty stand in New York harbour?
Pupil: Because it can't sit down!
A history joke
What was Camelot?
A place where people parked their camels!
A history joke
Who gave the Liberty Bell to Philadelphia?
Must have been a duck family
A duck family?
Didn't you say there was a quack in it!
An ideal homework excuse
Teacher: Where is ...
Started 3 days, 22 hours ago (2009-11-26 06:20:13)
by sonam90
How many balls of string would it take to reach the moon?
Just one if it's long enough!
What cheese is made backwards?
Edam?
This match won't light!
That's funny, it did this morning!
What do elves do after school?
Gnomework!
If Ireland sank into the sea, what county wouldn't sink?
Cork!
How do we know that the Earth won't come to an end?
Because ...
Started 4 days, 19 hours ago (2009-11-25 09:03:27)
by silverio
Interests Change
I was always mostly
a 160 meter
operator. I had
little interest in
bands other than
160, 40, and 80
meters.
Around 2003, Bill
Fisher (W4AN)
started talking with
me about a joint
contest effort for
all bands, not just
160 meters.
Unfortunately Bill
passed away April
4th, 2004, so our
plans never came to
fruition. Bill
willed me his...
Started 4 days, 16 hours ago (2009-11-25 12:19:58)
by jesualdo
large scale hypothetical planet that's part of our solar system with an
orbit beyond that of Neptune. Was first hypothesized in 1841 when
astronomers noticed Uranus did not move as predicted in it's orbit.
Based on these residuals, the search for Planet X began. Please keep in mind, I'm not a graphic artist.
(doh) But most importantly, the dates illustrated below are just ...
Started 1 month, 1 week ago (2009-10-20 15:46:58)
by p34u
Horse in the House Joke
Joe was trying to lead a horse in the street, but was having much
trouble getting the horse’s cooperation. A passerby stopped and asked
if he could help. Joe was grateful and gladly accepted.
After much pushing and shoving, they finally got the horse to the
front door of Joe’s department. Joe indicated that the horse was to go
through the door. More ...
Started 4 days, 18 hours ago (2009-11-25 10:49:21)
by simone
Low Impedance
Systems
With low impedances,
optimum form factors become more
"square".
"Square" meaning the
length to diameter
ratio is unity. Optimum
length in low
impedance
applications is short
when
compared to diameter
because stray C has
very little effect. The
load capacitance or
resistance from the
external circuit
dominates the system
current when ...
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